167 results about "Ventricular assistance" patented technology

A method is provided that includes inserting an inflow cannula of a left ventricular assist device (LVAD) of a LVAD system into a left chamber of a heart of a patient transeptally via a right atrium and a superior vena cava (SVC). An outflow cannula of the LVAD is coupled to a left subclavian artery or a left axillary artery. Other embodiments are also described.

A control method and control apparatus for a ventricular auxiliary apparatus and a ventricular auxiliary apparatus. The present invention pertains to the field of medical instruments. The ventricular auxiliary apparatus comprises a first component and is provided with a first control mode and a second control mode. The method comprises: acquiring a control operation for the first component, and controlling, in response to the control operation, the operation of the first component in a manner not restricted by constraints, wherein the constraints are constraints that apply when the first component operates in the second control mode. In the second control mode, the operation of the first component is restricted by the constraints, while in the first control mode, the operation of the first component is not restricted by the constraints. Compared to the second control mode, the first control mode masks the restriction of the operation parameters of the first component by the constraints, so that the degree of freedom of controlling the first component is improved, facilitating the adjustment and testing of the operation of the first component.

The invention discloses an air supply method and an air supply system for a pulsating type ventricular assist device. The air supply method comprises the following steps: setting working parameters of the pulsatile ventricular assist device; the stroke range of the piston in the air pump is determined according to the working parameters; obtaining a piston position piecewise function based on the stroke range; the piston is driven to be at the working zero point, the air pump communicates with the pre-inflation equipment through the pre-inflation pipeline, the air pump is inflated through the pre-inflation equipment, and air pump pressure initialization is completed; and the pre-inflation equipment is disconnected, the air pump is communicated with the pneumatic execution part through the air supply pipeline, a piston in the air pump reciprocates according to the determined piston position piecewise function, the pressure in the air pump is periodically changed, and the pneumatic execution part is periodically and intermittently driven to work according to the sequence of inflation, high-pressure keeping, deflation and low-pressure keeping. The problem of air supply of a balloon, an extracorporeal membrane cavity and the like of an existing pulsatile ventricular assist device is solved.

A ventricular assist device and a control system thereof, a console, an alarm method and a detection method. The ventricular assist device comprises a blood pump (1) and a control device (2) that are detachably connected. The control system comprises: a blood pump monitoring module (10) provided on the blood pump (1) and used for monitoring blood pump sensing data corresponding to the blood pump (1); a motor monitoring module (20) used for monitoring blood pump driving data corresponding to the blood pump (1), the blood pump monitoring module (10) being detachably connected to the motor monitoring module (20); a pump system control module (40) at least used for controlling the operation of the blood pump (1) and determining ventricular assist data corresponding to the blood pump (1) on the basis of the blood pump sensing data and / or the blood pump driving data; and a console control module (30) connected to the pump system control module (40) and used for processing a human-machine interaction operation and a system control operation of the control device (2). By simplifying the structure of consumables, the use cost of products is reduced.

The invention provides a self-adaptive control method and device for a double-ventricle auxiliary system. The method comprises the steps that target aortic pressure detected by a first pressure sensor, target left ventricular end diastolic pressure detected by a second pressure sensor, target right atrial pressure detected by a third pressure sensor and target pulmonary artery pressure detected by a fourth pressure sensor are obtained; and determining a strategy for adjusting the left ventricular assist device or the right ventricular assist device according to the target left ventricular end diastolic pressure, the target right ventricular pressure and the target pulmonary arterial pressure when the peripheral perfusion of the target user is insufficient or the lung is over-perfused. The pressure sensors are arranged to detect the pressure of the inlets and the outlets of the left ventricular assist device and the right ventricular assist device, whether adverse events such as peripheral insufficiency or pulmonary hyperperfusion occur to a user or not is judged according to the detected pressure, and then the adverse events are relieved or even solved by adjusting the rotating speeds of the left ventricular assist device and the right ventricular assist device. And the safety of the user is greatly improved.

The utility model discloses a control device and a ventricular assist system. The control device is applied to the ventricular assist system, the ventricular assist system comprises a blood pumping catheter, and the control device comprises a power supply assembly used for providing a working power supply for the blood pumping catheter; the interface assembly is used for detecting the connection state of the blood pumping catheter and the control equipment; the power conversion assembly is electrically connected with the power supply assembly; the controller, the power supply assembly, the interface assembly and the power supply conversion assembly are electrically connected with the controller, and the controller is used for obtaining configuration information of the blood pumping catheter under the condition that the connection state is successful, so that the power supply conversion assembly is controlled to convert a working power supply provided by the power supply assembly according to the configuration information; the configuration information comprises the working voltage of the blood pumping motor. According to the embodiment of the invention, the system adapts to the functional requirements of different blood pumping catheters, adapts to various types of blood pumping catheters, reduces the development tasks of control equipment, reduces the cost, and reduces the loss.

The invention provides a ventricular elasticity value estimation method and device.The method comprises the steps that a first parameter and a second parameter are obtained, the first parameter comprises at least one of target ventricular pressure, target aortic pressure and target pulmonary arterial pressure of a target user, and the second parameter comprises at least one of the target ventricular pressure, the target aortic pressure and the target pulmonary arterial pressure; the second parameter comprises the pumping flow of the target ventricular assist device and the cardiac cycle of the target user; inputting the first parameter and the second parameter into a target decision model, and outputting a target ventricular volume; and estimating a target ventricular elasticity value according to the ratio of the target ventricular pressure to the target ventricular volume. The ventricular volume of the current user is estimated through the decision model, the estimated ventricular elasticity value is calculated according to the ratio of the ventricular pressure to the ventricular volume, and the ventricular elasticity value of the patient can be accurately predicted in real time without depending on ultrasonic equipment.

A ventricular assist device including a frame having a proximal end and an outer surface, and an anchor having a base and a brace coupled to the base. The base is attached to the proximal end of the frame. The device also includes a stator assembly coupled to the frame, a rotor assembly disposed between the stator assembly and the frame, and a power source operatively coupled to the stator assembly. The anchor is moveable between a collapsed configuration in which an inner surface of the brace contacts the outer surface of the frame, and an expanded configuration, in which the inner surface of the brace is offset from the outer surface of the frame and an outer surface of the brace engages a portion of the blood vessel to secure the frame within the blood vessel.

Disclosed in the present application are a blood pumping device, a motor, and a ventricular assist device. The blood pumping device is used for pumping blood. The blood pumping device comprises a motor, a first pipe and a second pipe; the motor comprises a stator assembly, the stator assembly comprising a core, and the core enclosing to form an accommodating cavity; a first circulation cavity is formed in the core, and a second circulation cavity communicated with the first circulation cavity is formed in the core and / or in the accommodating cavity; the first pipe is communicated with the first circulation cavity, and the second pipe is communicated with the second circulation cavity; one of the first pipe and the second pipe serves as a perfusion pipe, and the other one serves as a backflow pipe; and the perfusion pipe is used for conveying a perfusate to the motor, and the backflow pipe is used for discharging the perfusate in the motor.

The application discloses a method, device and equipment for detecting the operation state of a ventricular assist device, and belongs to the technical field of medical instruments. The ventricular assist device comprises a driving device and an intervention pump. The driving device is used for driving the intervention pump to operate. The method comprises the following steps: acquiring current data of the driving device in a working state; in the case that the current data indicates that the load of the driving device is increased, performing operation state classification identification on the ventricular assist device according to the change condition of the current data in a first time period; and issuing alarm information corresponding to an identification result, wherein the identification result indicates an abnormal operation state causing the load increase. The method can timely prompt the cause of the abnormal load increase without the aid of a medical contrast imaging device, realizes automatic identification of the abnormal operation state, reduces the safety risk and protects the life safety of an assisted object, and reduces the radiation damage to the human body when the medical contrast imaging device is working.

Embodiments include Ventricular Assist Devices (VADs) with clips that help hold a cannula to the VAD. In some embodiments the clip embraces a cannula that has been placed around a cannula connector. In further embodiments an additional clip connects the first clip to the VAD housing preventing the first clip from slipping. The clip and additional clip may form a single piece. Further embodiments include a blood pumping sac located inside a cavity in the VAD forming one or more air chambers between the sac and the cavity walls, and an airflow channel leading from the air chambers to an airflow port allowing the sac to be evenly pressurized and depressurized.

The invention provides a working mode control device and method and a ventricular assist system, and relates to the field of control. The working mode control device is applied to ventricular assist device position monitoring equipment with a sensor. The working mode control device comprises an abnormity judgment module and a working mode switching module. The abnormity judgment module is used for judging whether the sensor is in an abnormal working state or not according to the working cavity length value of the sensor and the sensor reference data; and the working mode switching module is used for switching the working mode of the ventricular auxiliary device position monitoring equipment from the sensor mode to the sensorless mode under the condition that the sensor is in the abnormal working state. By using the working mode control device provided by the invention, the ventricular assist device position monitoring equipment can still work continuously under the condition that the sensor is abnormal, and when the working mode control device is used for controlling the ventricular assist device position monitoring equipment, the fault-tolerant capability of the whole ventricular assist system can be improved.

The application discloses a ventricular assist device adaptation degree evaluation method based on a knowledge graph neural network, and realizes intelligent evaluation of the adaptation degree of the ventricular assist device by building a knowledge graph neural network, training and optimizing the knowledge graph neural network, and forming an adaptation degree evaluation model; wherein the knowledge graph neural network comprises a single-modal graph network, a full-modal graph network, and a modal prediction fusion and output module. In the application, the graph attention completion model for missing feature prediction and the single-modal / full-modal fusion model for adaptation degree scoring can provide a unified and reproducible calculation approach for the ventricular assist device adaptation degree evaluation.

The invention relates to the technical field of medical instruments, and discloses a two-way valve and a ventricle assisting device. The two-way valve comprises a valve body, the valve body is of a tubular structure with a proximal end and a telecentric end, a window is formed in the side wall of one side of the valve body, and a first contact area is arranged on the edge of the end, close to the telecentric end, of the window on the inner side wall of the valve body; the valve clack is rotatably arranged in the valve body, a concave part is arranged on the side, facing the window, of a telecentric arc section of the valve clack, a valve clack contact area is arranged at the position, opposite to the first contact area, of the valve clack, and the valve clack can rotate between a first state position and a second state position relative to the valve body. The opening window is opened or closed. According to the technical scheme, when the valve clack rotates to the first state position, the blood outflow path is increased due to the concave part of the telecentric arc section of the valve clack, so that the blood outflow amount is further increased, and the effect of assisting in pumping out blood is improved.

The invention relates to the technical field of medical instruments, and particularly discloses a flushing fluid stent, a pressure detection system, an intrusive blood pump and a ventricular assist device. An artery pressure measuring pipeline inlet connector, an artery pressure measuring pipeline outlet connector, a communication channel, a flushing pipeline connector, a catheter installation connector and a flushing fluid cavity are integrally arranged on a flushing fluid support, and an artery pressure detection hole and a flushing fluid pressure detection hole are further formed in the flushing fluid support. The artery pressure sensor and the flushing fluid pressure sensor are arranged in the flushing fluid support, sensing of artery blood pressure and sensing of flushing fluid pressure are achieved, the difficulty of arranging an artery pressure measuring pipeline inlet connector, an artery pressure measuring pipeline outlet connector and a flushing pipeline connector is lowered, the structure of the driving catheter is simplified, and the driving catheter is more convenient to use. The integration level of the interventional blood pump structure is improved, pressure detection equipment does not need to be additionally intervened in the human body, the wound to the human body is small, the risk of surgical infection is reduced, and the operation steps of the surgery are simplified.

The invention relates to a ventricle connecting mechanism and a ventricle assisting system. The ventricle connecting mechanism comprises a suture ring, a clamping ring and a locking device, the suture ring is provided with a first through hole and a suture area surrounding the first through hole; the clamping ring comprises a ring body and a connecting end which are connected, the ring body is arranged on the suture ring, and the suture area is located on the periphery of the ring body. The locking device is connected to the connecting end part and can adjust the inner diameter of the ring body; the locking device can rotate relative to the connecting end part, so that the locking device can be switched between a horizontal state and an overturning state; in the horizontal state, the locking device is located on the periphery of the ring body and protrudes in the radial direction of the ring body. In the overturning state, one side, far away from the connecting end part, of the locking device is farther away from the sewing ring than in the flat placing state, so that the part, shielded by the locking device, of the sewing area is exposed. The locking device of the ventricle connecting mechanism can avoid a suturing area of a suturing ring, and uniform suturing of the suturing ring is facilitated.

The application provides a blood pump, comprising a pump shell and a pipe assembly, the pump shell is provided with a receiving cavity; the pipe assembly is installed on the pump shell, the pipe assembly is provided with a liquid inlet, the liquid inlet is communicated with the receiving cavity, the pipe assembly further comprises a flow guide structure and a liquid outlet pipe communicated with the receiving cavity, the flow guide structure extends from the outer circumferential surface of the liquid outlet pipe towards the liquid inlet. The blood pump provided by the application comprises a pump shell and a pipe assembly, the liquid inlet and the liquid outlet pipe of the pipe assembly are both communicated with the receiving cavity, the pipe assembly comprises a flow guide structure, the flow guide structure extends from the outer circumferential surface of the liquid outlet pipe towards the liquid inlet, the external liquid is smoothly guided to the liquid inlet, the probability of thrombosis caused by the blood staying in the area between the outer circumferential surface of the pipe assembly and the inner surface of the ventricular wall when flowing to the liquid inlet is reduced, the blood injury caused by the collision between the blood and the pipe assembly when flowing to the liquid inlet is reduced, and the safety performance of the blood pump in the blood pumping process is improved. The application further provides a ventricular assist system.

The application provides an interventional ventricular auxiliary oxygen generation device, a blood flow channel crosses an aortic valve into a left ventricle from an ascending aorta, a blood inlet of the blood flow channel is located in the left ventricle, a blood outlet is located in the ascending aorta, a first conveying pipe and a second conveying pipe convey hydrogen peroxide and catalase into the left ventricle to generate oxygen and water through reaction, and a pumping unit pumps oxygen-rich blood in the left ventricle to the ascending aorta. The oxygen generation function is added to the ventricular auxiliary device, the oxygen-rich blood in the ventricle is pumped to the ascending aorta through the ventricular auxiliary device, which directly improves the myocardial hypoxia condition and helps the heart recover, and on the other hand, the oxygen-rich blood is pumped into the ascending aorta and directly participates in the systemic circulation, thereby directly and quickly improving the oxygen supply condition of the systemic circulation.

Disclosed are a clamping mechanism (1) and a ventricle assistance system. The clamping mechanism (1) comprises a clamping ring (100) and a locking assembly (130). The clamping ring (100) comprises a ring body (110) and limiting latch (120). The ring body (110) is provided with an opening (114) and has a first end (118) and a second end (116) opposite each other. The first end (118) and the second end (116) are spaced apart to form the opening (114). The limiting latch (120) is arranged at the first end (118). The locking assembly (130) comprises a handle (131) and a connecting arm (133). The handle (131) is rotatably connected to the second end (116). One end of the connecting arm (133) is rotatably connected to the handle (131), and the other end thereof is provided with a movable latch (1332). The movable latch (1332) engages with a limiting latch hole (126) of the limiting latch (120).

The invention provides a fluid pumping device and a ventricular assist device.The fluid pumping device comprises a gap flowing channel arranged in the fluid pumping device, and the gap flowing channel is provided with at least one connecting section; a first line is formed by a connecting line of centers of different overflowing cross sections at the upstream of any one of the connecting sections, and a second line is formed by a connecting line of centers of different overflowing cross sections at the downstream of any one of the connecting sections; when the fluid travels to the second line along the first line, the traveling direction variation is an acute angle or the traveling direction is not changed. The variable quantity of the flowing direction of the connecting section of the flow channel is restrained through the geometric structure, so that gas exhaust is facilitated, vortexes or flowing dead zones are effectively eliminated, and gas is exhausted out of the fluid pumping device along with forward flowing of fluid.

The application discloses a kind of based on deep learning's implantation ventricular assist device operation monitoring method, comprising the following steps: collection ventricular assist device operation related multi-source time series monitoring data;Build including basic monitoring module and accurate monitoring module operation state prediction model;Basic monitoring module includes cascaded local feature extraction module, feature summary module and first classification module;Fine monitoring module includes high-frequency time series data feature extraction module, low-frequency asynchronous data condition coding module, fusion module and second classification module.Analysis is carried out to real-time monitoring data using operation state prediction model, and the current operation state information of ventricular assist device is output.The method of the present application has the advantages of timely fault warning, high recognition accuracy, strong model generalization, etc., and can realize dynamic monitoring and intelligent diagnosis of the operation state of ventricular assist device.

The application discloses a self-adaptive vena cava occlusion balloon ventricular assist system, which comprises a balloon catheter device and a control device. The balloon catheter device comprises a catheter, a balloon arranged on the catheter and close to the proximal end of the catheter, and a joint arranged on the distal end of the catheter. The catheter is provided with a first pressure cavity, a second pressure cavity and a liquid delivery cavity. The first pressure cavity is used for connecting the first blood pressure measuring port and the joint and is connected with the first blood pressure sensor through a first catheter. The second pressure cavity is arranged on the catheter in a lengthwise direction and is used for connecting the second blood pressure measuring port and the joint and is connected with the second blood pressure sensor through a second catheter. The liquid delivery cavity is used for connecting the inside of the balloon and the joint and is connected with a liquid delivery pump through a liquid delivery catheter. A micro pressure sensor is attached to the outer wall of the balloon, and a signal line led out from the micro pressure sensor is connected with a signal acquisition module through a signal extension line. The application can adjust the pressure of the balloon on the blood vessel wall during occlusion according to the change of the vena cava diameter, improve the occlusion effect and avoid damaging the blood vessel.

The application relates to the technical field of medical devices, and provides a bidirectional valve and a ventricular assist intervention device. The bidirectional valve comprises a valve body, the valve body is a tubular structure with a proximal end and a distal end, a first window is formed in the side wall of the valve body, and the inner side wall of the area close to the distal end of the first window is provided with a thickened part; a valve clack is rotatably arranged in the valve body, and the valve clack can rotate between a first state position and a second state position; in the first state position, the valve clack closes the proximal end of the valve body, and the distal end is in communication with the first window; in the second state position, the valve clack closes the first window, and the valve clack abuts against the thickened part, and the proximal end is in communication with the distal end. According to the technical scheme, when the valve clack rotates to the second state position, the blood flow unstable area close to the first window area on the inner side of the main catheter can be avoided, so that the stability of the valve clack is improved, the shear stress of the bidirectional valve on the blood cells in the blood is optimized, hemolysis is reduced, and the influence on the assist intervention is small.

A removal plug device for attachment to a ventricular collar during removal of a ventricular assist device. A removal plug device includes a cap member and a retention assembly. The cover member includes a central portion and a peripheral portion surrounding the central portion. The peripheral portion is configured to engage a radially extending circumferential flange of the ventricular lantern ring to retain the cap member to the ventricular lantern ring. The retention assembly is configured to engage with the peripheral portion to retain the peripheral portion in engagement with the radially extending circumferential flange of the ventricular collar.

The utility model provides a transmission shaft of a left ventricle auxiliary device. The transmission shaft comprises a mandrel and a twisting shell arranged outside the mandrel in a sleeving mode. The near end of the mandrel is in transmission connection with a mandrel driving module of the driving control mechanism, and the far end of the mandrel is fixedly connected with the far end of a pump head impeller of the micro pump head. The near end of the twisting shell is in transmission connection with a twisting shell driving module of the driving control mechanism, the far end of the twisting shell is fixedly connected with the near end of a pump head impeller of the micro pump head, and the mandrel driving module drives the mandrel and the twisting shell to rotate synchronously so as to drive the far end and the near end of the pump head impeller to rotate together, so that the pump head impeller rotates at a fixed outer diameter; and driving the twisting shell to rotate relative to the mandrel through a twisting shell driving module so as to drive the near end of the pump head impeller to rotate relative to the far end, so that the pump head impeller is folded or unfolded. The transmission shaft provided by the utility model can reduce the overall volume of the micro pump head entering the body of a patient, so as to improve the use safety and convenience, and reduce the use cost of the whole auxiliary device at the same time.

The application relates to a perfusion guide device, a method, a ventricular assist system, a storage medium and equipment for a ventricular assist device, which comprises a pressure detection module, a state judgment module and an auxiliary confirmation module, wherein the pressure detection module is used for detecting the pipeline pressure after at least one pipeline exhaust operation is completed, the state judgment module is used for comparing the detected pressure value with a preset threshold value to identify the leakage or blockage state of the pipeline, and the auxiliary confirmation module is used for instructing to disconnect the connection between the perfusion pump and the catheter pump when it is confirmed that the reason for excluding the pipeline blockage cannot be confirmed, and is also used for controlling the infusion motor to drive the perfusion pump to operate at a preset rotating speed for a preset auxiliary confirmation time period, and judging whether the blockage is located in the perfusion pump pipeline or the catheter pump pipeline based on whether the measured pressure value during the operation exceeds the preset threshold value.

The utility model discloses a blood pumping device and a ventricular assist system.The blood pumping device comprises a motor and a perfusion tube, the motor comprises a machine shell, a rotor assembly and a far-end sealing cover, the machine shell defines a containing cavity, a first circulation pipeline is arranged in the machine shell, the far-end sealing cover is connected with the far end of the machine shell, and a first shaft hole penetrating in the axial direction is formed in the far-end sealing cover; the rotor assembly comprises a rotating shaft, at least part of the rotating shaft penetrates through the first shaft hole and extends out of the containing cavity, a gap between the rotating shaft and the contour surface of the first shaft hole forms a second circulation pipeline, and the second circulation pipeline communicates with the first circulation pipeline; the infusion tube is connected with the near end of the motor, and a third circulation pipeline communicated with the first circulation pipeline is arranged in the infusion tube; the flow Q1 of the first circulation pipeline, the flow Q2 of the second circulation pipeline and the flow Q3 of the third circulation pipeline meet the formula, wherein k1 belongs to (0, 2), k2 belongs to (0, 2), k3 belongs to (0, 2), and Qx belongs to [10, 50].

Used to control the rotational speed (n) of the non-pulsating ventricular assist device. VAD The control device (100) of the assisted heart (t) uses an event-based Bonnet control strategy, wherein the control device is configured to change the rotational speed (n) of the VAD (50) during the cardiac cycle of the assisted heart. VAD (t)) and by at least one trigger signal sequence (σ(t)) associated with at least one predetermined characteristic event in the cardiac cycle, the rotational speed (n) VAD The change in (t) is synchronized with the heartbeat. Furthermore, the VAD (50) for cardiac assistance includes a control device (100) for controlling the VAD, wherein the VAD is preferably, for example, a catheter-based, non-pulsating rotational blood pump.

The application relates to an air intake detection device, method, ventricular assist system, storage medium and equipment for a ventricular assist device, which comprises a pressure detection module, a data processing module and an air intake judgment module, wherein the pressure detection module is configured to detect pipeline pressure during perfusion; the data processing module is configured to determine a pressure difference in at least one sampling period, the sampling period starts at the beginning of a variable-speed operation and ends at the end of the variable-speed operation; the air intake judgment module is configured to perform air intake detection according to the sampled pipeline pressure data in the sampling period; and the air intake judgment module is further configured to judge that air intake exists in the pipeline when the pipeline pressure and / or the pressure difference meets preset air intake judgment conditions.