Split multilayer arterial uncovered stent

The invention provides a split multilayer arterial uncovered stent. The split multilayer arterial uncovered stent is applied to intracavitary therapy of complex aneurysms involving branch arteries and can be conveyed many times so as to decrease the velocity of blood flow in an aneurysm cavity and induce thrombosis in the aneurysm cavity. The split multilayer arterial uncovered stent comprises a first support and a second support. The first support comprises a first frame (1) of a spiral structure and a second frame (2) of a spiral structure, and the rotation direction of the spiral structure of the first frame (1) and the rotation direction of the spiral structure of the second frame (2) are opposite. The first support and the second support are attached to and overlaid with each other to form a net structure. The split multilayer arterial uncovered stent overcomes the shortcomings of a traditional stent-graft in aneurysm exclusion, and can decrease the velocity of the blood flow in the ...

Blood vessel model and blood circulation simulating device using same

The invention provides a blood vessel model used for simulating blood circulation, which is formed by processing a transparent or semitransparent material according to an aorta of the human body and is designed with a split structure which can be detached. The invention also provides a blood circulation simulation device, which comprises an experimental operation box, a liquid tank, a control main machine connected with the liquid tank for controlling the supply and discharge of simulative blood and the blood vessel model which is arranged in the experimental operation box and is in sealed communication with the liquid tank, wherein the experimental operation tank has an opening for minimally invasive appliance intervention, and the opening can be sealed. The blood vessel model and the blood circulation simulating device effectively solves the problems of high cost, invisible surgical process, difficult artery intervention surgical training and the like of the prior minimally invasive surgical ...

Purifying process of phosphoric acid produced via wet process

The present invention is the purifying process of phosphoric acid produced via wet process. The purifying process includes heat exchanging cooling and aging crystallization, and via the process, the impurity ion can separated completely and the deposited salt has large crystal grain for separation. The clarified bottom flow is solid-liquid separated with depositing centrifugal machine. The wet process phosphoric acid product has P2O5 greater than 52.0 %, Fe2O3+Al2O3 less than 2.5 %, SS less than 1.0% and MgO less than 1.0%.

Delivery system for branched stent graft

A delivery system for a branched stent graft comprises a double-layer sheath (3, 13) containing the stent graft and an introducing release mechanism which introduces and releases the stent graft from the double-layer sheath (3, 13). After being bound, a trunk graft (8) and a branch graft (11) of the stent graft are movably and entirely positioned within the double-layer sheath (3, 13). The trunk graft (8) is connected with a guiding control assembly which introduces and releases the trunk graft (8). The branch graft (11) is introduced by a branch guiding assembly and connected with the guiding control assembly so as to be released by the guiding control assembly.

Vascular surgery brachial artery paracentesis post-pressing hemostasis and elbow joint straightening device

The invention provides a vascular surgery brachial artery paracentesis post-pressing hemostasis and elbow joint straightening device which comprises a puncture point lacing assembly, a puncture point water filling and pressurizing assembly is arranged on the puncture point lacing assembly in a penetrating mode, and a puncture point pressing yarn pad assembly is arranged below the puncture point water filling and pressurizing assembly. The puncture point water-filling pressurization assembly comprises a water-filling balloon, the puncture point compression yarn pad assembly comprises an adsorption yarn pad, and the water-filling balloon is arranged corresponding to the puncture point through the adsorption yarn pad; the elbow joint straightening device fixing assembly comprises a first fixing plate for fixing elbow joint straightening, an elastic bandage and an elastic grip ball, and the elastic grip ball is connected with the first fixing plate. The elbow joint straightening device is fixed ...

System and method for toning pigments based on photographing

The invention relates to the field of pigment toning, in particular to a system and a method for toning pigments based on photographing. The system is characterized by comprising a camera, an image point color selection module, an R, G and B brightness extraction module, a function calculation module and an R, G and B three-primary-color pigment equal value display module. The invention has the benefits that the system and the method for toning the pigments based on photographing are provided; the camera is used for acquiring a target image, and a color point region on the target image is directly selected so as to calculate equal values of all participating pigments in a backstepping manner according to an expected color effect; the system and the method can be applied to textile toning, paint toning, drawing toning and the like. The method disclosed by the invention can be used for compiling software applied to intelligent equipment such as a computer and a mobile phone.

Combined ascending aortic intracavitary isolation implant

The invention relates to the technical field of medical devices, and in particular relates to a novel combined intracavitary isolation implant used for the treatment of ascending aortic dilatation diseases, which comprises a metal wire stent (1) and an artificial blood vessel (2) sutured or stuck on the inner side of the stent. The novel combined intracavitary isolation implant is characterized in that: the metal wire stent (1) is divided into the following two parts: a tubular part (11) and a protruding part (12); the tubular part is a Z-shaped stent with a coating and represents a curved bow which conforms to the physiological morphological characteristics of the ascending aorta, so that the stent can fit well with an arterial wall; the protruding part is a meshed naked stent with a spherical shape and can closely fit on the inner wall of the coronary sinus after being placed in the coronary sinus, so as to prevent the displacement of the coated stent of the tubular part. The combined ...

Sheath tube with protective umbrella

The invention provides a sheathing canal with a protective umbrella, which comprises a sheathing canal main body and a sheath core matched with the sheathing canal main body, a plurality of umbrella ribs are arranged in the sheathing canal main body, the umbrella ribs have elastic bending capability, one ends of all the umbrella ribs are connected with the protective umbrella, the other ends of all the umbrella ribs are connected with a movable push handle, and a channel enclosed by all the umbrella ribs is used for inserting the sheath core. A first groove is formed in the portion, close to the far end, of the sheath core, a second groove is formed in the inner ring of one end of the sheath tube body, and the protection umbrella is located in the space between the first groove and the second groove. One end of the protective umbrella away from the movable push handle is a front-end screen. The structure that the push handle is moved to control the protection umbrella is adopted, a surgeon ...

High-yield breeding method for ecological geese

The invention provides a high-yield breeding method for ecological geese, and relates to the technical field of high-yield breeding. The invention discloses a high-yield breeding method for ecological geese. The high-yield breeding method specifically comprises the following steps: S1, building a breeding farm; s2, gosling management; s3, medium goose management; s4, egg laying period management; s5, performing grazing management; s6, epidemic prevention. According to the breeding method, the goslings are specially managed and fed with high-nutrition feed, meanwhile, the feeding time is specially planned, it is guaranteed that the goslings can rapidly grow in the gosling period, the growth period of the goslings is shortened, meanwhile, management is conducted in the mating period, it is guaranteed that breeding goslings can efficiently mate with female goslings, a large number of goslings are obtained, and the breeding efficiency is improved. The scale of breeding points is enlarged, the ...

Cooling-water circulating method for wet phosphoric acid production process

The present invention discloses the cooling water circulating method in wet phosphoric acid production process. One hot water tank is set in some place higher than the water cooling tower inlet, so that the water out of the hot water tank can flow into the water cooling tower for cooling. Compared with available technology, the present invention has no underground channel, underground tank and hot water pump and thus has compact structure, small floor area and low cost.

Branched membrane-covered support conveying system and conveying method thereof

The invention provides a branched membrane-covered support conveying system comprising a double-layer sheath tube for containing a membrane-covered support and a towing and releasing mechanism for towing and releasing the membrane-covered support from the sheath tube, wherein a support main body and a support branch of the membrane-covered support are movably and integrally arranged in the double-layer sheath tube after being bounded; the support main body is connected with a control guiding part and is towed and released by the control guiding part; and the support branch is towed by a branched guiding part and is connected with the control guiding part, thereby being released by the control guiding part. The invention also provides a method for conveying the branched membrane-covered support into an arterial vessel. The conveying system can effectively ensure that the membrane-covered support is smoothly and safely conveyed into the arterial vessel, and can accurately position the support ...

DELIVERY SYSTEM FOR BRANCHED STENT GRAFT

A delivery system for a branched stent graft comprises a double-layer sheath (3, 13) containing the stent graft and a towing and releasing mechanism which tows and releases the stent graft from the double-layer sheath (3, 13). After being bound, a stent main body (8) and a stent branch (11) of the stent graft are movably and entirely positioned within the double-layer sheath (3, 13). The stent main body (8) is connected with a control guiding assembly and is towed and released by the control guiding assembly. The stent branch (11) is towed by a branch guiding assembly and is connected with the control guiding assembly, so as to be released by the control guiding assembly.

Leg type lower limb artificial vein valve

一种湿法磷酸净化处理方法

... 本发明公开了一种湿法磷酸的净化处理方法。该法采用换热冷却、陈化结晶，使得湿法浓磷酸中的杂质离子析出更完全，并增大所析出沉淀盐的结晶粒度，有利于澄清分离。澄清底流采用沉降式离心机实现液固分离，湿法磷酸产品的质量为P#-[2]O#-[5]≥52.0％，Fe#-[2]O#-[3]+Al#-[2]O#-[3]≤2.5％，SS≤1.0％，MgO≤1.0％，稳定达到国际通用标准。并且液固分离彻底，提高了产品酸收率30％以上。 ...

Isolation implant in abdominal aorta external and internal iliac artery cavity

The invention relates to a novel cavity isolation graft of abdominal aorta-internal iliac artery, which consists of a metal wire stent (1) and tubular fiber fabric (2) fixed in the stent. The graft is divided into a straight cylinder part (3) and a furcation part (4); the first Z-shaped stent circle of the upper end of the straight cylinder is not covered by the fabric, and the lower end of the straight cylinder is the furcation part which is provided with a long branch (4.1) and a short branch (4.2); the positions of the two branches are corresponded to the two sides of an external iliac artery; a length-added branch (6) can be inserted into the short branch; relevant parts of the metal wire stent are provided with metal markers (5) so that the graft can be pushed to a lesion part precisely by a conveyor under X line; the graft is characterized in that the long branch (4.1) is provided with an internal iliac artery branch (7); the length-added branch (6) of the short branch can also be ...

Vascular interventional instrument tracking method of interventional surgical robot based on DSA image sequence of Unet

The invention discloses a Unet-based vascular interventional instrument tracking method for a DSA image sequence of an interventional surgical robot, and the method comprises the steps: obtaining a plurality of groups of contrast frame data Icontraast and corresponding subtraction frame data Idsa, and enabling the data to serve as a training set of a convolutional network; the method comprises the following steps: establishing a U-net as a generator, inputting contrast frame data Icontrol in a training set into the generator, outputting corresponding blood vessel subtraction Idsa, updating network parameters by learning data of the training set, thereby reducing the Euclidean distance between the output blood vessel subtraction and the original blood vessel subtraction data Idsa, training the generator, and obtaining the blood vessel subtraction data Idsa. A target problem is divided into two sub-problems by learning an original data set and a generated data set updating discriminator parameter ...

High-yield breeding method for ecological pigs

The invention provides a high-yield breeding method for ecological pigs, and relates to the technical field of control systems. The invention relates to a high-yield breeding method for ecological pigs. The method specifically comprises the following steps: S1, building a pig farm; s2, laying ecological bed padding; s3, piglet selection; s4, feeding and stocking. According to the technology, the pigs are bred in the pig house, padding containing microorganisms is laid on the ground of the pig house, pig manure and urine are decomposed and converted into organic matter and mycoprotein which can be eaten by the pigs through the microorganisms, the pigs can eat feed containing microbial beneficial bacteria through arch feeding, the balance of intestinal flora is greatly improved, the disease resistance is obviously enhanced, and the breeding efficiency is improved. In addition, in the production process of the mode, excrement is not discharged outwards, the problem of traditional intensive ...

Method for preparing sulphuric acid by baking sulphur in fluidized-bed furnace

The preparation of sulfuric acid by roasting sulfur in fluidizing reactor is characterized by that the sulfur and other materials are mixed by adding water and fed into the fluidizing reactor, in thefluidizing reactor sulfur content is controlled to 30-50%, and water content is 5-12%, and all the materials are boiled and burnt in the reactor, and fully reacted with oxygen in the air to produce sulfur dioxide, then the gas containing sulfur dioxide is treated for removing dust, then fed into the purfication procedure, through contact process, to obtain sulfuric acid. The slag recovered by slag-discharge system can be returned into preparation procedure of raw material, and mixed with sulfur, can be reused to produce sulfuric acid. Said invention possesses strong adaptability, high production capacity, and can reduce environmental pollution.

一种餐饮废物生产蛋白饲料的方法

The invention refers to a restaurant waste processing method to produce protein feed. Make the waste in store tank pass through separating tank to get processable substance, then send to the cooker with pressure 0.1-0.7MPa and temperature 50-90íµ to cook for 10-30 minutes, then enter the presser to degrease and dewater, then send to the drier with interlayerí»s temperature 100-150íµ, then screening by the vibrational screen to enter the muller to make the feed. It concentrates all the restaurant waste foe processing and can not produce pollution.

Extractor for wet-process phosphoric acid

The extractor for wet process phosphoric acid has cubical digestion tank and integrated extracting tanks and digestion tanks, each of which is squared tank with circular inner wall possessing vertical anti-corrosive tiles. The extractor has compact and reasonable structure, low cost and low power consumption.

Device and method for capacitive and inductive anti-separation electricity taking of audio signals

The invention relates to the field of data safety, in particular to a device and method for capacitive and inductive anti-separation electricity taking of audio signals. The device and method are used for electricity taking of an audio U-shield. The device and method are characterized in that a bypass capacitor is connected with a rectifying circuit, the rectifying circuit is connected with an energy storage capacitor, the energy storage capacitor is connected with a voltage stabilizing circuit, the voltage stabilizing circuit is connected with a U-shield circuit, and an inductor is connected with the RX end of the U-shield; the audio signals are composed of high-frequency power supply signals and low-frequency data signals in a superposition mode; the bypass capacitor bypasses the high-frequency power supply signals to the rectifying circuit, the rectifying circuit is in charge of converting the high-frequency power supply signals into direct currents and storing the direct currents into ...

一种湿法磷酸的萃取装置

... 本发明公开了一种湿法磷酸的萃取装置。该装置消化槽的平面采用立方体，并将萃取槽与多级消化槽建造为一个整体，各个萃取槽与消化槽均为单元方格槽，各个单元方格槽四周内壁为圆弧形结构。各个单元方格槽内壁所衬防腐砖为立砌。该装置结构紧凑合理，投资费用低，节约生产用电。 ...

Voice frequency signal frequency-selecting electricity-taking device and method

The invention relates to the field of data safety, in particular to a voice frequency signal frequency-selecting electricity-taking device and method, wherein the voice frequency signal frequency-selecting electricity-taking device and method are used for electricity taking of a voice frequency USBkey. The voice frequency signal frequency-selecting electricity-taking device and method are characterized in that a frequency-selector is connected with a rectifying circuit, the rectifying circuit is connected with a capacitor, the capacitor is connected with a voltage stabilizing circuit, the voltage stabilizing circuit is connected with a USBkey circuit, a double-voice-frequency demodulation unit is connected with a signal receiving end RX of the USBkey circuit, the frequency-selector selects out a power supply signal of a specific frequency and provides the power supply signal to the rectifying circuit, the rectifying circuit is responsible for converting the power supply signal of the specific ...

Leg type lower limb artificial vein valve

An artificial scaffold-type venous valve for treating the revese flow phlebocholosis of lower extremity and phlebostenosis is composed of the artificial vein with the said artificial valve on its inner surface and the metallic scaffold attached to outer surface of artificial vein. Its advantages are high tissue compatibility, and low cost.

Out-reactor dilution of sulfuric acid in wet process producing phosphoric acid

Outside the reactor, are set up one diluting and heat exchanging apparatus and two distribution regulators. Concentrated sulfuric acid of 93-98% concentration is distributed by the sulfuric acid distributor and then mixed with and diluted by the diluting material distributed by the diluting material distributor, and the diluted sulfuric acid is cooled to 70-74 deg.C before entering the reactor. Transfering the dilution heat outside the reactor can reduce the heat load of the reactor, improve gypsum crystallization and raise production capacity.

Arteria blood turning tube with fixing structure

The invention relates to the technical field of medical devices, which is an arteri-blood flow diverting pipe with fixed structure and for first aid of limb blood vessel wounds. The invention consists of a blood flow diverting pipe (1) and a fixed structure; pipe tops on both ends of the blood flow diverting pipe are inclined; a color strip with calibration can be arranged longitudinally on the pipe wall of the blood flow diverting pipe (1). A self-sticking blood stopper film can be coated on the pipe wall of the middle section of the blood flow diverting pipe; the fixed structure consists of two saccules (2) or two fixed rings (3); each saccule (2) consists of a saccule body (2.1), a saccule pipe (2.2) and an air supply valve (2.3); the two saccules bodies are respectively wrapped on the pipes on both ends of the blood flow diverting pipe; the fixed rings (3) are pipe wall circular heaves on both ends of the blood flow diverting pipe. The invention has the advantages of simple structure ...

Multistage closed wet phosphate rock grinding process

The multistage closed wet phosphate rock grinding process combines rod milling and ball milling, and includes the first section rod milling, the second section ball milling, inclined plate grading and densifying. The rod milling raises the rock grinding selectivity; the inclined plate grading machine results in high grading quality and efficiency and less over-milling; and the densifying machine of stepped overflow reaches the required density.

Cooling-water circulating method for wet phosphoric acid production process

Out-reactor dilution of sulfuric acid in wet process producing phosphoric acid

Method for preparing sulphuric acid by baking sulphur in fluidized-bed furnace

Improved wet dihydrate phosphoric acid producing process

The improved wet dihydrate phosphoric acid producing process has sodium dodecanol sulfate and sodium dodecyl benzene sulfoante in certain ratio are first compounded into water solution of 2-30 wt% concentration, and then added into phosphoric acid, with the added amount being 30-300 ppm. The addition of the water solution of sodium dodecanol sulfate and sodium dodecyl benzene sulfoante in the extraction step and concentration step of wet phosphoric acid production can reduce the scaling in production apparatus and pipeline obviously, and can also raise concentration evaporating strength and apparatus capacity and lower concentrated steam consumption.

Multistage closed wet phosphate rock grinding process

Ascending aortic stent graft

Disclosed herein is a stent graft for ascending aorta, comprising a stent; a cover attachment at least partially covering the stent; a valve leaflet for reconstructing aortic valves, which are positioned at the proximal end of the stent and attached to the cover attachment and the stent. The valve leaflet for reconstructing aortic valves is configured to allow blood to flow from the left ventricle to the aorta and prevent blood from flowing from the aorta back to the left ventricle. In addition, the stent graft has two windows aligning with two openings of the coronary artery. Therefore, for the aortic root diseases involving aortic sinus and aortic valves, the stent graft for ascending aorta can be implanted into ascending aortic root by minimally invasive endovascular surgery to repair the ascending aorta lesions and reconstruct the aortic valves, aortic sinus, openings of the coronary artery, thereby achieving overall cure.

Vascular intervention robot operating handle with guide wire catheter advancing resistance feedback

Biplane robotic arm device suitable for vascular interventional surgery

Operating handle with feedback of guidewire/catheter advancement resistance for vascular intervention robot

Ascending aortic stent graft

Disclosed herein is a stent graft for ascending aorta, comprising a stent; a cover attachment at least partially covering the stent; a valve leaflet for reconstructing aortic valves, which are positioned at the proximal end of the stent and attached to the cover attachment and the stent. The valve leaflet for reconstructing aortic valves is configured to allow blood to flow from the left ventricle to the aorta and prevent blood from flowing from the aorta back to the left ventricle. In addition, the stent graft has two windows aligning with two openings of the coronary artery. Therefore, for the aortic root diseases involving aortic sinus and aortic valves, the stent graft for ascending aorta can be implanted into ascending aortic root by minimally invasive endovascular surgery to repair the ascending aorta lesions and reconstruct the aortic valves, aortic sinus, openings of the coronary artery, thereby achieving overall cure.

Biplane robotic arm device suitable for vascular interventional surgery

Operating handle with feedback of guidewire/catheter advancement resistance for vascular intervention robot

Oclusor y sistema de oclusión

La presente solicitud está relacionada con un oclusor y un sistema de oclusión. El oclusor incluye un cuerpo que incluye un alambre formable y una bobina de resorte, donde el alambre formable está formado por un alambre de metal resiliente y configurado para tener una forma predeterminada, y la bobina de resorte recubre el alambre formable para darle al cuerpo la forma predeterminada. Al mantener la forma del cuerpo mediante el alambre formable, el cuerpo puede bloquear efectivamente la rasgadura en los tratamientos para la disección aórtica.

Elastic gathered self-centering panel clamping mechanical finger for blood vessel intervention

Occluder and system

An occluder (100) and system. The occluder (100) includes a body (110) including a shaping wire (111) and a spring coil (112), the shaping wire (111) formed by a resilient metal wire and configured to have a predetermined shape, the spring coil (112) sleeved on the shaping wire (111) in order to shape the body (110) with the predetermined shape. Through maintaining the shape of the body (110) by means of the shaping wire (111), the body (110) is able to effectively block the breach (30) in aortic dissection treatments.

Oclusor e sistema

OCLUSOR E SISTEMA. A presente invenção refere-se a um oclusor (100) e um sistema. O oclusor (100) inclui um corpo (110) incluindo um fio de modelagem (111) e uma mola helicoidal (112), o fio de modelagem (111) formado por um fio de metal resiliente e configurado para ter uma forma predeterminada, a mola helicoidal (112) enrolada no fio de modelagem (111) para moldar o corpo (110) com a forma predeterminada. Através da manutenção da forma do corpo (110) por meio do fio de modelagem (111), o corpo (110) é capaz de bloquear efetivamente a ruptura (30) em tratamentos de dissecção aórtica.

Bi-planar robotic arm device for vascular interventional surgery

A bi-planar robotic arm device for vascular interventional surgery includes an operating table, a frame assembly, an outer arm assembly, and an inner arm assembly. The frame assembly includes a standing column, a sliding block, a sliding platform, a support, and a screw stepper motor. The standing column is arranged on the operating table. The support is arranged on the standing column. The sliding platform is arranged on the support. The sliding platform is connected to the sliding block. The sliding block is connected to the screw stepper motor and can slide along the sliding platform under the action of the screw stepper motor. The outer arm assembly is connected to the standing column. The inner arm assembly is connected to the outer arm assembly and the sliding block. The inner arm assembly and the outer arm assembly can move relative to each other.

Biplane robotic arm device suitable for vascular interventional surgery