阅读说明：本技术 一种介入式临时左心辅助装置 (Interim left heart auxiliary device of intervention formula ) 是由 解启莲 于 2021-09-25 设计创作，主要内容包括：本发明公开了一种介入式临时左心辅助装置,包括驱动装置,所述驱动装置包括导管,导管远端与驱动器连接,驱动器的动力输出端连接泵血组件,马达远端连接有血液流出笼,血液流出笼通过套管与导流元件连接,所述套管壁内嵌有记忆金属架。本发明装置有助于减少血液的反流现象,不影响左心室主动脉瓣自动泵血,增加泵血量,提高左心辅助效率,介入后套管在记忆金属架恢复后稳定,既能达到心脏辅助的作用,又能减轻左心室的前负荷。(The invention discloses an intervention type temporary left heart auxiliary device which comprises a driving device, wherein the driving device comprises a guide pipe, the far end of the guide pipe is connected with a driver, the power output end of the driver is connected with a blood pumping assembly, the far end of a motor is connected with a blood outflow cage, the blood outflow cage is connected with a flow guide element through a sleeve, and a memory metal frame is embedded in the wall of the sleeve. The device is beneficial to reducing the reflux phenomenon of blood, does not influence the automatic blood pumping of the aortic valve of the left ventricle, increases the blood pumping amount, improves the left heart auxiliary efficiency, and ensures that the sleeve is stable after the memory metal frame is recovered after intervention, thereby achieving the heart auxiliary effect and lightening the preload of the left ventricle.)

1. The utility model provides a temporary left heart auxiliary device of intervention formula, characterized in that, includes drive arrangement (20), flexible tube (10) and occluder subassembly (40), drive arrangement (20) include pipe (21), and pipe (21) distal end is connected with the driver, and pump blood subassembly is connected to power take off end (222) of driver, and the driver distal end is connected with blood outflow cage (24), and blood outflow cage (24) are connected with water conservancy diversion component (26) through sleeve pipe (25), sleeve pipe (25) wall is embedded to have memory wire (251), flexible tube (10) and blood outflow cage (24) closely laminate, and blood outflow cage (24) are gone up and are equipped with blood discharge hole (241) with flexible tube (10) laminating part, and the position of lining up with blood discharge hole (241) is provided with blood egress opening (11) on the flexible tube.

2. The interventional temporary left heart assist device of claim 1, wherein: the blood discharging hole (241) on the side surface of the blood discharging cage (24) and the inner side of the blood discharging opening (11) on the side surface of the flexible tube (10) are smooth, and the inner edge and the outer edge of the blood discharging opening (11) and the blood discharging hole (241) are rounded.

3. The interventional temporary left heart assist device of claim 1, wherein: the driver is a rotary motor (22), the blood pumping assembly comprises an impeller which is coaxially and fixedly connected with a power output end (222) of the motor, the impeller comprises a wheel shaft which is fixedly connected with the power output end (222) of the motor, the side surface of the wheel shaft is fixedly connected with a blade, and the blade is smoothly connected with the wheel shaft.

4. The interventional temporary left heart assist device of claim 1, wherein: the driver is flexible motor (221), and the pump blood subassembly includes the tympanic membrane (224) of being connected with the power take off of motor, and tympanic membrane (224) include with the power take off (222) fixed connection's of flexible motor (221) expansion membrane (2242), expansion membrane (2242) and edge are fixed in the connection membrane (2241) middle part of blood outflow cage (24) distal end and are connected.

5. The interventional temporary left heart assist device of claim 4, wherein: the power output shaft of the telescopic motor (221) is connected with the proximal end of the blood outflow cage (24) through a sealing film (223).

6. The interventional temporary left heart assist device of claim 1, wherein: the flow guide element (26) comprises a trumpet-shaped woven net (261) and a membrane piece (262) for closing the meshes of the woven net (261), and the closed end of the woven net (261) is fixedly connected and communicated with the sleeve (25).

7. The interventional temporary left heart assist device of claim 6, wherein: the knitted net (261) is a net-shaped pipe body which is formed by knitting shape memory alloy and has two open ends, the closing end of the knitted net (261) is connected with the memory metal frame, and the membrane piece (262) is a thin layer which is formed by hot melting of thermoplastic materials on the inner side and the outer side of the knitted net (261).

8. The interventional temporary left heart assist device of claim 1, wherein: the occluder assembly (40) comprises two occluder elements (41) and a flexible push rod (43), wherein the occluder elements (41) are connected in series through a flexible line, the occluder elements (41) are in an I shape, and the proximal occluder elements (41) are detachably connected with the flexible push rod (43).

9. The interventional temporary left heart assist device of claim 8, wherein: scribble antifriction coating on flexible tube (10) inner wall, the outer wall respectively, pipe (21) are interior to be received wire chamber and to be used for the fluid flow fluid chamber, and wire intracavity wire is connected with the driver, and pipe (21) near-end is connected with external control ware, driver casing outside is connected with sensor (30), and sensor (30) switch on with the wire.

10. The interventional temporary left heart assist device of claim 9, wherein: the flow guide element (26) comprises a flow guide wire (27) extending from a memory metal wire in the sleeve (25), the flow guide wire (27) is spirally wound inside the sleeve (25), and two sides of the flow guide wire (27) are fixedly connected with membrane parts (262) respectively.

Technical Field

The invention relates to the field of left heart auxiliary devices, in particular to an intervention type temporary left heart auxiliary device.

Background

Cardiac assist devices, also known as mechanical blood circulation support devices or cardiac pump assemblies, may be introduced into the heart and may be configured to assist or replace natural cardiac function by circulatory pumping or continuous pumping of blood, providing hemodynamic support for cardiogenic shock and acute heart failure.

The patent document with the patent number of CN202022033733.9 applied by the applicant in the earlier stage discloses an integrated minimally invasive catheter type heart auxiliary device, which comprises a blood circulation catheter, an axial flow impeller and a driving motor; the blood flow conduit comprises a pigtail, a blood inflow port, a blood flow channel and a blood outflow port, wherein the pigtail, the blood inflow port, the blood flow channel and the blood outflow port are integrally designed and molded, as shown in figure 1. The heart assist device is introduced into the ascending aorta via the femoral artery by a catheterization procedure, across the aortic valve into the left ventricle, and pumps blood in the left ventricle into the aorta.

After the pigtail, the blood inflow port and part of the blood flow channel are inserted into the left ventricle of the patient, the aortic valve is in a separated state, and after the blood flows into the main artery, the phenomenon that part of the blood flows back from the aorta to the left ventricle can occur based on hemodynamics, so that the blood outflow quantity is partially offset, and the auxiliary efficiency of the heart pump assembly is reduced.

In addition, the existing interventional heart assist device is inserted into the left ventricle through the aorta and the aortic valve, and pumps the blood in the left ventricle into the aorta, but the existing device is obviously not suitable for the patients with serious lesion of the aortic valve and the patients implanted with the artificial aortic valve through the operation.

In view of the above problems, it is desirable to provide a percutaneous intervention type heart assist device which can improve the efficiency of heart pump assistance, expand the application range of the existing heart assist device, and provide a new percutaneous intervention type heart assist device for patients with severe aortic valve lesions and surgically implanted artificial aortic valves.

Disclosure of Invention

The present invention is directed to an intervention type temporary left heart assist device to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a temporary left heart auxiliary device of intervention formula, includes drive arrangement, flexible tube and plugging device subassembly, and drive arrangement includes the pipe, and the pipe distal end is connected with the driver, and the power take off end of driver connects the pump blood subassembly, and the driver distal end is connected with blood outflow cage, and blood outflow cage passes through the sleeve pipe and is connected with the water conservancy diversion component.

The sleeve can be made of biocompatible materials such as polyurethane, polyamide and silicone, a plurality of memory metal wires are embedded in the wall of the sleeve, the number of the memory metal wires can be two, four, six or eight, and six are preferred. The memory metal frame is formed by extending a plurality of memory metal wires along the far end of the sleeve and is fixedly connected with the flow guide element.

The flexible tube is closely attached to the blood outflow cage, a blood discharge hole is formed in the portion, attached to the flexible tube, of the blood outflow cage, and a blood outflow port is formed in the position, aligned with the blood discharge hole, of the flexible tube.

When the auxiliary device is used, the guide wire firstly extends into an aorta through puncture, penetrates through the wall of the aorta and the superior vena cava, then penetrates through the interatrial septum between the right atrium and the left atrium to enable the distal end of the guide wire to be positioned in the left atrium, the expansion sheath catheter enters the left atrium along the guide wire puncture path, and the flexible catheter is inserted into the left atrium along the expansion sheath catheter path; and taking out the guide wire and the expansion sheath tube, inserting the driving device along the inner cavity of the flexible tube to enable the flow guide element to be positioned in the left atrium, and attaching the blood discharge hole of the blood outflow cage to the blood outflow port of the flexible tube to complete the intervention of the auxiliary device.

The memory metal wire is embedded in the sleeve, the sleeve and the flexible pipe are deformed and fixed to an expected shape under the action of the memory metal wire, the structure is stable, and the pressure of the sleeve and the flexible pipe on the puncture opening can be partially offset.

When the driving device works, the blood pumping assembly sends the blood in the left atrium into the aorta through the flow guide element, the sleeve, the blood outlet on the side surface of the blood outflow cage and the blood outflow port of the flexible tube so as to achieve the effect of assisting in pumping blood. This auxiliary device need not pass the aortic valve, can not cause the damage to the aortic valve, helps reducing the palirrhea phenomenon of blood, does not influence left ventricle aortic valve automatic pumping blood, increases the pumping blood volume, improves left heart auxiliary efficiency.

Preferably, the inner sides of the blood discharge hole on the side surface of the blood discharge cage and the blood discharge hole on the side surface of the flexible tube are smooth, and the inner edge and the outer edge of the blood discharge hole and the blood discharge hole are rounded off, so that hemolysis can be reduced, and thrombosis can be prevented.

Preferably, the driver is a rotary motor, the blood pumping assembly comprises an impeller coaxially and fixedly connected with the power output end of the motor, the impeller comprises a wheel shaft fixedly connected with the power output end of the motor, the side surface of the wheel shaft is fixedly connected with blades, and the blades are smoothly connected with the wheel shaft;

the rotary motor drives the impeller to rotate, blood is pumped in a mode of generating axial force through the rotation of the impeller, the blade impeller is smoothly connected, and hemolysis caused in the process of pumping blood by the rotation of the impeller is reduced.

Preferably, the driver is flexible motor, and the blood pumping subassembly includes the tympanic membrane that is connected with the power take off hub of motor, and the tympanic membrane includes the expansion membrane with flexible motor's power take off fixed connection, and the expansion membrane is connected with the connection membrane middle part that the edge is fixed in blood and flows out the cage distal end.

Preferably, the power output shaft of the telescopic motor is connected with the proximal end of the blood outflow cage through a sealing membrane;

the blood is pumped by adopting the matching mode of the telescopic motor, the drumming membrane and the sealing membrane, in the blood pumping process, the blood is only in partial contact with the power output shaft of the telescopic motor, and the power output shaft drives the drumming membrane to move, so that the blood dissolving amount can be greatly reduced.

Preferably, the flow guide element comprises a trumpet-shaped woven net and a membrane piece for closing the meshes of the woven net, and the closed end of the woven net is fixedly connected and communicated with the sleeve.

Preferably, the woven mesh is a mesh-shaped pipe body which is formed by weaving shape memory alloy and has two open ends, the closed end of the woven mesh is connected with the memory metal frame, and the membrane piece is a thin layer formed by hot melting of thermoplastic materials on the inner side and the outer side of the woven mesh;

the braided net woven by the memory alloy can be contracted in the interventional process as a flow guide element, so that the device smoothly enters the left atrium, can be expanded to form a horn shape after entering, promotes the blood in the left atrium to flow in, and keeps enough radial supporting force to prevent the sleeve and the flexible tube from generating displacement.

Preferably, the occluder assembly comprises two occluder elements and a flexible push rod which are connected in series through a flexible line, and the occluder elements are in an I shape; the proximal occluder element is detachably connected with the flexible push rod.

Preferably, the inner wall and the outer wall of the flexible pipe are respectively coated with an antifriction coating, a guide wire cavity and a fluid cavity for fluid flow are accommodated in the guide pipe, a guide wire in the guide wire cavity is connected with the driver, the near end of the guide pipe is connected with an external controller, a sensor is connected outside the driver shell, and the sensor is communicated with the guide wire;

the inner wall and the outer wall of the flexible tube are coated with antifriction coatings, so that the friction force on the tube wall is reduced, the flexible tube is more suitable for weakening damage to heart tissues through the tissues of a patient, and the sensor is used for detecting blood pressure so as to detect the amount of pumped blood in real time.

Preferably, the flow guide element comprises a flow guide wire extending from a memory metal wire in the sleeve, the flow guide wire is spirally wound at the end part of the sleeve, and two sides of the flow guide wire are respectively fixedly connected with the membrane piece.

The spirally coiled flow guide wire easily passes through the flexible tube in the non-stretching state and enters the left atrium, and the flow guide wire made of the memory metal is gradually stretched from inside to outside to form a horn mouth shape, so that tissue damage caused by local tissue tension in the stretching process is avoided.

Compared with the prior art, the invention has the beneficial effects that:

1. through interatrial puncture, a blood inflow port is placed in the left atrium, blood is pumped out from the left atrium by a blood pumping assembly and then is returned to the aorta without passing through the aortic valve, the blood backflow phenomenon is reduced, the automatic blood pumping of the aortic valve of the left ventricle is not influenced, the blood pumping amount is increased, the left heart assist efficiency is improved, the cannula is stable after the cannula is restored after intervention, the heart assist effect can be achieved, and the front load of the left ventricle can be reduced;

2. the blood discharge hole on the side surface of the blood outflow cage and the edge of the blood outflow port on the side surface of the flexible tube are smooth, the sleeve structure on the blood flow path is simpler, the dead angle is less, and the hemolysis problem is favorably reduced;

3. the telescopic motor is matched with the drumming membrane to pump blood, and the power output shaft is connected with the sealing membrane, so that the contact of the blood with a mechanical mechanism is reduced, and the hemolysis is further reduced;

4. the left heart auxiliary device is suitable for atrial septal puncture and is suitable for patients with contraindications such as left ventricular thrombosis and the like which cannot be suitable for conventional auxiliary devices;

5. the spirally wound guide wire is easy to pass through the flexible pipe in a non-stretching state, and tissue damage caused by local tissue tension is avoided in the stretching process;

6. the left heart auxiliary device provides a new left heart auxiliary treatment device for patients with mechanical active valves, biological active valves and other artificial active valves or native active valves which are implanted in vivo through skin, or serious aortic valve lesion, and has great practical significance.

Drawings

FIG. 1 is a schematic diagram of a left ventricular assist heart pump assembly of the prior art and comparative example 1;

FIG. 2 is a schematic view of the present invention in the configuration of an interventional left atrium;

FIG. 3 is a cross-sectional view of the structure of the present invention inserted into the left atrium;

fig. 4 is a schematic structural view of a driving apparatus in embodiment 1 of the present invention;

FIG. 5 is a schematic view of the connection of the flexible tube to the blood outflow cage of the present invention;

FIG. 6 is a schematic structural view of a blood pumping set according to embodiment 2 of the present invention;

FIG. 7 is a cross-sectional view of a blood outflow cage in example 2 of the present invention;

FIG. 8 is a radial cross-sectional view of the bushing of the present invention;

FIG. 9 is a schematic structural view of a sleeve and a braided net according to the present invention;

FIG. 10 is a sectional view of the sleeve and the guide member in example 5 of the present invention;

figure 11 is a schematic structural view of an occluding device assembly of the present invention;

in the figure: 10. a flexible tube; 11. a blood flow outlet; 20. a drive device; 21. a conduit; 22. a rotary motor; 23. a fan blade; 24. blood flows out of the cage; 241. a blood discharge hole; 25. a sleeve; 251. a memory wire; 26. a flow guide element; 261. weaving a net; 262. a membrane member; 27. a flow guide wire; 221. a telescopic motor; 222. a power output end; 223. a sealing film; 224. agitating the membrane; 2241. connecting the films; 2242. expanding the membrane; 30. a sensor; 40. an occluder assembly; 41. an occluder element; 411. blocking the umbrella disc; 42. a flexible wire; 43. a flexible push rod.

Detailed Description

The distal end is the end of the device far from the operator during the interventional operation, and the proximal end is the end of the device closer to the operator during the interventional operation.

Comparative example 1

As shown in fig. 1, a heart assist device of patent No. CN202022033733.9 is shown in fig. 1, and includes a catheter 6, a motor 5, a blood outflow hole 4, a blood flow channel 3, a blood inflow port 2, and a pigtail 1. In use, the blood flow path 3 extends through the aortic valve, the blood inlet 2 and the pigtail 1 are positioned in the left ventricle across the aortic valve, for example with the pigtail 1 abutting the left ventricular wall, and blood in the left ventricle is then pumped into the aorta by the pumping action of the motor 5.

Example 1

As shown in fig. 2-5, an interventional temporary left heart assist device comprises a flexible tube 10 and a driving device 20, wherein the driving device 20 comprises a conduit 21, a distal end of the conduit 21 is connected with a driver, a proximal end of the conduit 21 is connected with an external controller, a distal end of the driver is connected with a blood outflow cage 24, a side surface of the blood outflow cage 24 is provided with a blood discharge hole 241, a distal end of the blood outflow cage 24 is connected with a cannula 25, wherein the driving device 20 comprises a blood pumping assembly in transmission connection with the driver, the driver is a rotary motor 22, the rotary motor 22 is connected with an impeller, the impeller comprises an axle and fan blades 23 smoothly and fixedly connected to the axle, a memory wire 251 is embedded in the inner wall of the cannula 25 connected with the blood outflow cage 24, an end of the cannula 25 is connected with a flow guide element 26, the memory wire 251 gradually recovers after an intervention, and the shape and structure of the assist device are stable, so as to assist the left ventricle to pump blood.

When the auxiliary device is used, the guide wire firstly extends into the aorta, passes through the wall of the aorta and the superior vena cava, then punctures through the interatrial septum between the right atrium and the left atrium to enable the distal end of the guide wire to be positioned in the left atrium, the expansion sheath tube enters the left atrium along the guide wire puncture path, and the flexible tube 10 is inserted into the left atrium along the expansion sheath tube path; and taking out the guide wire and the expansion sheath, inserting the driving device 20 along the inner cavity of the flexible tube 10, enabling the flow guide element 26 to be positioned in the left atrium, and attaching the blood discharge hole 241 on the side surface of the blood outflow cage 24 to the blood outflow port of the flexible tube 10 to complete the intervention of the auxiliary device.

The memory wire 251 is embedded in the sleeve 25, and the sleeve 25 and the flexible tube 10 are deformed and fixed to the expected shape under the action of the memory wire 251, so that the structure is stable, and the pressure of the sleeve 25 and the flexible tube 10 on the puncture can be partially counteracted.

When the driving device 20 works, the rotary motor 22 drives the axial-flow impeller to rotate to generate an axial force, and the left atrial blood is sent to the aorta through the diversion element 26, the sleeve 25, the blood outlet 241 on the side surface of the blood outflow cage 24 and the blood outflow port of the flexible tube 10, so as to achieve the effect of assisting blood pumping. This auxiliary device need not pass the aortic valve, helps reducing the palirrhea phenomenon of blood, also can avoid aortic valve damage simultaneously, does not influence left ventricle aortic valve automatic pumping blood, increases the pump blood volume, improves left heart auxiliary efficiency.

Example 2

As shown in fig. 2, 3, 6 and 7, an interventional temporary left heart assist device comprises a catheter 21, a distal end of the catheter 21 is connected with a driving device 20, a distal end of the driving device 20 is connected with a blood outflow cage 24, a distal end of the blood outflow cage 24 is connected with a connecting sleeve 25, wherein the driving device 20 comprises a driver, a blood pumping assembly in transmission connection with the driver, the driver adopts a telescopic motor 221, the telescopic motor 221 is connected with a bulging membrane 224, the bulging membrane 224 is connected with the distal end of the blood outflow cage 24, a sealing membrane 223 is connected with the proximal end of the blood outflow cage 24, the bulging membrane 224 comprises an expanding membrane 2242 fixedly connected with a power output end 222 of the telescopic motor 221, the expanding membrane 2242 is connected with a central connecting membrane 2241, a gap is left between the expanding membrane 2242 and the connecting membrane 2241, the radius of the expanding membrane 2242 is larger than the radius of the hollow part in the connecting membrane 2241, and the expanding membrane 2242, the connecting membranes 2241 and 223 have elasticity, the expansion membrane 2242 and the connecting membrane 2241 are connected in a multi-point mode, a gap is reserved between the connecting points, a memory metal wire 251 is embedded in the inner wall of a sleeve 25 connected with the blood outflow cage 24, and the end portion of the sleeve 25 is connected with the flow guide element 26.

When the telescopic motor 221 is operated, the telescopic motor 221 extends to drive the expansion membrane 2242 to expand, the gap between the expansion membrane 2242 and the connection membrane 2241 is enlarged, so that blood in the sleeve 25 flows into the space between the bulging membrane 224 and the sealing membrane 223 of the blood outflow cage 24 from the gap between the expansion membrane 2242 and the connection membrane 2241, then the power output end 222 of the telescopic motor 221 drives the bulging membrane 224 to contract, the bulging membrane 224 is attached to the connection membrane 2241, the space between the blood outflow cage 24 and the sleeve 25 is closed, the blood between the bulging membrane 224 and the sealing membrane 223 in the blood outflow cage 24 is pressed out from the blood outlet 241 on the side of the blood outflow cage 24 to enter the aorta, in the process, the blood flows under the pressure of the bulging membrane 224, compared with a mechanical blood pumping method, the damage probability of red blood cells can be reduced, hemolysis can be reduced, and the blood outlet 241 of the blood outflow cage 24 is set to be circular or elliptical, the edges of the blood discharge port 241 are rounded to further reduce hemolysis.

Example 3

As shown in fig. 2, 3 and 9, an interventional temporary left heart assist device comprises a driving device 20, the driving device 20 comprises a conduit 21, the distal end of the conduit 21 is connected with a driver, the power output end 222 of the driver is connected with a blood pumping assembly, the distal end of a motor is connected with a blood outflow cage 24, the blood outflow cage 24 is connected with a flow guide element 26 through a sleeve 25, a memory wire 251 is embedded in the inner wall of the sleeve 25, the flow guide element 26 connected with the end of the sleeve 25 is a trumpet-shaped woven mesh 261 formed by weaving a memory alloy, the closing end of the woven mesh 261 is fixed with the memory wire 251 in the sleeve 25, and a membrane 262 formed by hot melting a thermoplastic material on the woven mesh 261 is respectively connected in and outside the woven mesh 261.

The memory alloy used by the memory metal wire 251 and the woven net 261 is nickel-titanium alloy, the horn-shaped woven net 261 contracts when being inserted into the flexible tube 10, the woven net 261 expands after entering the left ventricle through the flexible tube 10 to form a horn shape, blood in the left ventricle is promoted to flow into the sleeve 25, the horn-shaped woven net 261 can keep enough radial supporting force in the left ventricle to prevent the sleeve 25 from generating displacement, the memory metal wire 251 in the sleeve 25 is matched for supporting, safety is guaranteed, the membrane 2241 parts 262 are connected to the inner side and the outer side of the woven net 261, the woven net 261 can stretch and retract, a sealing effect is kept after expansion, and blood flows into the sleeve 25 along the inner wall.

Example 4

As shown in fig. 2-9, an interventional temporary left heart assist device comprises a driving device 20, the driving device 20 includes a conduit 21, a distal end of the conduit 21 is connected to a driver, a power output end 222 of the driver is connected to a blood pumping assembly, a distal end of a motor is connected to a blood outflow cage 24, the blood outflow cage 24 is connected to a flow guide element 26 through a sleeve 25, a guide wire connected to the driver is accommodated in a guide wire cavity in the conduit 21, a fluid is accommodated in the fluid cavity, the fluid may be physiological saline or glucose solution, etc., the fluid flows into a main artery through a blood discharge hole and inside a rotary motor to prevent blood from entering the rotary motor to generate thrombus, and can also take away part of heat generated by rotation of the rotary motor. The outside of the housing of the actuator is connected to the inductive head of the sensor 30, and the inside and outside of the flexible tube 10 are coated with antifriction coatings.

The guide wire cavity in the catheter 21 is internally provided with a guide wire connected with the driver and used for connecting an external power supply, the fluid cavity is internally provided with fluid, the fluid can be physiological saline or glucose solution and the like, and the fluid flows into the main artery through the inside of the rotary motor and the blood removing hole and is used for preventing blood from entering the inside of the rotary motor to generate thrombus and also can take away part of heat generated by the rotation of the rotary motor. The sensor 30 is an optical pressure sensor 30 working on the fabry-perot principle, the sensor 30 is used for detecting the aortic blood pressure, and the flexible tube 10 is used as a delivery sheath coated with a friction reducing coating, so that the friction force on the tube wall can be reduced, and the flexible tube is more suitable for passing through the tissue of a patient to reduce the damage to the heart tissue.

Example 5

As shown in fig. 2, 3 and 10, an interventional temporary left heart assist device is an interventional temporary left heart assist device, which includes a driving device 20, the driving device 20 includes a conduit 21, a distal end of the conduit 21 is connected with a driver, a power output end 222 of the driver is connected with a blood pumping assembly, a distal end of a motor is connected with a blood outflow cage 24, the blood outflow cage 24 is connected with a flow guide element 26 through a sleeve 25, a memory metal wire 251 is embedded in an inner wall of the sleeve 25, the flow guide element 26 connected with an end of the sleeve 25 includes a flow guide wire 27, the flow guide wire 27 is spirally wound in the sleeve, and two sides of the flow guide wire 27 are fixedly connected with a membrane 262.

In the process that the sleeve 25 enters the left ventricle through the flexible tube 10, the flow guide wire 27 connected with the end part of the sleeve 25 is coiled at the end part of the sleeve 25 in a spiral shape, so that the outer diameter of the flow guide element 26 is smaller than that of the sleeve, after the flow guide element enters the left ventricle through the flexible tube 10, the flow guide wire 27 made of memory metal is slowly opened, namely, the spiral flow guide wire 27 gradually blooms from inside to outside in the left ventricle to form a horn shape, the contact part of the flow guide wire 27 and the membrane 262 connected with the flow guide wire 27 with the tissue in the left ventricle is smaller in the process of blooming, and the contact surface is an arc surface, so that the tissue damage caused by the tension generated on the local tissue by synchronous expansion of each part can be avoided.

Example 6

As shown in fig. 2, 3 and 11, the interventional temporary left heart assist device comprises an occluder assembly 40, wherein the occluder assembly 40 is matched with a flexible tube 10, the occluder assembly 40 comprises two occluder elements 41 and a flexible push rod 43 which are sequentially connected in series through a flexible wire 42, wherein the occluder elements 41 are in an I shape, and the occluder elements 41 comprise two occluder umbrella disks 411 which are made of memory metal alloy and are symmetrically connected with each other.

When the auxiliary device is intervened in the heart and plays an auxiliary role, so that a patient turns better, the driving device 20 stops working, the driving device 20 is taken out, the occluder assembly 40 is placed into the inner cavity of the flexible tube 10 through the flexible push rod 43, in the process of moving the distal end part of the flexible tube 10 to the outside, the occluding umbrella disk 411 which is positioned at the distal end in the occluder element 41 and is close to the distal end is positioned at one side of the farthest puncture hole, the other occluding umbrella disk 411 in the same occluder element 41 is positioned at the other side, the waist part which is connected with the two occluding umbrella disks 411 in the same occluder element 41 penetrates through the puncture hole to be connected with the two occluding umbrella disks 411, then in the process of moving the flexible tube 10 to the outside, the occluding umbrella disk 411 which is positioned at the distal end of the proximal occluder element 41 is positioned at the inner side of the superior vena, the other occluding umbrella disk 411 is positioned at the inner side of the aorta, and in consideration of the practical operation process, an operator necessarily selects the closest part of the aorta and the superior vena, the distance is very small and even the joint is realized, so that the operation can be simplified by simultaneously plugging the superior vena cava puncture and the aorta puncture during plugging, and the risk is reduced.

The blocking umbrella disc 411 made of memory metal is opened after the constraint of the flexible tube 10 is lost, the flexible wire 42 has certain elasticity and good biocompatibility, until the flexible tube 10 is taken out, all puncture holes are blocked, and the blocking device component 40 is permanently left in the body.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.