142 results about "Artificial heart" patented technology

The invention discloses an interventional artificial heart liquid path shunting structure, and relates to the technical field of medical instruments, the interventional artificial heart liquid path shunting structure comprises an impeller rotating shaft, a transmission shaft and a multi-cavity tube, the impeller rotating shaft is internally provided with a liquid path channel, the far end of the impeller rotating shaft is rotatably connected with a pigtail tube through a rotating structure, and the multi-cavity tube comprises a perfusion cavity and an outflow cavity; the near end of the impeller rotating shaft is connected with the far end of the transmission shaft, an inlet communicated with the liquid path channel is formed in the impeller rotating shaft, the inlet is communicated with the perfusion cavity, the liquid path channel and the outflow cavity, and perfusion liquid flows in from the perfusion cavity and flows out from the transmission shaft. The perfusate flows into the liquid path channel from the near end of the impeller rotating shaft through the inlet, flows to the far end of the impeller rotating shaft along the liquid path channel, flows out of the gap between the impeller rotating shaft and the rotating structure and then enters the human body, and meanwhile the perfusate flows out of the outflow cavity. Interface lubrication can be improved, friction is reduced, and cooling and heat dissipation can be achieved.

The application discloses a heart valve device and relates to the technical field of artificial heart valves, which comprises an outer valve frame and a valve leaflet assembly connected to the inside of the outer valve frame, and the outer valve frame is a ring-shaped grid frame; the outer valve frame comprises an inflow side grid frame and an outflow side grid frame arranged in sequence from an inflow end to an outflow end, and the inflow side grid frame and the outflow side grid frame form an annular recess for clamping a native valve ring on the outer periphery of the outer valve frame; the outflow side grid frame comprises a plurality of groups of grid support units connected in sequence along the circumferential direction and enclosed into a ring, and the grid support unit comprises an outer convex grid support and an inner concave grid support, and the outer surface of the inner concave grid support is arranged in a concave manner relative to the outer surface of the outer convex grid support. In this way, the anterior leaflet of the original mitral valve can be attached to the inner concave grid support, the extrusion of the outer valve frame on the anterior leaflet is reduced, the anterior leaflet is prevented from being extruded to the left ventricular outflow tract by the outer valve frame, and the outflow area of the left ventricular outflow tract is prevented from being reduced to cause obstruction.

Disclosed in the present application are an artificial heart valve, an interventional system, and a position registration method for an artificial heart valve. The artificial heart valve comprises: a stent, which is of a cylindrical structure and has a spatially axial direction, the interior of the cylindrical structure being a blood flow channel, and the stent being radially deformable so as to switch between a delivery state in which the stent is radially compressed and a deployed state in which the stent is radially deployed; valve leaflets, which are connected to the stent to control the blood flow channel; and a first radiopaque marker, which is connected to the stent. At the reference angle of viewing of the stent, when the stent rotates around its own axis, the distance between the projection position of the first radiopaque marker and the axis of the stent changes correspondingly.

The utility model discloses a machining die for an artificial heart valve support, which belongs to the technical field of production and machining of medical instruments, and comprises a support main body and a die-casting main body, the die-casting main body comprises at least two hold-down units, each hold-down unit comprises a first hold-down component and a second hold-down component, and the first hold-down component and the second hold-down component are arranged in the axial direction of the support main body. The first pressing and holding assembly and the second pressing and holding assembly are detachably connected. The first pressing assembly comprises a first pressing piece and a fixed anchor pressing piece, the fixed anchor pressing piece is arranged on the outer wall of the first pressing piece, the side, close to the fixed anchor pressing piece, of the first pressing piece is provided with a first protruding structure and a positioning groove, the first protruding structure is arranged in the positioning groove, and the fixed anchor pressing piece is provided with a second protruding structure corresponding to the first protruding structure. The inner wall and the outer wall of the fixing anchor are extruded and shaped through the first protruding structure and the second protruding structure respectively, so that the main body of the artificial heart valve stent and the fixing anchor are simultaneously machined at a time through the machining die, and the machining production efficiency is improved.

The present application relates to a kind of trans-catheter heart valve replacement system, which is composed of artificial heart valve and valve anchoring device, wherein the valve anchoring device can be wrapped outside valve chordae tendineae, while capturing native valve leaflet, providing positioning point for subsequent implantation of artificial heart valve;Artificial heart valve can be implanted in heart, and replace the physiological function of native valve.The valve anchoring device and artificial heart valve can be matched and positioned, in order to prevent the two from being too tight and continuous extrusion, friction and causing chordae tendineae rupture, there are two kinds of cooperation between them: the first cooperation state, can let artificial heart valve and valve anchoring device abut each other, ensure the stability of structure and position when the two are matched with each other;Second cooperation state, there is gap between artificial heart valve and valve anchoring device at this time, so that native valve leaflet or chordae tendineae can pass through, to reduce the contact area between valve replacement system and chordae tendineae as much as possible, avoid extruding chordae tendineae.

The present disclosure discloses a matching method and device of a heart valve and an electronic device. The method comprises: determining a plurality of target planes in a heart according to an anatomical structure image of the heart; determining a structural feature of the heart in each plane according to the anatomical structure image; determining a junction point in each target plane of the plurality of target planes according to the structural feature, wherein the junction point is a point at a junction edge between any two adjacent leaflets of the heart valve of the heart, and the junction edge is a connecting position between any two adjacent leaflets; determining a first push-away range corresponding to each target plane according to the junction point and the structural feature of the heart; determining a second push-away range corresponding to the heart valve according to the first push-away range corresponding to each target plane; and determining an artificial heart valve matched with the heart valve according to the second push-away range. The present disclosure solves the technical problem that the accuracy cannot be guaranteed due to the determination of the heart valve according to experience in the related art.

The utility model relates to a valve frame and an artificial heart valve. The valve frame can be switched between a radial compression structure and a radial expansion structure; each of an inflow row grid, an outflow row grid and a middle row grid of the valve frame comprises two rows of wave rods which are oppositely arranged and connected with each other, each row of wave rods comprises a plurality of supporting rods, and the opposite ends of every two adjacent supporting rods are connected at a joint part; each joint part comprises a solid part and a vacant part radially penetrating through the solid part, the opposite ends of the two adjacent supporting rods are smoothly connected with the solid part on the two sides of the vacant part, the vacant part is also in a smooth shape, and an opening of the vacant part corresponding to the wave crest of the wave rod faces the wave trough in the axial direction; the opening of the vacant part corresponding to the wave trough of the wave rod faces the wave crest in the axial direction; the joint part is used for helping each grid to uniformly deform in the structure conversion process of the valve frame; the width of the solid part is larger than or equal to the sum of two times of the width of the supporting rod and the width of the vacant part. The heart valve prosthesis comprises the valve frame, a covering film and at least two artificial valve leaflets capable of being opened and closed oppositely.

The invention belongs to the technical field of artificial heart, and discloses an artificial heart magnetic suspension blood pump motor system technology based on wireless energy supply. The system is composed of a data acquisition module, a control algorithm module and an execution module. The data acquisition module acquires information such as blood flow, blood pressure, temperature and energy through various sensors and transmits the information to the control algorithm module. The control algorithm module adopts a model prediction control algorithm and calculates optimal control parameters according to the collected information. The execution module comprises a magnetic suspension blood pump motor, and the rotating speed of the magnetic suspension blood pump motor is dynamically adjusted according to the control parameters to meet physiological needs of the patient. According to the magnetic suspension blood pump motor system based on wireless energy supply, the problems of friction, energy loss and heating are reduced, and the reliability of the system is improved. And through a wireless energy supply mode, the movement freedom degree of the patient is effectively improved, and the system stability and the service life are enhanced.

This invention belongs to the field of extracorporeal circulation monitoring technology and discloses a multi-parameter linkage monitoring system for an artificial heart-lung machine, including an artificial heart-lung machine circuit, a detection component, an execution component, and a controller. The artificial heart-lung machine circuit includes a venous drainage line, a blood reservoir, a blood pump, a membrane oxygenator, an arterial perfusion line, and a gas supply line. The detection component is used to detect venous pressure, fluid level, pressure before and after the membrane oxygenator, arterial perfusion flow rate, blood oxygen, and gas supply pressure and flow rate. The controller performs time alignment on the detection signals within the same sampling period and, combined with changes in similar detection signals in adjacent sampling periods, distinguishes between insufficient drainage, increased membrane oxygenator resistance, and abnormal gas supply, outputting corresponding deceleration, speed limiting, gas supply adjustment, gas supply switching, pump shutdown, alarm, and lockout control signals. This system is used for linkage monitoring and control of abnormal sources in the extracorporeal circulation circuit.

Systems and methods for reducing vibrations perceived by a human due to an artificial heart valve include a vest that is wearable around a torso of the human, a plurality of sensors mounted to the vest, a plurality of vibration-generating actuators mounted to the vest, and a controller. The plurality of sensors detects vibrations in the human generated by the artificial heart valve. The controller is operable to receive signals representing the detected vibrations from the plurality of sensors, and is operable to produce anti-vibration signals that substantially attenuate the detected vibrations. A first sensor of the plurality of sensors is located near a first vibration-generating actuator of the plurality of vibration-generating actuators to form a sensor / actuator set. In the sensor / actuator set, the anti-vibration signals generated by the controller for the first vibration-generating actuator correspond to the vibrations detected by the first sensor.

This invention discloses a novel valve stent and artificial heart valve, belonging to the field of medical device technology. The valve stent has a hollow, symmetrical, mesh-like tubular structure, with a first layer of hexagonal mesh groups, a second layer of polygonal mesh groups, and a third layer of polygonal mesh groups arranged sequentially from the outflow end to the inflow end. The stent has a small overall mesh count and symmetrical structure, resulting in uniform deformation during compression and expansion. It exhibits excellent radial support and minimal expansion rebound, significantly reducing the risk of paravalvular leakage. While maintaining radial support, this invention can reduce the stent strut width to 0.2–0.4 mm, and the minimum outer diameter of the valve after compression can reach 2.5–4.5 mm. Simultaneously, the overall length change during stent compression and expansion is minimal, greatly improving the smoothness of vascular delivery and the accuracy of valve implantation positioning. This meets the clinical needs of transcatheter aortic valve replacement surgery, enhancing the safety and effectiveness of artificial heart valve implantation.

A medical device that is adapted for excising a valve leaflet portion of a valve leaflet from a heart valve includes an elongate shaft including a distal region and an inflatable balloon that is secured to the distal region and that is adapted to extend through the heart valve. The inflatable balloon has an outer surface and includes a deflated configuration and an inflated configuration. An electrocautery electrode is disposed relative to the inflatable balloon such that the electrocautery electrode is positioned to excise the valve leaflet portion when RF energy is applied to the electrocautery electrode and the inflatable balloon is in the inflated configuration. In some cases, the heart valve includes an artificial heart valve. In some cases, the valve leaflet includes an artificial valve leaflet.

A delivery device for a replacement heart valve implant includes a handle having first and second rotatable knobs, and an elongate shaft assembly extending from the handle. A distal portion of the shaft assembly includes an implant holding portion configured to constrain the implant in a radially collapsed configuration. The implant includes a first feature and a second feature. The first knob includes a first tactile element representative of the first feature. The second knob includes a second tactile element representative of the second feature. The first tactile element may be embossed on the first knob. The second tactile element may be embossed on the second knob. The first and second tactile elements are configured to reduce a user's cognitive load during deployment of the implant.

The present invention relates to an implantable artificial device, such as an artificial heart valve, and to a mounting configuration and method for attaching a soft component, such as a valve leaflet or skirt, to the frame of such an artificial valve. [Solution] The valve leaflets are connected to the struts of the frame via primary sutures, which are passed in an in-and-out pattern along the cusp end portion of the valve leaflets, and the secondary sutures are passed around the struts through the primary sutures and have a plurality of self-tightening structures configured to contract on the struts under tension.

This image shows a device for checking the rotation speed of the circulating motor in an artificial heart-lung machine, in order to prevent unintentional backflow of circulation when the motor speed is reduced. As shown in the image, the set coast speed (a speed pre-set to prevent accidental backflow when changing the motor speed) and the motor speed are displayed on an arc-shaped indicator using differences in brightness. An icon indicating the set coast speed is displayed outside the indicator, and an icon indicating the current motor speed is displayed inside the indicator. The indicator displays the motor speed with different brightness levels until it reaches the reference coast speed, and when it exceeds the coast speed, allowing the user to check the rotation speed at a glance. Note that the display of the indicator and icons may be reversed; for example, the icons for the set coast speed and motor speed may be displayed around the indicator, and the current motor speed may be displayed on the arc-shaped indicator using differences in brightness.

A device for treating a diseased native valve in a patient is provided, the device comprising: a frame structure; valve segments radially arranged within the frame structure, the valve segments including a plurality of leaflets; and a plurality of commissure attachment mechanisms coupling the leaflets to the frame structure, each commissure attachment mechanism extending radially inward from the outflow end of the frame structure to form a gap between an inner diameter of the outflow end and an outflow edge of the valve segment. Other embodiments and methods of use are also provided.

1. Name of the product in this design: Cardiac stent. 2. Purpose of this design: This design is used to maintain or connect to an artificial heart valve. 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 belongs to the technical field of positioning guiders, and particularly relates to a minimally invasive intubation positioning guider special for an in-vitro artificial heart, which comprises a fixing mechanism, a rotating mechanism positioned at the top of the fixing mechanism, an angle adjusting mechanism positioned at the top of the rotating mechanism and a distance adjusting mechanism positioned above the angle adjusting mechanism, the distance adjusting mechanism comprises a supporting frame, the supporting frame is fixedly connected to the top of the angle adjusting mechanism, and supporting legs are fixedly connected to the left side and the right side of the supporting frame. The supporting frame is controlled to rotate through the rotating ring, the inserting pipe is rotated and the transverse position of the inserting pipe is adjusted according to actual needs, the supporting frame is controlled to rotate through the micro motor, the angle of the inserting pipe is adjusted, the inserting pipe is controlled to vertically move by moving the sliding sleeve block, and the depth of the inserting pipe is adjusted; the problems that in traditional intubation blind puncturing, the risk that the artery is punctured by mistake to damage adjacent heart tissue exists, and the intubation cannot be accurately guided to reach the target depth and cannot be kept at the optimal angle are solved.

The application discloses a back guide vane structure capable of preventing backflow and an artificial heart, and relates to the technical field of artificial hearts. The back guide vane structure comprises a back guide vane hub, a plurality of back guide vane blades fixedly connected to the back guide vane hub, and a deflection blade arranged at the rear end of the back guide vane blade and rotatably connected to the back guide vane hub and capable of deflecting to one side surface of the back guide vane blade. The application further discloses an artificial heart. The application has the advantages of preventing blood backflow when the artificial heart stops rotating due to a fault.

A bowl-shaped permanent magnet brushless direct-current motor, including a bowl-shaped stator core and a plurality of permanent magnets; wherein, the bowl-shaped stator core includes a stator yoke portion and a plurality of bent teeth; a height difference exists between a tooth shoe of the bent tooth and a plane on which the stator yoke portion is located, and the tooth shoe of the bent tooth is located at the same height as the permanent magnet in an axial direction, so that an armature magnetic flux path is located at the same height as a permanent magnet excitation magnetic flux path, thereby implementing an unobstructed magnetic flux path.

The present application relates to a kind of self-balancing double-cavity nutational blood pump, including pump cavity, pump cavity is separated into right ventricular pump cavity and left ventricular pump cavity of upper and lower distribution by stator isolation base, right ventricular pump cavity is equipped with right ventricular nutational disc, left ventricular pump cavity is equipped with left ventricular nutational disc;Center hole of stator isolation base is equipped with coaxial transmission main shaft through, coaxial transmission main shaft upper end is connected with right ventricular nutational disc by right ventricular eccentric drive sleeve, lower end is connected with left ventricular nutational disc by left ventricular eccentric drive sleeve, the inclination of right ventricular eccentric drive sleeve and left ventricular eccentric drive sleeve in circumferential direction is 180 degrees apart;Coaxial transmission main shaft drives right ventricular nutational disc and left ventricular nutational disc synchronous nutational swing of swing.The mechanical self-balancing of right ventricular pump cavity, left ventricular pump cavity is realized using 180° phase difference conjugate drive, the inherent violent mechanical vibration of single-disc nutational pump is eliminated from physical root, greatly guarantee the working stability of whole artificial heart implantation in human body and the comfort of patient.

The invention relates to a blood shearing device and a blood compatibility evaluation method. The blood shearing device comprises an objective table, a fixing support, a supporting beam, a stator, a rotor and a driving source. The device can simultaneously adjust the roughness and wettability of the material surface, breaks through the limitation that only a single factor can be researched in the prior art, and provides a more comprehensive platform for systematically evaluating the blood compatibility; in the experimental method, red blood cell hemolysis is detected, and the degradation condition of plasma protein is evaluated synchronously, so that the overall injury mode of blood components under the action of an artificial surface can be reflected more truly. Experimental basis can be provided for material selection and surface optimization of blood contact type medical instruments such as an artificial heart pump, an ECMO and a hemodialysis machine, the clinical complication risk can be reduced, and development of artificial organs and blood purification technologies is promoted.

An artificial heart valve comprises a frame, a plurality of flexible leaflets attached to the frame, and a plurality of support members, each support member being attached to a corresponding leaflet. The leaflets are movable relative to the frame between an open configuration, in which the leaflets permit blood flow therebetween in a direction having at least a component in a forward direction, and a closed configuration, in which the leaflets prevent or restrict blood flow therebetween in a direction having at least a component in a backward direction which is opposite to the forward direction. The support members are movable with the leaflets relative to the frame. When the leaflets are in the closed configuration and exposed to a back pressure having at least a component in the backward direction, a force is exerted on the leaflets in the backward direction, and the support members at least partially prevent or resist deformation of the leaflets. A leaflet arrangement for an artificial heart valve and a method of manufacturing an artificial heart valve are also disclosed.

The invention discloses an artificial heart valve, and relates to the technical field of medical instruments, the artificial heart valve comprises a support and three valve leaflets, the valve ring of the support is provided with a suture edge along the radial direction of the valve; each valve leaflet is provided with a fixed edge, a free edge and an underbelly; the lower abdomen is of a solid film structure and is realized by freely lofting and modeling from a fixed edge to a free edge; the fixed edge is fixed to the support, and the free edges of the three valve leaflets define a valve opening. The ratio of the axial height of the valve leaflets to the radius of the valve ring is 1-1.4; the angle between the tangent line of the top end of the fixed edge and the central axis of the valve is 15-25 degrees, simulation analysis shows that the stress of the whole valve leaflet can be reduced by adopting the size proportional relation, and the service life of the valve leaflet can be prolonged.

A magnetic driver generates a magnetic field that rotates about an axis and induces nutation in a disc with an array of magnets (wobble plate). The magnetic driver can be a drive disc with an array of magnets and rotated by a drive motor, or can be electromagnetic coils sequentially energized, to provide the rotating magnetic field. The wobble plate nutates about the axis of the rotating magnetic field but is constrained from rotating about the axis. The wobble plate can be enclosed in a pump housing where nutation of the wobble plate causes pumping of a fluid to occur, such as in an implanted Left Ventricular Assist Device (LVAD) or a Total Artificial Heart (TAH). Driven in reverse, an input pumping fluid may induce nutation of the wobble plate which in turn induces rotary motion of a drive disc that drives a generator or a motor / generator.

The invention relates to an artificial heart valve having a two-part design, consisting of an outer artificial heart valve having means for permanently anchoring the artificial heart valve at the implantation site and an inner artificial heart valve, which can be replaced independently of the outer artificial heart valve anchored at the implantation site and can be inserted into the outer artificial heart valve and which has artificial heart valve cusps, wherein the outer artificial heart valve has formations for defined placement of the inner artificial heart valve and the inner artificial heart valve for anchoring the inner artificial heart valve in the outer artificial heart valve. The invention also relates to a device for performing a catheter-based implantation of an artificial heart valve, to a method for explanting an artificial heart valve, and to a method for reimplanting an artificial heart valve.

The application discloses a structure of adjustable back guide vane, which comprises a back guide vane hub, back guide vane blades and mobile blades. The back guide vane blades are fixedly connected to the outer surface of the back guide vane hub. The mobile blades are arranged between the back guide vane blades and are axially movably connected to the outer surface of the back guide vane hub and can move to the end of the back guide vane hub. The front end of the mobile blade and the front end of the back guide vane blade form an acute angle. The application further discloses an artificial heart. The application has the advantages of controlling blood flow.

The invention discloses an artificial heart valve with a clamping structure. The artificial heart valve comprises a first valve seat body, a second valve seat body and an artificial valve leaflet, the second valve seat body is arranged on the outer side of the first valve seat body, and the artificial valve leaflet is arranged between the first valve seat body and the second valve seat body; the second valve seat body is provided with a parting line, the midpoint of the parting line intersects with the central axis of the second valve seat body, and the parting line divides the second valve seat body into two halves. The overall symmetry of the artificial valve is improved, meanwhile, the influence of traditional suture on the peripheral suture edge part of the artificial valve leaflet is avoided, and the service life of the artificial heart valve is prolonged. Meanwhile, the replicability and quantitative production of the whole structure of the artificial valve are guaranteed, and the production efficiency is improved.

The utility model discloses an artificial heart valve testing device, and relates to the technical field of medical instrument detection, the artificial heart valve testing device is characterized in that a first end of a high-transparency compliance valve testing cavity is connected with a first pipeline connecting piece, a second end is connected with a second pipeline connecting piece, and a high-transparency compliance valve model is fixed in a device main body; a simulated native valve clamp is arranged in the high-transparency compliance valve testing cavity, and the simulated native valve clamp clamps an artificial heart valve in the high-transparency compliance valve testing cavity. The first pipeline connecting piece and the second pipeline connecting piece can be connected with an external pipeline, so that the blood flowing environment of a human body can be simulated in the high-transparency compliance valve testing cavity; meanwhile, the simulated native valve and the artificial heart valve are both located in the simulated human body blood flowing environment, the performance of the artificial heart valve implanted into the simulated native valve can be simulated, and the potential risk after the artificial heart valve is implanted is evaluated.