337 results about "Ventricular assistance" patented technology

The invention relates to a method for operating an implanted, ventricular assist system (2), comprising the following steps: a) determine a first impedance parameter at a first point in time by means of the assist system (2), b) determine a second impedance parameter at a second point in time by means of the assist system (2), c) at least determine a change of the impedance parameter using the first impedance parameter and the second impedance parameter, or compare at least the first or second impedance parameter to a threshold value.

Apparatus and methods are described including a ventricular assist device that includes a frame having struts that define a plurality of cells. In its non-radially-constrained configuration, the frame includes a generally cylindrical portion. A tube defines blood outlet openings, and a portion of the tube is disposed outside the frame and is coupled to the generally cylindrical portion of the frame, such that the portion of the tube conforms with a structure of struts of the frame. An inner lining is coupled to an inside of the generally cylindrical portion of the frame, such as to provide the generally cylindrical portion of the frame with a smooth inner surface. An impeller is disposed at least partially inside the generally cylindrical portion of the frame and is configured to pump blood through the tube and out of the one of more blood outlet openings. Other applications are also described.

The invention relates to an electronics module (102) for a ventricular assist device, wherein the ventricular assist device has a motor housing for accommodating a pump motor. The electronics module (102) comprises an electronics section (204) for accommodating at least one electronic component (206) and / or at least one electrically conductive contacting element (208), and a coupling section (202) designed as a joint between the motor housing (104) and the electronics section (204) or as a separate component to be joined, wherein the motor housing (104) and the electronics section (204) are combined or can be combined via the coupling section (202) with one another to form a fluid-tight module housing (104) to be arranged in a blood vessel.

Apparatus and methods are described including delivering a left-ventricular assist device to a subject's aorta. The device including a distal-tip element that defines a straight proximal portion, and a curved distal portion, the curved distal portion defining first and second curves with an elongated straight portion between the first and second curves. The distal-tip element is centered with respect to the aortic valve using the curved distal portion of the distal-tip element, to thereby guide the device through the subject's aortic valve atraumatically. A pump pumps blood through from the subject's left ventricle to the subject's aorta. Other applications are also described.

Apparatus and methods are described including delivering a left-ventricular assist device to a subject's left ventricle. A tube is positioned such that a proximal portion of the tube traverses an aortic valve of the subject, and a distal portion of the tube is disposed within a left ventricle of the subject. A pump pumps blood through the tube from the subject's left ventricle to the subject's aorta such as to cause the proximal portion of the tube to be maintained in an open state, and to cause at least a portion of the tube to become curved. Other applications are also described.

The invention relates to the technical field of heart blood pumps, in particular to a passive ventricular auxiliary circulation device. Comprising a motor body shell, a stator and a rotor are arranged in the motor body shell, and one of the stator and the rotor comprises a coil; the axial flow channel shell is sleeved; the upper end of the axial flow channel shell is configured to face the aortic valve to the lower part of the ventricle, and a power supply configured to be operably coupled to the coil; and the controller is configured to be operated and coupled to the power supply to select and control the power supply to change the rotor to a certain rotating speed in a manual selection mode, then the rotor keeps working in a certain rotating speed mode, and corresponding auxiliary pressure output by the fluid outlet interface is configured at a different rotating speed. The device is controlled to be in a rotating speed state, and when systolic pressure smaller than normal systolic pressure is provided for cardiac pulsation of a heart failure patient, the normal systolic pressure is provided when the systolic pressure and auxiliary pressure are overlapped together, so that the heart failure patient maintains the normal systolic pressure.

Apparatus and methods are described including a ventricular assist device that includes an impeller configured to be placed inside a left ventricle of a subject. A driving magnet is coupled to a motor and is rotated by the motor. A driven magnet is magnetically coupled to the driving magnet and is rotated by the driving magnet. A drive cable extends from the driven magnet and imparts rotational motion from the driven magnet to the impeller. A set of sensors is configured to detect a magnetic phase difference between the driven magnet and the driving magnet. A computer processor receives the detected magnetic phase difference and determines a physiological parameter of the subject, at least partially in response thereto. Other applications are also described.

The invention relates to an apparatus (100) for anchoring a ventricular assist system in a blood vessel, the apparatus (100) being able to assume an insertion state for insertion of the ventricular assist system into the blood vessel, and the apparatus (100) being able to assume an anchoring state in order to anchor the ventricular assist system in the blood vessel. The apparatus (100) has at least one fixing means (105) for fixing the apparatus (100) to the ventricular assist system (205), a crown (110) and a connection means (115). The crown (110) is formed from at least one unfolding element (120). The unfolding element (120) is designed to unfold during the transfer from the insertion state into the anchoring state in order to enlarge the diameter of the crown (110) so as to anchor the apparatus (100) in the blood vessel. The connection means (115) is designed to connect the crown (110) to the fixing means (105).

The invention relates to the technical field of heart blood pumps, in particular to a valve and pump integrated tandem type ventricular auxiliary circulation device. Comprising a ventricular auxiliary circulating pump device and a ventricular auxiliary circulating valve device, the ventricular auxiliary circulating pump device is provided with an axial flow channel shell (3) and a power part arranged in the axial flow channel shell (3); the ventricular auxiliary circulation valve device is provided with a tubular metal support body (100), and the metal support body comprises a plurality of longitudinal supporting columns; the upper end of the axial flow channel shell (3) is provided with a flanging part (31) which is outward in the radial direction, and the longitudinal supporting column lower tail end (101) of the longitudinal supporting column is assembled, contacted and fixed to the flanging part (31). A supporting system and a heat dissipation system are constructed to be of the same path structure, and the heat dissipation effect is improved on the basis that the structure is reduced.

A control device (100) for controlling the rotational speed (nVAD(t)) of a non-pulsatile ventricular assist device, VAD, (50) uses an event-based within-a-beat control strategy, wherein the control device is configured to alter the rotational speed of the VAD within the cardiac cycle of the assisted heart and to synchronize the alteration of the rotational speed with the heartbeat by at least one sequence of trigger signals (σ(t)) that is related to at least one predetermined characteristic event in the cardiac cycle. Further, a VAD (50) for assistance of a heart comprises the control device (100) for controlling the VAD, wherein the VAD is preferably a non-pulsatile rotational, for example catheter-based, blood pump.

A two-way valve and a pulsatile percutaneous ventricular assist device using same. The two-way valve comprises: a valve body (1) with an inner cavity (10) passing through, the inner cavity being provided with a proximal port (1a) and a distal port (1b), and the valve body (1) being provided with an open window (1c) in communication with the inner cavity (10) and the outside of the valve body (1); and a valve flap (2) arranged in the inner cavity (10) and rotationally connected to the valve body (1), the valve flap (2) comprising a first valve leaf (21), a second valve leaf (22), and a third valve leaf (23), which are connected at an obtuse angle, the first valve leaf (21) being arranged at the open window (1c), the second valve leaf (22) being arranged on one side close to the inner cavity (10) at one end of the first valve leaf (21) close to the proximal port (1a), and the third valve leaf (23) being arranged on one side close to the inner cavity at one end of the first valve leaf close to the distal port (1b). The valve flap (2) is impacted by blood flow axially flowing in the inner cavity (10) and is rotationally switched back and forth between an open position and a closed position. In the open position, the three valve leaves together partition the proximal port (1a) and the distal port (1b), and the open window (1c) is opened and in communication with the distal port (1b). In the closed position, the first valve leaf (21) closes the open window (1c), and the proximal port (1a) is in communication with the distal port (1b), thereby achieving better switching response and sealing effects.

The invention relates to an adapter, a connecting assembly and a ventricular assist system. The adapter comprises a shell, a circuit board and a cable assembly. The shell is provided with an accommodating cavity and two connecting ends positioned on the shell, and the two connecting ends can be connected with a connector; the circuit board is arranged in the accommodating cavity of the shell, the circuit board comprises two side plate bodies which are spaced from each other, and the two side plate bodies correspond to the two connecting ends respectively and can be electrically connected with the connectors connected to the connecting ends; the cable assembly is fixedly connected with the shell, the cable assembly comprises a connecting line, and the connecting line is electrically connected with the circuit board. The adapter has high signal transmission performance, the operation stability of the ventricular auxiliary system can be improved, and then the operation reliability of the ventricular auxiliary system is improved.

A method for providing a treatment recommendation to a physician for treating a patient is disclosed. The method comprises determining, from a processor in communication with a patient data repository, a first treatment recommendation based on a combination of selected patient demographics from the patient data repository applicable to the patient, and operational parameters of a plurality of ventricular assist devices (VADs) suitable for treating the patient, the first treatment recommendation having a first survival rate and comprising the use of a first VAD. The method then obtains a first signal from using the first VAD on the patient. The method then determines a second treatment recommendation based on the first signal and the first treatment recommendation, the second treatment recommendation having a second survival rate. The method then provides the second treatment recommendation to the physician if the second survival rate is higher than the first survival rate.

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.

The invention relates to a heart premature beat detection device and method, a ventricular assist system, a storage medium and equipment, and the detection device comprises a first sampling module which is configured to collect operation data of a drive motor in a ventricular assist device, and the operation data at least comprise rotation speed data; the calculation module is configured to determine a current rotating speed maximum value and a historical average maximum value according to the rotating speed data; the judgment module is configured to judge that premature beat occurs when the current rotating speed maximum value is larger than the gear rotating speed and smaller than the historical average maximum value. Compared with a traditional premature beat detection mode, premature beat detection can be carried out in real time in the operation process of the percutaneous ventricular auxiliary device, and traditional external monitoring equipment such as electrocardiogram or color Doppler ultrasound does not need to be relied on any more.

The utility model relates to a catheter type ventricular assist system which can provide different flows and is small in trauma, and comprises a single-channel double-cavity cannula and a single-channel single-cavity cannula, the single-channel double-cavity cannula comprises an inner tube and an outer tube, the near end of the inner tube is communicated with an inlet tube of a blood pump, and an outlet tube of the blood pump is communicated with the near end of the outer tube or the near end of the single-channel single-cavity cannula. Blood is sucked in from the blood inflow port at the far end of the inner tube and flows out from the blood outflow port at the far end of the outer tube to form a small-flow circulation auxiliary system, and blood is sucked in from the blood inflow port at the far end of the inner tube and flows out from the opening at the far end of the single-channel single-cavity cannula to form a large-flow circulation auxiliary system. By means of the mode that the outer tube and the single-channel single-cavity cannula are switched, one set of ventricle auxiliary device can meet small-flow circulation assistance and large-flow circulation assistance, and the ventricle auxiliary device is suitable for different scenes. In small-flow circulation assistance, the outer tube and the inner tube are single-channel double-cavity intubation tubes, the single-channel double-cavity intubation tubes can be intervened to the designated position only through one incision, trauma is small, and postoperative recovery is fast.

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.

The invention discloses a magnetic-coupling-driven auxiliary pressurization system for a paddle in a ventricle, relates to the technical field of medical instruments, and can solve a series of problems caused by integrated design of a motor and a paddle of an existing auxiliary pressurization device for the ventricle. The embodiment of the invention discloses a magnetic coupling driven heart chamber inner paddle auxiliary pressurization system which comprises a paddle part used for being sewn and fixed to the inner wall of a heart chamber and a driving part used for being sewn and fixed to the outer wall of the heart, and the paddle part comprises an inner sleeve, a paddle structure and a driven magnetic disc coaxially and fixedly connected with the paddle structure. The paddle structure is rotationally connected into the inner sleeve; the driving part comprises an outer sleeve, a driving motor and a driving magnetic disc coaxially and fixedly connected with an output shaft of the driving motor, and the driving motor is fixed in the outer sleeve; when the paddle part and the driving part are in a sewed and fixed state, the driven magnetic disk and the driving magnetic disk are coaxial and are magnetically coupled, and the paddle structure is driven by the driving motor to rotate through the driving magnetic disk and the driven magnetic disk which are magnetically coupled.

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 stepped ventricle auxiliary circulating pump device, relates to the technical field of heart blood pumps, and provides a structure that a heart blood pump is arranged in a heart chamber and below an aortic valve or a pulmonary valve, and a stepped motor and an axial flow channel are designed on the basis, so that a blood flow channel is formed between the motor and the axial flow channel; the blocking influence of the size of the motor above the aortic valve or the pulmonary valve on the blood circulation process can be effectively avoided, and the amount of blood pumped out of the aortic valve or the pulmonary valve is effectively increased.

The utility model relates to a blood pumping catheter and a ventricular assist system.The blood pumping catheter comprises a perfusion cavity, a perfusion pipeline, an elastic element and a first flow adjusting component, the far end of the perfusion pipeline is connected to the perfusion cavity, the elastic element and the first flow adjusting component are both installed on the perfusion pipeline, and the first flow adjusting component is located between the elastic element and the perfusion cavity; the first preset value is larger than or equal to zero, and the first flow adjusting component is in a cut-off state under the condition that the difference value between the near-end-side pressure of the first flow adjusting component and the far-end-side pressure of the first flow adjusting component is smaller than the first preset value. According to the embodiment of the invention, the blood loss of a patient can be reduced, and the risk of thrombus formation and blockage in the perfusion device and the blood pumping catheter is reduced, so that the operation stability and the operation life of the perfusion pipeline on the near end side of the perfusion device and the blood pumping catheter can be relatively improved.

The invention provides a motor control device and method and a ventricular assist device, and relates to the field of medical instrument control. The motor control device comprises a motor working state monitoring module and an abnormity correction module, and the motor working state monitoring module is used for monitoring whether a motor is in an abnormal working state based on a motor working index; the abnormity correction module is used for generating a current impact instruction when the motor is in an abnormal working state; wherein the current impact instruction is used for adjusting the current current of the motor into impact current, and the impact current is greater than the current current. By using the motor control device provided by the embodiment of the invention, the correction of the abnormal working state of the motor can be realized under the conditions that the loss of the motor is relatively small and the influence on a human body is relatively small; the motor control device provided by the embodiment of the invention is used for controlling the motor of the ventricular assist device, so that the loss of the motor can be reduced, and the influence on human blood cells can also be reduced.

An implantable LVAD is provided that includes a pump shaped so as to define a pump chamber. The pump includes a tubular linear motor, which includes a magnetic piston, which includes a reciprocating one-way valve configured to allow downstream blood flow and inhibit upstream blood flow; and a stator, which is configured to magnetically drive the magnetic piston with reciprocating motion, so as to pump blood downstream during downstream motion of the magnetic piston while the reciprocating one-way valve is closed. The pump further includes a spring, which is arranged to store energy during upstream motion of the magnetic piston and release the stored energy during the downstream motion of the magnetic piston. Control circuitry is configured to activate the tubular linear motor to provide pulsatile flow synchronized with cardiac cycles. Other configurations are also described.

The invention relates to a catheter pump position judgment device and method, a catheter pump, a ventricular assist system, a storage medium and equipment.The catheter pump position judgment device comprises a sampling module, a processing module and a judgment module, and the sampling module is configured to collect operation data of a driving motor of the catheter pump in the conveying process; the operation data at least comprises rotating speed data; the processing module is configured to determine a range value of the rotating speed data; the judgment module is configured to determine the position state of the catheter pump according to the comparison result of the range value and a preset threshold value. The method does not need to depend on an additional pressure sensor or multiple times of radiography, and can judge whether the catheter pump is located in the aorta, the transvalvular position or the left ventricle by collecting the rotating speed data of the driving motor and analyzing the range value of the rotating speed data.

An implantable LVAD system includes an implantable LVAD including an outflow cannula, which is couplable in fluid communication with a circulatory system of the patient at a first site; and an inflow cannula, which is couplable in fluid communication with the circulatory system at a second site upstream of the first site. The LVAD further includes a continuous-flow pump includes a first inlet in fluid communication with the inflow cannula, and a first outlet. The LVAD still further includes a pulsatile-flow pump includes a second inlet in fluid communication with the first outlet of the continuous-flow pump, and a second outlet in fluid communication with the outflow cannula. Control circuitry is configured to activate the continuous-flow pump to provide flow without synchronization with cardiac cycles of a heart of the patient, and activate the pulsatile-flow pump to provide pulsatile flow synchronized with the cardiac cycles. Other embodiments are also described.

The invention relates to a ventricle connecting mechanism and a ventricle auxiliary system. The ventricle connecting mechanism comprises a suture ring, a clamping ring, a pressing ring and a connecting piece. The suture ring is provided with a mounting hole for an inlet pipe of the ventricular auxiliary device to penetrate through, and a mounting groove surrounding the mounting hole is formed in the suture ring. And the clamping ring is embedded in the mounting groove. The inner diameter of the clamping ring is adjustable, and the hole diameter of the mounting hole can be adjusted by adjusting the inner diameter of the clamping ring. The pressing ring is arranged on the suture ring and abuts against the clamping ring so that the clamping ring can be limited in the installation groove. The connecting piece is fixedly connected with the suture ring and the pressing ring. According to the ventricle connecting mechanism, the clamping ring is pressed against the clamping ring through the pressing ring, and the connecting piece is arranged to fixedly connect the suture ring and the pressing ring, so that the clamping ring is clamped between the pressing ring and the bottom wall of the mounting groove, and the risk that the clamping ring falls off from the suture ring is reduced.

The invention provides a stator iron core, a magnetic suspension blood pump and a ventricular auxiliary device, the stator iron core comprises a yoke part and a plurality of tooth parts, and the plurality of tooth parts are connected to the same side of the yoke part and are arranged at intervals along the circumferential direction of the yoke part; the tooth part extends in the axial direction of the yoke part, a matching face is formed at the end, away from the yoke part, of the tooth part, the matching face inclines relative to the axis of the yoke part, and the matching face is a part of a conical face coaxial with the yoke part. When the stator core is applied to the magnetic suspension blood pump, the position of the rotor can be actively adjusted in the axial direction, and the position of the rotor can also be actively adjusted in the radial direction.

The invention belongs to the technical field of medical instruments, and particularly relates to a ventricular assist device rotating speed regulation and control method and system based on deep learning. The ventricular assist device rotating speed regulation and control method based on deep learning comprises the steps of collecting current pressure information and current pump speed information of a left ventricle, sending the current pressure information and the current pump speed information into a trained long-short-term memory network model, obtaining to-be-regulated and controlled pump speed information through the long-short-term memory network model, and obtaining to-be-regulated and controlled pump speed information through the long-short-term memory network model; and sending the to-be-regulated pump speed information to the ventricle auxiliary device. According to the invention, the monitoring module of the human body LVAD can automatically adjust the control target of the rotating speed of the pump according to the hemodynamic change, and the LVAD can realize adaptive control for individual patients.

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.