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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 23. Отображено 23.
18-08-2016 дата публикации

METHOD AND APPARATUS FOR ATRIAL ARRHYTHMIA EPISODE DETECTION

Номер: US20160235315A1
Автор: Shantanu Sarkar, Daniel L. Hansen, Grant A. Neitzell, SARKAR SHANTANU, HANSEN DANIEL L, NEITZELL GRANT A, Sarkar Shantanu, Hansen Daniel L., Neitzell Grant A.
Принадлежит:

A method and medical device for determining a P-wave of a cardiac signal that includes sensing the cardiac signal, determining a P-wave sensing window in response to the sensed cardiac signal, the P-wave sensing window having a first portion and a second portion, determining signal characteristics of the sensed cardiac signal within the first portion and within the second portion, comparing the determined signal characteristics, and determining the P-wave in response to the comparing. 1. (canceled)2. A method of determining a P-wave of a cardiac signal in an implantable medical device , comprising:sensing the cardiac signal;identifying one or more R-waves within the cardiac signal;determining one or more P-wave sensing windows, wherein each of the P-wave sensing window is associated with one of the one or more identified R-waves;determining a characteristic P-wave sensing window based on the one or more determined P-wave sensing windows, the characteristic P-wave sensing window having a first portion and a second portion;determining a first derivative signal of the cardiac signal within the characteristic P-wave sensing window;determining a second derivative signal of the cardiac signal within the characteristic P-wave sensing window;analyzing the first derivative and the second derivative of the cardiac signal within the characteristic P-wave window to determine a first set of signal characteristics of the cardiac signal within the first portion of the characteristic P-wave sensing window and a second set of signal characteristics of the cardiac signal within the second portion of the characteristic P-wave sensing window, the signal characteristics including zero crossings of the first derivative signal and amplitudes of the second derivative signal corresponding to the determined zero crossings; anddetecting the P-wave based on the first and the second set of signal characteristics.3. The method of claim 2 , further comprising:determining a maximum amplitude of ...

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Номер записи: 1
18-08-2016 дата публикации

METHOD AND APPARATUS FOR ATRIAL ARRHYTHMIA EPISODE DETECTION

Номер: US20160235321A1
Автор: Shantanu Sarkar, Daniel L. Hansen, Grant A. Neitzell, SARKAR SHANTANU, HANSEN DANIEL L, NEITZELL GRANT A, Sarkar Shantanu, Hansen Daniel L., Neitzell Grant A.
Принадлежит:

A method and implantable medical device for determining a flutter event in response to a cardiac signal that includes sensing the cardiac signal, determining a sensing window in response to the sensed cardiac signal, the sensing window having a first portion and a second portion. A first derivative signal and a second derivative signal are determined in response to the sensed cardiac signal within the first portion and the second portion of the sensing window, and a sum of amplitudes of the second derivative signal within one or both of the first portion and the second portion of the sensing window is determined, and the flutter event is determined in response to the determined sum of amplitudes. 1. A method of determining a flutter event in response to a cardiac signal in an implantable medical device , comprising:sensing the cardiac signal;determining a sensing window in response to the sensed cardiac signal, the sensing window comprising a first portion and a second portion;determining a first derivative signal in response to the sensed cardiac signal within the first portion and the second portion of the sensing window;determining a second derivative signal in response to the sensed cardiac signal within the first portion and the second portion of the sensing window;determining a sum of amplitudes of the second derivative signal within one or both of the first portion and the second portion of the sensing window; anddetermining the flutter event in response to the determined sum of amplitudes.2. The method of claim 1 , further comprising:determining one of a relative difference within one of the first portion and the second portion of the sensing window, and a relative difference between the first portion and the second portion of the sensing window in response to the determined first derivative signal; anddetermining the flutter event in response to the determined sum of amplitudes and the determined relative difference.3. The method of claim 2 , further ...

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Номер записи: 2
18-08-2016 дата публикации

METHOD AND APPARATUS FOR ATRIAL ARRHYTHMIA EPISODE DETECTION

Номер: US20160235992A1
Автор: Shantanu Sarkar, Daniel L. Hansen, Grant A. Neitzell, Jerry D. Reiland, Ryan Wyszynski, SARKAR SHANTANU, HANSEN DANIEL L, NEITZELL GRANT A, REILAND JERRY D, WYSZYNSKI RYAN, Sarkar Shantanu, Hansen Daniel L., Neitzell Grant A., Reiland Jerry D., Wyszynski Ryan
Принадлежит:

A method and implantable medical device for determining an atrial arrhythmia event that includes sensing a cardiac signal, determining an atrial arrhythmia score for identifying the arrhythmia event in response to the sensed cardiac signal, determining a sensing window in response to the sensed cardiac signal, the sensing window having a first portion and a second portion, determining signal characteristics of the sensed cardiac signal within the first portion and within the second portion, determining whether the sensed cardiac signal within the first portion and within the second portion corresponds to a P-wave in response to the determined signal characteristics, determining whether a signal to noise ratio of the sensed cardiac signal within the first portion and the second portion of the sensing window is satisfied, determining whether to update the arrhythmia score in response to the determined P-wave and the determined signal to noise ratio, and determining whether to delivery an arrhythmia therapy in response to the updated arrhythmia score. 1. A method of determining an atrial arrhythmia event in an implantable medical device , comprising:sensing a cardiac signal;determining an atrial arrhythmia score for identifying the arrhythmia event in response to the sensed cardiac signal;determining a sensing window in response to the sensed cardiac signal, the sensing window having a first portion and a second portion;determining signal characteristics of the sensed cardiac signal within the first portion and within the second portion;determining whether the sensed cardiac signal within the first portion and within the second portion corresponds to a P-wave in response to the determined signal characteristics;determining whether a signal to noise ratio of the sensed cardiac signal within the first portion and the second portion of the sensing window is satisfied;determining whether to update the arrhythmia score in response to the determined P-wave and the determined ...

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Номер записи: 3
18-08-2016 дата публикации

METHOD AND APPARATUS FOR ADJUSTING A THRESHOLD DURING ATRIAL ARRHYTHMIA EPISODE DETECTION IN AN IMPLANTABLE MEDICAL DEVICE

Номер: US20160235317A1
Автор: Shantanu Sarkar, Daniel L. Hansen, Grant A. Neitzell, Jerry D. Reiland, Ryan Wyszynski, SARKAR SHANTANU, HANSEN DANIEL L, NEITZELL GRANT A, REILAND JERRY D, WYSZYNSKI RYAN, Sarkar Shantanu, Hansen Daniel L., Neitzell Grant A., Reiland Jerry D., Wyszynski Ryan
Принадлежит:

An implantable medical device and method for determining an atrial arrhythmia event that includes a cardiac sensing device comprising a housing having circuitry positioned therein, a plurality of electrodes electrically coupled to the circuitry to sense a cardiac signal, and a processor configured to generate an initial detection of an atrial arrhythmia event in response to an atrial arrhythmia threshold, determine whether a P-wave occurs during the initial detection, determine an adaptive threshold in response to the P-wave being detected, adjust the atrial arrhythmia threshold in response to the adaptive threshold, and generate a subsequent initial detection of an atrial arrhythmia event using the adjusted atrial arrhythmia threshold. 1. An implantable medical device for determining an atrial arrhythmia event , comprising:a cardiac sensing device comprising a housing having circuitry positioned therein;a plurality of electrodes electrically coupled to the circuitry to sense a cardiac signal; anda processor configured to generate an initial detection of an atrial arrhythmia event in response to an atrial arrhythmia threshold, determine whether a P-wave occurs during the initial detection, determine an adaptive threshold in response to the P-wave being detected, adjust the atrial arrhythmia threshold in response to the adaptive threshold, and generate a subsequent initial detection of an atrial arrhythmia event using the adjusted atrial arrhythmia threshold.2. The implantable medical device of claim 1 , wherein the atrial arrhythmia event comprises an atrial fibrillation event.3. The implantable medical device of claim 1 , wherein the processor is further configured to identify the initial detection as a false positive detection in response to a P-wave being detected claim 1 , increment an adjustment count in response to the initial detection being identified as a false positive detection claim 1 , and determine the adaptive threshold in response to the adjustment ...

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Номер записи: 4
18-08-2016 дата публикации

METHOD AND APPARATUS FOR ATRIAL ARRHYTHMIA EPISODE DETECTION

Номер: US20160235320A1
Автор: Shantanu Sarkar, Daniel L. Hansen, Grant A. Neitzell, SARKAR SHANTANU, HANSEN DANIEL L, NEITZELL GRANT A, Sarkar Shantanu, Hansen Daniel L., Neitzell Grant A.
Принадлежит:

A method and implantable medical device for determining noise in response to a cardiac signal that includes sensing the cardiac signal, determining a sensing window in response to the sensed cardiac signal, the sensing window comprising a first portion and a second portion, determining a first derivative signal in response to the sensed cardiac signal within only one of the first portion and the second portion of the sensing window, determining a second derivative signal in response to the sensed cardiac signal within the one of the first portion and the second portion of the sensing window, determining whether an amplitude of the second derivative signal satisfies an amplitude threshold, and determining noise in response to the amplitude of the second derivative signal satisfying the amplitude threshold. 1. A method of determining noise in response to a cardiac signal in an implantable medical device , comprising:sensing the cardiac signal;determining a sensing window within the sensed cardiac signal, the sensing window comprising a first portion and a second portion;determining a first derivative signal of the sensed cardiac signal within only one of the first portion and the second portion of the sensing window;determining a second derivative signal of the sensed cardiac signal within the one of the first portion and the second portion of the sensing window;determining whether an amplitude of the second derivative signal satisfies an amplitude threshold; anddetermining noise in response to the amplitude of the second derivative signal satisfying the amplitude threshold.2. The method of claim 1 , wherein the first derivative signal and the second derivative signal are determined within the first portion of the sensing window claim 1 , further comprising:determining positive and negative zero crossings of the first derivative signal within the first portion;determining whether a maximum amplitude of the second derivative signal at the positive zero crossings and a ...

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Номер записи: 5
01-08-2013 дата публикации

PACEMAKER EVENT QUEUE TO CONTROL DEVICE PROCESSOR OPERATING POWER

Номер: US20130198531A1
Автор: Ecker Robert M., Hansen Daniel L., Solheim Paul R.
Принадлежит: Medtronic, Inc.

In the present disclosure, conservation of an implantable medical device power supply of is facilitated by controlling the power consumption of the device's processing component. The power supplied to the processing component is controlled to enable processing of received events as a function of predetermined criteria rather than the actual occurrence of the events which is frequent, but irregular. Accordingly, the need for the processing component to start and stop (and thereby be fully powered on each start) with receipt of each event is obviated thereby maintaining the power consumption of the processing component and increasing longevity of the device. Event data associated with received events is stored in an event queue and subsequently retrieved and transmitted for processing based on predetermined criteria. The power supplied during an idle state of the processing component may be reduced in relation to the power supplied during a wake up state. 1. An implantable medical device having at least one integrated circuit comprising:a memory for storing event data associated with one or more received events;a control unit for processing the event data;an interrupt module for controlling transfer of the event data to the control unit; anda power supply for delivering power to the control unit at a first power level and a second power level, wherein one of the first power level and the second power level are delivered in response to a control signal generated by the interrupt module, andwherein the interrupt module is configured to generate the control signal for controlling the delivery of the first power level and the second power level triggered by transfer of the event data.2. The implantable medical device of claim 1 , wherein the memory comprises an event queue.3. The implantable medical device of claim 1 , wherein the interrupt module generates the control signal based on predetermined criteria.4. The implantable medical device of claim 3 , wherein the ...

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Номер записи: 6
10-04-2014 дата публикации

PACEMAKER EVENT QUEUE TO CONTROL DEVICE PROCESSOR OPERATING POWER

Номер: US20140100634A1
Автор: Ecker Robert M., Hansen Daniel L., Solheim Paul R.
Принадлежит: Medtronic, Inc.

In the present disclosure, conservation of an implantable medical device power supply of is facilitated by controlling the power consumption of the device's processing component. The power supplied to the processing component is controlled to enable processing of received events as a function of predetermined criteria rather than the actual occurrence of the events which is frequent, but irregular. Accordingly, the need for the processing component to start and stop (and thereby be fully powered on each start) with receipt of each event is obviated thereby maintaining the power consumption of the processing component and increasing longevity of the device. Event data associated with received events is stored in an event queue and subsequently retrieved and transmitted for processing based on predetermined criteria. The power supplied during an idle state of the processing component may be reduced in relation to the power supplied during a wake up state. 1. An implantable medical device having at least one power supply comprising:means for detecting an event;means for storing event data associated with the event;means for processing the event data;means for generating an interrupt signal based on predetermined criteria, wherein the event data is provided to the processing means based on the interrupt signal; andmeans for controlling an output of the power supplied to the processing means by the power supply based on the predetermined criteria.2. The implantable medical device of claim 1 , wherein the generating means comprises circuitry for comparing the number of stored events to a threshold and generating the interrupt signal based on the events exceeding the threshold.3. The implantable medical device of claim 1 , wherein the generating means comprises circuitry for identifying a given event and generating the interrupt signal based on a classification of the event.4. The implantable medical device of claim 1 , wherein the generating means monitors the expiration ...

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Номер записи: 7
01-02-2018 дата публикации

METHOD AND APPARATUS FOR ATRIAL ARRHYTHMIA EPISODE DETECTION

Номер: US20180028082A1
Автор: Hansen Daniel L., Neitzell Grant A., Reiland Jerry D., Sarkar Shantanu, Wyszynski Ryan
Принадлежит: Medtronic, Inc.

Techniques and devices for implementing the techniques for adjusting atrial arrhythmia detection based on analysis of one or more P-wave sensing windows associated with one or more R-waves. An implantable medical device may determine signal characteristics of the cardiac signal within the P-wave sensing window, determine whether the cardiac signal within the sensing window corresponds to a P-wave based on the determined signal characteristics, determine a signal to noise ratio of the cardiac signal within the sensing window, update the arrhythmia score when the P wave is identified in the sensing window and the determined signal to noise ratio satisfies a signal to noise threshold. 1. An implantable medical device for determining an atrial arrhythmia event within a cardiac signal , comprising:a plurality of electrodes configured to sense the cardiac signal; anda processor configured to identify one or more R-waves within the sensed cardiac signal, determine an atrial arrhythmia score for identifying the arrhythmia event based at least on the one or more R-waves, determine a sensing window associated with the one or more R-waves and having a first portion and a second portion, determine signal characteristics of the cardiac signal within the sensing window, determine whether the cardiac signal within the sensing window corresponds to a P-wave based on the determined signal characteristics, determine a signal to noise ratio of the cardiac signal within the sensing window, update the arrhythmia score when the P-wave is identified in the sensing window and the determined signal to noise ratio satisfies a signal to noise threshold.2. The medical device of claim 1 , wherein the processor is further configured to determine whether to delivery an arrhythmia therapy based on the updated arrhythmia score.3. The medical device of claim 1 , wherein the processor is further configured to determine a second derivative signal of the cardiac signal within the sensing window claim 1 ...

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Номер записи: 8
02-04-2020 дата публикации

METHOD AND APPARATUS FOR ATRIAL ARRHYTHMIA EPISODE DETECTION

Номер: US20200100694A1
Автор: Hansen Daniel L., Neitzell Grant A., Reiland Jerry D., Sarkar Shantanu, Wyszynski Ryan
Принадлежит:

Techniques and devices for implementing the techniques for adjusting atrial arrhythmia detection based on analysis of one or more P-wave sensing windows associated with one or more R-waves. An implantable medical device may determine signal characteristics of the cardiac signal within the P-wave sensing window, determine whether the cardiac signal within the sensing window corresponds to a P-wave based on the determined signal characteristics, determine a signal to noise ratio of the cardiac signal within the sensing window, update the arrhythmia score when the P-wave is identified in the sensing window and the determined signal to noise ratio satisfies a signal to noise threshold. 1. An implantable medical device for determining an atrial arrhythmia event within a cardiac signal , comprising:a plurality of electrodes configured to sense the cardiac signal; anda processor configured to identify one or more R-waves within the sensed cardiac signal, determine an atrial arrhythmia score for identifying the arrhythmia event based at least on the one or more R-waves, determine a sensing window associated with the one or more R-waves, determine signal characteristics of the cardiac signal within the sensing window, determine whether the cardiac signal within the sensing window corresponds to a P-wave based on the determined signal characteristics, determine a signal to noise ratio of the cardiac signal within the sensing window, update the arrhythmia score when the P-wave is identified in the sensing window and the determined signal to noise ratio satisfies a signal to noise threshold.2. The medical device of claim 1 , wherein the processor is further configured to determine whether to delivery an arrhythmia therapy based on the updated arrhythmia score.3. The medical device of claim 1 , wherein the processor is further configured to determine a second derivative signal of the cardiac signal within the sensing window claim 1 , determine a first maximum amplitude of the ...

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Номер записи: 9
20-06-2019 дата публикации

Pace pulse detector for a medical device

Номер: US20190183374A1
Автор: Daniel L. Hansen, Donna M. Salmi, James D. Reinke, Michael B. Terry, Scott A. Hareland, Vinod Sharma, Vladimir P. Nikolski, Xusheng Zhang
Принадлежит: MEDTRONIC INC

In situations in which an implantable medical device (e.g., a subcutaneous ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the subcutaneous ICD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the ICD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the ICD includes a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics and a second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics.

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Номер записи: 10
29-10-2015 дата публикации

IMPLANTABLE MEDICAL DEVICE (IMD) SENSING MODIFICATIONS RESPONSIVE TO DETECTED PACING PULSES

Номер: US20150305640A1
Автор: Hansen Daniel L., Hareland Scott A., Nikolski Vladimir P., Reinke James D., Salmi Donna M., Sharma Vinod, Terry Michael B., ZHANG Xusheng
Принадлежит:

In situations in which an implantable medical device (IMD) (e.g., an extravascular ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the IMD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the IMD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the IMD includes a pace pulse detector that detects, based on the processing of sensed electrical signals, delivery of a pacing pulse from a second implantable medical device and blank, based on the detection of the pacing pulse, the sensed electrical signal to remove the pacing pulse from the sensed electrical signal. 1. An implantable medical device comprising:a sensing channel that includes a plurality of components that process electrical signals sensed on an implantable electrical lead coupled to the implantable medical device;a pace pulse detector that detects pacing pulses delivered by a second implantable medical device based on the processing of the electrical signals sensed on the implantable electrical lead;a blanking module; anda blanking control module configured to, in response to pace pulse detector detecting the pacing pulse, cause the blanking module to blank the electrical signal of the sense channel to remove the pacing pulse from the sensed electrical signal.2. The device of claim 1 , wherein the pace pulse detector detects pacing pulses having amplitudes greater than or equal to four (4) millivolts and a pulse width of at least one (1) millisecond.3. The device of claim 1 , the blanking module holds the sensed electrical signal at a value of the sensed electrical signal prior to the pacing pulse to remove the pacing pulse from the sensed electrical signal.4. The device of claim 3 , wherein the blanking module ...

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Номер записи: 11
29-10-2015 дата публикации

PACE PULSE DETECTOR FOR AN IMPLANTABLE MEDICAL DEVICE

Номер: US20150305642A1
Автор: Hansen Daniel L., Hareland Scott A., Nikolski Vladimir P., Reinke James D., Salmi Donna M., Sharma Vinod, Terry Michael B., ZHANG Xusheng
Принадлежит:

In situations in which an implantable medical device (e.g., a subcutaneous ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the subcutaneous ICD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the ICD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the ICD includes a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics and a second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics. 1. An implantable medical device comprising:a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics; anda second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics.2. The device of claim 1 , wherein the first set of characteristics is a first amplitude and the first pace pulse detector includes a first threshold detector that detects the first type of pulses when an amplitude of the sensed electrical signal is greater than or equal to the first amplitude claim 1 , andwherein the second set of characteristics is a second amplitude, the second amplitude being less than the first amplitude, and the second pace pulse detector includes a second threshold detector that detects the second type of pulses when the amplitude of the sensed electrical signal is greater than or equal to ...

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Номер записи: 12
22-10-2019 дата публикации

Implantable medical device (IMD) sensing modifications responsive to detected pacing pulses

Номер: US10448855B2
Автор: Daniel L. Hansen, Donna M. Salmi, James D. Reinke, Michael B. Terry, Scott A. Hareland, Vinod Sharma, Vladimir P. Nikolski, Xusheng Zhang
Принадлежит: MEDTRONIC INC

In situations in which an implantable medical device (IMD) (e.g., an extravascular ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the IMD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the IMD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the IMD includes a pace pulse detector that detects, based on the processing of sensed electrical signals, delivery of a pacing pulse from a second implantable medical device and blank, based on the detection of the pacing pulse, the sensed electrical signal to remove the pacing pulse from the sensed electrical signal.

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Номер записи: 13
12-03-2019 дата публикации

Pace pulse detector for an implantable medical device

Номер: US10226197B2
Автор: Daniel L. Hansen, Donna M. Salmi, James D. Reinke, Michael B. Terry, Scott A. Hareland, Vinod Sharma, Vladimir P. Nikolski, Xusheng Zhang
Принадлежит: MEDTRONIC INC

In situations in which an implantable medical device (e.g., a subcutaneous ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the subcutaneous ICD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the ICD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the ICD includes a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics and a second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics.

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Номер записи: 14
01-06-2021 дата публикации

Pace pulse detector for a medical device

Номер: US11020038B2
Автор: Daniel L. Hansen, Donna M. Salmi, James D. Reinke, Michael B. Terry, Scott A. Hareland, Vinod Sharma, Vladimir P. Nikolski, Xusheng Zhang
Принадлежит: MEDTRONIC INC

In situations in which an implantable medical device (e.g., a subcutaneous ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the subcutaneous ICD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the ICD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the ICD includes a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics and a second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics.

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Номер записи: 15
21-01-2014 дата публикации

Pacemaker event queue to control device processor operating power

Номер: US8634914B2
Автор: Daniel L. Hansen, Paul R. Solheim, Robert M. Ecker
Принадлежит: MEDTRONIC INC

In the present disclosure, conservation of an implantable medical device power supply of is facilitated by controlling the power consumption of the device's processing component. The power supplied to the processing component is controlled to enable processing of received events as a function of predetermined criteria rather than the actual occurrence of the events which is frequent, but irregular. Accordingly, the need for the processing component to start and stop (and thereby be fully powered on each start) with receipt of each event is obviated thereby maintaining the power consumption of the processing component and increasing longevity of the device. Event data associated with received events is stored in an event queue and subsequently retrieved and transmitted for processing based on predetermined criteria. The power supplied during an idle state of the processing component may be reduced in relation to the power supplied during a wake up state.

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Номер записи: 16
13-06-2017 дата публикации

Method and apparatus for atrial arrhythmia episode detection

Номер: US9675269B2
Автор: Daniel L Hansen, Grant A Neitzell, Shantanu Sarkar
Принадлежит: MEDTRONIC INC

A method and implantable medical device for determining noise in response to a cardiac signal that includes sensing the cardiac signal, determining a sensing window in response to the sensed cardiac signal, the sensing window comprising a first portion and a second portion, determining a first derivative signal in response to the sensed cardiac signal within only one of the first portion and the second portion of the sensing window, determining a second derivative signal in response to the sensed cardiac signal within the one of the first portion and the second portion of the sensing window, determining whether an amplitude of the second derivative signal satisfies an amplitude threshold, and determining noise in response to the amplitude of the second derivative signal satisfying the amplitude threshold.

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Номер записи: 17
30-03-2023 дата публикации

Method and apparatus for atrial arrhythmia episode detection

Номер: US20230102092A1
Автор: Daniel L. Hansen, Grant A. NEITZELL, Jerry D. REILAND, Ryan D. WYSZYNSKI, Shantanu Sarkar
Принадлежит: MEDTRONIC INC

Techniques and devices for implementing the techniques for adjusting atrial arrhythmia detection based on analysis of one or more P-wave sensing windows associated with one or more R-waves. An implantable medical device may determine signal characteristics of the cardiac signal within the P-wave sensing window, determine whether the cardiac signal within the sensing window corresponds to a P-wave based on the determined signal characteristics, determine a signal to noise ratio of the cardiac signal within the sensing window, update the arrhythmia score when the P-wave is identified in the sensing window and the determined signal to noise ratio satisfies a signal to noise threshold.

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Номер записи: 18
03-09-2024 дата публикации

Pace pulse detector for a medical device

Номер: US12076153B2
Автор: Daniel L. Hansen, Donna M. Salmi, James D. Reinke, Michael B. Terry, Scott A. Hareland, Vinod Sharma, Vladimir P. Nikolski, Xusheng Zhang
Принадлежит: MEDTRONIC INC

In situations in which an implantable medical device (e.g., a subcutaneous ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the subcutaneous ICD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the ICD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the ICD includes a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics and a second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics.

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Номер записи: 19
08-05-2018 дата публикации

Method and apparatus for atrial arrhythmia episode detection

Номер: US09962102B2
Автор: Daniel L Hansen, Grant A Neitzell, Shantanu Sarkar
Принадлежит: MEDTRONIC INC

A method and implantable medical device for determining a flutter event in response to a cardiac signal that includes sensing the cardiac signal, determining a sensing window in response to the sensed cardiac signal, the sensing window having a first portion and a second portion. A first derivative signal and a second derivative signal are determined in response to the sensed cardiac signal within the first portion and the second portion of the sensing window, and a sum of amplitudes of the second derivative signal within one or both of the first portion and the second portion of the sensing window is determined, and the flutter event is determined in response to the determined sum of amplitudes.

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Номер записи: 20
10-04-2018 дата публикации

Method and apparatus for adjusting a threshold during atrial arrhythmia episode detection in an implantable medical device

Номер: US09936890B2
Автор: Daniel L Hansen, Grant A Neitzell, Jerry D Reiland, Ryan Wyszynski, Shantanu Sarkar
Принадлежит: MEDTRONIC INC

An implantable medical device and method for determining an atrial arrhythmia event that includes a cardiac sensing device comprising a housing having circuitry positioned therein, a plurality of electrodes electrically coupled to the circuitry to sense a cardiac signal, and a processor configured to generate an initial detection of an atrial arrhythmia event in response to an atrial arrhythmia threshold, determine whether a P-wave occurs during the initial detection, determine an adaptive threshold in response to the P-wave being detected, adjust the atrial arrhythmia threshold in response to the adaptive threshold, and generate a subsequent initial detection of an atrial arrhythmia event using the adjusted atrial arrhythmia threshold.

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Номер записи: 21
28-03-2017 дата публикации

Method and apparatus for atrial arrhythmia episode detection

Номер: US09603543B2
Автор: Daniel L Hansen, Grant A Neitzell, Jerry D Reiland, Ryan Wyszynski, Shantanu Sarkar
Принадлежит: MEDTRONIC INC

A method and implantable medical device for determining an atrial arrhythmia event that includes sensing a cardiac signal, determining an atrial arrhythmia score for identifying the arrhythmia event in response to the sensed cardiac signal, determining a sensing window in response to the sensed cardiac signal, the sensing window having a first portion and a second portion, determining signal characteristics of the sensed cardiac signal within the first portion and within the second portion, determining whether the sensed cardiac signal within the first portion and within the second portion corresponds to a P-wave in response to the determined signal characteristics, determining whether a signal to noise ratio of the sensed cardiac signal within the first portion and the second portion of the sensing window is satisfied, determining whether to update the arrhythmia score in response to the determined P-wave and the determined signal to noise ratio, and determining whether to delivery an arrhythmia therapy in response to the updated arrhythmia score.

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Номер записи: 22
08-11-2016 дата публикации

Method and apparatus for atrial arrhythmia episode detection

Номер: US09486155B2
Автор: Daniel L Hansen, Grant A Neitzell, Shantanu Sarkar
Принадлежит: MEDTRONIC INC

A method and medical device for determining a P-wave of a cardiac signal that includes sensing the cardiac signal, determining a P-wave sensing window in response to the sensed cardiac signal, the P-wave sensing window having a first portion and a second portion, determining signal characteristics of the sensed cardiac signal within the first portion and within the second portion, comparing the determined signal characteristics, and determining the P-wave in response to the comparing.

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Номер записи: 23