76 results about "Ventricular assist device" patented technology

The invention relates to a sensor head device for a heart support system, wherein the sensor head device has at least one sensor carrying element, wherein the sensor carrying element has at least one sensor cavity for accommodating at least one sensor and / or at least one signal transmitter cavity for accommodating at least one signal transmitter.

Apparatus and methods are described including an impeller (50) that includes a proximal bushing (64) and a distal bushing (58). Two or more helical elongate elements (52) extend from the proximal bushing (64) to the distal bushing (58), and an axial structure (54) is disposed inside of the two or more helical elongate elements (52), and along an axis around which the helical elongate elements (52) wind. The impeller (50) includes an impeller-overexpansion-prevention element (72). The impeller-overexpansion-prevention element is a single integrated structure that includes a ring (73) disposed around the axial structure (54), and a plurality of elongate elements (67) each of the elongate elements (67) extending from the ring to a respective helical elongate element (52) and being coupled to the respective helical elongate element (52) so as to prevent radial expansion of the impeller (50). Other applications are also described.

Some embodiments of percutaneous ventricular assist devices have an expandable pump impeller and an associated flexible drive shaft. The drive shaft can be coupled to a motor located external to the patient. The motor can rotate the drive shaft to spin the pump impeller inside of the pump housing, causing blood to be pumped within the patient. In some embodiments, the pump impeller is inflatable and / or self-expandable. The percutaneous ventricular assist devices with inflatable or self-expandable pump impellers are designed to have very small delivery profiles. Accordingly, various deployment modalities, including radial artery deployment, are practicable using the two-part percutaneous ventricular assist devices described herein.

The invention discloses a method and device for training a percutaneous ventricular assist device control model, and the method comprises the steps: obtaining a multi-mode real-time physiological signal of the cardiovascular state of a monitored user through simulation of a simulation platform; real-time physiological signals are used as input data to be input into the deep reinforcement learning model for training, and a control model of the percutaneous ventricular assist device capable of achieving pump speed real-time decision control is obtained; the control model is trained according to the real-time input data, so that the adaptivity of the control model is improved; performing reinforcement learning training of the control model through a reward function comprising the first reward sub-function item and the second reward sub-function item; after the percutaneous ventricular assist device is loaded with the obtained control model, the percutaneous ventricular assist device has the capability of recovering dynamic characteristics and pulsation characteristics of cardiac output and aortic pressure of a user, so that the cardiac output and the aortic pressure of a heart failure user are close to a normal physiological state, and the control model provides a basis for improving the operation quality of the percutaneous ventricular assist device; and technical guarantee is provided for cardiovascular health of the user.

The embodiment of the invention provides a monitoring system and device of a ventricular assist device, and relates to the technical field of medical instruments.The system comprises the ventricular assist device and a monitoring device.The monitoring device executes the following monitoring method that a rotating speed signal of the current rotating speed of the ventricular assist device is obtained, and determine a first pressure signal of the left ventricular pressure of the patient's heart; based on the rotating speed signal and the first pressure signal, a target correlation value representing the correlation degree between the current rotating speed and the left ventricular pressure is calculated; and determining a target support state of the ventricular assist device based on a deviation between the target correlation value and a preset reference value. By applying the scheme provided by the embodiment, the support state of the ventricular assist device can be continuously and accurately monitored in real time.

A system and method for a percutaneous ventricular assist device is provided, wherein the percutaneous ventricular assist device includes a pump assembly and a cannula assembly. The pump assembly includes one or more connectors at or near the distal end. The cannula assembly includes a cannula and an inflow cage, and a mating connector engageable with the connector of the pump assembly such that the first cannula assembly is attachable to the pump assembly. In various embodiments, the cannula assembly may be fixedly attached to the pump assembly or removably attached to the pump assembly.

1. The name of the product of this design: Extracorporeal ventricular assist device. 2. Purpose of this product design: used for extracorporeal mechanical circulatory support of the left ventricle. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

1. Name of the product in this design: Percutaneous ventricular assist device. 2. Purpose of this design: for use in medical and health care, for emergency support in cases of acute myocardial infarction, cardiogenic shock, high-risk PCI, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The embodiment of the present application provides a thrombus detection system and apparatus for a ventricular assist device, which relates to the technical field of medical devices. The system includes a thrombus detection device and a ventricular assist device. The ventricular assist device is implanted in the patient's heart through percutaneous intervention to assist the patient's heart in pumping blood. The thrombus detection device is used to detect whether there is a thrombus attached to the ventricular assist device. When the thrombus detection device detects thrombus attachment, it performs the following thrombus detection method: obtaining a back electromotive force fluctuation timing signal representing the motor back electromotive force fluctuation information during the operation of the ventricular assist device, and determining a target detection parameter; based on the back electromotive force fluctuation timing signal, using the target detection parameter, determining a target detection result representing whether there is a thrombus attached to the ventricular assist device. Applying the solution provided by this embodiment can achieve real-time detection of thrombus attachment.

The invention relates to an intrusive foldable left ventricle auxiliary device, the near end of a driving shaft is connected with a motor, the far end of the driving shaft is connected with a pump head assembly, and the pump head assembly comprises a foldable impeller driven by the driving shaft and an expandable support covering the periphery of the foldable impeller; the expandable stent is covered with a blood flow flexible film, a blood inlet is formed in the far end of the blood flow flexible film, and at least one blood outlet is formed in the near end area of the blood flow flexible film; the blood flow flexible membrane comprises a first channel, an expansion section and a second channel. When blood passes through the expansion section, the blood flow speed is reduced, the flow distribution is uniform, and the shearing force borne by the blood is directly reduced, so that the hemolysis risk is remarkably reduced from the source; meanwhile, blood flow is more stable, turbulent flow and flow stagnation areas are reduced, and the thrombosis risk is reduced; the near-end edge of the expansion section is located on the far side of the near-end edge of the expandable stent, after blood is decelerated, damage caused by impacting the inner wall of the stent is reduced, and hemolysis is further reduced.

The invention discloses a control circuit, device and control method of a ventricular assist device, a microcontroller can control a blood pump to stop and protect the blood pump from being damaged due to overcurrent when a voltage signal is greater than a first voltage threshold, and can also control the blood pump to stop and protect the blood pump from being damaged due to overcurrent when the voltage signal is less than a second voltage threshold. The human body is protected from being influenced by blood pump underflow, and the human body safety is protected; the isolation power supply module can stop outputting the current to the driving circuit when the output current of the isolation power supply module is larger than the preset current, so that the blood pump is protected from being damaged due to overcurrent. Therefore, in the use process of the blood pump, overcurrent and undercurrent protection can be carried out on the blood pump, and the safety of the blood pump and the safety of a human body are protected.

The embodiment of the invention discloses a control method, device and equipment of ventricular assist equipment, a medium and a product. The ventricular auxiliary equipment comprises a control console and a working part connected with the control console, the control console comprises a man-machine interaction part, and the man-machine interaction part is at least used for receiving control operation and / or feedback information in an interactive state. If it is detected that the man-machine interaction component is in the non-interaction state, recovery processing is executed to recover the interaction state of the man-machine interaction component; wherein during the period of executing the recovery processing, the console continues to drive the working part to operate; and receiving control operation and / or feedback information based on the man-machine interaction component when the man-machine interaction component recovers to the interactive state. According to the technical scheme, it can be ensured that the working part can work normally and continuously, normal use of the ventricular auxiliary equipment by a user is not affected, and the safety of the ventricular auxiliary equipment is ensured.

Apparatus and methods are described including a left-ventricular assist device. A pump pumps blood from the subject's left ventricle to the subject's aorta, via a tube. A distal-tip element is disposed distally to the pump and defines a straight proximal portion that defines a longitudinal axis, and a curved distal portion that is shaped such as to curve in a first direction with respect to the longitudinal axis of the straight proximal portion before passing through an inflection point and curving in a second direction with respect to the longitudinal axis of the straight proximal portion, such that the curved distal portion defines a bulge on one side of the longitudinal axis of the straight proximal portion. Other applications are also described.

Some embodiments of percutaneous ventricular assist devices have a two-part design that includes a housing component and a separately deployable rotatable inner catheter component. The housing component can include an expandable pump housing. The inner catheter can include an expandable pump impeller and an associated flexible drive shaft. The drive shaft can be coupled to a motor located external to the patient. The motor can rotate the drive shaft to spin the pump impeller inside of the pump housing, causing blood to be pumped within the patient. In some embodiments, the pump impeller is inflatable or self-expandable. The two-part percutaneous ventricular assist devices with inflatable or self-expandable pump impellers are designed to have very small delivery profiles. Accordingly, various deployment modalities, including radial artery deployment, are practicable using the two-part percutaneous ventricular assist devices described herein.

The embodiment of the invention provides an intelligent detection system and device based on ventricular assist equipment, and relates to the technical field of medical instruments.The system comprises the ventricular assist equipment and detection equipment, and the ventricular assist equipment is implanted into the heart of a patient in a percutaneous intervention mode and assists the heart of the patient in blood pumping; the detection device is used for detecting physiological nerve parameters of a patient during operation of the ventricular assist device, and the detection device executes the following intelligent detection method: acquiring a physical measurement signal at the current moment; mapping the physical measurement signal into a target discharge frequency of the baroreceptor according to a preset nonlinear mapping relation; and based on the target discharge frequency, adopting a physiological correlation model to predict the target neural activity of the patient. By applying the scheme provided by the embodiment, the autonomic nerve regulation state of the patient can be accurately and continuously evaluated.

The invention generally relates to heart pump systems. In some embodiments, a pressure sensor is provided with a heart pump, either at the inflow or the outflow of the blood pump. The heart pump may further include a flow estimator based on a rotor drive current signal delivered to the rotor. Based on the rotor drive current signal, a differential pressure across the pump may be calculated. The differential pressure in combination with the pressure measurements from the pressure sensor may be used to calculate pressure on the opposite side of the pump from the pressure sensor. In some embodiments, the pressure sensor is located at the outflow of the pump and the pump is coupled with the left ventricle. The differential pressure and pressure measurement may be used to calculate a left ventricular pressure waveform of the patient. With such a measurement, other physiological parameters may be derived.

An assembly, devices, and kit for end-to-side connection to anatomical tissue is disclosed. The system and method are particularly useful in coupling a ventricular assist device pump to an aorta. The assembly and method include using a tubular graft member coupled to a connection ring having at least one of a plurality of distally projecting tines extending from a distal aspect of the connection ring, and a stent having a distal flange section configured to abut an abluminal wall surface of the aorta, and an assembly including the tubular graft member and connection ring, for delivering the end-to-side connection.

The invention provides a ventricular assist device and a blood pump thereof. The blood pump comprises a pump shell and an impeller, the impeller comprises a rotor part and a plurality of blades arranged on the rotor part, the blood pump further comprises a flow guide cone arranged basically opposite to the blood inlet, the front edge of at least one blade extends towards the radial inner side to the position above the flow guide cone, and the front edge of at least one blade extends towards the radial inner side to the position above the flow guide cone. The lower side of the front edge of at least one blade is provided with an avoiding part, the radius of the flow guide cone is defined as RC, the height of the flow guide cone is defined as HC, and a cylinder with the central axis of the blood inlet as the axis, the top face passing through the cone top of the flow guide cone, the radius of the cylinder is RC, and the height of the cylinder is HC is obtained. And the avoiding part is constructed to enable the at least one blade to avoid the space occupied by the cylinder. According to the blood pump, blood cavitation can be reduced or avoided while high hydraulic performance is maintained, blood damage is reduced, and blood compatibility is improved.

An implantable pump includes a rigid housing with an oblate spheroid shape and having an inner chamber divided by a movable elastomeric membrane into a gas sub-chamber which is connectible through a drive line to an external pneumatic source, and a blood sub-chamber which is connectible through a graft assembly to an anatomical heart. The housing includes a blood port opening oriented at an angle and at the upper apex of the housing and connected to the blood sub-chamber, and a gas port opening to the gas sub-chamber that is situated at a lower apex of the housing. The pump is provided with a drive line that includes a gas conduit and a heart sensor, the drive line connectible to a drive system that is capable of delivering gas flow through the drive line gas conduit in response to signals driven by the heart sensor.

A ventricular assist device includes a housing, a rotor, a stator assembly, control electronics, and a percutaneous cable. The housing includes a dividing wall that delineates an inner volume. The rotor includes one or more permanent magnets and centrifugal impeller blades. The rotor and the inner volume are sized for complete magnetic levitation of the rotor within the inner volume so that blood flows through a secondary blood flow path between the rotor and the dividing wall. The stator assembly includes drive coils and levitation coils arranged radially relative to the rotor. The drive coils are operable to drive rotation of the rotor. The levitation coils are operable to electromagnetically levitate the rotor to control a radial position of the rotor within the inner volume. The control electronics are disposed within the housing and configured to control electrical supply to the drive coils and the levitation coils.

Apparatus for use with a guidewire (10) and a ventricular assist device (20) having a distal-tip element (107) that comprises a distal-tip portion (120), the apparatus comprising: a tip straightening element (270) configured to straighten distal-tip element (120) of ventricular assist device (20) during insertion of guidewire (10) into the distal tip element (120) via the distal-tip portion (107), wherein the tip straightening element (270) comprises a housing that defines a straight lumen (271), and wherein the tip straightening element (270) is removable from the distal-tip element, while the guidewire (10) is disposed in the distal tip element (107).

Apparatus and methods are provided for use with a left-ventricular assist device (20) including a pump-outlet tube (24) configured for insertion, through an aorta of a subject, into a left ventricle of a heart of the subject such that a proximal section of the pump-outlet tube is disposed within the aorta and a distal section of the pump-outlet tube is disposed within the left ventricle. A pressure sensor (206) outputs a signal indicative of an aortic pressure within the aorta over an interval. A processor (25) compares an indication of the minimum of the aortic pressure to an indication of the peak-to-peak amplitude of the estimated pressure gradient between the aorta and the left ventricle over an interval, and, in response thereto, outputs an indication that the pump-outlet tube (24) is positionally biased toward the aorta. Other applications are also described.

According to the efficient and reliable power transmission system and the interventional foldable left ventricle auxiliary device thereof, the near end of a flexible transmission shaft is connected with a motor rotating shaft, the far end of the flexible transmission shaft is connected with a hard shaft, the near end of the hard shaft is in supporting fit with a near-end bearing assembly, and the far end of the hard shaft is in axial sliding and circumferential rotating fit with a far-end bearing assembly; the supporting pipe is arranged between the outer pipe and the flexible transmission shaft, and through the combination of the flexible transmission shaft and the hard shaft, the flexibility of the system in the conveying process and the rotating stability and high efficiency of the impeller end are guaranteed. According to the double-flow-path flushing design, on one hand, forward flushing is conducted on a key friction pair, and lubricating, cooling and sealing are achieved; and on the other hand, an independent backflow channel is formed, abrasion particles are actively discharged out of the system, which is the core for maintaining long-term reliable operation of the system, and meanwhile, the flushing fluid can cool the motor, so that multiple purposes are achieved.

The present disclosure relates an apical connector and a method for implanting and removing a ventricular assist device. The apical connector includes a first connection assembly and a second connection assembly. The first connection assembly includes a first base, a first positioning portion, and an annular cuff. The second connection assembly includes a second base and a first stopping portion. When the second base is mounted to the first through hole, the first stopping portion is located at a second position, and the first positioning portion is blocked on an end surface of the first stopping portion facing a first direction.

The embodiment of the invention provides an intelligent control system and device based on ventricular assist equipment, and relates to the technical field of medical instruments.The system comprises the ventricular assist equipment and control equipment, and the control equipment is used for controlling the ventricular assist equipment. The control equipment executes the following control method: acquiring a physical measurement signal of the ventricular auxiliary equipment at the current moment; predicting a pressure signal and a neural signal of the patient at the next moment by adopting a signal prediction model in a first closed loop of a double-closed-loop control architecture based on the physical measurement signal; and based on the pressure signal and the neural signal, adopting a rotating speed prediction model in the first closed loop to predict a target rotating speed at the next moment, and adopting a second closed loop in the double-closed-loop control architecture to control the ventricular assist device according to the target rotating speed. By applying the scheme provided by the embodiment of the invention, the self-adaptive control of the ventricular assist device can be realized.

An implantable pump includes a rigid housing with an oblate spheroid shape and having an inner chamber divided by a movable elastomeric membrane into a gas sub-chamber which is connectible through a drive line to an external pneumatic source, and a blood sub-chamber which is connectible through a graft assembly to an anatomical heart. The housing includes a blood port opening oriented at an angle and at the upper apex of the housing and connected to the blood sub-chamber, and a gas port opening to the gas sub-chamber that is situated at a lower apex of the housing. The pump is provided with a drive line that includes a gas conduit and a heart sensor, the drive line connectible to a drive system that is capable of delivering gas flow through the drive line gas conduit in response to signals driven by the heart sensor.

An apparatus comprising a left-ventricular assist device (20). The left-ventricular assist device (20) comprises: an impeller (50) configured to be placed inside a left ventricle of a subject and to pump blood from the left ventricle to an aorta of the subject, by rotating; a frame (34) disposed around the impeller; and a pump-outlet tube (24) configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion (46) of the pump-outlet tube is disposed within the subject's left ventricle. The distal portion of the pump-outlet tube (24) extends to a distal end of the frame (34) and defines more than 10 blood-inlet openings (108) that are sized such as (a) to allow blood to flow from the subject's left ventricle into the tube (24) and (b) to block structures from the subject's left ventricle from entering into the frame (34). A porosity of the distal portion (46) of the pump-outlet tube (24), which defines the blood-inlet openings (108), is more than 40 percent.

The application discloses a double-balloon left ventricular assist device, which comprises an inlet pipe, an external balloon, an elastic support, an internal balloon, a catheter and a connecting piece; the inlet pipe is provided with a plurality of inflow windows and a one-way valve for controlling one-way blood flow; the external balloon has a folding and expanding state; during transportation, the external balloon is in the folding state and can be accommodated into a delivery sleeve; when reaching a designated position, the external balloon is in the expanding state; the elastic support is attached to the surface of the external balloon, and elastic deformation of the elastic support enables the external balloon to switch between the folding and expanding states; in the expanding state, the elastic support can provide radial support force, so that the external balloon expands and keeps a fixed volume; the internal balloon is arranged inside the external balloon and is contracted and expanded by injecting gas or liquid, so that the volume of the internal balloon and the internal cavity of the external balloon periodically changes and is used for blood suction and discharge; the catheter is provided with a medium cavity and a guide wire cavity, and the medium cavity is communicated with the internal balloon.

This invention provides a method and apparatus for recommending ventricular assist devices, relating to the field of medical device technology. The method includes: obtaining first data characterizing the real-time cardiac state of a target subject and second data characterizing the historical cardiac state; predicting the target ventricular assist device used by the target subject based on the first and second data; and recommending the target ventricular assist device to the target subject. Applying the solution provided in this embodiment to recommend ventricular assist devices can improve recommendation efficiency.

The invention relates to a sensor head device for a heart support system, wherein the sensor head device has at least one sensor carrying element, wherein the sensor carrying element has at least one sensor cavity for accommodating at least one sensor and / or at least one signal transmitter cavity for accommodating at least one signal transmitter.