43 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.

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 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.

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 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 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.

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.

The embodiment of the application provides a kind of ventricular assist device monitoring system and device, it is related to medical instrument technical field, above-mentioned system includes ventricular assist device and monitoring device, the monitoring device executes following monitoring method: the current rotating speed of ventricular assist device is obtained rotating speed signal, and the first pressure signal of the left ventricular pressure of patient heart is determined;Based on the rotating speed signal and first pressure signal, the target correlation value of the degree of correlation between current rotating speed and left ventricular pressure is calculated;Based on the deviation between the target correlation value and preset reference value, the target support state of the ventricular assist device is determined.The scheme provided in the embodiment can realize the real-time continuous accurate monitoring of the support state of ventricular assist device.

This application provides an intelligent control system and device based on a ventricular assist device, relating to the field of medical device technology. The system includes a ventricular assist device and a control device. The control device controls the ventricular assist device and executes the following control method: acquiring the physical measurement signal of the ventricular assist device at the current moment; based on the physical measurement signal, using a signal prediction model in the first closed loop of a dual-closed-loop control architecture to predict the patient's pressure signal and nerve signal at the next moment; based on the pressure signal and nerve signal, using a speed prediction model in the first closed loop to predict the target speed at the next moment, and using the second closed loop of the dual-closed-loop control architecture to control the ventricular assist device according to the target speed. Applying the solution provided in this embodiment enables adaptive control of the ventricular assist device.

The invention relates to the technical field of medical instruments, and discloses a double-optical-fiber pressure sensor assembly and a percutaneous ventricular auxiliary device, and the double-optical-fiber pressure sensor assembly comprises a housing, a first optical fiber pressure sensor and a second optical fiber pressure sensor. The shell is provided with a first inner cavity and a second inner cavity, a first window and a second window are formed in the two opposite sides of the outer wall of the shell respectively, the first window is communicated with the first inner cavity, and the second window is communicated with the second inner cavity. The end portion of the first optical fiber pressure sensor extends into the first inner cavity, and the first pressure sensing element is attached to the first window. The end portion of the second optical fiber pressure sensor extends into the second inner cavity, and the second pressure sensing element is attached to the second window. The two optical fiber pressure sensors are packaged and protected through the arrangement of the shell, integrated installation of the two optical fiber pressure sensors and the catheter is facilitated, the optical fiber pressure sensors can work in blood for a long time, mutual interference of the two pressure sensing elements is avoided, and the accuracy and stability of pressure detection are improved.

The utility model discloses a ventricular assist device control system. Belongs to the technical field of medical instruments and comprises a central control system comprising a processor and at least one first communication interface connected with the processor; one first communication interface is connected with the corresponding ventricular auxiliary device; each ventricular auxiliary device is used for providing pump blood power for a corresponding target object; the processor is used for acquiring a first parameter of a corresponding target object and / or a second parameter of the ventricular assist device through the ventricular assist device, the first parameter comprises basic information of the target object and physiological parameter information of the target object, and the second parameter comprises a current operation parameter. According to the embodiment of the invention, the operation parameters of the ventricular auxiliary equipment can be monitored in real time, and at least one ventricular auxiliary equipment can be remotely controlled, so that the labor cost is reduced, and the auxiliary efficiency of the ventricular auxiliary equipment on a patient is improved.

This application discloses a method, apparatus, device, storage medium, and program product for determining blood flow rate. Applied to ventricular assist devices, the ventricular assist device includes a blood pump motor and a blood pumping catheter connected to the blood pump motor. The method includes: acquiring first operating information of the blood pump motor, a first usage duration of the blood pumping catheter, and first hemodynamic parameter information of a target object; wherein the target object includes the object on which the blood pump motor acts; inputting the first operating information, the first usage duration, and the first hemodynamic parameter information into a blood flow rate determination model to obtain the blood flow rate output by the blood flow rate determination model. According to the embodiments of this application, the blood flow rate is comprehensively determined by considering factors such as the usage duration of the blood pumping catheter and the hemodynamic parameters of the target object, thereby improving the accuracy and robustness of the blood flow rate determination.

A method for providing therapeutic treatment to reduce pre-load may be provided. The method may include placing a ventricular assist device (VAD) at least partially within a left ventricle or a right ventricle of a patient, and placing a catheter-based device including an adjustable flow limiting element (FRE) such that the FRE is disposed within a superior vena cava (SVC) of the patient. The method may include receiving information from the VAD and / or conduit-based FRE device, determining a first determination value based on the information, and controlling at least one performance parameter of the VAD and / or conduit-based device based on the first determination value.

The utility model provides a motor, a coil and a ventricle auxiliary device, the motor comprises a casing and the coil, the casing forms an accommodating cavity and a via hole communicated with the accommodating cavity, the coil comprises a coil main body and a plurality of connecting taps electrically connected with the coil main body, the coil main body is located in the accommodating cavity, and the connecting taps are electrically connected with the coil main body. At least part of the connecting taps are gathered together in the containing cavity to form a tap cluster, at least part of the connecting taps extend to the outside of the machine shell through the same via hole and are used for being electrically connected with a driving cable, on one hand, the overall structural strength of all the connecting taps in the tap cluster can be improved, and the risk that the part of the connecting taps are broken in the assembling process is reduced; and meanwhile, the overall tensile strength of each connecting tap in the tap cluster after being connected with the driving cable is improved, the connection reliability of the connecting taps and the driving cable is improved, and on the other hand, the number of via holes formed in the machine shell is reduced, the machining difficulty of the machine shell is reduced, and the production efficiency of the motor is improved.

The embodiment of the application provides a kind of control method and device of ventricular assist device, it is related to medical instrument technical field, above-mentioned method includes: determine the mathematical model that target ventricular assist device is coupled with sample heart environment, as simulation coupling model;Determine the target model based on the simulation coupling model, which represents the mapping path between the heart pressure change value and the control parameter of the target ventricular assist device;Obtain the actual heart pressure change value of the current target heart environment, determine the target control parameter of the target ventricular assist device based on the target model and actual heart pressure change value;According to the target control parameter, the target ventricular assist device is controlled, so that target ventricular assist device maintains the constant heart pressure change of target heart environment.Application of the scheme provided in this embodiment can realize the accurate control of ventricular assist device.

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.

The embodiment of the invention provides an equipment life test system and device of ventricular assist equipment, and relates to the technical field of medical instruments, the system comprises physiological simulation equipment and equipment life test equipment, the physiological simulation equipment is used for simulating a physiological environment, the ventricular assist equipment is arranged in the physiological simulation equipment, and the equipment life test equipment is used for testing the service life of the ventricular assist equipment. The equipment life test equipment is used for testing the equipment life of the ventricular auxiliary equipment, and the equipment life test equipment executes the following equipment life test method: acquiring equipment operation parameters of the ventricular auxiliary equipment; calculating the energy consumption efficiency and the blood pumping efficiency of the ventricular assist device based on the device operation parameters, and detecting a device vibration value representing the vibration information of the ventricular assist device; and based on the energy consumption efficiency, the blood pumping efficiency and the equipment vibration value, evaluating the equipment life of the ventricular assist equipment. By applying the scheme provided by the embodiment, the device life of the ventricular assist device can be continuously and accurately evaluated in real time.

A sliding bearing and a ventricular assist device, the sliding bearing being configured to be adapted to mount an expandable stent of the ventricular assist device and comprising a bearing body comprising a bearing proximal section, a bearing distal section, and a bearing channel provided in the bearing body; the bearing channel is configured to be suitable for mounting a rotor of the ventricular auxiliary equipment, so that the rotor and the bearing near section form axial sliding and circumferential running fit; the bearing distal section is configured to be adapted to mount a pigtail tube of a ventricular assist device. According to the sliding bearing, integrated installation of the expandable stent, the rotor and the pigtail tube of the ventricular auxiliary equipment is achieved, and the strength and reliability of a connecting structure of the expandable stent, the rotor and the pigtail tube are ensured without affecting axial sliding and circumferential rotation of the rotor on the sliding bearing; and meanwhile, the structural size can be reduced as much as possible due to matching and integrated installation, so that the injury degree of the ventricular auxiliary equipment to a human body in an operation is reduced, and the success probability of the operation is improved.

Some pump impellers used in mechanical circulatory support systems such as percutaneous ventricular assist devices can be expandable. Some such impellers can be inflatable, for example. Some inflatable impellers can have an inflatable main body and a plurality of inflatable fins extending along the main body in a linear or a spiral arrangement. In some cases, such fins can be non-inflatable. Such fins can also be coupled to each other in an arrangement of two or more fin members in a stacked configuration.

Apparatus and methods are described for use with a left-ventricular assist device (20). A processor (25) is configured to compute respective estimated left ventricular end diastolic pressures for one or more cycles of the heart, by, for each of the cycles: identifying a time t0 at which a speed of a motor (31) was a maximum, and identifying the estimated left ventricular end diastolic pressure for the cycle based on a value of a left ventricular pressure of the subject during an interval [t0-c*D t0], c being a predefined constant and D being a duration of the cycle. The processor (25) displays the estimated left ventricular end diastolic pressures or a statistic thereof, on a display (228). Other applications are also described.