Mechanical extracorporeal ventricle auxiliary device

Abstract

The invention relates to the technical field of medical instruments, in particular to a mechanical extracorporeal ventricular auxiliary device which comprises a bowl-shaped shell, an elastic bag cavity is fixedly embedded in the bowl-shaped shell, a bowl opening of the bowl-shaped shell is in sealed butt joint with a round-cup-shaped shell, and the round-cup-shaped shell comprises an arc-groove-shaped rear shell, an arc-groove-shaped front shell, a round bottom plate and two arch-shaped supporting blocks. A rear positioning plate is fixed to the left portion of the inner side face of the arc-groove-shaped rear shell, a pressure sensor is fixed to the upper surface of the rear positioning plate, a transverse rotating shaft is jointly and rotationally supported in the two supporting concave holes, and a cam is fixedly assembled in the middle of the side face of the transverse rotating shaft; the cam separably extrudes the lower side capsule wall of the elastic capsule cavity on one hand and separably extrudes the pressure sensor on the other hand. The ventricular assist device solves the problems that an existing ventricular assist device is high in operation cost, large in operation difficulty, large in operation injury, poor in working stability and prone to causing thrombus, and is suitable for ventricular assist.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a mechanical extracorporeal ventricular assist device. Background Art

[0002] A ventricular assist device is a mechanical device that assists the heart in supplying blood to the aorta. It is used for patients with heart failure or waiting for a heart transplant. At present, there are three main types of ventricular assist devices in clinical use: the first type is an implantable ventricular assist device, the second type is a magnetically suspended extracorporeal ventricular assist device, and the third type is a pneumatically invasive ventricular assist device. Due to the limitations of their own structures, these three types of ventricular assist devices have the following problems: First, implantable ventricular assist devices require implantation surgery to achieve treatment, which leads to high surgical costs, greater surgical difficulty, and greater surgical damage. Second, the magnetically suspended extracorporeal ventricular assist device is limited by magnetic levitation technology and is easily affected by external motion and electromagnetic interference, so its working stability is poor. Third, the pneumatically invasive ventricular assist device is not stable enough in pumping force, which easily causes blood cell aggregation during operation, thereby easily leading to thrombosis. Based on this, it is necessary to invent a mechanical extracorporeal ventricular assist device to solve the problems of high surgical costs, greater surgical difficulty, greater surgical damage, poor working stability, and easy to cause thrombosis of existing ventricular assist devices. Summary of the invention

[0003] In order to solve the problems of high surgical cost, great surgical difficulty, great surgical damage, poor working stability and easy to cause thrombosis of existing ventricular assist devices, the present invention provides a mechanical extracorporeal ventricular assist device.

[0004] The present invention is achieved by adopting the following technical solutions: A mechanical extracorporeal ventricular assist device includes a bowl-shaped housing; The bowl mouth of the bowl-shaped shell faces downward, and an assembly hole is provided through the edge of the bowl mouth; an elastic sac cavity is fixedly embedded in the bowl-shaped shell; a nozzle is sealed and connected to the upper sac wall of the elastic sac cavity, and the nozzle passes through the assembly hole; a catheter is sealed and connected to the nozzle; an end wall is provided at the tail end of the catheter, and a threading hole is provided through the center of the end wall; a blood inlet and a bleeding port are provided through the side wall of the tail of the catheter, and the distance between the bleeding port and the end wall is greater than the distance between the blood inlet and the end wall; a blood inlet check valve is fixedly embedded in the blood inlet; a bleeding check valve is fixedly embedded in the bleeding port; The bowl mouth of the bowl-shaped shell is sealed and docked with a round cup-shaped shell; the round cup-shaped shell includes an arc groove-shaped rear shell, an arc groove-shaped front shell, a circular bottom plate, and two arched support blocks; the notch of the arc groove-shaped front shell is sealed and docked with the notch of the arc groove-shaped rear shell; the front part of the upper end surface edge of the circular bottom plate is fixed as a whole with the lower end surface of the arc groove-shaped front shell; the rear part of the upper end surface edge of the circular bottom plate is sealed and docked with the lower end surface of the arc groove-shaped rear shell; the rear parts of the arc-shaped side surfaces of the two arched support blocks are fixed as a whole with the upper end of the inner side surface of the arc groove-shaped rear shell; the front parts of the arc-shaped side surfaces of the two arched support blocks are sealed and docked with the upper end of the inner side surface of the arc groove-shaped front shell; a supporting concave hole is respectively provided on the flat side surfaces of the two arched support blocks; A rear positioning plate is fixed to the left part of the inner side surface of the arc-groove-shaped rear shell; a rear positioning flat groove is provided on the front end surface of the rear positioning plate; a rear positioning notch A is provided on the right part of the lower edge of the notch of the rear positioning flat groove; a rear positioning notch B is provided on the left part of the upper and lower edges of the notch of the rear positioning flat groove; a pressure sensor is fixed to the upper surface of the rear positioning plate; a front positioning plate is fixed to the left part of the inner side surface of the arc-groove-shaped front shell; a front positioning flat groove is provided on the rear end surface of the front positioning plate, and the front positioning flat groove and the rear positioning flat groove are connected to form a positioning flat cavity; a front positioning notch A is provided on the right part of the lower edge of the notch of the front positioning flat groove, and the front positioning notch A is connected to the rear positioning notch A to form a positioning hole A; a front positioning notch B is provided on the left part of the upper and lower edges of the notch of the front positioning flat groove, and two front positioning notches B are connected to two rear positioning notches B to form two positioning holes B; a touch screen is fixed through the side surface of the arc-groove-shaped front shell; A driving motor is fixed on the upper end surface of the circular bottom plate, and the output shaft of the driving motor rotates and passes through the positioning hole A; a spur gear A is fixedly installed on the side of the output shaft of the driving motor, and the spur gear A is rotatably embedded in the positioning flat cavity; a vertical rotating shaft is supported and rotated together in two positioning holes B; a spur gear B is fixedly installed on the lower part of the side of the vertical rotating shaft, and the spur gear B is meshed with the spur gear A; a bevel gear A is fixedly installed on the upper end of the side of the vertical rotating shaft; a transverse rotating shaft is supported and rotated together in two supporting concave holes; a bevel gear B is fixedly installed on the left part of the side of the transverse rotating shaft, and the bevel gear B is meshed with the bevel gear A; a cam is fixedly installed in the middle part of the side of the transverse rotating shaft; the cam can detachably squeeze the lower side wall of the elastic sac cavity on the one hand, and can detachably squeeze the pressure sensor on the other hand; A controller is fixed in the round cup-shaped shell; the input end of the controller is connected to the output end of the pressure sensor; the output end of the controller is connected to the control end of the drive motor; and the controller is bidirectionally connected to the touch screen.

[0005] During work, the operating physician first inserts the guide wire through the patient's femoral artery, allowing the guide wire to enter the left ventricle through the aortic valve, and then inserts the extracorporeal part of the guide wire through the wire insertion hole, and then inserts the catheter into the patient's body along the guide wire, so that on the one hand the blood inlet is inserted into the patient's left ventricle, and on the other hand the bleeding outlet is inserted into the patient's aorta.

[0006] The specific working process is as follows: the output shaft of the driving motor drives the cam to rotate through the spur gear A, spur gear B, vertical shaft, bevel gear A, bevel gear B, and transverse shaft in sequence, so that the cam periodically squeezes the lower wall of the elastic sac cavity, thereby pumping blood from the left ventricle to the aorta. The specific pumping process is as follows: when the cam does not squeeze the lower wall of the elastic sac cavity (such as Fig. 27 As shown in the figure, the lower wall of the elastic sac cavity is flattened, the elastic sac cavity is in a diastolic state, and negative pressure is formed in the elastic sac cavity. Under the action of negative pressure, the blood inlet check valve opens (the bleeding check valve closes), and the blood in the left ventricle flows into the elastic sac cavity through the blood inlet, catheter, and nozzle in sequence. When the cam squeezes the lower wall of the elastic sac cavity (as shown in the figure), the elastic sac cavity is in a diastolic state, and negative pressure is formed in the elastic sac cavity. Under the action of negative pressure, the blood inlet check valve opens (the bleeding check valve closes), and the blood in the left ventricle flows into the elastic sac cavity through the blood inlet, catheter, and nozzle in sequence. Fig.28 As shown in the figure, the lower wall of the elastic cyst cavity is concave, the elastic cyst cavity is in a contracted state, and positive pressure is formed in the elastic cyst cavity. Under the positive pressure, the bleeding check valve opens (the blood inlet check valve is closed), and the blood in the elastic cyst cavity flows into the aorta through the nozzle, catheter, and bleeding port in sequence.

[0007] At the same time, the cam periodically squeezes the pressure sensor, causing the pressure sensor to output a periodic signal in real time. The controller calculates the rotation period of the cam in real time based on the periodic signal, and then calculates the speed of the drive motor and the blood pumping flow rate in real time. When the blood pumping flow rate deviates from the preset normal value, the controller adjusts the speed of the drive motor in real time based on the calculation result, causing the rotation period of the cam to change, thereby causing the blood pumping flow rate to return to normal, thereby ensuring the patient's life safety.

[0008] In the above process, the blood pumping flow rate, the rotation period of the cam, and the speed of the drive motor are all displayed in real time on the touch screen. The touch screen can be used to set the normal value of the blood pumping flow rate and send control instructions to the controller, which controls the operation of the drive motor according to the control instructions.

[0009] Based on the above process, compared with the existing ventricular assist device, the mechanical extracorporeal ventricular assist device described in the present invention is based on a new structure and has the following advantages: First, compared with the implantable ventricular assist device, the present invention does not need to be treated through implantation surgery, but can be treated only through interventional surgery, thereby effectively reducing the cost of surgery, effectively reducing the difficulty of surgery, and effectively reducing surgical damage. Second, compared with the magnetic levitation extracorporeal suspension ventricular assist device, the present invention is not limited by magnetic levitation technology, and is therefore not affected by external motion and electromagnetic interference, thereby effectively improving the working stability. Third, compared with the pneumatic interventional ventricular assist device, the present invention uses a cam to periodically squeeze the elastic sac cavity to pump blood, so its pumping force is more stable, thereby effectively avoiding blood cell aggregation during the working process, thereby effectively avoiding thrombosis.

[0010] Furthermore, an elastic cone is fixedly embedded in the catheter, and the elastic cone is located between the blood inlet check valve and the bleeding check valve; the thick end of the elastic cone faces the end wall of the catheter. When working, the thin end of the elastic cone opens under the action of negative pressure to ensure smooth blood flow, and closes under the action of positive pressure to stop blood from passing, thereby preventing blood from flowing out of the threading hole.

[0011] Furthermore, a rear positioning block is fixed to the right part of the inner side surface of the arc groove-shaped rear shell; a front positioning block is fixed to the right part of the inner side surface of the arc groove-shaped front shell; and the controller is fixed to the left side surface of the rear positioning block and the left side surface of the front positioning block at the same time. When working, the rear positioning block and the front positioning block function to reliably fix the controller in the round cup-shaped shell.

[0012] Furthermore, the touch screen is provided with two communication interfaces, and a heart rate probe is detachably plugged into one of the communication interfaces. During operation, the heart rate of the patient can be measured in real time through the heart rate probe, and the measurement result is displayed in real time on the touch screen.

[0013] The present invention effectively solves the problems of existing ventricular assist devices, such as high surgical cost, high surgical difficulty, large surgical damage, poor working stability, and easy to cause thrombosis, and is suitable for ventricular assist. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 yes Figure 1 Partial structure diagram Figure 1 .

[0016] Figure 3 yes Figure 2 Schematic diagram of part of the structure.

[0017] Figure 4 yes Figure 3 Schematic diagram of part of the structure.

[0018] Figure 5 yes Figure 4 Schematic diagram of part of the structure.

[0019] Figure 6 yes Figure 5 Schematic diagram of part of the structure.

[0020] Figure 7 yes Figure 1 Partial structure diagram Figure 2 .

[0021] Figure 8 yes Figure 7 A partial enlarged view of point A in the middle.

[0022] Fig. 9 yes Figure 7 A partial enlarged view of point B in the middle.

[0023] Fig.10 yes Figure 7 sectional view of .

[0024] Fig.11 yes Fig.10 A partial enlarged view of point C in the middle.

[0025] Fig.12 yes Fig.10 A partial enlarged view of point D in the middle.

[0026] Fig.13 yes Figure 1 Another angle diagram of the structure.

[0027] Fig.14 yes Fig.13 Partial structure diagram Figure 1 .

[0028] Fig.15 yes Fig.14 Schematic diagram of part of the structure.

[0029] Fig.16 yes Fig.15 Schematic diagram of part of the structure.

[0030] Fig.17 yes Fig.16 Schematic diagram of part of the structure.

[0031] Fig.18 yes Fig.13 Partial structure diagram Figure 2 .

[0032] Fig.19 yes Fig.18 A partial enlarged view of point E in the middle.

[0033] Fig. 20 yes Fig.18 sectional view of .

[0034] Fig.21 yes Fig. 20 A partial enlarged view of point F in the middle.

[0035] Fig. 22 yes Fig. 20 A partial enlarged view of point G in the middle.

[0036] Fig.23 It is a structural schematic diagram of the bowl-shaped shell in the present invention.

[0037] Fig.24 It is a structural schematic diagram of the elastic sac cavity, the nozzle, the transverse rotating shaft and the cam in the present invention.

[0038] Fig.25 It is a structural schematic diagram of the arc groove front shell, the circular bottom plate and the touch screen in the present invention.

[0039] Fig.26 It is a structural schematic diagram of the heart rate probe of the present invention.

[0040] Fig. 27 The working state reference of the present invention Figure 1 .

[0041] Fig.28 The working state reference of the present invention Figure 2 .

[0042] In the figure: 1-bowl-shaped shell, 1.1-assembly hole, 2-elastic sac cavity, 3-mouth, 4-catheter, 4.1-threading hole, 4.2-blood inlet, 4.3-bleeding outlet, 5-blood inlet check valve, 6-bleeding check valve, 7-arc groove rear shell, 8-arc groove front shell, 9-round bottom plate, 10-arch support block, 10.1-support concave hole, 11-rear positioning plate, 11.1-rear positioning flat groove, 11.2-rear positioning notch A, 11.3-rear positioning notch B, 12-pressure Sensor, 13-front positioning plate, 13.1-front positioning flat groove, 13.2-front positioning notch A, 13.3-front positioning notch B, 14-touch screen, 14.1-communication interface, 15-drive motor, 16-spur gear A, 17-vertical shaft, 18-spur gear B, 19-bevel gear A, 20-lateral shaft, 21-bevel gear B, 22-cam, 23-controller, 24-elastic cone, 25-rear positioning block, 26-front positioning block, 27-heart rate probe. DETAILED DESCRIPTION

[0043] A mechanical extracorporeal ventricular assist device comprises a bowl-shaped housing 1; The bowl mouth of the bowl-shaped shell 1 faces downward, and an assembly hole 1.1 is provided through the edge of the bowl mouth; an elastic sac cavity 2 is fixedly embedded in the bowl-shaped shell 1; a nozzle 3 is sealed and connected to the upper sac wall of the elastic sac cavity 2, and the nozzle 3 passes through the assembly hole 1.1; a catheter 4 is sealed and connected to the nozzle 3; an end wall is provided at the tail end of the catheter 4, and a threading hole 4.1 is provided through the center of the end wall; a blood inlet 4.2 and a bleeding port 4.3 are provided through the side wall of the tail of the catheter 4, and the distance between the bleeding port 4.3 and the end wall is greater than the distance between the blood inlet 4.2 and the end wall; a blood inlet check valve 5 is fixedly embedded in the blood inlet 4.2; a bleeding check valve 6 is fixedly embedded in the bleeding port 4.3; The bowl mouth of the bowl-shaped shell 1 is sealed and docked with a round cup-shaped shell; the round cup-shaped shell includes an arc groove-shaped rear shell 7, an arc groove-shaped front shell 8, a circular bottom plate 9, and two arched support blocks 10; the notch of the arc groove-shaped front shell 8 is sealed and docked with the notch of the arc groove-shaped rear shell 7; the front part of the upper end surface edge of the circular bottom plate 9 is fixed as a whole with the lower end surface of the arc groove-shaped front shell 8; the rear part of the upper end surface edge of the circular bottom plate 9 is sealed and docked with the lower end surface of the arc groove-shaped rear shell 7; the rear parts of the arc-shaped side surfaces of the two arched support blocks 10 are fixed as a whole with the upper ends of the inner side surfaces of the arc groove-shaped rear shell 7; the front parts of the arc-shaped side surfaces of the two arched support blocks 10 are sealed and docked with the upper ends of the inner side surfaces of the arc groove-shaped front shell 8; the flat sides of the two arched support blocks 10 are each provided with a supporting recessed hole 10.1; A rear positioning plate 11 is fixed to the left side of the inner side of the arc groove-shaped rear shell 7; a rear positioning flat groove 11.1 is provided on the front end surface of the rear positioning plate 11; a rear positioning notch A11.2 is provided on the right side of the lower edge of the notch of the rear positioning flat groove 11.1; a rear positioning notch B11.3 is provided on the left side of the upper and lower edges of the notch of the rear positioning flat groove 11.1; a pressure sensor 12 is fixed to the upper surface of the rear positioning plate 11; a front positioning plate 13 is fixed to the left side of the inner side of the arc groove-shaped front shell 8; a front positioning flat groove 13.1 is provided on the rear end surface of the front positioning plate 13, and the front ... The front flat groove 13.1 is connected with the rear positioning flat groove 11.1 to form a positioning flat cavity; a front positioning notch A13.2 is provided at the right part of the lower edge of the notch of the front positioning flat groove 13.1, and the front positioning notch A13.2 is connected with the rear positioning notch A11.2 to form a positioning hole A; a front positioning notch B13.3 is provided at the left part of the upper and lower edges of the notch of the front positioning flat groove 13.1, and the two front positioning notches B13.3 are connected with the two rear positioning notches B11.3 to form two positioning holes B; a touch screen 14 is fixed through the side of the arc groove-shaped front shell 8; A driving motor 15 is fixed to the upper end surface of the circular bottom plate 9, and the output shaft of the driving motor 15 rotates and passes through the positioning hole A; a spur gear A16 is fixedly installed on the side of the output shaft of the driving motor 15, and the spur gear A16 is rotatably embedded in the positioning flat cavity; a vertical rotating shaft 17 is rotatably supported in two positioning holes B; a spur gear B18 is fixedly installed on the lower part of the side of the vertical rotating shaft 17, and the spur gear B18 is meshed with the spur gear A16; a bevel gear A19 is fixedly installed on the upper end of the side of the vertical rotating shaft 17; a transverse rotating shaft 20 is rotatably supported in two supporting recessed holes 10.1; a bevel gear B21 is fixedly installed on the left part of the side of the transverse rotating shaft 20, and the bevel gear B21 is meshed with the bevel gear A19; a cam 22 is fixedly installed in the middle part of the side of the transverse rotating shaft 20; the cam 22 can detachably squeeze the lower side wall of the elastic sac cavity 2 on the one hand, and can detachably squeeze the pressure sensor 12 on the other hand; A controller 23 is fixed in the round cup-shaped housing; the input end of the controller 23 is connected to the output end of the pressure sensor 12 ; the output end of the controller 23 is connected to the control end of the drive motor 15 ; and the controller 23 is bidirectionally connected to the touch screen 14 .

[0044] An elastic cone 24 is fixedly embedded in the catheter 4 , and the elastic cone 24 is located between the blood inlet check valve 5 and the bleeding check valve 6 ; the thick end of the elastic cone 24 faces the end wall of the catheter 4 .

[0045] A rear positioning block 25 is fixed to the right inner side of the arc groove rear shell 7 ; a front positioning block 26 is fixed to the right inner side of the arc groove front shell 8 ; the controller 23 is fixed to the left side of the rear positioning block 25 and the left side of the front positioning block 26 at the same time.

[0046] The touch screen 14 is provided with two communication interfaces 14 . 1 , and a heart rate probe 27 is detachably plugged into one of the communication interfaces 14 . 1 .

[0047] In specific implementation, the elastic capsule cavity 2 is made of rubber. The blood inlet check valve 5 and the bleeding check valve 6 are both duckbill valves. The diameter of the spur gear B18 is greater than the diameter of the spur gear A16.

[0048] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A mechanical extracorporeal ventricular assist device, characterized in that: It comprises a bowl-shaped housing (1); The bowl mouth of the bowl-shaped shell (1) faces downward, and an assembly hole (1.1) is provided through the edge of the bowl mouth; an elastic sac cavity (2) is fixedly embedded in the bowl-shaped shell (1); a nozzle (3) is sealedly connected to the upper sac wall of the elastic sac cavity (2), and the nozzle (3) passes through the assembly hole (1.1); a catheter (4) is sealedly connected to the upper part of the nozzle (3); an end wall is provided at the tail end of the catheter (4), and a threading hole (4.1) is provided through the center of the end wall; a blood inlet (4.2) and a bleeding port (4.3) are provided through the side wall of the tail of the catheter (4), and the distance between the bleeding port (4.3) and the end wall is greater than the distance between the blood inlet (4.2) and the end wall; a blood inlet check valve (5) is fixedly embedded in the blood inlet (4.2); and a bleeding check valve (6) is fixedly embedded in the bleeding port (4.3); The bowl mouth of the bowl-shaped shell (1) is sealedly connected to a round cup-shaped shell; the round cup-shaped shell comprises an arc groove-shaped rear shell (7), an arc groove-shaped front shell (8), a round bottom plate (9), and two arched support blocks (10); the notch of the arc groove-shaped front shell (8) is sealedly connected to the notch of the arc groove-shaped rear shell (7); the front edge of the upper end surface of the round bottom plate (9) is fixed as a whole with the lower end surface of the arc groove-shaped front shell (8); the rear edge of the upper end surface of the round bottom plate (9) is sealedly connected to the lower end surface of the arc groove-shaped rear shell (7); the rear parts of the arc-shaped side surfaces of the two arched support blocks (10) are fixed as a whole with the upper ends of the inner side surfaces of the arc groove-shaped rear shell (7); the front parts of the arc-shaped side surfaces of the two arched support blocks (10) are sealedly connected to the upper ends of the inner side surfaces of the arc groove-shaped front shell (8); and the flat side surfaces of the two arched support blocks (10) are each provided with a supporting concave hole (10.1); A rear positioning plate (11) is fixed to the left portion of the inner side surface of the arc groove-shaped rear shell (7); a rear positioning flat groove (11.1) is provided on the front end surface of the rear positioning plate (11); a rear positioning notch A (11.2) is provided on the right portion of the lower edge of the notch of the rear positioning flat groove (11.1); a rear positioning notch B (11.3) is provided on the left portions of the upper and lower edges of the notch of the rear positioning flat groove (11.1); a pressure sensor (12) is fixed to the upper surface of the rear positioning plate (11); a front positioning plate (13) is fixed to the left portion of the inner side surface of the arc groove-shaped front shell (8); a front positioning flat groove (13.1) is provided on the rear end surface of the front positioning plate (13), and The front positioning flat groove (13.1) and the rear positioning flat groove (11.1) are connected to form a positioning flat cavity; a front positioning notch A (13.2) is provided at the right part of the lower edge of the notch of the front positioning flat groove (13.1), and the front positioning notch A (13.2) and the rear positioning notch A (11.2) are connected to form a positioning hole A; a front positioning notch B (13.3) is provided at the left part of the upper and lower edges of the notch of the front positioning flat groove (13.1), and the two front positioning notches B (13.3) and the two rear positioning notches B (11.3) are connected to form two positioning holes B; a touch screen (14) is fixed through the side of the arc groove-shaped front shell (8); A driving motor (15) is fixed to the upper end surface of the circular bottom plate (9), and the output shaft of the driving motor (15) rotates and penetrates the positioning hole A; a spur gear A (16) is fixedly mounted on the side of the output shaft of the driving motor (15), and the spur gear A (16) is rotatably embedded in the positioning flat cavity; a vertical rotating shaft (17) is rotatably supported in the two positioning holes B; a spur gear B (18) is fixedly mounted on the lower part of the side of the vertical rotating shaft (17), and the spur gear B (18) is meshed with the spur gear A (16); the vertical rotating shaft (1 7) is fixedly mounted with a bevel gear A (19) at the upper end of the side surface; a transverse rotating shaft (20) is rotatably supported in the two supporting recessed holes (10.1); a bevel gear B (21) is fixedly mounted on the left side of the side surface of the transverse rotating shaft (20), and the bevel gear B (21) is meshed with the bevel gear A (19); a cam (22) is fixedly mounted on the middle part of the side surface of the transverse rotating shaft (20); the cam (22) can detachably squeeze the lower side wall of the elastic sac cavity (2) on the one hand, and can detachably squeeze the pressure sensor (12) on the other hand; A controller (23) is fixed in the round cup-shaped housing; an input end of the controller (23) is connected to an output end of the pressure sensor (12); an output end of the controller (23) is connected to a control end of a drive motor (15); and the controller (23) is bidirectionally connected to the touch screen (14).

2. A mechanical extracorporeal ventricular assist device according to claim 1, characterized in that: An elastic cone (24) is fixedly embedded in the catheter (4), and the elastic cone (24) is located between the blood inlet check valve (5) and the bleeding check valve (6); the thick end of the elastic cone (24) faces the end wall of the catheter (4).

3. A mechanical extracorporeal ventricular assist device according to claim 1, characterized in that: A rear positioning block (25) is fixed to the right portion of the inner side surface of the arc groove-shaped rear shell (7); a front positioning block (26) is fixed to the right portion of the inner side surface of the arc groove-shaped front shell (8); and the controller (23) is fixed to the left side surface of the rear positioning block (25) and the left side surface of the front positioning block (26) at the same time.

4. A mechanical extracorporeal ventricular assist device according to claim 1, characterized in that: The touch screen (14) is provided with two communication interfaces (14.1), and a heart rate probe (27) is detachably plugged into one of the communication interfaces (14.1).

5. The mechanical extracorporeal ventricular assist device according to claim 1, characterized in that: The elastic sac cavity (2) is made of rubber.

6. A mechanical extracorporeal ventricular assist device according to claim 1, characterized in that: The blood inlet check valve (5) and the bleeding check valve (6) are both duckbill valves.

7. A mechanical extracorporeal ventricular assist device according to claim 1, characterized in that: The diameter of the spur gear B (18) is larger than the diameter of the spur gear A (16).

Images