Extravasation detection for fluid injection using dopppler ultrasound blood flow measurement

A method and apparatus

A regional anaesthesia injection apparatus 1 comprising an injection volume determiner (16, figure 2) and an injection pressure determiner (20, figure 2). A controller is coupled to the injection volume determiner and to the injection pressure determiner and configured to provide an injection signal to control injection of fluid into the target tissue based on the determined pressure and the determined volume. Prior to injection the controller is operable in an aspiration mode to identify a reduction in pressure associated with attempting to aspirate a volume of fluid from the tissue. The apparatus can issue an audible or visual alarm if the detected pressure-volume characteristics depart from a stored profile by more than a threshold amount. There may be multiple stored profiles for different types of injection. The detected pressure-volume characteristic may be displayed on a visual display. Delivery of the anaesthetic and aspiration can be controlled by buttons 7a, 7b on the handle 3b ...

INFUSION SYSTEM WITH A METERING UNIT

PRINTING INFUSION SYSTEM WITH RIVER RESISTANCE TEST

PROCEDURE FOR CONTINUOUS SUPERVISING OF THE FUNCTION OF AN EXPENDITURE SYSTEM AND A DEVICE FOR THE EXECUTION OF THE PROCEDURE.

PUMPING SYSTEM WITH ERROR DETECTION FOR THE CLINICAL NUTRITION

FLUID HAULAGE SYSTEM FOR THE DETERMINATION OF A FLOW PARAMETER

Syringe pump rapid occlusion detection system

INTRAVENOUS LINE VALVING SYSTEM

Pneumatically coupled fluid control system and process with air detection and elimination

A fluid control system for delivery of a liquid includes a pneumatic drive that incorporates a linear actuator to effect known volume changes in a gas reservoir. The gas reservoir is in fluid communication with a gas-side reservoir that is separated from a fluid-side reservoir by a flexible membrane. Movement of the linear actuator effects positive or negative volume differences on the gas in the gas-side reservoir, resulting in a decrease or increase in pressure of the gas that is transmitted to the fluid-side reservoir to draw fluid, primarily liquid, in from a source or deliver liquid out to a sink. In another aspect, a mechanism is provided for the detection and elimination of air bubbles in the fluid path.

Infusion apparatus with flow indicator

A device for dispensing fluid to a patient and indicating a fluid flow condition. The device includes a reservoir configured to provide a source of fluid under pressure. A continuous flow path in fluid communication with the source of fluid provides a continuous and substantially constant flow rate of fluid from the source to a patient. The device further includes at least one pre-biased indicator in fluid communication with the continuous flow path. The pre-biased indicator is configured to provide a discrete visual signal that the pressure of the fluid in the continuous flow path is different from a predetermined level of pressure, thereby indicating a ...

Pneumatically coupled direct drive fluid control system and process

A fluid control system for delivery of a liquid includes a pneumatic drive that incorporates a linear actuator to effect known volume changes in a gas reservoir. The gas reservoir is in fluid communication with a gas-side reservoir that is separated from a fluid-side reservoir by a flexible membrane. Movement of the linear actuator effects positive or negative volume differences on the gas in the gas-side reservoir, resulting in a decrease or increase in pressure of the gas that is transmitted to the fluid-side reservoir to draw fluid, primarily liquid, in from a source or deliver liquid out to a sink. In another aspect, a mechanism is provided for the detection and elimination of air bubbles in the fluid path.

DETECTION ASSEMBLIES FOR INFUSION PUMPS

Embodiments disclosed herein relate to detection systems for an infusion pump. An occlusion detector for an infusion pump includes a membrane that deforms in response to fluid pressure in a fluid flow path branching off of the main fluid flow path of the infusion pump. The membrane deforms in response to fluid pressure, applying an axial pressure to a piston, which in turn triggers a force sensor. A controller of the infusion pump triggers an alarm or alerts a user when a threshold is reached. A bubble detector for the infusion pump includes a light emitter and reflective surface. Light shines through the fluid flow path, refracting differently if there is air present in the flow path. A light sensor detects the light and conveys an output signal to the controller. If detected air surpasses a threshold, the controller sounds an alarm or otherwise alerts the user.

AN APPARATUS AND A METHOD FOR MONITORING A VASCULAR ACCESS

An apparatus for monitoring a vascular access comprises a dialysis circuit having a venous needle (18) and a blood pump (14) of a peristaltic type which generates oscillatory perturbations in the circuit. An optical sensor (19), arranged on a patient's body by the venous needle, perceives the perturbations transmitted through the needle and sends a pulsating signal to an analysis device (20), absence of which pulsating signal provides an indication of a detachment of the needle.

METHOD AND APPARATUS FOR CHECKING THE CORRECT COUPLING OF ANADDING DEVICE TO A THERAPEUTIC APPLIANCE

The invention relates to a device for checking the correct coupling of a supply device to a therapy device that comprises an extracorporeal circuit t o which the supply device is connected such that a product can be introduced into the extracorporeal circuit by means of the supply device whilst the th erapy device is in operation. The supply device is coupled to the extracorpo real circuit on the suction side of a pump in the extracorporeal circuit. Th e claimed method is characterised in that one section in the low pressure ar ea of the extracorporeal circuit is isolated from the other parts of the ext racorporeal circuit together with one section of the supply device and the p ressure in said isolated section is modified and measured.

RAPID OCCLUSION STEADY STATE PUMPING SYSTEM

An apparatus, method and program product detects an occlusion in a fluid line (22) by determining if a relationship between force measurements departs from an expected relationship.

METHOD AND DEVICES FOR MONITORING FLOW CIRCUITS

A device is provided for monitoring the integrity of a flow circuit in fluid communication with a receptacle. The flow circuit comprises a pumping device for transferring fluid through the flow circuit. The device operates according to a monitoring method in which a pressure signal is received (401) from a pressure sensor, the pressure signal being indicative of fluid pressure in the receptacle or the flow circuit. The pressure signal is then processed (406-407) for detection of a beating signal. The beating signal manifests itself as an amplitude modulation of the pressure signal and is formed by interference between pressure waves generated by a pulse generator associated with the receptacle and pressure waves generated by the pumping device. The integrity of the flow circuit is determined (408-409) based at least partly on the presence or absence of the beating signal. The device and the flow circuit may be part of an apparatus for extracorporeal blood treatment, and the method may be ...

UPSTREAM OCCLUSION DETECTION SYSTEM

A pumping segment of a fluid line alternately in fluid communication with th e upstream and downstream portions of the fluid line connects a fluid supply to a fluid receiver. A pressure sensor located downstream of the segment monitors the pressure during the segment's communication with the upstream and downstream ends. The pressure difference is used to establish a pressure threshold against which the average pressure is compared to determine if an upstream occlusion exists. Should the average pressure fall within a cautionary zone, the pump is reversed to examine the pressure difference once again. Based on the pressure difference during thre reversal, a pressure threshold line may be adjusted thereby adapting to fluid administration conditions. ...

METHOD AND APPARATUS FOR DETECTING TUBE OCCLUSION

A method and apparatus (10) detect occlusion in a tube to a passage into a body cavity. An argon gas supply output (13) received by plural selectable flow orifi ces so one or more of the orifices delivers predetermined metered gas. A duct (16) with a volu me of gas selectively provides metered gas to the passage. The tube connects the passage a nd the duct (16) periodically so a duct (16) pressure transducer (17) can signal. A circuit tests signals of tube equalization with a back pressure. A three way valve controlled by the circ uit connects the duct (16) transducer to gas metered to the cavity. The valve alternatively c onnects the duct (16) transducer to the tube to equalize the tube with metered gas to the back pr essure. A monitor (20) of the signals determines the rate of pressure change after the val ve connection The monitor (20) indicates pressure equalization after a timed interval with a t imer to establish intervals for checking back pressure. The monitor (20) remembers cavity ...

FLUID FLOW RESISTANCE MONITORING SYSTEM

Flow parameters in a fluid delivery assembly are determined by monitoring pressure responses and processing those responses along with information regarding the fluid flow. In one aspect, a processor controls the pump to pump flow quantities in accordance with a pseudorandom code. Portions of the resulting pressure signal sensed at the conduit is averaged, and the averaged values are then decoded in accordance with the pseudorandom code. An estimate of the equilibrium pressure is generated from the decoded average pressure values, while a summation of the pressure samples is generated from the undecoded pressure signals. The resistance to fluid flow of the system is determined from the estimated equilibrium pressure and pressure summation. For low flow rates, a processor controls the pump to pump fluid in a series of fluid boluses, with each fluid bolus delivered in the beginning of a separate timeslot. The equilibrium pressure is measured at the end of each timeslsot, and a summation of ...

FLUID FLOW RESISTANCE MONITORING SYSTEM

Flow parameters in a fluid delivery assembly are determined by monitoring pressure responses and processing those responses along with information regarding the fluid flow. In one aspect, a processor controls the pump to pump flow quantities in accordance with a pseudorandom code. Portions of the resulting pressure signal sensed are then decoded in accordance with pseudorandom code. An estimate of the equilibrium pressure is generated from the decoded pressure values, while a summation of the pressure samples is generated from the undecoded pressure signals. The resistance to fluid flow of the system is determined from the estimated equilibrium pressure and pressure summation. For low flow rates, a processor controls the pump to pump fluid in a series of fluid boluses, with each fluid bolus delivered in the beginning of a separate timeslot. The equilibrium pressure is measured at the end of each timeslot, and summation of the pressure samples is generated from the pressure signals. For ...

회수 및 복귀 디바이스의 구성을 검출하기 위한 방법 및 디바이스

... 피험자의 심장 혈관계에 체외 혈류 회로(20)를 결합하는 회수 및 복귀 디바이스(1, 14, 111, 112, 211, 212, 702, 703, 802, 803)의 구성을 검출하기 위한 디바이스가 배열된다. 디바이스는 체외 혈류 회로(20) 내의 1차 압력 센서(4a, 4b, 4c)에 의해 얻어진 1차 측정 신호를 수신하도록 구성된 신호 프로세서(29)를 포함한다. 디바이스는 심장 혈관계의 피험자 펄스 발생기(3')로부터 기원하는 1차 압력 데이터의 적출을 위한 1차 측정 신호를 처리하도록 더 구성되고, 1차 압력 데이터는 피험자 펄스 발생기(3')로부터 제1 펄스의 적어도 일부를 포함한다. 디바이스는 1차 압력 데이터로부터 파라미터값을 계산하고 파라미터값에 적어도 부분적으로 기초하여 구성을 결정하도록 또한 구성된다.

Compact intravenous fluid delivery system

A compact intravenous fluid delivery system for intravenous injection of fluid into a patient has in one embodiment a spike, for connection to a fluid supply reservoir whose top and bottom define a vertical interval; a fluid metering device for accepting fluid from the reservoir and for displaying the flow of fluid; a fluid cannula for conveying fluid from the spike to the fluid metering device: a fluid delivery tube for conveying the fluid from the metering device to the patient; and a reservoir mounting frame for mounting the fluid supply reservoir in relation to the metering device so that the metering device is substantially contained within the vertical interval defined by the top and bottom of the reservoir. In a preferred embodiment, an intravenous tube having a length greater than 20 cm provides a conduit for passage of fluid from the fluid reservoir to the metering device. The system may include a pump mounted so that the pump and the metering device are both substantially contained ...

Enhanced pressure measurement flow control system

The present invention provides a system for measuring flow of a fluid through a line. In the system, a region of fluid along the line is isolated from pressure effects outside of the region. A source region contains a measurement gas in communication with the isolated region, such that the source means and the isolated region together define a fixed volume, and such that a change in volume of fluid in the isolated region produces a complementary change in the volume of the source means with a resulting change in the pressure of the measurement gas contained in the source region. Further provided is a reservoir in communication with the source means for containing a known volume of measurement gas, and means for pumping measurement gas from the reservoir. The pressure of the measurement gas in the reservoir and the source region is monitored. This pressure data is then analyzed to determine the volume of fluid in the isolated region.

DETECTION ASSEMBLIES FOR INFUSION PUMPS

Embodiments disclosed herein relate to detection systems for an infusion pump. An occlusion detector for an infusion pump includes a membrane that deforms in response to fluid pressure in a fluid flow path branching off of the main fluid flow path of the infusion pump. The membrane deforms in response to fluid pressure, applying an axial pressure to a piston, which in turn triggers a force sensor. A controller of the infusion pump triggers an alarm or alerts a user when a threshold is reached. A bubble detector for the infusion pump includes a light emitter and reflective surface. Light shines through the fluid flow path, refracting differently if there is air present in the flow path. A light sensor detects the light and conveys an output signal to the controller. If detected air surpasses a threshold, the controller sounds an alarm or otherwise alerts the user. 1. An infusion pump , comprising:a pump engine having an inlet and an outlet, the pump engine being configured to drive fluid in a direction from the inlet to the outlet along a first fluid flow path;a membrane that is non-porous;a piston;a second fluid flow path in fluid communication with the first fluid flow path, wherein the second fluid flow path terminates at the membrane;a force sensor; and wherein:', 'a first fluid pressure in the first fluid flow path gives rise to a second fluid pressure in the second fluid flow path,', 'the membrane is exposed to and is configured to deform in response to the second fluid pressure in the second fluid flow path, and', 'the piston is configured to move and to propagate an axial force to the force sensor in response to deformation of the membrane., 'a controller in communication with the force sensor, wherein, in response to deformation of the membrane and piston, the force sensor is configured to send a signal to the controller that reflects fluid pressure experienced in the second fluid flow path,'}2. The infusion pump of claim 1 , wherein at least part of the ...

FLUID FLOW RESISTANCE MONITORING SYSTEM

PROBLEM TO BE SOLVED: To provide a system accurate extending over a wide range of resistance and insensitive to the influence of noise. SOLUTION: A processor controls pump to pump flow quantities in accordance with a pseudorandom code. Portions of the resulting pressure signal sensed are decoded in accordance with the pseudorandom code. An estimated value of equilibrium pressure is generated from the decoded pressure value, while a summation of pressure samples is generated from the undecoded pressure signals. The resistance to fluid flow of the system is determined from the estimated equilibrium pressure value and the pressure summation. For low flow rates, the processor controls the pump to pump fluid in a series of fluid boluses, with each fluid bolus delivered in the beginning of a separate timeslot. COPYRIGHT: (C)2004,JPO ...

УСТРОЙСТВО КОНТРОЛЯ УЧАСТКА ИНФУЗИИ, ОСНОВАННОЕ НА МОДЕЛИ

Группа изобретений относится к медицине. Устройство контроля доставки медикамента содержит пользовательский интерфейс, выполненный с возможностью приема входной информации. Входная информация содержит информацию о пациенте, и/или информацию о медикаменте, и/или информацию об устройстве сосудистого доступа. Датчик выполнен с возможностью измерения скорости изменения давления жидкости в канале доставки жидкости, через который посредством устройства сосудистого доступа доставляется медикамент к области места инфузии пациента. Процессор выполнен с возможностью определения модельного состояния области места инфузии на основе скорости изменения давления в канале доставки жидкости и входной информации. Выходное устройство предоставляет предупреждение, сигнал тревоги и/или графическую/цифровую индикацию состояния, когда установленное модельное состояние области места инфузии и скорость изменения давления жидкости в канале доставки жидкости к области места инфузии указывают на инфильтрацию. Раскрыты ...

СИСТЕМА НАСОСА ДЛЯ ПОДАЧИ ЖИДКОСТИ ИЗ КОНТЕЙНЕРА К ПАЦИЕНТУ И СПОСОБ ПОДАЧИ ЖИДКОСТИ

Изобретение относится к подаче жидкостей пациенту, например лекарств или питательных растворов. Система насоса включает в себя чувствительное средство и контроллер. Чувствительное средство определяет параметр, указывающий давление в капельнице. Контроллер имеет средство вычисления и запоминания для определения отклонения данного параметра от стандарта. Отклонение указывает на ошибку в капельнице. Это позволяет предупредить обслуживающий персонал об опасности. Этими ошибками могут быть неправильная сборка системы или одного из ее элементов, включение в систему неправильного клапана, нарушение целостности капельницы и присутствие в системе воздушных пузырьков. 2 с. и 6 з.п. ф-лы, 3 ил.

УСТРОЙСТВО КОНТРОЛЯ УЧАСТКА ИНФУЗИИ, ОСНОВАННОЕ НА МОДЕЛИ

... 1. Устройство контроля доставки медикамента, содержащее:пользовательский интерфейс, выполненный с возможностью приема входной информации;датчик, выполненный с возможностью измерения множества параметров состояния жидкости в канале доставки жидкости, через который посредством устройства сосудистого доступа (УСД) доставляется медикамент к области места инфузии пациента;процессор, выполненный с возможностью определения модельного состояния области места инфузии на основе множества измеряемых параметров состояния жидкости и входной информации; ивыходное устройство, выполненное с возможностью предоставления сообщения, относящегося к состоянию области места инфузии.2. Устройство по п.1, в котором сообщение, относящееся к состоянию области места инфузии, включает в себя предупреждение, сигнал тревоги и/или графическую/цифровую индикацию состояния, когда установленное модельное состояние области места инфузии и множество параметров состояния жидкости в канале доставки жидкости к области места инфузии ...

System zur schnellen Erkennung von Okklusionen in einer Spritzenpumpe

VERBESSERTER FLUSSMETER MIT DRUCKMESSUNG.

INFUSIONSSYSTEM, METHODOLOGIE UND ALGORITHMUS ZUR IDENTIFIZIERUNG VON PATIENTEN-INDUZIERTEN DRUCKARTEFAKTEN.

AUTOMATISCHES SYSTEM ZUM AUFSPUEREN VON INFILTRATION.

SYSTEM ZUM FESTSTELLEN VON STROMAUFWÄRTS GELEGENEN STRÖMUNGSUNTERBRECHUNGEN

SYSTEM WITH AIR DISTANCE FOR INTRAVENOUS GIVING OF A FLUID

Method and arrangement for detecting the condition of a bloodvessel access

Syringe pump rapid occlusion detection system

Pump system with error detection for clinical nutrition

SYSTEM AND METHOD FOR VERIFYING ALIGNMENT OF DRUG PUMP AND FLUID SUPPLY

A patient care system is configured for infusing fluid to a patient. The system includes a plurality of fluid infusion pumps, each of which is connected to a respective fluid supply for pumping the contents of a fluid supply to a patient via fluid supply lines. The system includes a plurality of pressure sensors each associated with a fluid supply line downstream of the fluid infusion pumps for determining if a particular fluid is connected to a designated infusion pump.

SYRINGE PUMP RAPID OCCLUSION DETECTION SYSTEM

An apparatus, method and program product detects an occlusion in a fluid line (22) by determining if a relationship between force measurements departs from an expected relationship.

FAULT DETECTION APPARATUS FOR PARENTERAL INFUSION SYSTEM

Apparatus and related method for use in a parenteral administration system, for detecting fault conditions such as an infiltration, an open fluid line or an air bubble in the fluid line. The apparatus is particularly adapted for use with a parenteral administration system of the type that includes a pulsing infusion device for incrementally infusing fluid through a fluid tube to a patient's venous or arterial system. The apparatus qualitatively evaluates the pressure in the fluid tube to detect characteristic patterns indicative of each such fault condition and actuates an alarm whenever one is detected.

AUTOMATIC INFILTRATION DETECTION SYSTEM AND METHOD

AUTOMATIC INFILTRATION DETECTION SYSTEM AND METHOD An infusion system for infusing a flowable material into a patient comprising an infusion device for delivering the flowable material in both a normal delivery pattern and a test pulse and a conduit for conducting the flowable material from the infusion device to the patient. The test pulse creates a pressure wave response in the conduit. The pressure wave response is monitored and used to detect if the infiltration has occurred.

OCCLUSION DETECTION FOR INFUSION PUMPS

A system including a tube and a force sensor coupled to a wall of the tube via a restraining element and configured to obtain a value of a tubing force when the tube is deformed by the restraining element. The system includes a processor to determine parameters for fitting a curve including the value of the tubing force, to determine a fluid pressure value for a fluid in the tube based on the parameters for fitting the curve, and to activate an alarm responsive to the fluid pressure value and to the parameters for fitting the curve when an occlusion condition is identified in the tube. The parameters for fitting the curve comprise at least one time-decaying parameter(s) associated to the tubing force. A method for using the system and a non-transitory computer readable medium including instructions to perform the above method are also provided.

INFUSION APPARATUS WITH FLOW INDICATOR

A device for dispensing fluid to a patient and indicating a fluid flow condition. The device includes a reservoir configured to provide a source of fluid under pressure. A continuous flow path in fluid communication with the source of fluid provides a continuous and substantially constant flow rate of fluid from the source to a patient. The device further includes at least one pre-biased indicator in fluid communication with the continuous flow path. The pre-biased indicator is configured to provide a discrete visual signal that the pressure of the fluid in the continuous flow path is different from a predetermined level of pressure, thereby indicating a ...

INFUSION SYSTEM, METHODOLOGY, AND ALGORITHM FOR IDENTIFYING PATIENT-INDUCED PRESSURE ARTIFACTS

FLUID LINE CONDITION DETECTION

IMPEDANCE MONITORING SYSTEM

A medical liquid injector automatic controlling injecting speed by double sensing of pressure and medical liquid injecting method thereof

PURPOSE: An injection speed control type semi-auto medicine injector and a medicine injecting method thereof are provided to stably and smoothly inject medicine into a living body. CONSTITUTION: An injection speed control type semi-auto medicine injector comprises a casing(10), an actuator(20), a driving body(30), an operation button(40), a first pressure sensor(50), a second pressure sensor(60), and a controller(70). The casing has an opened end part into which a fluid vessel is inserted. The actuator is installed in the casing. The driving body is connected to the actuator and moves in a straight line. The operation button is projected from the surface of the casing. COPYRIGHT KIPO 2012 ...

공기를 검출하고 제거하는 공압적으로 결합된 유체 제어 시스템 및 방법

... 액체를 전달하는 유체 제어 시스템은 가스 저장소에 알려진 볼륨 변화를 수행하는 선형 작동체를 포함하는 공압 드라이브를 포함한다. 상기 가스 저장소는 유연한 멤브레인에 의해 유체-측 저장소로부터 분리된 가스-측 저장소와 유체 연통된다. 상기 선형 작동체의 움직임은 상기 가스-측 저장소의 가스에 포지티브 또는 네거티브 볼륨 차이를 수행하여, 상기 유체-측 저장소로 전달되는 가스의 압력을 감소 또는 증가시켜, 유체, 기본적으로 액체를, 소스 또는 전달 액체로부터 싱크로 인입시킨다. 다른 측면에서, 기구는 상기 유체 경로 내 공기 버블을 검출하고 제거하기 위해 제공된다.

dispositivo de monitoramento de entrega de medicamento, método para monitorar a entrega de medicamento e mídia legível por computador

INFUSION SYSTEM AND METHOD OF INTEGRITY TESTING AND LEAK DETECTION

An infusion system is controlled by driving a displacing element (3) in alternate fill and pump directions in a fluid chamber (8) to define a varying displacement volume, and by synchronously operating a valve arrangement (6, 7) to alternately open and close first and second fluid paths (4, 2) from the fluid chamber (8) to a source (5) and a connector (19a), respectively, such that an infusion liquid is repeatedly sucked into the fluid chamber (8) from the source (5) and pumped from the fluid chamber (8) through the connector (19a). The infusion system comprises a sensor (12) for generating a measurement signal representative of fluid pressure in the displacement volume. A controller (11) is connected to intermittently effect a system test, in which the valve arrangement (6, 7) is operated to close the second fluid path (2); the displacing element (3) is driven a given distance in the fill direction; and the measurement signal is obtained from the sensor (12) during at least part of the system test. The integrity of the infusion system is determined based on the measurement signal, e.g. by evaluating the temporal change in the measurement signal during and/or after the displacement. The system test may identify a shortage of infusion liquid in the source (5) or a leakage of air into the first fluid path (4).

METHOD FOR VERIFYING AND/OR MONITORING THE CORRECT FUNCTION OF A SUPPLY DEVICE

The present invention relates to a method for verifying and/or monitoring the correct function of a supply device of a medical apparatus, wherein the medical apparatus comprises an extracorporeal loop to which the supply device is connected such that a medium may be introduced into the extracorporeal loop by means of the supply device, wherein the pressure flow in the extracorporeal loop is measured and analyzed in order to verify and/or monitor the correct function of the supply device. According to the invention, the supply device generates an oscillating pressure flow for this purpose.

Infiltration detection system using pressure measurement

A system is provided for detecting the presence of an infiltration condition in a line delivering fluid to a patient. Stepping means subjects the fluid in the line to a negative pressure step. The pressure of the fluid is monitored, and processing means then determines whether an infiltration condition is present by determining whether the function of line pressure over time in response to the occurrence of a negative pressure step exhibits a relative slow return to the pre-step pressure, such relatively slow return being characteristic of the presence of infiltration.

Determining catheter status

A method for determining the status of a catheter of an implanted infusion system, where the catheter is intended to deliver a fluid composition to CSF of a patient, includes monitoring catheter pressure, developing a pressure modulation profile based on the monitored pressure, and comparing the developed pressure modulation profile to a predetermined pressure profile. The predetermined pressure profile may be a profile of cerebrospinal fluid or a bolus infusion or withdrawal profile for the catheter. A determination of catheter status, such as properly functioning, occluded or leaky, can be made based on the comparison.

Method and device for supervising the supply of substitution fluid during an extracorporeal blood treatment

METHOD AND DEVICES FOR MONITORING FLOW CIRCUITS

VERFAHREN ZUM KONTINUIERLICHEN ÜBERWACHEN DER ARBEITSWEISE EINES AUSGABESYSTEMS UND VORRICHTUNG ZUR DURCHFÜHRUNG DES VERFAHRENS.

PROCEDURE AND DEVICE FOR THE MONITORING OF THE SUPPLY OF SUBSTITUTION LIQUID DURING A EXTRAKORPORALEN A BLOOD TREATMENT

SYSTEM FOR THE IMPEDANCE MONITORING OF A LIQUID FLOW

SYSTEM TO SNAPPING RECOGNITION OF OKKLUSIONEN IN A SYRINGE PUMP

PRINTING INFUSION SYSTEM WITH MEASUREMENT POSSIBILITY OF THE FLUSSWIDERSTANDS DOWNSTREAM

SYSTEM FOR SNAPPING THE RECOGNITION OF OKKLUSIONEN IN A SYRINGE PUMP

System and method for verifying alignment of drug pump and fluid supply

A patient care system is configured for infusing fluid to a patient. The system includes a plurality of fluid infusion pumps, each of which is connected to a respective fluid supply for pumping the contents of a fluid supply to a patient via fluid supply lines. The system includes a plurality of pressure sensor each associated with a fluid supply line downstream of the fluid infusion pumps for determining if a particular fluid is connected to a designated infusion pump.

METHOD FOR MONITORING BOLUS DELIVERY

INFUSION APPARATUS WITH FLOW INDICATOR

A device for dispensing fluid to a patient and indicating a fluid flow condition. The device includes a reservoir configured to provide a source of fluid under pressure. A continuous flow path in fluid communication with the source of fluid provides a continuous and substantially constant flow rate of fluid from the source to a patient. The device further includes at least one pre-biased indicator in fluid communication with the continuous flow path. The pre-biased indicator is configured to provide a discrete visual signal that the pressure of the fluid in the continuous flow path is different from a predetermined level of pressure, thereby indicating a fluid flow condition.

SYRINGE PUMP DETECTION SYSTEM FOR BOLUS APPLICATION

An apparatus, method and program product detects an occlusion in a fluid line (22) by determining if a relationship between force measurements departs from an expected relationship.

SYRINGE PUMP DETECTION SYSTEM FOR BOLUS APPLICATION

An apparatus, method and program product detects an occlusion in a fluid line (22) by determining if a relationship between force measurements departs from an expected relationship.

METHOD AND DEVICE FOR PROCESSING A TIME-DEPENDENT MEASUREMENT SIGNAL

A monitoring device is arranged to receive a time-dependent measurement signal (d(n)) from a pressure sensor in a fluid containing system, which is associated with a first pulse generator and a second pulse generator. The pressure sensor is arranged in the fluid containing system to detect a first pulse originating from the first pulse generator and a second pulse originating from the second pulse generator. The monitoring device is configured to process the measurement signal (d(n)) to remove the first pulse. In this process, the monitoring device receives (201) the measurement signal (d(n)), obtains (202) a first pulse profile (u(n)) which is a predicted temporal signal profile of the first pulse, and filters (203) the measurement signal (d(n)) in the time-domain, using the first pulse profile (u(n)), to essentially eliminate the first pulse while retaining the second pulse. The fluid containing system may include an extracorporeal blood flow circuit, e.g. as part of a dialysis machine ...

PNEUMATICALLY COUPLED FLUID CONTROL SYSTEM AND PROCESS WITH AIR DETECTION AND ELIMINATION

A fluid control system for delivery of a liquid includes a pneumatic drive that incorporates a linear actuator to effect known volume changes in a gas reservoir. The gas reservoir is in fluid communication with a gas-side reservoir that is separated from a fluid-side reservoir by a flexible membrane. Movement of the linear actuator effects positive or negative volume differences on the gas in the gas-side reservoir, resulting in a decrease or increase in pressure of the gas that is transmitted to the fluid-side reservoir to draw fluid, primarily liquid, in from a source or deliver liquid out to a sink. In another aspect, a mechanism is provided for the detection and elimination of air bubbles in the fluid path.

MODEL-BASED INFUSION SITE MONITOR

A medication delivery monitoring device is disclosed. The device includes a user interface configured to receive input information, and a sensor configured to measure a plurality of fluid state parameters of a fluid delivery channel through which the medication is delivered by a vascular access device (VAD) to an infusion site region of the patient. The device also includes a processor configured to determine a state of the infusion site region based on the plurality of measured fluid state parameters and the input information, and an output device configured to provide a communication regarding the state of the infusion site region. Methods and computer-readable mediums for monitoring medication delivery are also disclosed.

APPARATUS FOR DETECTING FLUID LINE OCCLUSION

The apparatus and method for detecting pressure and occlusion in a fluid line is for use with a fluid line being operated upon Say a positive displacement, peristaltic pump having several cam follower fingers pressings against the fluid line sequentially to force fluid through the line peristaltically. A sensor follower finger is mounted to the cam shaft of the pump among the other peristaltic fingers in order to cyclicly press against the fluid line with a certain degree of force and displacement as the cam shaft rotates. The sensor follower finger includes a strain gauge mounted on the sensor finger to generate a signal indicating the degree of force being applied by the sensor finger against the tubing, and a signal processor unit which receives this force signal and determines the pressure within the fluid line used upon the signal. The signal processor compares the measured pressure with an upstream reference value during an upstream pressure measurement mode, and compares the measured ...

METHOD AND SYSTEM FOR UPSTREAM OCCLUSION DETECTION

The method and system for detecting occlusion in a fluid line upstream of a pump concerns a fluid pump with a pump cycle in which the upstream pressure of the fluid line is communicated to the downstream portion of the fluid line. A pressure sensor located downstream of the pump is capable of measuring a relatively large negative-going pressure in the fluid line. A signal is generated to indicate occlusion based upon detection of negative-going pressure.

MONITORING CONDITIONS OF IMPLANTABLE MEDICAL FLUID DELIVERY DEVICE

A programmer device includes an interface that communicates with an implantable fluid delivery device and a user interface that allows a user to troubleshoot a catheter connected to the fluid delivery device by measuring a pressure associated with the catheter. A processor may compare the measured pressure waveform to a previously-acquired waveform or the user interface may display the measured pressure waveform for the user to compare the displayed pressure waveform to a previously-acquired baseline waveform. The comparison between the two waveforms may be based on the pressure decay time. A historical log of measured pressure decays associated with the catheter may be maintained by the programmer device or the implantable fluid delivery device and displayed for the user to determine whether the performance of the catheter is deteriorating.

DOSING DEVICE FOR AN INFUSION SYSTEM AND METHOD THEREOF

A dosing device for an infusion system comprises a dosing unit having a variable volume and at least one opening in fluid connection with the variable volume, through which opening the variable volume can be filled with a substance or the substance can be dispensed from the variable volume. The dosing device is operable in a first state for filling the substance from a supply conduit, in a second state for preventing filling and dispensing, or in a third state for dispensing through a dispensing conduit. No direct fluid connection exists between the supply conduit and the dispensing conduit at any time. Methods for dosing a substance with the dosing device.

Medicine delivery device having detachable pressure sensing unit

A fluid medicament delivery device includes a patient attachment unit and a separate indicator unit. The patient attachment unit includes a housing and a fluid channel located therein, wherein at least a portion of the fluid channel includes a flexible member substantially coterminous with the housing. The separate indicator unit is adapted to be detachably coupled to the housing of the patient attachment unit and includes a first sensing element for contacting the flexible member when the indicator unit is coupled to the housing to sense a flexure of the flexible member.

DEVICE FOR ADMINISTERING AN INFUSION OR TRANSFUSION, SYSTEM COMPRISING SUCH A DEVICE, AND METHOD FOR CONTROLLING SUCH A DEVICE

A device for administering an infusion or transfusion of liquid from a container includes a pump for pumping liquid to a patient connection via a conduit having a liquid-retaining filter membrane. The device also includes a pressure measuring device for acquiring measurement values corresponding to a pump-inlet-side pressure, and a control device for detecting a change in the pump-inlet-side pressure based on the measurement values. The control device determines, based on the change in the pump-inlet-side pressure, whether to stop pumping. The control device also generates a control signal when the pumping is to be stopped. Moreover, the control device emits, based on the control signal, a communication signal to a data connection between the device and a unit that reads the communication signal. In addition, or in the alternative, the control device switches the device from a first state to a second state based on the control signal.

UPSTREAM OCCLUSION DETECTION SYSTEM

PERISTALTIC PUMP FOR PUMPING A LIQUID AND METHOD FOR OPERATING A PERISTALTIC PUMP

FLUID FLOW RESISTANCE MONITORING SYSTEM

Flow parameters in a fluid delivery assembly are determined by monitoring pressure responses and processing those responses along with information regarding the fluid flow. In one aspect, a processor controls the pump to pump flow quantities in accordance with a pseudorandom code. Portions of the resulting pressure signal sensed at the conduit is averaged, and the averaged values are then decoded in accordance with the pseudorandom code. An estimate of the equilibrium pressure is generated from the decoded average pressure values, while a summation of the pressure samples is generated from the undecoded pressure signals. The resistance to fluid flow of the system is determined from the estimated equilibrium pressure and pressure summation. For low flow rates, a processor controls the pump to pump fluid in a series of fluid boluses, with each fluid bolus delivered in the beginning of a separate timeslot. The equilibrium pressure is measured at the end of each timeslsot, and a summation of ...

VERFAHREN ZUM KONTINUIERLICHEN ÜBERWACHEN DER ARBEITSWEISE EINES AUSGABESYSTEMS UND VORRICHTUNG ZUR DURCHFÜHRUNG DES VERFAHRENS.

A method and apparatus

MECHANISM TO �BERWACHUNG the SUPPLY OF SUBSTITUTIONSFL�SSIGKEIT W�HREND a EXTRAKORPORALEN a BLOOD TREATMENT

SYSTEM FOR SNAPPING THE RECOGNITION OF OKKLUSIONEN IN A SYRINGE PUMP

METHOD AND DEVICE FOR THE RECORDING OF THE CONDITION OF A BLOOD VESSEL ENTRANCE

SYSTEM FOR IMPEDANCE MONITORING

SYSTEM FOR THE DETERMINATION FROM LYING FLOW INTERRUPTIONS UPSTREAM

Positive pressure infusion system having downstream resistance measurement capability

Model-based infusion site monitor

An apparatus and a method for monitoring a vascular access

An apparatus for monitoring a vascular access comprises a dialysis circuit having a venous needle (18) and a blood pump (14) of a peristaltic type which generates oscillatory perturbations in the circuit. An optical sensor (19), arranged on a patient's body by the venous needle, perceives the perturbations transmitted through the needle and sends a pulsating signal to an analysis device (20), absence of which pulsating signal provides an indication of a detachment of the needle.

PRESSURE INDICATOR FOR MEDICAMENT DELIVERY DEVICE

A medicament delivery device having a reservoir for holding a medicament, a pressurizing system that dispenses the medicament from the reservoir when operating, a hollow cannula for insertion into a patient, and a fluid delivery path disposed between the pressurizing system and the hollow cannula and communicating the medicament therebetween. The medicament delivery device also has a pressure sensor external to the pressurizing system, sensing a back pressure in the fluid delivery path, and providing an indication when the back pressure drops below a predetermined threshold after the pressurizing system ceases operation.

FLOW CONTROL SYSTEM USING BOYLE'S LAW

A system is provided for controlling fluid flow, particularly from a reservoir to a patient. A dispensing device isolates a region of a first fluid in a line from the effects of pressure in the line outside of the region. Increments of the first fluid are repetitively dispensed into and out of the region, as a result of which pressure changes occur in the first fluid in the region. These pressure changes are measured. A measurement fluid in a housing is so related to the region that a change in the measurement fluid pressure causes a change in the first fluid pressure in the region. Predetermined volume increments of measurement fluid are repetitively displaced by a displacement device. A control device which is in communication with the pressure measurement device, the displacement device and the dispensing device causes the dispensing device to dispense first fluid in increments that are calibrated by the displacement device and monitored by the pressure measurement device.

INFUSION PUMP WITH TUBE LOADING GUIDANCE AND CONFIRMATION

An infusion pump includes a housing with a door pivotally mounted to the housing, a tube channel on the housing configured to hold a tube in the infusion pump, a pumping mechanism including a shuttle, and a slide clamp ejection device.

INFUSION TUBING TRACING SYSTEM USING VIBRATION GENERATOR AND VIBRATION SENSOR

A system for tracing tubing which forms a conduit from a source of infusion liquid to a patient by way of an infusion pump has a vibration generator manually operable by a user to generate vibrations at an origin location along the tubing, wherein the vibrations are propagated by the tubing and have a vibration signature. A vibration sensor arranged at a destination location along the tubing receives the vibrations and generates a digital vibration signal. Signal processing circuitry connected to the vibration sensor processes and evaluates the digital vibration signal to determine a trace status of the tubing between the vibration generator and the vibration sensor. An indicator connected to the signal processing circuitry provides an indication of the determined trace status. Trace status possibilities include clear, cross-over, and null. A likely number of cross-overs may also be indicated.

SYSTEM AND METHOD FOR VERIFYING ALIGNMENT OF DRUG PUMP AND FLUID SUPPLY

A patient care system is configured for infusing fluid to a patient. The system includes a plurality of fluid infusion pumps, each of which is connected to a respective fluid supply for pumping the contents of a fluid supply to a patient via fluid supply lines. The system includes a plurality of pressure sensor each associated with a fluid supply line downstream of the fluid infusion pumps for determining if a particular fluid is connected to a designated infusion pump.

DRUG DELIVERY DEVICE AND METHOD

A drug delivery device includes a pressurized reservoir in communication wit h a flow path to an outlet. The flow path includes two normally-closed valves and a flow restriction. A pressure measurement arrangement measures a differential fluid pressure between two points along the flow path which spa n at least part of the flow restriction, one of the points being between the valves. A controller selectively opens the valves to deliver a defined quantity of the liquid medicament to the outlet.

DRUG DELIVERY DEVICE AND METHOD

METHOD AND APPARATUS FOR CHECKING THE CORRECT COUPLING OF AN ADDING DEVICE TO A THERAPEUTIC APPLIANCE

The invention relates to a device for checking the correct coupling of a supply device to a therapy device that comprises an extracorporeal circuit to which the supply device is connected such that a product can be introduced into the extracorporeal circuit by means of the supply device whilst the therapy device is in operation. The supply device is coupled to the extracorporeal circuit on the suction side of a pump in the extracorporeal circuit. The claimed method is characterised in that one section in the low pressure area of the extracorporeal circuit is isolated from the other parts of the extracorporeal circuit together with one section of the supply device and the pressure in said isolated section is modified and measured.

RAPID OCCLUSION STEADY STATE PUMPING SYSTEM

An apparatus, method and program product detects an occlusion in a fluid line (22) by determining if a relationship between force measurements departs from an expected relationship.

Automated catheter length determination for implantable fluid delivery device

Disclosed are methods and systems for automatically estimating the length of an implantable catheter by measuring the pressure decay response to pumping fluid through the catheter. The decay time for a unit fluid pressure pulse generated within the catheter is proportional to the catheter length, i.e. as the catheter length increases so does the decay time. The catheter length can therefore be estimated based on, e.g., the decay time of the pressure pulse. The estimated catheter length can also be analyzed to determine if it is representative of the actual catheter length, or, e.g., is affected by one or more catheter malfunctions including cuts and occlusions. Systems for automatically estimating the catheter length include an implantable catheter, a pumping mechanism, a pressure sensor configured to measure pressure within the catheter, and a processor that calculates the catheter length from a pressure pulse measured while delivering fluid through the catheter.

Hemodynamic pressure sensor test system and method

A pressure sensor suitable for use in a powered contrast injector system may be tested to help validate the operability and/or integrity of the sensor. In some examples, the pressure sensor may be tested by generating a pressure pulse in a fluid line fluidly connected to the pressure sensor so as to generate a first pressure reading. A high pressure fluid at a pressure above a maximum operating pressure of the pressure sensor may be conveyed through a valve fluidly connected to the pressure sensor. Subsequent to conveying the high pressure fluid through the valve, the pressure sensor may again be tested by generating a pressure pulse in the fluid line fluidly connected to the pressure sensor so as to generate a second pressure reading. In some examples, the first pressure reading is compared to the second pressure reading to determine whether the pressure sensor has passed or failed.

PUMP AND MONITOR FOR IV PRESSURE INFUSERS

A pumping device that can be used with currently-available pressure bag infusers is disclosed. The pumping device is hand-held and lightweight. The device is controlled by a microprocessor. Thus constant pressure to the bag is maintained through automatic adjustment of pumping and venting functions. In addition, a novel, new pressure bag infuser and a modified Luer Lock fitting for use with the pumping device are described. 1. A pumping device , comprising:a housing;a coupler attached to the housing, the coupler configured to attach with an airtight connection to a pressure vessel;an electric air pump in the housing, the pump in pneumatic communication with the pressure vessel;a first pressure sensor in pneumatic communication with the pressure vessel;an electronic valve in pneumatic communication with the pressure vessel;a signaling element;a microprocessor in electronic communication with the pump, the first pressure sensor, the valve, and the signaling element;a power source supplying power to the device; anda switch in communication with the power source and optionally, with the microprocessor.2. The pumping device of further comprising a second pressure sensor in pneumatic communication with the outside environment claim 1 , the second pressure sensor in electronic communication with the microprocessor.3. The pumping device of wherein the housing has a size that is no more than about 20 cm in length and no more than about 6 cm in width.4. The pumping device of wherein the housing comprises metal or plastic.5. The pumping device of wherein the housing is sealed except at the coupler and at intake or exhaust ports.6. The pumping device of wherein the pressure vessel is an airtight bag.7. The pumping device of wherein the airtight bag is configured to be positioned around an IV bag.8. The pumping device of wherein the airtight bag is an integral part of an IV bag.9. The pumping device of wherein the coupler comprises a modified male Luer Lock fitting that is ...

Apparatus for Infusing Fluid

A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen. 1. A pump for pumping fluid , the pump comprising:a tube platen;an plunger configured for actuation toward and away from the tube platen when the tube platen is disposed opposite to the plunger;a bias member configured to urge the plunger toward the tube platen;an inlet valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position;an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position;an actuator mechanism configured to control the actuation of the plunger, the inlet valve and the outlet valve;a position sensor configured to estimate a position of the plunger; anda processor coupled to the position sensor to receive the estimated position of the plunger therefrom, wherein the processor is configured to detect an anomaly based in part on the estimated plunger position when the inlet valve is in the occluding position and the outlet valve is in the occluding position.2. The pump according to claim 1 , wherein the processor is configured to detect a leak based on a rate of change of the estimated position of the plunger.3. The pump according to claim 1 , the pump further comprising an ultrasonic sensor sensitive to gas in an infusion tube claim 1 , the ultrasonic sensor located downstream of the plunger and configured communicate with the processor claim 1 , wherein the processor is configured to distinguish between an upstream occlusion and a presence of air in the fluid using the ultrasonic sensor.4. The pump according to claim 1 ...

PRESSURE INDEPENDENT DELIVERY METHOD FOR PORTABLE INFUSION PUMP

Described is method for maintaining proper drug delivery rate by monitoring atmospheric effects on a drug infusion device. The device may include one or more vents that permit the passage of gas between the exterior and interior of the device's housing. The device may also include one or more pressure and/or temperature sensors, the readings from which may be used to determine malfunctions in the venting of the device and/or changes in pressure that could cause the unintended over-delivery or under-delivery of medication. 1providing a portable, external pumping device comprising a housing having two or more interior compartments therein, a cavity within the housing for receiving a drug reservoir, a processor, a memory in communication with the processor, a display device controlled by the processor, one or more indicator devices controlled by the processor, a user input device in communication with the processor, a drug delivery program stored within the memory, a motor drive controlled by the processor configured to drive a plunger and expel fluid from the drug reservoir, at least one external vent permitting passage of gas between the interior and exterior of the housing, at least one internal vent permitting passage of gas between the two or more interior compartments, at least one temperature sensor located in the interior of the housing, and two or more absolute pressure sensors;sensing a temperature within the housing;sensing a first pressure;sensing a second pressure;determining based on the first pressure, the second pressure, and the temperature an atmospheric correction factor;applying the atmospheric correction factor;modifying the drug delivery program; andcontrolling the motor drive to deliver insulin in accordance with the modified drug delivery program.. A method for regulating drug delivery, comprising: This application relates to U.S. patent application Ser. No. 61/660,251, filed Jun. 15, 2012; all applications are herein incorporated by reference ...

SYRINGE PUMP RAPID OCCLUSION DETECTION SYSTEM

An apparatus and method for detecting an occlusion in a downstream fluid line of a medical pump in relation to increased pressure in the downstream fluid line between the beginning and the end of each interval of a series of intervals of operation of the pump even if one or more intervals between the first and last intervals does not reflect such an increase in pressure in the downstream fluid line. 1. A method of automatically detecting an occlusion in a downstream fluid line of a medical pumping system , the downstream fluid line being configured to carry fluid under pressure between a fluid source and a patient , the method comprising:initiating a pumping sequence to cause the fluid to flow into the downstream fluid line with the patient at an elevation;during the pumping sequence, using a sensor to determine a first force value indicative of force in the fluid line at a first time;during the pumping sequence, determining a second force value indicative of force in the fluid line at a second time; andproviding an indication of the occlusion if a relationship between the first and second force values departs from an expected relationship unless the relationship departs from an expected relationship as a result of a change in elevation of the patient.2. A medical pumping system for pumping fluid under pressure through a downstream fluid line being configured to carry fluid under pressure between a fluid source and a patient at an elevation , the system comprising:a pump configured to force fluid from a fluid source under pressure into a downstream fluid line;a sensor for determining a first force value indicative of the force in said downstream fluid line at a first time, and second force value indicative of the force in said downstream fluid line at a second time;a processor in communication with the pump, the processor being configured to execute program code that operates the pump to force fluid under pressure in said downstream fluid line; andwherein the ...

INFUSION STATE DETECTION SYSTEM

An infusion state detection system includes: a pump unit configured to deliver a liquid in an infusion line; a pressure detector configured to detect a pressure in the infusion line; and a determination processing unit configured to: when the pressure detected by the pressure detector is at a predetermined value or above, stop driving of the pump unit for a stop period, and determine an infusion state on the basis of a value of the pressure detected by the pressure detector during the stop period. 1. An infusion state detection system comprising:a pump unit configured to deliver a liquid in an infusion line;a pressure detector configured to detect a pressure in the infusion line; and when the pressure detected by the pressure detector is at a predetermined value or above, stop driving of the pump unit for a stop period, and', 'determine an infusion state on the basis of a value of the pressure detected by the pressure detector during the stop period., 'a determination processing unit configured to2. The infusion state detection system according to claim 1 , determine a time period, from commencement of the stop period, at which the pressure in the infusion line during the stop period is at a predetermined ratio of the predetermined first value or below, and', 'determine that the leakage of the liquid to an outside of a living body lumen has occurred when the determined time period is a predetermined time period threshold or below., 'wherein the determination processing unit is configured to3. The infusion state detection system according to claim 1 , determine a value of the pressure in the infusion line at a time when a predetermined time period threshold has passed from commencement of the stop period, and', 'determine that leakage of the liquid to an outside of a living body lumen has occurred when the value at said time is at a predetermined threshold value or below., 'wherein the determination processing unit is configured to4. The infusion state detection ...

Fluid line occlusion detection system and methods

The systems, methods and articles described herein are directed to at least one pressure sensor along a downstream fluid line which senses fluid pressure and assists an occlusion detection feature in determining the presence of occlusions in the downstream fluid line. In addition, the system can dynamically adapt the occlusion detection feature based on a delivery of fluid, such as a bolus, in order to prevent the system from creating a false alarm regarding an occlusion of the downstream fluid line.

System and method for detecting occlusions in a medication infusion system using pulsewise pressure signals

A medical fluid communication system is disclosed comprising a pump controller and a fluid detector. The fluid detector detects characteristics of the fluid and provides fluid measurements to the pump controller, which detects if the fluid is flowing in the medication delivery system. In the event fluid is not flowing due to an occlusion, the pump controller may attempt to resolve the occlusion or may provide a warning to a user that an occlusion is occurring.

SYSTEM AND METHOD FOR DETECTING OCCLUSIONS IN A MEDICATION INFUSION SYSTEM USING PULSEWISE PRESSURE SIGNALS

A medical fluid communication system is disclosed comprising a pump controller and a fluid detector. The fluid detector detects characteristics of the fluid and provides fluid measurements to the pump controller, which detects if the fluid is flowing in the medication delivery system. In the event fluid is not flowing due to an occlusion, the pump controller may attempt to resolve the occlusion or may provide a warning to a user that an occlusion is occurring. 1. A medication infusion system comprising:a pump controller for providing medication fluid to a patient via a fluid path connected between a fluid reservoir of the pump controller and a patient; andan in-line fluid detector for measuring pressure of the medication fluid in the fluid path and transmitting the measured pressure to the pump controller,wherein the pump controller determines if a flow of the medication fluid is successful or unsuccessful based on the pressure measurements in a current interval.2. The system of claim 11 , wherein the pump controller determines if a flow of the medication fluid is successful or unsuccessful further comprises:calculating a minimum pressure of the current interval; andcomparing a minimum pressure of the current interval to a predetermined threshold pressure,wherein the flow of the medication fluid is not successful if the minimum pressure exceeds the predetermined threshold.3. The system of claim 11 , wherein the pump controller determines if a flow of the medication fluid is successful or unsuccessful further comprises:calculating a minimum pressure of the current interval; andcomparing the minimum pressure of the current interval to pressure data of a previous interval,wherein the flow of the medication fluid is not successful if the minimum pressure exceeds the pressure data of the previous interval.413. The system of claim claim 11 , wherein the pressure data of the previous interval is based on a calculation of a peak pressure of the previous interval and a ...

APPARATUS FOR INFUSING FLUID

A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen. 1. A system for pumping , comprising:a plunger configured to move toward and away from a tube;a spring configured to bias the plunger toward the tube;an actuator configured to cause the plunger to move away from the tube, wherein the actuator is further configured to mechanically disengage from the plunger;a position sensor configured to sense a position of the plunger; estimate fluid flow within the tube using the sensed position of the plunger,', 'log an infusion of fluid to generate at least one infusion log, and', 'interact with an intercommunication task within the real-time processor to communicate the log; and, 'a real-time processor in operative communication with the position sensor to receive the sensed position of the plunger, wherein the real-time processor is configured to receive the log via an intercommunication process,', 'store the log in a database, and', 'communicate the log via a device gateway communication manager., 'a user-interface processor configured to2. The system according to claim 1 , wherein a communication between the intercommunication task and the intercommunication process is asynchronous.3. The system according to claim 1 , wherein the user-interface processor is further configured to execute an infusion manager process to control the infusion of fluid.4. The system according to claim 3 , wherein the user-interface processor is further configured to select a Drug Administration Library entry to validate the infusion of fluid.5. The system according to claim 3 , wherein the user-interface processor is further ...

VENTED RESERVOIR FOR MEDICAL PUMP

The present invention concerns a medical pump comprising: a. A hard housing comprising a top () and bottom () hard shells, within which a rigid wall () and a movable membrane () create three distinct chambers; wherein i. said movable membrane tightly separates said second () and third () chambers ii. said first and third chambers have a watertight interface iii. said second chamber () is designed to contain a fluid iv. said first chamber () comprises a first venting mean () which is arranged to provide a fluidic communication between said first chamber () and the external environment; v. said third chamber () comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber () and the external environment b. A pumping element () located in the first chamber () c. A least one pressure sensor which measure the pressure gradient between the first chamber () and the second chamber () d. A fluid pathway which permits: i. a first fluid connection () between said second chamber () and said pumping element ii. a second fluid connection () between said pumping element and a patient line (). 1. Medical pump comprising: i. said movable membrane tightly separates said second and third chambers', 'ii. said first and third chambers have a watertight interface', 'iii. said second chamber is designed to contain a fluid', 'iv. said first chamber comprises a first venting mean which is arranged to provide a fluidic communication between said first chamber and the external environment;', 'v. said third chamber comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber and the external environment, 'a. A hard housing comprising a top and bottom hard shells, within which a rigid wall and a movable membrane create three distinct chambers; wherein'}b. A pumping element located in the first chamberc. A least one pressure sensor which measure the pressure gradient between the first chamber and ...

VENTED RESERVOIR FOR MEDICAL PUMP

The present invention concerns a medical pump comprising: a. A hard housing comprising a tap () and bottom () hard shells, within which a rigid wall () and a movable membrane () create three distinct chambers; wherein i. said movable membrane tightly separates said second () and third () chambers ii. said first and third chambers have a watertight interface iii. said second chamber () is designed to contain a fluid iv. said first chamber () comprises a first venting mean () which is arranged to provide a fluidic communication between said first chamber () and the external environment; v. said third chamber () comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber () and the external environment b. A pumping element () located in the first chamber () c. A least one pressure sensor which measure the pressure gradient between the first chamber () and the second chamber () d. A fluid pathway which permits: i. a first fluid connection () between said second chamber () and said pumping element ii. a second fluid connection () between said pumping element and a patient line (). 125-. (canceled)26. A delivery medical device comprising:a hard housing having a bottom hard shell and a top hard shell, the hard shell housing including a first chamber, a second chamber intended to store a fluid to be delivered to a patient, and a third chamber separated by at least a movable membrane and a rigid wall, wherein the second chamber and the third chamber are tightly separated by the movable membrane and the first chamber and the third chamber have a watertight interface;a fluid pathway configured to provide a fluid communication between the second chamber and the patient;a pumping device configured to convey the fluid through the fluid pathway to the patient;a vent device configured to vent at least one of the first chamber and the third chamber to the external environment of the delivery medical device; andan energy source for ...

Cardiovascular state monitoring - drug delivery apparatus and method of use thereof

The invention comprises a cardiovascular state monitoring apparatus and a method for operating a drug delivery system, comprising the steps of: (1) receiving to the cardiovascular state monitoring/drug delivery system a first time-varying cardiovascular input waveform from at least one of: a pulse oximeter and a blood pressure monitor; (2) operating on the time-varying cardiovascular input waveform to generate transient cardiovascular state information, comprising at least one of: a current left ventricle stroke volume, a current blood pressure, a current arterial compliance, and a current blood flow rate; and (3) directing the drug delivery system to deliver a drug based on the generated transient cardiovascular state information.

FLUID CONTROL SYSTEM AND DISPOSABLE ASSEMBLY

A system for controlled delivery of medicinal fluid includes a fluid pathway assembly defining a fluid pathway and including means for calculating a first calculated fluid flow rate using gas laws. The fluid pathway assembly has an inline flow sensor element received within the fluid pathway movable in response to fluid flowing in the fluid pathway. A flow control device is removably attached to the fluid pathway assembly and has a sensor for sensing a position of the inline flow sensor element in the fluid pathway, the position of the inline flow sensor element being representative of a second calculated fluid flow rate. The fluid pathway assembly includes a variable flow resistor adjustable to regulate a rate of fluid flow in the fluid pathway assembly. A drive mechanism attached to the flow control device is operably coupled to the variable flow resistor when the flow control device is attached to the fluid pathway assembly. The variable flow resistor is adjustable by the drive mechanism to achieve a target flow rate when the first calculated flow rate and/or the second calculated flow rate differs from the target flow rate. 1. A fluid delivery system comprising:a fluid delivery assembly including an inlet, an outlet, a pneumatic pump, a fluid flow resistor, and a fluid pathway, the fluid pathway extending between the inlet and the outlet, the fluid flow resistor disposed in the fluid pathway;a pressure sensor to monitor a pressure of gas applied to operate the pneumatic pump that pumps fluid through the fluid pathway from the inlet to the outlet; anda controller to control a flow rate of the fluid through the fluid pathway based at least in part on the pressure of the gas as sensed by the pressure sensor and a setting of the fluid flow resistor, the controller controlling the flow rate of the fluid based on the pressure of the gas as sensed by the pressure sensor.2. The fluid delivery system as in claim 1 , wherein the controller operates the pneumatic pump to ...

Modulated Drug Delivery

A method of delivering a therapeutic and/or diagnostic agent to tissue is provided including the steps of inserting a catheter into a bodily cavity, the catheter having a proximal balloon and a distal balloon, inflating the proximal and distal balloons to create a chamber between the proximal and distal balloons, delivering the therapeutic and/or diagnostic agent to the chamber, measuring fluid pressure in the chamber, measuring at least one fluid dynamic characteristic of a subject, and adjusting the delivery of the therapeutic and/or diagnostic agent based at least in part on the measured volumetric pressure in the chamber and the at least one fluid dynamic characteristic of the subject. 1. A method of delivering a therapeutic and/or diagnostic agent to tissue , comprising the steps of:inserting a catheter into a bodily cavity, said catheter comprising a proximal balloon and a distal balloon;inflating the proximal and distal balloons to create a chamber between the proximal and distal balloons;delivering the therapeutic and/or diagnostic agent to said chamber;measuring fluid pressure in said chamber;measuring at least one fluid dynamic characteristic of a subject; andadjusting the delivery of the therapeutic and/or diagnostic agent based at least in part on said measured fluid pressure in said chamber and said at least one fluid dynamic characteristic of the subject.2. The method of claim 1 , wherein said at least one fluid dynamic characteristic of the subject is measured via at least one sensor positioned on the subject.3. The method of claim 1 , wherein said at least one fluid dynamic characteristic of the subject comprises at least one of diastolic pressure and systolic pressure.4. The method of claim 1 , wherein said at least one fluid dynamic characteristic of the subject comprises at least one of a lymphatic fluid dynamic characteristic claim 1 , a blood dynamic characteristic claim 1 , a cerebrospinal fluid dynamic characteristic claim 1 , an interstitial ...

EXTRAVASATION DETECTION APPARATUS AND METHODS

Described herein is an extravasation tester that pinches an infusion line closed between a wheel and a platen, and then peristaltically withdraws fluid into the infusion line as the wheel is rolled away from a puncture site. Extravasation is determined to have occurred if little or no blood appears in a sight chamber positioned near the puncture site when a test fluid is withdrawn into the infusion line from the puncture site. 1. An extravasation tester , comprising:a frame having a hollow bore for receiving an intravenous infusion delivery tube;a platen on an inner surface of the hollow bore;a manually rotatable wheel having a circumferential outer surface and opposing axial posts; andopposing slots in the frame for receiving the opposing axial posts of the wheel so that the wheel is rotatable about its axis and translatable along the slots in the frame; (a) when the wheel is in a free-flow region of the frame, the outer surface of the wheel does not pinch the delivery tube closed against the platen,', '(b) when the wheel is in a tube-pinching region of the frame, the outer surface of the wheel pinches the delivery tube closed against the platen, and', '(c) when the wheel is rolled on the delivery tube in the tube-pinching region of the frame, the point of tube closure moves along the delivery tube with the wheel., 'wherein the slots and the surfaces of the hollow bore are configured so that2. A method of performing an extravasation test , comprising the steps of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'providing the extravasation tester of ;'}rolling or sliding the wheel out of the free-flow region and into the tube-pinching region, thereby closing the delivery tube between the wheel and the platen;rolling the wheel on the delivery tube away from a puncture site, thereby withdrawing a test fluid from the puncture site and into a sight chamber; and (a) if a substantial concentration of blood is present in the sight chamber within or upon completion of the ...

DOSING DEVICE FOR AN INFUSION SYSTEM AND METHOD THEREOF

A dosing device for an infusion system comprises a dosing unit having a variable volume and at least one opening in fluid connection with the variable volume, through which opening the variable volume can be filled with a substance or the substance can be dispensed from the variable volume. The dosing device is operable in a first state for filling the substance from a supply conduit, in a second state for preventing filling and dispensing, or in a third state for dispensing through a dispensing conduit. No direct fluid connection exists between the supply conduit and the dispensing conduit at any time. Methods for dosing a substance with the dosing device. 2. The dosing device of claim 1 , wherein:the dosing unit is configured as a cylinder; andthe supply opening and the dispensing opening are disposed on the cylinder.3. The dosing device of claim 2 , wherein the supply opening and the dispensing opening are disposed on one side of the cylinder.4. The dosing device of claim 2 , wherein the cylinder comprises a piston claim 2 , the piston being movable in the cylinder to cause an increase or decrease in the volume of the variable volume.5. The dosing device of claim 1 , further comprising a supply conduit connected to the supply opening and a dispensing conduit connected to the dispensing opening claim 1 , such that the variable volume is in fluid connection with the supply conduit when the dosing unit is in the first state claim 1 , that the variable volume is in fluid connection with the dispensing conduit when the dosing unit is in the third state claim 1 , and that the supply conduit is never in fluid connection with the dispensing conduit.6. The dosing device of claim 5 , further comprising at least one valve claim 5 , the at least one valve being disposed in the dosing unit claim 5 , in the supply opening claim 5 , in the dispensing opening claim 5 , on the supply conduit claim 5 , or on the dispensing conduit.7. The dosing device of claim 6 , wherein the at ...

APPARATUS FOR INFUSING FLUID

A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen. 1. A pump for pumping fluid , the pump comprising:a tube platen;a plunger configured for actuation toward and away from the tube platen when the tube platen is disposed opposite to the plunger;a bias member configured to urge the plunger toward the tube platen;an inlet valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position;an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position;an actuator mechanism configured to control the actuation of the plunger, the inlet valve and the outlet valve, wherein the actuator mechanism is configured to mechanically engage and disengage from the plunger to pump fluid toward a patient, wherein when the actuator mechanism is disengaged from the plunger, the actuator mechanism is configured to mechanically discharge the bias member such that the bias member acting upon the plunger is a sole force driving the plunger toward the tube platen, wherein the actuator mechanism is configured to engage the plunger to lift the plunger away from the tube platen to thereby mechanically charge the bias member, wherein the actuator mechanism comprises a cam shaft and a plunger cam coupled to the cam shaft configured to actuate the plunger;a pressure sensor disposed adjacent to at least one of the inlet valve, the outlet valve, and the plunger;a position sensor configured to estimate a position of the plunger; and the inlet valve is in the occluding position,', 'the outlet valve is in the occluding position ...

Dosing device for an infusion system and method thereof

A dosing device for an infusion system comprises a dosing unit having a variable volume and at least one opening in fluid connection with the variable volume, through which opening the variable volume can be filled with a substance or the substance can be dispensed from the variable volume. The dosing device is operable in a first state for filling the substance from a supply conduit, in a second state for preventing filling and dispensing, or in a third state for dispensing through a dispensing conduit. No direct fluid connection exists between the supply conduit and the dispensing conduit at any time. Methods for dosing a substance with the dosing device.

PUMP AND MONITOR FOR IV PRESSURE BAG INFUSERS

A pumping device that can be used with currently-available pressure bag infusers is disclosed. The pumping device is hand-held and lightweight. The device is controlled by a microprocessor. Thus constant pressure to the bag is maintained through automatic adjustment of pumping and venting functions. In addition, a novel, new pressure bag infuser and a modified Luer Lock fitting for use with the pumping device are described. 1. (canceled)2. A method of performing a rapid fluid infusion with a patient , comprising:Securing a bag containing a rapid infusion fluid adjacent to an inflatable portion of an inflatable infuser bag;Forming an airtight seal between an inflatable infuser bag coupling and a coupling of a rapid infusion pump;Initiating a rapid fluid infusion sequence using the rapid infusion pump;Detecting and providing to a microprocessor of the rapid infusion pump an initial pressure of the inflatable infuser bag;Detecting and sending to the microprocessor an atmospheric pressure of an environment external to the inflatable infuser bag;Operating an air pump under the control of the microprocessor to deliver air through the airtight seal to maintain a pressure in the inflatable infuser bag within a predetermined pressure range; andDelivering the rapid infusion fluid within the bag to the patient in response to the maintained pressure in the inflatable infuser bag.3. The method of wherein during the delivering step a portion of short edge of a first end of the bag containing the rapid infusion fluid or a portion of a short edge of a second end of the bag containing the rapid infusion fluid extends is beyond an edge of the inflatable infuser bag.4. The method of wherein during the delivering step the inflatable infuser bag envelopes the bag containing the rapid infusion fluid without covering a first end or a second end of the bag containing the rapid infusion fluid.5. The method of the step of forming an airtight seal between an inflatable infuser bag coupling ...

Occlusion detection for infusion pumps

A system including a tube and a force sensor coupled to a wall of the tube via a restraining element and configured to obtain a value of a tubing force when the tube is deformed by the restraining element. The system includes a processor to determine parameters for fitting a curve including the value of the tubing force, to determine a fluid pressure value for a fluid in the tube based on the parameters for fitting the curve, and to activate an alarm responsive to the fluid pressure value and to the parameters for fitting the curve when an occlusion condition is identified in the tube. The parameters for fitting the curve comprise at least one time-decaying parameter(s) associated to the tubing force. A method for using the system and a non-transitory computer readable medium including instructions to perform the above method are also provided.

Sensor Device for Use in a Medical Fluid Delivery System

A sensor device for use in a medical fluid delivery system, or an infusion pump device, comprises a fluidic chamber with a deformable cover closing at least an area of the chamber and an optical detection system comprising at least one light emitter for emitting one or more incident light beams and a sensor unit for monitoring one or more reflected light beams is presented. In a pressurized state of the fluidic chamber, the deformable cover is deformed such that it forms an inflexion point area within the deformed cover. The one or more incident light beams emitted by the light emitter are directed on the cover such that the one or more incident light beams are reflected essentially in the inflexion point area. 1. A sensor device comprising:a fluidic chamber with a deformable cover closing at least one area of the chamber;an optical detection system comprising at least one light emitter for emitting one or more incident light beams; anda sensor unit for monitoring one or more reflected light beams, wherein the one or more incident light beams emitted by the light emitter are directed on the cover such that the one or more incident light beams are reflected essentially in an inflexion point area that is formed within the deformable cover upon deformation of the deformable cover in a pressurized state of the fluidic chamber, and wherein the fluidic chamber is part of a disposable unit of a medical fluid delivery system and the optical detection system is part of a reusable unit of a medical fluid delivery system.2. The sensor device of wherein the incident light beams are directed on the cover at an angle α3. The sensor device of wherein the light emitter is located on a side of the cover which is curved in a convex manner in an increased pressure state of the fluidic chamber.4. The sensor device of wherein one side of the cover is in fluid contact and the light emitter is located on the other side.5. The sensor device of wherein the incident light beam is essentially ...

VENTED RESERVOIR FOR MEDICAL PUMP

The present invention concerns a medical pump comprising: a. A hard housing comprising a top () and bottom () hard shells, within which a rigid wall () and a movable membrane () create three distinct chambers; wherein i. said movable membrane tightly separates said second () and third () chambers ii. said first and third chambers have a watertight interface iii. said second chamber () is designed to contain a fluid iv. said first chamber () comprises a first venting mean () which is arranged to provide a fluidic communication between said first chamber () and the external environment; v. said third chamber () comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber () and the external environment b. A pumping element () located in the first chamber () c. A least one pressure sensor which measure the pressure gradient between the first chamber () and the second chamber () d. A fluid pathway which permits: i. a first fluid connection () between said second chamber () and said pumping element ii. a second fluid connection () between said pumping element and a patient line (). 125.-. (canceled)26. A delivery medical device comprising a movable membrane and a rigid wall arranged into a hard housing having a bottom hard shell and a top hard shell;wherein at least one of the movable membrane and the rigid wall define into the housing a first chamber, a second chamber intended to store a fluid to be delivered to a patient and a third chamber;wherein the second chamber and the third chamber are tightly separated by the movable membrane and the first chamber and the third chamber are watertightly separated by at least one of the rigid wall and the movable membrane;wherein the delivery medical device further comprises:a fluid pathway configured to provide a fluid communication between the second chamber and the patient;a pumping device configured to convey the fluid through the fluid pathway to the patient;a vent device ...

INFUSION SYSTEM AND METHOD FOR INTEGRITY MONITORING OF AN INFUSION SYSTEM

An infusion system () comprising one or more infusion sources (e.g. pumps and/or reservoirs ()) and hose lines () leading to a patient access () for the infusion of a liquid, has a signal generator (A/S), which introduces a pressure signal or an acoustic signal into the liquid, and a sensor (S), which is arranged spaced apart from the signal generator in the infusion system, and an evaluation circuit, which is operatively connected to the sensor in such a way that a sensor signal output by the sensor produces an input signal of the evaluation circuit, said evaluation circuit being operatively connected to a display in such a way that information based on the sensor signals, about the infusion system, such as the flow rate of the liquid, can be displayed. The invention further discloses a method for integrity monitoring of such an infusion system. 11. Infusion system () ,{'b': 2', '3', '4', '9', '10, 'with an infusion source (, , , , ),'}{'b': 5', '21', '31', '41', '91', '101', '2', '3', '4', '9', '10', '7', '12', '15, 'and a tube (, , , , , ) that runs from one of the infusion source (, , , , ) to one of the access point (, , ),'}{'b': 2', '3', '4', '9', '10', '5', '21', '31', '41', '91', '101', '7', '12', '15', '2', '3', '4', '9', '10', '5', '21', '31', '41', '91', '101, 'and a fluid, which is provided both in the infusion source (, , , , ) and in the tube (, , , , , ) to the access point (, , ) and is transported by means of the infusion source (, , , , ) into the tube (, , , , , ),'}characterized in that,a signal generator (A/S) is provided that is constructed and arranged to introduce a signal into the fluid,{'b': '1', 'as well as a sensor (S, A/S) that detects the signal, the sensor being arranged a distance from the signal generator (A/S) in the infusion system (),'}as well as an evaluation circuit that is operatively connected with the sensor (S, A/S) such, that a sensor signal sent out from the sensor (S, A/S) generates an input signal of the evaluation ...

Infusion system and method for integrity monitoring of an infusion system

An infusion system for transporting fluid into a patient and a method for integrity monitoring of the system. The infusion system includes one or more sources of fluids to be infused, such as pumps or reservoirs, and a plurality of hose lines that carry the fluid to an entry point at the patient. A signal generator introduces a pressure signal into the fluid and a sensor, spaced some distance from the signal generator, receives the sensor signal and generates an input signal based on the sensor signal and transmits the input signal to an evaluation circuit. Information transmitted to the evaluation circuit is displayed visually, the information relating to operating status of fluid sources and lines, as well as to flow rates, blockages, leaks, etc.

TUBE DIAMETER RECOGNITION

A method for measuring a size of a fluid-filled conduit in a fluid-delivery device includes (A) isolating a segment of the fluid-filled conduit by occluding a first site of the fluid-filled conduit and a second site of the fluid-filled conduit (B) iteratively increasing pressure within the isolated segment, by incrementally squeezing a portion of the isolated segment of the fluid-filled conduit, (C) for each iteration of squeezing, measuring an increase in force exerted by the isolated segment of the fluid-filled conduit, associated with a respective pressure change during that incremental squeezing, and (D) measuring an indication of the size of the conduit when an increase in force exerted by the isolated segment, measured in response to an incremental squeezing of the portion of the isolated segment of the fluid-filled conduit, passes above a threshold value. Other applications are also described. 1. A method for measuring a size of a fluid-filled conduit in a fluid-delivery device , the method comprising:(A) isolating a segment of the fluid-filled conduit by occluding a first site of the fluid-filled conduit and a second site of the fluid-filled conduit, the isolated segment being between the first and second sites;(B) iteratively increasing pressure within the isolated segment, by incrementally squeezing a portion of the isolated segment of the fluid-filled conduit;(C) for each iteration of squeezing the portion of the isolated segment of the fluid-filled conduit, measuring an increase in force exerted by the isolated segment of the fluid-filled conduit, associated with a respective pressure change during that incremental squeezing; and(D) measuring an indication of the size of the conduit when an increase in force exerted by the isolated segment, measured in response to an incremental squeezing of the portion of the isolated segment of the fluid-filled conduit, passes above a threshold value.2. The method according to claim 1 , wherein measuring the increase ...

Fluid Occlusion Detection Apparatus and Method

A fluid occlusion detection apparatus is disclosed. The fluid occlusion detection apparatus includes: a structure disposed on a fluid delivery device and that is deformed according to pressure; and a change detection sensor in a surrounding region of the structure, wherein the fluid delivery device includes a fluid reservoir container and/or a fluid delivery passageway for connecting a human body and the fluid reservoir container, and the change detection sensor detects a change in a value related to the change detection sensor due to deformation of a shape of the structure according to an increase in pressure inside the fluid delivery device by fluid occlusion inside the fluid delivery device. 1. A fluid occlusion detection apparatus comprising:a structure disposed on a fluid delivery device and that is deformed according to pressure; anda change detection sensor on a surrounding region of the structure, wherein the fluid delivery device comprises a fluid reservoir container and/or a fluid delivery passageway for connecting a human body and the fluid reservoir container, andthe change detection sensor detects a change in a value related to the change detection sensor due to deformation of a shape of the structure according to an increase in pressure inside the fluid delivery device by fluid occlusion inside the fluid delivery device.2. The fluid occlusion detection apparatus of claim 1 , wherein the structure is disposed on the fluid reservoir container and/or the fluid delivery passageway for connecting the human body and the fluid reservoir container.3. The fluid occlusion detection apparatus of claim 1 , wherein the structure is at least one selected from the group consisting of a membrane claim 1 , a tube claim 1 , a piston claim 1 , and a bellows.4. The fluid occlusion detection apparatus of claim 1 , wherein the change detection sensor comprises a capacitor located on the surrounding region of the structure and detects a change in a capacitance of the ...

INFUSION PUMP LINE IDENTIFICATION

A method identifies to which one of a plurality of infusion pumps one of a plurality of fluid lines is coupled. The method can include intentionally producing a predetermined pressure pattern in one of the plurality of fluid lines, detecting the predetermined pressure pattern by way of a sensor of one of the plurality of infusion pumps, and indicating detection of the predetermined pressure pattern in the one of the plurality of fluid lines, thereby indicating the one of the plurality of infusion pumps to which the one of the plurality of fluid lines is coupled. In some cases, a tool configured to occlude and the squeeze the fluid line can be used to intentionally produce the predetermined pressure pattern. 1. A method for identifying to which one of a plurality of infusion pumps one of a plurality of fluid lines is coupled , the method comprising:intentionally producing a predetermined pressure pattern in one of a plurality of fluid lines;detecting the predetermined pressure pattern by way of a sensor of one of a plurality of infusion pumps; andindicating detection of the predetermined pressure pattern in the one of the plurality of fluid lines, thereby indicating the one of the plurality of infusion pumps to which the one of the plurality of fluid lines is coupled.2. The method of claim 1 , wherein intentionally producing the predetermined pressure pattern includes:occluding the one of the plurality of fluid lines at a first location; andwhile occluded at the first location, squeezing the one of the plurality of fluid lines.3. The method of claim 2 , wherein the squeezing of the one of the plurality of fluid lines includes squeezing between the first location and the one of the plurality of infusion pumps.4. The method of claim 2 , wherein the squeezing includes squeezing the one of the plurality of fluid lines at least two times.5. The method of claim 2 , wherein the intentionally producing the predetermined pressure pattern includes actuating a tool configured ...

DEVICE AND METHOD FOR SETTING THERAPEUTIC PARAMETERS FOR AN INFUSION DEVICE

Embodiments are directed to infusion devices, systems, and methods to detect a capacity of a collapsible fluid reservoir of an infusion cartridge and/or a volume of a fluid disposed in the collapsible fluid reservoir or some other parameters of the infusion cartridge, and setting corresponding therapeutic parameters of an infusion device. Embodiments may include, obtaining data on the volume of fluid in the collapsible fluid reservoir, analyzing the obtained data to determine the setting of therapeutic parameters, and setting one or more therapeutic parameters of an infusion device. 1. A method for detecting a capacity of a collapsible fluid reservoir in an infusion cartridge and setting therapeutic parameters of a portable infusion pump , comprising:obtaining data on a capacity of the collapsible fluid reservoir;analyzing obtained data on the capacity of the collapsible fluid reservoir to determine the setting of therapeutic parameters of the infusion pump; andsetting one or more therapeutic parameters of the infusion pump based on the obtained data.2. The method of claim 1 , wherein setting a therapeutic parameter includes setting a basal rate range.3. The method of claim 1 , wherein setting a therapeutic parameter includes setting a bolus volume range.4. The method of claim 1 , wherein setting a therapeutic parameter includes setting a maximum bolus volume range.5. The method of claim 1 , wherein setting a therapeutic parameter includes setting an insulin sensitivity.6. The method of claim 1 , wherein obtaining data on the capacity of the collapsible fluid reservoir includes illuminating optical indicia on the infusion cartridge.7. The method of claim 6 , further including reading an optical code on the infusion cartridge that indicates the capacity of the collapsible tluid reservoir with an optical sensor.8. The method of claim 7 , wherein the optical code on the infusion cartridge is obtained from omnidirectionally reflecting stripes.9. The method of claim 7 , ...

Medicine Delivery Device Having Detachable Pressure Sensing Unit

A fluid medicament delivery device includes a patient attachment unit and a separate indicator unit. The patient attachment unit includes a housing and a fluid channel located therein, wherein at least a portion of the fluid channel includes a flexible member substantially coterminous with the housing. The separate indicator unit is adapted to be detachably coupled to the housing of the patient attachment unit and includes a first sensing element for contacting the flexible member when the indicator unit is coupled to the housing to sense a flexure of the flexible member. 120-. (canceled)21. A fluid medicament delivery device comprising:a patient attachment unit comprising a housing and a fluid channel located therein, wherein at least a portion of the fluid channel comprises a flexible member; anda separate indicator unit adapted to be detachably coupled to the housing of the patient attachment unit, the indicator unit comprising a first sensing element adapted to detect pressure in the fluid channel via pressure transmitted through at least one of a fluid and a gel due to deflection of the flexible member.22. The fluid medicament delivery device of claim 21 , wherein the patient attachment unit further comprises an adhesive adapted for adhesion to a skin surface of a patient.23. The fluid medicament delivery device of claim 21 , wherein the housing comprises a reservoir adapted to be pressurized when filled with fluid.24. The fluid medicament delivery device of claim 21 , wherein the flexible member comprises a sensor membrane.25. The fluid medicament delivery device of claim 24 , wherein the sensor membrane and a meniscus of the gel are aligned when the indicator unit is coupled to the patient attachment unit.26. The fluid medicament delivery device of claim 25 , wherein the sensor membrane and the meniscus of the gel are in direct contact.27. The fluid medicament delivery device of claim 25 , wherein the meniscus of the gel is exposed when the indicator unit is ...

Dosing device for an infusion system and method thereof

A dosing device for an infusion system comprises a dosing unit having a variable volume and at least one opening in fluid connection with the variable volume, through which opening the variable volume can be filled with a substance or the substance can be dispensed from the variable volume. The dosing device is operable in a first state for filling the substance from a supply conduit, in a second state for preventing filling and dispensing, or in a third state for dispensing through a dispensing conduit. No direct fluid connection exists between the supply conduit and the dispensing conduit at any time. Methods for dosing a substance with the dosing device.

Pneumatically coupled direct drive fluid control system and process

A fluid control system for delivery of a liquid includes a pneumatic drive that incorporates a linear actuator to effect known volume changes in a gas reservoir. The gas reservoir is in fluid communication with a gas-side reservoir that is separated from a fluid-side reservoir by a flexible membrane. Movement of the linear actuator effects positive or negative volume differences on the gas in the gas-side reservoir, resulting in a decrease or increase in pressure of the gas that is transmitted to the fluid-side reservoir to draw fluid, primarily liquid, in from a source or deliver liquid out to a sink. In another aspect, a mechanism is provided for the detection and elimination of air bubbles in the fluid path.

Syringe Flush Protection Valve and Method

A system and a method are adapted for assessing the patency of a fluid infusion line connected to a patient, a source of medicant, and a pump. The system is configured for injecting a fluid into the fluid pressure line using a syringe, determining whether the syringe exhibits a resistance to fluid being injected into a the fluid line and, if no resistance is exhibited, monitoring the pump to verify whether the pump exhibits an alarm that indicates a check valve has been opened. 1. A drug infusion system , comprising:a source of fluid medicant;a pump configured to pump fluid medicant from the source of fluid medicant toward a patient through a fluid line;a sensor coupled to the fluid line, wherein the sensor measures a fluid pressure change in a predetermined location in the fluid line resulting from a fluid being injected into the fluid line; anda microprocessor that determined whether the measured fluid pressure exceeds a threshold, and if the pressure exceeds a threshold, open a check valve to permit fluid to flow through the fluid line in a backflow direction in order to reduce fluid pressure in the fluid line.2. A drug infusion system as in claim 1 , microprocessor causes a notification to be emitted if the fluid pressure exceeds threshold.3. A drug infusion system as in claim 1 , microprocessor causes a notification to be emitted if the check valve is opened.4. A drug infusion system as in claim 1 , wherein the predetermined location is at a location of the pump.5. A drug infusion system as in claim 1 , wherein the backflow direction is a direction away from the patient.6. A drug infusion system as in claim 1 , wherein the check valve is a one way valve.7. A drug infusion system as in claim 2 , wherein the notification is one of an audio claim 2 , visual claim 2 , and tactile notification.8. A drug infusion system as in claim 1 , wherein the pressure threshold is 30 psi.9. A method of regulating pressure in a fluid infusion line claim 1 , the infusion line ...

VENTED RESERVOIR FOR MEDICAL PUMP

The present invention concerns a medical pump comprising: a. A hard housing comprising a top () and bottom () hard shells, within which a rigid wall () and a movable membrane () create three distinct chambers; wherein i. said movable membrane tightly separates said second () and third () chambers ii. said first and third chambers have a watertight interface iii. said second chamber () is designed to contain a fluid iv. said first chamber () comprises a first venting mean () which is arranged to provide a fluidic communication between said first chamber () and the external environment; v. said third chamber () comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber () and the external environment b. A pumping element () located in the first chamber () c. A least one pressure sensor which measure the pressure gradient between the first chamber () and the second chamber () d. A fluid pathway which permits: i. a first fluid connection () between said second chamber () and said pumping element ii. a second fluid connection () between said pumping element and a patient line (). 125.-. (canceled)26. A medical device comprising:a bottom hard shell; anda top hard shell, a cavity being defined in at least one of the bottom hard shell and the top hard shell,wherein at least one of the bottom hard shell and the top hard shell further includes a venting opening to provide a fluidic communication between an external environment of the medical device and the cavity,wherein the venting opening includes a plurality of recesses arranged on at least one of the bottom hard shell and the top hard shell, andwherein each recess forms a passage which extends towards the cavity up to a baffle.27. The device according to the claim 26 , wherein the venting opening has at least one hole.28. The device according to the claim 26 , wherein the venting opening has at least two distinct holes.29. The device according to the claim 26 , wherein ...

Apparatus for infusing fluid

A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen.

Process and system for fluid management during reinjection of adipose tissue

The invention is a process and system, consisting of a reinjection pump, connecting tubing, a reinjection cannula and a recipient site, with fluid management features including a peristaltic pump head and controls for pressure limits, flow rates and flow distribution wherein the process of controlling the reinjected fat and fluid is unique because of the control of flow rates, pressures, matching cannula hole sizes, and maintaining a closed continuous system where the harvesting and reinjection is done all together with a completely closed system. The process utilizes a method and control system to manage pressure levels during reinjection procedures of viable soft tissue. Although this case specifically relates to its use in the reinjection of adipose fat and other tissue back into the body during liposuction procedures, it can be applied to any medical procedure of introducing or re-introducing materials into the body. 1. A process and system of parts that make up a system to transfer adipose tissue with fluid management features , comprising the following:a. a container for the harvested adipose tissue, with an adequate port for removing the adipose tissue using the reinjection pump and flexible tubingb. a reinjection pump, which uses a peristaltic pump head to pump adipose tissue and a touch screen interface for controlsc. flexible tubing creating fluid communication between a container, and the reinjection cannula.d. a reinjection cannula, comprised of a long, hollow metal tube with one or more openings at or near the distal end, fitted onto a hand piece, and with a tapered transition point where the flexible tubing attaches to the cannula.e. a recipient site, which is anywhere the adipose tissue goes when it leaves the reinjection cannula.f. a sensor for providing feedback of internal pressure in the flexible tubing to the reinjection pump, wherein the sensor is attached to a housing that clamps around the flexible tubing, such that the sensor is held firmly ...

INFUSION PUMP WITH TOGGLING CAPABILITY

An infusion pump includes upstream and downstream valves, a pressing surface disposed between the valves which presses on an infusion tube, a pressure sensor which measures pressure within the infusion tube, and a controller. In response to the pressure, the controller determines that there is an occlusion in the infusion tube downstream of the downstream valve, and in response thereto, toggles the upstream valve and the downstream valve. The toggling includes sequentially, (a) while the upstream valve remains closed, isolating a segment of the infusion tube between the valves by closing the downstream valve, (b) while the downstream valve remains closed, reducing pressure in the isolated segment by opening the upstream valve, (c) while the downstream valve remains closed, closing the upstream valve, and (d) while the upstream valve remains closed, reducing pressure downstream of the downstream valve by opening the downstream valve. Other applications are also described. 154-. (canceled)55. Apparatus for use with an infusion tube and a fluid reservoir , the apparatus comprising: an upstream valve;', 'a downstream valve;', 'a pressing surface disposed between the upstream and downstream valves and configured to press on the infusion tube when the infusion pump is coupled to the infusion tube;', 'a pressure sensor configured to measure pressure within the infusion tube; and', in response to the measured pressure, determine that there is an occlusion in the infusion tube downstream of the downstream valve, and', (a) while the upstream valve remains closed, isolating a segment of the infusion tube between the upstream and downstream valves by closing the downstream valve;', '(b) subsequently, while the downstream valve remains closed, reducing pressure in the isolated segment of the infusion tube by opening the upstream valve;', '(c) subsequently, while the downstream valve remains closed, closing the upstream valve; and', '(d) subsequently, while the upstream valve ...

VENTED FLUID CARTRIDGE FOR MEDICAL INFUSION DEVICE

The invention is generally directed toward a novel fluid cartridge for medical infusion devices. The disclosed invention describes a medicament cartridge having an internal vent structure and hydrophobic venting material to permit the equilibration of pressure between an infusion device's reservoir chamber and the external environment, without the need for a costly, difficult to maintain vent located in the housing of the infusion device. 1. A medicament cartridge , comprising:a housing having an open proximal end, a distal end, and a cavity therein defining a reservoir;a plunger configured to slidably insert into the proximal end of the cartridge;a luer connector at the distal end of the cartridge;a fluid outlet port in fluid communication with the reservoir at the distal end of the cartridge;at least one groove about the circumference of the housing configured to receive an pliant O-ring;a sealing ring between the at least one groove and the distal end of the housing; anda vent port comprising an external port extending through the sealing ring and an internal port extending through the housing.2. The medicament cartridge of claim 1 , comprising a vent material disposed in the vent port.3. The medicament cartridge of wherein the vent material is hydrophobic.4. The medicament cartridge of wherein the vent material comprises polyvinylidene fluoride claim 3 , polytetrafluoroethylene claim 3 , ultra-high molecular weight polyethylene claim 3 , a hydrophobically treated modified acrylic claim 3 , or mixtures thereof5. The medicament cartridge of claim 4 , wherein the vent port has a WEP of from about 10 psi to about 15 psi.6. A method for resisting fluid incursion in a medical infusion device claim 4 , comprising:providing a reservoir chamber in the medical infusion device configured to receive a medicament cartridge;providing the medicament cartridge, the medicament cartridge comprising a housing having an open proximal end, a distal end, a cavity therein defining a ...

IN CYCLE PRESSURE MEASUREMENT

An infusion pump includes inlet and outlet valves and a squeezing element configured to squeeze a fluid line coupled to the infusion pump. A method includes at least one round of valve operation check prior to initiation of a delivery session of fluid to a subject, and subsequently, after an intake phase and before a delivery phase of at least one infusion pump cycle, determining for the at least one pump cycle, an absolute amount of air in the fluid line. The valve operation check and the determining of the amount of air each include: (A) closing the inlet valve to confine a section of the fluid line between the inlet and outlet valves; (B) squeezing the confined section; (C) measuring the pressure within the confined section; and (D) subsequently, relieving the pressure in the confined section. Other applications are also described. 114-. (canceled)15. An infusion pump comprising:an inlet valve;an outlet valve;a squeezing element located between the inlet valve and the outlet valve and configured to squeeze a fluid line coupled to the infusion pump;a pressure sensor; and (i) perform at least one round of valve operation check prior to initiation of a delivery session of fluid to a subject, and', '(ii) subsequently, after an intake phase and before a delivery phase of at least one infusion pump cycle, determine, for the at least one infusion pump cycle, an absolute amount of air in the fluid line,, 'electric circuitry configured to (A) triggering closing the inlet valve to confine a section of the fluid line between the inlet valve and the outlet valve;', '(B) triggering squeezing, utilizing the squeezing element, of the confined section of the fluid line;', '(C) measuring the pressure within the confined section of the fluid line; and', '(D) subsequently, triggering relieving of the pressure in the confined section of the fluid line., 'wherein the at least one round of valve operation check and the determining of the amount of air in the fluid line each comprise ...

METHOD FOR DETECTING AN OCCLUSION IN AN INFUSION LINE

A method for detecting an occlusion in an infusion line () connected to an infusion device () comprises: measuring a force (F) applied to a piston () by a pusher device () of an infusion device () for moving the piston () along a movement direction (X) into a cylindrical tube () in order to deliver a medical fluid from the cylindrical tube () towards an infusion line () connected to the cylindrical tube (); calculating, from the measured force (F), a value indicative of a pressure (P) in the cylindrical tube (), wherein for calculating said value indicative of said pressure (P) a frictional force value (FO) indicative of a friction of the piston () relative to the cylindrical tube () is taken into account; and comparing said value indicative of said pressure (P) to a threshold value to determine whether an occlusion is present in the infusion line (). Herein, the frictional force value (F) is determined using a mathematical model modelling the friction of the piston () relative to the cylindrical tube () in dependence on the position of the piston () relative to the cylindrical tube () along the movement direction (X) and in dependence on the velocity by which the piston () is moved relative to the cylindrical tube (). In this way a method for reliably detecting an occlusion in an infusion line during an infusion process is provided. 1. A method for detecting an occlusion in an infusion line connected to an infusion device , comprising:measuring a force applied to a piston by a pusher device of an infusion device for moving the piston along a movement direction into a cylindrical tube in order to deliver a medical fluid from the cylindrical tube towards an infusion line connected to the cylindrical tube,calculating, from the measured force, a value indicative of a pressure in the cylindrical tube, wherein for calculating said value indicative of said pressure a frictional force value indicative of a friction of the piston relative to the cylindrical tube is taken ...

Fluid flow sensor

A fluid flow sensing apparatus and method for detecting pressure and the presence of bubbles within a fluid tube. The flow sensor comprises a housing configured to receive a portion of the tube and to house the pressure sensor and the ultrasonic transmitter. The pressure sensor is positioned adjacent the tube and is configured to receive a pressure sensor signal, which correlates to a detected pressure differential within the tube. An internal controller transmits a drive signal to the ultrasonic transmitter, which emits ultrasonic waves through a portion of the tube and to the pressure sensor. The pressure sensor receives both the ultrasonic waves and a pressure sensor signal, and subsequently transmits an output signal to the internal controller. In the presence of a pressure differential or a bubble within the tube, the output signal will exhibit a DC shift or a distortion of its signal characteristics, respectively.

SYRINGE PUMP RAPID OCCLUSION DETECTION SYSTEM

An apparatus, method and program product detects an occlusion in a fluid line by determining if a relationship between force measurements departs from an expected relationship. 1. A method of automatically detecting an occlusion in a fluid line of an infusion pump , the method comprising:pumping fluid through a fluid line of an infusion pump, the pumped fluid flows through the fluid line at a first rate;detecting a first pressure of fluid within the fluid line at a first time;altering the pumping of fluid through the fluid line if the first pressure surpasses a threshold pressure value;detecting a second pressure of fluid within the fluid line at a second time;automatically resuming the pumping of fluid through the fluid line if the second pressure does not surpass the threshold pressure value; andwherein the pumping of fluid through the fluid line is resumed such that the fluid flows through the fluid line at a second rate that is less than the first rate.2. The method of claim 1 , further comprising:allowing at least a predetermined time period to elapse between the first time and the second time.3. The method of claim 1 , further comprising:providing an indication of an occlusion if the second pressure surpasses the threshold pressure value.4. The method of claim 1 , further comprising:determining if a bolus infusion is indicated.5. The method of claim 4 , wherein determining if a bolus infusion is indicated occurs after altering the pumping of fluid through the fluid line.6. The method of claim 5 , further comprising:generating an occlusion alarm if a bolus infusion is not indicated.7. The method of claim 1 , wherein altering the pumping of fluid through the fluid line includes stopping the pumping of fluid through the fluid line.8. A medical infusion pump comprising:a pump configured to generate a pressure in a fluid line to advance fluid in the fluid line from a fluid source to the patient;a sensor configured to sense a value indicative of pressure in the ...

Systems and Methods for Detecting Disruptions in Fluid Delivery Devices

A sensor system capable of detecting tissue counter pressure from patients that utilize infusion pumps to administer their medication is provided. Embodiments include a retrofitted piece that is placed between the user's infusion set and pump, as well as a “smart” infusion set configured for measuring characteristics of a fluid traveling therethrough. Hardware is provided that couples with the sensor to store, analyze, and compare data to distinguish between normal and non-normal injection/infusion profiles. An alert system notifies the user of a malfunction within the pump, within the infusion set, or at the injection/infusion site. 1. A sensor housing , comprising:a first connector portion configured for connecting the sensor housing to an infusion set;a second connector portion configured for connecting the sensor housing to a pump;a sampling cavity positioned between the first connector portion and the second connector portion, the sampling cavity in fluid communication with the first and second connector portions via first and second channels, respectively; anda sensor chamber in fluid communication with the sampling cavity, said sensor chamber configured for accommodating at least a portion of a sensor.2. The sensor housing of claim 1 , wherein the sensor chamber extends orthogonally to a flow path of fluid through the first and second channels.3. The sensor housing of claim 1 , further comprising a reservoir extending from the second connector portion.4. The sensor housing of claim 1 , further comprising a sensor configured for at least one of collecting and transmitting data pertaining to a fluid in the sampling cavity.5. The sensor housing of claim 1 , wherein a portion of the sampling cavity is defined by a sensor when the sensor is inserted into the sensor chamber.6. The sensor housing of claim 1 , wherein the sampling cavity defines an aperture configured for receiving a portion of a sensor.7. A system for at least one of monitoring characteristics of a ...

FORCE SENSING DEVICES, SYSTEMS AND METHODS FOR SYRINGE PUMPS

A syringe pump configured to mechanically align a force sensor with an axis of a plunger of a syringe for a purpose of minimizing force measurement inaccuracies. The syringe pump includes a syringe pump housing that is configured to receive at least a portion of said syringe, wherein the syringe is selected from a plurality of syringes of different dimensions. A plunger retainer mechanism is pivotably coupled to the syringe pump housing and is configured to retain said plunger of said syringe. The plunger retainer mechanism pivots relative to the syringe pump housing based on a sensed dimension of the plunger to align a force sensor coupled to the plunger retainer mechanism with the axis of the plunger; and a syringe drive mechanism is operably coupled to the syringe pump housing and configured to shift the plunger relative to the portion of the syringe received by the syringe pump housing. 1. A syringe pump configured to mechanically align a force sensor with an axis of a plunger of a syringe for a purpose of minimizing force measurement inaccuracies , comprising:a syringe pump housing configured to receive at least a portion of the syringe, wherein the syringe is selected from a plurality of syringes of different dimensions;a plunger retainer mechanism pivotably coupled to the syringe pump housing and configured to retain the plunger of the syringe, wherein the plunger retainer mechanism pivots relative to the syringe pump housing based on a sensed dimension of the plunger to align a force sensor coupled to the plunger retainer mechanism with the axis of the plunger; anda syringe drive mechanism operably coupled to the syringe pump housing and configured to shift the plunger relative to the portion of the syringe received by the syringe pump housing.2. The syringe pump of claim 1 , wherein the plunger retainer mechanism includes at least one arm configured to pivot so as to abut a portion of the syringe.3. The syringe pump of claim 2 , wherein the plunger retainer ...

METHOD AND SYSTEM FOR DETECTING MALFUNCTION OF A MEMS MICROPUMP

Method for detecting failure including possible under or over delivery of a micropump having at least an inlet valve, a pumping chamber with an inner pressure sensor and an outlet valve, said method comprising the determination of the pump tightness via the measurement of the pressure by said inner pressure sensor in said pumping chamber at least at certain intervals when the pump is inactive and the comparison with a value of reference.

INFUSION DEVICE SUITABLE TO TEST FOR EXTRAVASATION

An infusion device () for administering a medical fluid to a patient (P) comprises a pumping mechanism () for pumping a medical fluid through a delivery line (), and a processor device () for controlling the pumping mechanism (), during an infusion operation, to pump the medical fluid through the delivery line () in a downstream direction (F). Herein, the processor device () is constituted to perform, prior to an infusion operation, a test function during which the processor device () controls the pumping mechanism () to pump the medical fluid through the delivery line () in an upstream direction (F) opposite the downstream direction (F). In this way an infusion device is provided that supports a user, in particular a nurse, to perform an infusion operation, in particular to set up the infusion device for performing the infusion operation.

Syringe Pump Having a Pressure Sensor Assembly

A syringe pump is disclosed that includes a body, a syringe seat, a syringe actuator, a memory, and one or more processors. The syringe seat is coupled to the body. The syringe actuator is configured to actuate a syringe secured within the syringe seat. The memory is configured to store a plurality of instructions. The one or more processors, in accordance with the plurality of instructions, is/are configured to: prime the syringe pump in a prime phase; determine if an occlusion exists during the prime phase using a first test; stop the prime phase; initiate fluid delivery into a patient; enter into a start-up phase; determine if an occlusion exists using a second test during the start-up phase; transition from the start-up phase into a steady-state phase; and determine if an occlusion exists during the steady-state phase using a third test.

Medicine Delivery Device Having Detachable Pressure Sensing Unit

A fluid medicament delivery device includes a patient attachment unit and a separate indicator unit. The patient attachment unit includes a housing and a fluid channel located therein, wherein at least a portion of the fluid channel includes a flexible member substantially coterminous with the housing. The separate indicator unit is adapted to be detachably coupled to the housing of the patient attachment unit and includes a first sensing element for contacting the flexible member when the indicator unit is coupled to the housing to sense a flexure of the flexible member. 148.-. (canceled)49. A fluid medicament delivery device comprising:a disposable patient attachment unit adapted to deliver a fluid medicament contained therein to a patient; and adapted to: (i) detachably connect to the patient attachment unit, (ii) notify the patient when to disconnect the indicator unit from the patient attachment unit, and (iii) connect to a different patient attachment unit; and', 'not adapted to change a flow rate of the medicament., 'a separate reusable indicator unit, wherein the indicator unit is50. The fluid medicament delivery device of claim 49 , wherein the patient attachment unit further comprises a micro-fluidic circuit adapted to transport the medicament.51. The fluid medicament delivery device of claim 50 , wherein the patient attachment unit comprises a flexible sensor membrane in fluidic communication with the micro-fluidic circuit and adapted to communicate the pressure in the micro-fluidic circuit.52. The fluid medicament delivery device of claim 49 , wherein the patient attachment unit further comprises an adhesive adapted for adhesion to a skin surface of the patient.53. The fluid medicament delivery device of claim 49 , wherein the patient attachment unit is adapted to mate with a cannula adapted for insertion into the skin of the patient.54. The fluid medicament delivery device of claim 49 , wherein the indicator unit detachably connects to the patient ...

Fluid bolus detection

The present disclosure provides systems that include a flow probe that senses fluid flow or mass flow of fluid delivery to a patient. Based at least in part on the sensed fluid or mass flow, the flow probe provides flow-related data (e.g., volume or mass flow rate) that the system uses to derive a volume of fluid being delivered. The fluid can be delivered from an IV bag, another in-line port, or a combination of the two. The disclosed systems provide fluid volume and/or fluid rate for display to a clinician and an informative understanding of what volume of fluid/mass a patient has received.

OCCLUSION DETECTION IN DELIVERY OF FLUIDS

A system, method or apparatus to detect abnormalities in delivery of a fluid may include an infusion apparatus that is controllable to cause one or more perturbations in a fluid flow (e.g., each of the one or more perturbations in the fluid flow may result in a measurable perturbed force response). A force signal representative of the perturbed force response may be used to determine an integrated perturbed force response value (e.g., using integration of the force signal over a perturbation time period; the integrated perturbed force response value being representative of an additional force caused by the at least one perturbation over an equilibrium force). A ratio between the integrated perturbed force response value and a normalizing value (e.g., based at least on a maximum perturbation force of the perturbed force response) may be used to determine if fluid flow is occluded. 1. A system to detect abnormalities in delivery of a fluid comprising:an infusion apparatus controllable to provide a fluid flow at an infusion flow rate, wherein the infusion apparatus is further controllable to intermittently deliver a defined volume of fluid resulting in one or more perturbations in the fluid flow;a force transducer configured to measure a perturbed force response over time resulting from each of the one or more perturbations; and control the infusion apparatus to provide a fluid flow at an infusion flow rate and to cause one or more perturbations in the fluid flow, wherein each of the one or more perturbations in the fluid flow result in a measurable perturbed force response;', 'receive a force signal representative of a perturbed force response comprising at least a maximum perturbation force resulting from at least one perturbation caused in the fluid flow;', 'determine an integrated perturbed force response value using integration of the force signal over a perturbation time period, the integrated perturbed force response value being representative of an additional ...

INFUSION PUMP WITH TUBE LOADING GUIDANCE AND CONFIRMATION

An infusion pump includes a housing with a door pivotally mounted to the housing, a tube channel on the housing configured to hold a tube in the infusion pump, a pumping mechanism including a shuttle, and a slide clamp ejection device. 1. An infusion pump comprising:a housing with a door pivotally mounted to the housing;a tube channel positioned at least partially behind the door on the housing, the tube channel configured to hold a tube in the infusion pump;a pumping mechanism including a shuttle positioned behind the door; anda slide clamp ejection device including a solenoid configured to automatically eject the slide clamp from a channel based on one or more inputs from one or more sensors arranged on the infusion pump.2. The infusion pump of claim 1 , wherein the tube is in an occluded state after the slide clamp is inserted within the channel.3. The infusion pump of claim 2 , wherein the one or more sensors include at least one of a first Hall effect sensor configured to detect when the door is positioned in a closed state claim 2 , an optical IR sensor configured to detect when the door is latched while positioned in the closed state claim 2 , a pressure sensor configured to detect the presence of the tube at a load point along the tube channel claim 2 , and a second Hall effect sensor configured to detect that a valve is closed to place the tube in an occluded state.4. The infusion pump of claim 3 , wherein the infusion pump is configured to initiate an infusion after receiving a confirmation that the slide clamp is in an ejected state and the door is in a closed state.5. The infusion pump of claim 1 , wherein the door is configured to unlock and transition between a closed state and an open state after the slide clamp is inserted within the channel.6. The infusion pump of claim 1 , further including a sensor claim 1 , wherein the sensor detects the presence of the slide clamp within the channel.7. The infusion pump of claim 6 , wherein the sensor is a Hall ...

MODEL-BASED INFUSION SITE MONITOR

A medication delivery monitoring device is disclosed. The device includes a user interface configured to receive input information, and a sensor configured to measure a plurality of fluid state parameters of a fluid delivery channel through which the medication is delivered by a vascular access device (VAD) to an infusion site region of the patient. The device also includes a processor configured to determine a state of the infusion site region based on the plurality of measured fluid state parameters and the input information, and an output device configured to provide a communication regarding the state of the infusion site region. Methods and computer-readable mediums for monitoring medication delivery are also disclosed. 128-. (canceled)29. A medication delivery monitoring device comprising:a sensor that measures a plurality of fluid state parameters of a fluid delivery channel through which the medication is delivered to an infusion site region of a patient; anda processor that (i) creates a model of a state of the infusion site region, comprising fluid state parameters of interstitial tissue at the infusion site region, based on the measured fluid state parameters and received input information, wherein the model comprises a determination of an osmotic gradient component indicative of a difference in a protein concentration across a membrane of the fluid delivery channel, and (ii) provides a communication to an output device if the measured fluid state parameters at the infusion site region are not within expected infusion site region parameters.30. The device of claim 29 , wherein the model of a state of the infusion site region comprises an uninfiltrated and infiltrated states.31. The device of claim 29 , wherein the input information comprises any of patient information claim 29 , medication delivery device information claim 29 , and medication information.32. The device of claim 31 , wherein the medication information comprises at least one of a chemical ...

OCCLUSION DETECTION FOR INFUSION PUMPS

A system including a tube and a force sensor coupled to a wall of the tube via a restraining element and configured to obtain a value of a tubing force when the tube is deformed by the restraining element. The system includes a processor to determine parameters for fitting a curve including the value of the tubing force, to determine a fluid pressure value for a fluid in the tube based on the parameters for fitting the curve, and to activate an alarm responsive to the fluid pressure value and to the parameters for fitting the curve when an occlusion condition is identified in the tube. The parameters for fitting the curve comprise at least one time-decaying parameter(s) associated to the tubing force. A method for using the system and a non-transitory computer readable medium including instructions to perform the above method are also provided. 1. A system for detection of a fluid condition in a flexible tubing , the system comprising:a restraining element for receiving a tube;a sensor coupled to the restraining element and positioned to obtain a value of a tubing force when the tube is received by the restraining element;a memory storing instructions; and generate a force-time curve representative of values of the tubing force obtained by the sensor over time;', 'determine a time-decaying parameter associated with the tubing force characterizing the force-time curve; and', 'determine a fluid pressure value for a fluid in the tube based at least in part on the time-decaying parameter, a material of the tube, a dimension of the tube, and a use history of the tube., 'a processor configured to execute the instructions to2. The system of claim 1 , wherein the processor is configured to:detect an anomaly in at least one of the fluid pressure value or the time-decaying parameter; andactivate an alarm based on the detected anomaly.3. The system of claim 2 , wherein to activate the alarm claim 2 , the processor is further configured to compare the parameters for fitting the ...

DETECTION OF AN ENDOSCOPE TO A FLUID MANAGEMENT SYSTEM

A fluid management and medical device system may include a fluid management system and a medical device. The fluid management system may include a pump configured to pump fluid to the medical device and a processing device configured to control the pump to maintain a target fluid flow range. The medical device may include an elongate shaft in fluid communication with the pump of the fluid management system, a pressure sensor, and a workstation in electronic communication with the pressure sensor and the processing device of the fluid management system. The processing device may be configured to adjust a fluid flow rate based on data received from the pressure sensor of the medical device and configured to verify the medical device is in a patient's body prior to adjusting the fluid flow rate based on the data received from the pressure sensor. 1. A fluid management and medical device system comprising: a pump configured to pump fluid from a fluid supply source through the fluid management system at a fluid flow rate; and', 'a processing device including a user interface, the processing device configured to control the pump to maintain a target fluid flow rate based on the set of system operating parameters;, 'a fluid management system comprising an elongate shaft in fluid communication with the pump of the fluid management system;', 'a pressure sensor disposed at a distal end of the elongate shaft;', 'a handle coupled to a proximal end of the elongate shaft; and, 'a medical device comprisingwherein the processing device of the fluid management system is configured to adjust the fluid flow rate based on data received from the pressure sensor of the medical device; andwherein the processing device of the fluid management system is configured to verify the medical device is in a patient's body prior to adjusting the fluid flow rate based on the data received from the pressure sensor of the medical device.2. The system of claim 1 , wherein the processing device of the ...

Fluid flow resistance monitoring system

Flow parameters in a fluid delivery assembly are determined by monitoring pressure responses and processing those responses along with information regarding the fluid flow. In one aspect, a processor controls the pump to pump flow quantities in accordance with a pseudorandom code. Portions of the resulting pressure signal sensed are then decoded in accordance with the pseudorandom code. An estimate of the equilibrium pressure is generated from the decoded pressure values, while a summation of the pressure samples is generated from the undecoded pressure signals. The resistance to fluid flow of the system is determined from the estimated equilibrium pressure and pressure summation. For low flow rates, a processor controls the pump to pump fluid in a series of fluid boluses, with each fluid bolus delivered in the beginning of a separate timeslot. The equilibrium pressure is measured at the end of each timeslot, and a summation of the pressure samples is generated from the pressure signals. For high flow rates, the pump is controlled to vary the flow rate and the change in pressure is divided by the change in flow to directly determine the resistance. A resistance display continuously displays the resistance of the system. The pseudorandom coding and decoding can be used to filter out pressure-response crosstalk caused by multiple fluid infusion segments feeding into a common line.

Fluid flow resistance monitoring system

Flow parameters in a fluid delivery assembly are determined by monitoring pressure responses and processing those responses along with information regarding the fluid flow. In one aspect, a processor controls the pump to pump flow quantities in accordance with a pseudorandom code. Portions of the resulting pressure signal sensed at the conduit is averaged, and the averaged values are then decoded in accordance with the pseudorandom code. An estimate of the equilibrium pressure is generated from the decoded average pressure values, while a summation of the pressure samples is generated from the undecoded pressure signals. The resistance to fluid flow of the system is determined from the estimated equilibrium pressure and pressure summation. For low flow rates, a processor controls the pump to pump fluid in a series of fluid boluses, with each fluid bolus delivered in the beginning of a separate timeslot. The equilibrium pressure is measured at the end of each timeslot, and a summation of the pressure samples is generated from the pressure signals. For high flow rates, the pump is controlled to vary the flow rate and the change in pressure is divided by the change in flow to directly determine the resistance. A resistance display continuously displays the resistance of the system. The pseudorandom coding and decoding can be used to filter out pressure-response crosstalk caused by multiple fluid infusion segments feeding into a common line.

Fluid flow resistance monitoring system

Flow parameters in a fluid delivery assembly are determined by monitoring pressure responses and processing those responses along with information regarding the fluid flow. In one aspect, a processor controls the pump to pump flow quantities in accordance with a pseudorandom code. Portions of the resulting pressure signal sensed at the conduit is averaged, and the averaged values are then decoded in accordance with the pseudorandom code. An estimate of the equilibrium pressure is generated from the decoded average pressure values, while a summation of the pressure samples is generated from the undecoded pressure signals. The resistance to fluid flow of the system is determined from the estimated equilibrium pressure and pressure summation. For low flow rates, a processor controls the pump to pump fluid in a series of fluid boluses, with each fluid bolus delivered in the beginning of a separate timeslot. The equilibrium pressure is measured at the end of each timeslot, and a summation of the pressure samples is generated from the pressure signals. For high flow rates, the pump is controlled to vary the flow rate and the change in pressure is divided by the change in flow to directly determine the resistance. A resistance display continuously displays the resistance of the system. The pseudorandom coding and decoding can be used to filter out pressure-response crosstalk caused by multiple fluid infusion segments feeding into a common line.

Syringe pump rapid occlusion detection system

An apparatus, method and program product detects an occlusion in a fluid line by determining if a relationship between force measurements departs from an expected relationship.

Syringe pump having a pressure sensor assembly

A syringe pump is disclosed that includes a body, a syringe seat, a syringe actuator, a memory, and one or more processors. The syringe seat is coupled to the body. The syringe actuator is configured to actuate a syringe secured within the syringe seat. The memory is configured to store a plurality of instructions. The one or more processors, in accordance with the plurality of instructions, is/are configured to: prime the syringe pump in a prime phase; determine if an occlusion exists during the prime phase using a first test; stop the prime phase; initiate fluid delivery into a patient; enter into a start-up phase; determine if an occlusion exists using a second test during the start-up phase; transition from the start-up phase into a steady-state phase; and determine if an occlusion exists during the steady-state phase using a third test.

Syringe pump having a pressure sensor assembly

A syringe pump is disclosed that includes a body, a syringe seat, a syringe actuator, a memory, and one or more processors. The syringe seat is coupled to the body. The syringe actuator is configured to actuate a syringe secured within the syringe seat. The memory is configured to store a plurality of instructions. The one or more processors, in accordance with the plurality of instructions, is/are configured to: prime the syringe pump in a prime phase; determine if an occlusion exists during the prime phase using a first test; stop the prime phase; initiate fluid delivery into a patient; enter into a start-up phase; determine if an occlusion exists using a second test during the start-up phase; transition from the start-up phase into a steady-state phase; and determine if an occlusion exists during the steady-state phase using a third test.

Sensor device for use in a medical fluid delivery system

A sensor device for use in a medical fluid delivery system, or an infusion pump device, comprises a fluidic chamber with a deformable cover closing at least an area of the chamber and an optical detection system comprising at least one light emitter for emitting one or more incident light beams and a sensor unit for monitoring one or more reflected light beams is presented. In a pressurized state of the fluidic chamber, the deformable cover is deformed such that it forms an inflexion point area within the deformed cover. The one or more incident light beams emitted by the light emitter are directed on the cover such that the one or more incident light beams are reflected essentially in the inflexion point area.

Sensor device for use in a medical fluid delivery system

A sensor device for use in a medical fluid delivery system, or an infusion pump device, comprises a fluidic chamber with a deformable cover closing at least an area of the chamber and an optical detection system comprising at least one light emitter for emitting one or more incident light beams and a sensor unit for monitoring one or more reflected light beams is presented. In a pressurized state of the fluidic chamber, the deformable cover is deformed such that it forms an inflexion point area within the deformed cover. The one or more incident light beams emitted by the light emitter are directed on the cover such that the one or more incident light beams are reflected essentially in the inflexion point area.

Drug delivery device and method

A drug delivery device includes a pressurized reservoir in communication with a flow path to an outlet. The flow path includes two normally-closed valves and a flow restriction. A pressure measurement arrangement measures a differential fluid pressure between two points along the flow path which span at least part of the flow restriction, one of the points being between the valves. A controller selectively opens the valves to deliver a defined quantity of the liquid medicament to the outlet.

Intravenous line valving system

An intravenous line valving system. A fitting (75) for attaching an intravenous line to a drip chamber (71) is equipped with an aperture (61) through the exterior of the fitting permitting communication with the intravenous fluid path. A fluidtight member over the aperture prevents leakage of intravenous fluid and means are provided for compressing the flexible member against the interior surface of the fitting so as to regulate the flow of intravenous fluid through the line. In a preferred embodiment, the flexible member is compressed by an actuating pin on a medical infusion controller. In a further preferred embodiment, the compression of the membrane is accomplished by advancing a screw (73) in a removable screw holder (72) that seats snugly around the fitting proximate to the aperture.

Methods for pulsed delivery of fluids from a pump

Methods and systems are disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constructed and configured to be coupled to a reusable pump drive component. In other embodiments, the pumping cartridges include multiple pump chambers, which pump chambers are operated so that a pump flow rate of one pump chamber is a predetermined fraction of the pump flow rate of another pump chamber within the pumping cartridge.

Flow control system using boyle's law

A dispensing arrangement in a fluid line that isolates a region of fluid in the line from pressure effects in the line outside the region. A housing of measuring fluid surrounds the region so that changes in the measurement fluid pressure cause changes in the pressure of the original fluid in the region. Predetermined volume increments of the measurement fluid are displaced, causing changes in the original fluid pressure in the region which are measured by a pressure transducer. The dispensing arrangement also repetitively dispenses fluid into and out of the region in increments monitored by the pressure transducer.

Fluid management system with auxiliary dispensing chamber

A system that permits highly accurate flow control, even at very low flow rates, by providing a measurement chamber and an auxiliary dispensing chamber having a volume that is variable between fixed maximum and minimum limits. The maximum volume of the dispensing chamber is substantially smaller than the maximum volume of the measurement chamber used in this type of system. The dispensing chamber can then be filled to its maximum volume from the measurement chamber and thereafter caused to be reduced over time to its minimum volume. Because the maximum and minimum volumes of the dispensing chamber are known, the volume change of the dispensing chamber per unit time is determinable and is the flow rate out of the system.

Pumping cartridge including a bypass valve and method for directing flow in a pumping cartridge

Pumping cartridges are disclosed for use in pumping systems. One such cartridge includes a series of fluid flow paths therein and a bypass valve therein, the bypass valve can selectively block fluid flow along one or both of two fluid flow paths through the valve. In some embodiments, the pumping cartridges are removable from a reusable pump drive component. In some embodiments the pumping cartridges comprise a substantially rigid component having one or more channels and/or depressions therein covered by a membrane so that together the rigid component and the membrane define a series of fluid flow paths, pump chambers and fluidic valves, including a bypass valve.

Pressure-measurement flow control system

A system is provided for controlling flow of a first fluid through a line. Dispensing means isolates a region of the first fluid in the line from effects of pressure in the line outside of the region and repetitively dispenses into and out of the region volume increments of first fluid. Measurement fluid housing means houses measurement fluid in communication with the region such that the dispensing of increments of first fluid into or out of the region causes a change in the measurement fluid pressure. Displacement means displaces a predetermined volume increment of measurement fluid into and out of the measurement fluid housing means, such that displacement of the predetermined volume increment causes a change in the measurement fluid pressure when the region is isolated by the dispensing means. Pressure measurement means measures changes in measurement fluid pressure. Control means, in communication with the pressure measurement means, the displacement means, and the dispensing means, causes the dispensing means to dispense first fluid in increments based on data from the pressure measurement means, such that at least one of the predetermined volume increments of measurement fluid displaced serves as a reference for the volume increments of first fluid outputted.

Valve system with removable fluid interface

A valve having a disposable portion, which comes into contact with the fluid being controlled by the valve. The disposable portion has a valving chamber and a flexible membrane, which can seal off a mouth that is located on a protrusion in the chamber. The disposable portion is held by a fixture which uses a control gas or a mechanical actuator to apply pressure to the flexible membrane. The disposable portion may also have a pressure conduction chamber, which may be used to measure the flow rate of liquid through the disposable portion.

Methods and systems for pulsed delivery of fluids from a pump

A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constructed and configured to be coupled to a reusable pump drive component. In other embodiments, the pumping cartridges include multiple pump chambers, which pump chambers are operated so that a pump flow rate of one pump chamber is a predetermined fraction of the pump flow rate of another pump chamber within the pumping cartridge.

Pumping cartridge having an integrated filter and method for filtering a fluid with the cartridge

The present invention involves, in some embodiments, reusable pump drive systems, which are coupled to removable, and preferably disposable, pumping cartridges. The invention provides, in some embodiments, novel pumping cartridges for use in pumping systems. One such cartridge includes an integrated filter element therein for filtering fluids, for example fluids pumped to the body of a patient in a medical procedure. In some embodiments, the integrated filter is utilized as a blood clot removal filter and in other embodiments is used to remove particulates liquids infused to a patient. The filter element includes a filter with pores therein that are preferably sized to permit essentially unrestricted flow of individual human blood cells therethrough and to block or collect blood clots, cell clumps, particulates etc. with sizes substantially larger than the average size of a human blood cell.

Constant-pressure fluid supply system with multiple fluid capability

The invention provides a system for dispensing fluid at relatively constant pressure. In a first embodiment, the invention dispenses a fluid from a chamber of varying dimension defined by a pre-tensioned resilient membrane. In a second embodiment, the invention dispenses a fluid from a chamber defined by a dispensing membrane, which is substantially surrounded by another fluid contained within a pressure chamber of varying dimension defined by a pre-tensioned resilient membrane. In a third embodiment, the invention dispenses multiple fluids, a first fluid from a first dispensing chamber of varying dimension defined by a pre-tensioned resilient membrane, and a second fluid from a dispensing chamber of varying dimension defined by a dispensing membrane substantially surrounded by the first fluid. In a fourth embodiment the invention dispenses multiple fluids from at least two dispensing chambers of varying dimension each substantially surrounded by the pressure fluid contained within a pressure chamber of varying dimension defined by a pre-tensioned resilient membrane. In a preferred embodiment, the resilient membrane is pre-tensioned beyond the point at which, as fluid enters the volume contained by the membrane and the volume increases, the first derivative of pressure over volume becomes zero for the first time.

Intravenous fluid delivery system with air elimination

An air elimination system is provided for an intravenous fluid delivery system for intravenous injection of fluid into a patient. An air-detection apparatus (5) is disposed in an intravenous fluid line (3). A return line (8) is attached to a point in the line (3) below the air-detection apparatus (5). The other end of the return line (8) is attached to a chamber (1, 2, 12) where air may be separated from the fluid. The separation chamber may be a drip chamber (12), a metering chamber (2) or the intravenous supply (1). When air is detected, a valve (11) or valves (7, 9) are switched, so that the intravenous fluid is prevented from flowing to the patient, and so that, when a pump (4) is turned on, the fluid is pumped through the return line (8) to the separation chamber (1, 2, 12).

Quick-disconnect valve

A normally-closed valve that can be easily connected and disconnected. Disposed in the fluid passageway through the valve is a cylindrical member that may be moved between an open position and a closed position. A spring holds the member in the closed position, and a leur-type cannula may be inserted into the valve to push the member into the open position. Two sealing rings are mounted around the cylindrical member. These rings prevent flow through the valve when the member is in its closed position. Two sets of channels are placed in the walls of the passageway to permit flow around the sealing rings when the member is in its open position.

Quick-disconnect valve

A normally-closed valve that can be easily connected and disconnected. Disposed in the fluid passageway through the valve is a flexible, resilient disk and a pin mounted adjacent to the disk. The disk is mounted in a wide portion of the passageway and is held in place by the narrow portions of the passageway. The disk fits snugly into the passageway so that the edge of the disk forms a seal with the wall of the passageway. A nozzle is inserted into the passageway and urges the pin against the disk, causing the disk to deform. When the disk deforms, its effective diameter decreases, and its edge separates from the passageway wall, permitting fluid to flow through the valve. The narrow sections of the passageway wall have channels disposed therein for permitting flow when the disk is deformed. The pin also has channels on its surface to permit flow around it.

Positive pressure infusion system having downstream resistance measurement capability

A fluid delivery system includes a first fluid container having infusion fluid for a patient. The first fluid container has an outlet and a conduit attached to the outlet. A second fluid container applies pressure to the first fluid container to force fluid out of the first container and into the conduit at a desired flow rate. A pressure sensor is coupled to the second fluid container and a flow sensor is coupled to the conduit. The processor monitors the flow rate and controls the duty cycle of a downstream flow control actuator to maintain the desired flow rate. The processor determines the downstream resistance of the system by varying the flow rate about the selected flow rate, receiving pressure signals from the pressure sensor and flow signals from the flow sensor, and calculating the change in pressure over the change in flow rate to produce the fluid resistance measurement.

Methods for controlling a pump's flow rate by pulsed discharge

Methods and systems are disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constructed and configured to be coupled to a reusable pump drive component. In other embodiments, the pumping cartridges include multiple pump chambers, which pump chambers are operated so that a pump flow rate of one pump chamber is a predetermined fraction of the pump flow rate of another pump chamber within the pumping cartridge.

Methods and systems for pulsed delivery of fluids from a pump

Methods and systems are disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constructed and configured to be coupled to a reusable pump drive component. In other embodiments, the pumping cartridges include multiple pump chambers, which pump chambers are operated so that a pump flow rate of one pump chamber is a predetermined fraction of the pump flow rate of another pump chamber within the pumping cartridge.

Pneumatically coupled fluid control system and process with air detection and elimination

A fluid control system for delivery of a liquid includes a pneumatic drive that incorporates a linear actuator to effect known volume changes in a gas reservoir. The gas reservoir is in fluid communication with a gas-side reservoir that is separated from a fluid-side reservoir by a flexible membrane. Movement of the linear actuator effects positive or negative volume differences on the gas in the gas-side reservoir, resulting in a decrease or increase in pressure of the gas that is transmitted to the fluid-side reservoir to draw fluid, primarily liquid, in from a source or deliver liquid out to a sink. In another aspect, a mechanism is provided for the detection and elimination of air bubbles in the fluid path.

Flow control valve system

A valve for controlling intravenous fluid includes a flexible membrane (11), which together with a rigid body (21) forms a valving chamber (29). Two mouths (27, 32) lead into and out of the valving chamber. In one embodiment, a stem (23) having an enlarged portion (15) is attached to the membrane's inner face and extends into the outlet mouth. Fluid pressure on the inner face causes the enlarged portion of the stem to press against a narrower portion (38) of the outlet conduit, thereby preventing flow through the outlet conduit. External pressure on the membrane's outer face causes the enlarged portion of the stem to separate from the outlet conduit's walls, thereby permitting flow through the outlet conduit. In another embodiment, a groove (43) is placed near one of the mouths. The membrane may be pressed against the rigid body and the groove, so as to prevent flow except through the groove and to variably restrict flow through the groove.

Sistema de perfusão de pressão positiva com capacidade de medição da resistencia a jusante

Pump controller using acoustic spectral analysis

A system for controlling the flow of fluid through a line (3). The system may include first and second valves (A, B; and 6, 7) in the line (3). Between the first and second valves is located a chamber (52, 82), part of which may be filled with fluid having a variable volume (52), and another part of which is filled with a measurement gas (82, V 1 ), such as air. The chamber may be isolated from the pressure effects in the rest of the line by closing both valves. The valves may also permit fluid to flow into or out of the chamber. The second portion of the chamber has a common boundary with the first part in such a way that the combined volume of the first and second parts is constant. A loudspeaker (22, 33, 571) creates sound waves in the gas in the second part of the chamber, in order to measure the volume of the fluid in the first part. A controller directs the operation of the valves and controls positive and negative pressure sources, which may be used to create subsonic pressure variations to produce the desired flow. The volume measurement is achieved by acoustic volume measurement techniques.

Flow control system with volume-measuring system using a resonatable mass

A system for controlling the flow of fluid through a line 3. The system may include first and second valves (A, B; and 6, 7) in the line 3 between is located a chamber (52, 82), part of which may be filled with fluid having a variable volume (52), and another part is filled with a measurement gas (V 1 ), such as air. The chamber may be isolated from the pressure effects in the rest of the line by closing both valves. The valves may also permit fluid to flow into or out of the chamber. The second portion of the chamber has a common boundary with the first part in such a way that the combined volume of the first and second parts is constant. A loudspeaker (22, 33, 571) creates sound waves in the gas in the second part of the chamber, in order to measure the volume of the fluid in the first part, and for directing the operation of the valves and creating subsonic pressure variations to produce the desired flow. The volume measurement is achieved by acoustic volume measurement techniques.

Apparatus for infusing fluid

A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen.

Method and system for measuring volume and controlling flow

A system for controlling the flow of fluid through a line 3. The system may include first and second valves (A, B; and 6, 7) in the line 3 between is located a chamber (52, 82), part of which may be filled with fluid having a variable volume (52), and another part is filled with a measurement gas (V 1 ), such as air. The chamber may be isolated from the pressure effects in the rest of the line by closing both valves. The valves may also permit fluid to flow into or out of the chamber. The second portion of the chamber has a common boundary with the first part in such a way that the combined volume of the first and second parts is constant. A loudspeaker (22, 33, 571) creates sound waves in the gas in the second part of the chamber, in order to measure the volume of the fluid in the first part, and for directing the operation of the valves and creating subsonic pressure variations to produce the desired flow. The volume measurement is achieved by acoustic volume measurement techniques.

Flow conrol system

A system for controlling the flow of fluid through a line 3. The system may include first and second valves (A, B; and 6, 7) in the line 3 between is located a chamber (52, 82), part of which may be filled with fluid having a variable volume (52), and another part is filled with a measurement gas (V 1 ), such as air. The chamber may be isolated from the pressure effects in the rest of the line by closing both valves. The valves may also permit fluid to flow into or out of the chamber. The second portion of the chamber has a common boundary with the first part in such a way that the combined volume of the first and second parts is constant. A loudspeaker (22, 33, 571) creates sound waves in the gas in the second part of the chamber, in order to measure the volume of the fluid in the first part, and for directing the operation of the valves and creating subsonic pressure variations to produce the desired flow. The volume measurement is achieved by acoustic volume measurement techniques.

Apparatus for infusing fluid

A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen.

Drug delivery device and method

A drug delivery device includes a pressurized reservoir in communication with a flow path to an outlet. The flow path includes two normally-closed valves and a flow restriction. A pressure measurement arrangement measures a differential fluid pressure between two points along the flow path which span at least part of the flow restriction, one of the points being between the valves. A controller selectively opens the valves to deliver a defined quantity of the liquid medicament to the outlet.

Integral intravenous fluid delivery device

A compact, integrated intravenous fluid delivery device. The invention may be used between an intravenous fluid source and an intravenous fluid line. In this embodiment, the invention includes a housing, through which a fluid passageway is disposed. The fluid passageway passes through a spike, which is used for connecting the housing to the fluid source. The passageway also passes through a rigid drip chamber and a priming element that may be repeatedly compressed in order to urge fluid from the source into the drip chamber and through the intravenous fluid line. The priming element includes a rigid base portion and a membrane. The spike, drip chamber and the base of the priming element all form an integral piece of rigid material. This embodiment may further include a valve chamber disposed in the housing, such that the fluid passageway enters and exits the chamber through two mouths. A valve membrane is attached to the housing and covers the valve chamber, so that the membrane may be urged to cover at least one of the two mouths.

Apparatus for detecting fluid line occlusion

An apparatus and method for detecting pressure and occlusion in a fluid line is for use with a fluid line being operated upon by a positive displacement, peristaltic pump having several cam follower fingers pressing against the fluid line fluid through the line peristaltically. A sensor follower finger is mounted to the cam shaft of the pump among the other peristaltic fingers in order to cyclicly press against the fluid line and displace the fluid line by a predetermined amount as the cam shaft rotates. The sensor follower finger includes a strain gauge mounted on the sensor finger to generate a signal indicating the degree of force being applied by the sensor finger against the tubing, and a signal processor which receives this force signal and determines the pressure within the fluid line based upon the signal. The signal processor determines the existence of an occlusion based on the signal and provides an alarm if an occlusion is determined.

Medical fluid delivery system with sensor device