Pulse wave simulation teaching device

Abstract

This application belongs to the field of medical device technology and discloses a pulse wave simulation teaching device, including a host computer, a motor, a piston pump, a simulated heart, a bionic hand, a pressure sensor, and a piston-filled bellows. The simulated heart, bionic hand, and piston-filled bellows are connected sequentially through pipes to form a circulating loop containing liquid. The wrist of the bionic hand has a radial artery tube modeled after the human radial artery. The pressure sensor is used to measure the liquid pressure at the radial artery. The host computer controls the motor to work under different motion states so that the piston pump drives the simulated heartbeat, thereby driving the liquid to flow through the radial artery tube to form various different pulse waves. The host computer displays the pulse wave diagram based on the detection results of the pressure sensor for the user to refer to and compare. Thus, it can more realistically simulate various different human pulse waves and has a simple structure and is easy to use.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a pulse wave simulation teaching device. Background Technology

[0002] Pulse diagnosis in Traditional Chinese Medicine (TCM) is an important component of TCM. Its non-invasive and convenient diagnostic features give it strong competitiveness in disease diagnosis and high research value. Therefore, teaching pulse diagnosis is a crucial part of TCM education.

[0003] However, current research and development on pulse diagnosis teaching equipment is limited, and even fewer devices can simulate the complex pulse waves of the human body. Furthermore, existing pulse simulation devices primarily rely on numerous electronic components, resulting in complex structures, inconvenient operation, and high costs. To address this, the inventors of this application propose a pulse wave simulation teaching device. This device utilizes a piston pump to drive a simplified simulated heartbeat, causing liquid to circulate between the simplified simulated wrist and the simulated heart through a pipe. This creates a pulse wave on the simplified simulated wrist that students can use for pulse diagnosis. This device requires a storage tank, a return pump, and a one-way valve in the return pipeline (i.e., the liquid flow pipeline from the simplified simulated wrist to the simulated heart), making its structure complex and costly. Moreover, the structure of the simplified simulated wrist differs significantly from that of a real wrist, resulting in a substantial difference between the pulse wave felt by touching the simplified simulated wrist and that felt on a real wrist, thus affecting the effectiveness of TCM pulse diagnosis teaching. Summary of the Invention

[0004] The purpose of this application is to provide a pulse wave simulation teaching device that can more realistically simulate various human pulse waves and has a simple structure and is easy to use.

[0005] This application provides a pulse wave simulation teaching device, including a host computer, a motor, a piston pump, a simulated heart, a bionic hand, a pressure sensor, and a piston-filled bellows; the simulated heart, the bionic hand, and the piston-filled bellows are sequentially connected by pipes to form a circulating loop containing liquid.

[0006] The bionic hand has a radial artery tube in the wrist that mimics the radial artery of the human body;

[0007] The pressure sensor is used to measure the liquid pressure at the passage between the simulated heart and the bionic hand;

[0008] The motor is connected to the piston pump, the piston pump is connected to the simulated heart, and the motor is electrically connected to the host computer. The piston pump is used to drive the simulated heart to beat under the drive of the motor, thereby driving the liquid to flow pulsatingly through the pressure sensor to the bionic hand, and generating a pulse wave at the radial artery of the bionic hand.

[0009] The piston-like bellows is used to store the liquid flowing out of the bionic hand and expand when the simulated heart beats, and to transport the stored liquid back to the simulated heart under its own contraction elasticity.

[0010] The pressure sensor is electrically connected to the host computer, which is used to adjust the motion parameters of the motor to generate different pulse waves at the radial artery, and displays the pulse wave diagram based on the detection results of the pressure sensor for the user to refer to and compare.

[0011] Under the control of the host computer, a piston pump and a simulated heart work together to drive the pulsed flow of liquid, generating various pulse waves at the radial artery of the bionic hand. Utilizing the radial artery of the bionic hand allows for a more realistic simulation of the human pulse wave. Simultaneously, a pressure sensor measures the liquid pressure and displays the pulse wave graph in real time on the host computer. Users can compare the pulse wave graph with the vibration felt at their fingertips when taking a pulse at the radial artery of the bionic hand, thus deepening their understanding of the relationship between pulse intensity and blood pressure fluctuations and improving teaching effectiveness. Furthermore, by using a piston-type bellows reservoir to replace the existing reservoir tank, reflux pump, and one-way valve in pulse wave simulation teaching devices, liquid storage and reflux transportation are achieved, simplifying the system structure, making it more convenient to use, and reducing equipment costs.

[0012] Preferably, the simulated heart includes a sealed housing with an inner cavity, and a flexible membrane is disposed inside the sealed housing. The flexible membrane divides the inner cavity of the sealed housing into a first chamber and a second chamber. The piston pump is connected to the first chamber, and the inlet of the bionic hand and the outlet of the piston reservoir bellows are both connected to the second chamber.

[0013] The cyclical motion of the piston pump causes the pressure in the first chamber to change cyclically, which in turn drives the pressure in the second chamber to change cyclically through the flexible membrane, thereby promoting the pulsed flow of liquid. This simulated heart can effectively simulate heartbeats (simulating heart contraction and relaxation), and it has a simple structure and is inexpensive.

[0014] Preferably, the piston-type liquid-retaining bellows includes a bellows body with elastic contraction capability, an inlet piston check valve disposed at the inlet end of the bellows body, and an outlet piston check valve disposed at the outlet end of the bellows body. The inlet piston check valve is connected to the outlet of the bionic hand, and the outlet piston check valve is connected to the simulated heart.

[0015] When the pressure in the second chamber increases, the outlet piston check valve of the piston-storage bellows closes under the pressure difference, while the inlet piston check valve opens under the pressure difference, allowing the liquid to flow out of the second chamber, pass through the bionic hand, and enter the bellows body. When the pressure in the second chamber decreases, the outlet piston check valve of the piston-storage bellows opens under the pressure difference, while the inlet piston check valve closes under the pressure difference, allowing the liquid in the bellows body to be forced into the second chamber under the action of atmospheric pressure and the elastic contraction force of the bellows body itself. This cycle reliably achieves unidirectional liquid circulation.

[0016] Preferably, the bionic hand further includes a bionic hand mold, a reflux venous tube, a simulated radius, and a filler formed by solidification of AB liquid silicone; the radial artery tube, the reflux venous tube, the simulated radius, and the filler are all disposed in the bionic hand mold, and the filler encapsulates the radial artery tube, the reflux venous tube, and the simulated radius;

[0017] The first end of the radial artery tube serves as the inlet of the bionic hand, the second end of the radial artery tube is connected to the first end of the reflux venous tube, and the second end of the reflux venous tube serves as the outlet of the bionic hand.

[0018] Preferably, the radial artery tube is curved and its outer surface is coated with a solid lubricant, and the radial artery tube is located above the simulated radius and has a gap between it and the simulated radius.

[0019] Preferably, a flow-limiting valve is connected between the bionic hand and the piston-like liquid-retaining bellows.

[0020] Optionally, the flow limiting valve is a manual flow limiting valve.

[0021] Optionally, the flow limiting valve is an electromagnetic flow limiting valve, and the flow limiting valve is electrically connected to the host computer.

[0022] Preferably, the pressure sensor is an invasive blood pressure sensor.

[0023] Preferably, the pipe is a silicone flexible tube.

[0024] Beneficial Effects: The pulse wave simulation teaching device provided in this application, under the control of a host computer, drives the pulsed flow of liquid through a piston pump and a simulated heart, generating various different pulse waves at the radial artery of the bionic hand. Utilizing the radial artery of the bionic hand allows for a more realistic simulation of the human pulse wave. Simultaneously, a pressure sensor measures the liquid pressure and displays the pulse wave diagram in real time on the host computer. Users can compare the pulse wave diagram with the vibration felt at the fingertips when performing pulse diagnosis at the radial artery of the bionic hand, thereby deepening their understanding of the relationship between pulse intensity and blood pressure fluctuations and improving teaching effectiveness. Furthermore, by using a piston-type bellows reservoir to replace the liquid storage tank, reflux pump, and one-way valve in existing pulse wave simulation teaching devices, liquid storage and reflux transportation are achieved, simplifying the system structure, making it more convenient to use, and reducing equipment costs. Attached Figure Description

[0025] Figure 1 A schematic diagram of the pulse wave simulation teaching device provided in the embodiments of this application.

[0026] Figure 2 This is a diagram showing the device connection of the pulse wave simulation teaching device provided in an embodiment of this application.

[0027] Figure 3 This is a cross-sectional view of the wrist of the bionic hand.

[0028] Figure 4 Pulse waveform obtained by changing the motor speed.

[0029] Figure 5 Pulse waveform obtained by changing the motor rotation time.

[0030] Figure 6 Pulse waveform obtained by changing the acceleration of the motor.

[0031] Figure 7 Pulse waveform obtained to change the flow rate of the flow-limiting valve.

[0032] Figure 8 This is a schematic diagram of a motor control interface.

[0033] Labeling Explanation: 1. Host Computer; 2. Motor; 3. Piston Pump; 4. Simulated Heart; 401. Sealed Housing; 402. Flexible Membrane; 403. First Chamber; 404. Second Chamber; 5. Pipeline; 6. Bionic Hand; 601. Radial Artery Tube; 602. Return Vein Tube; 603. Bionic Hand Mold; 604. Simulated Radius; 605. Filler; 606. Solid Lubricant; 7. Flow Restrictor Valve; 8. Piston Reservoir Bellows; 801. Bellows Body; 802. Inlet Piston Check Valve; 803. Outlet Piston Check Valve; 804. Feed Port; 9. Pressure Sensor. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Please refer to Figure 1 , Figure 2 A pulse wave simulation teaching device in some embodiments of this application includes a host computer 1, a motor 2, a piston pump 3, a simulated heart 4, a bionic hand 6, a pressure sensor 9, and a piston-filled bellows 8; the simulated heart 4, the bionic hand 6, and the piston-filled bellows 8 are connected in sequence through a pipe 5 to form a circulating loop containing liquid.

[0037] The bionic hand 6 has a radial artery tube 601 inside the wrist, which is modeled after the human radial artery;

[0038] Pressure sensor 9 is used to measure the liquid pressure at the pipe 5 between the simulated heart 4 and the bionic hand 6;

[0039] Motor 2 is connected to piston pump 3, piston pump 3 is connected to simulated heart 4, motor 2 is electrically connected to host computer 1, piston pump 3 is used to drive simulated heart 4 to beat under the drive of motor 2, thereby driving liquid to flow through pressure sensor 9 to bionic hand 6 in a pulsating manner, and generating pulse wave at radial artery tube 601 of bionic hand 6.

[0040] The piston-type liquid-storing bellows 8 is used to store the liquid flowing out of the bionic hand 6 when the simulated heart 4 is beating, and expands to transport the stored liquid back to the simulated heart 4 under its own contraction elastic force.

[0041] The pressure sensor 9 is electrically connected to the host computer 1. The host computer 1 is used to adjust the motion parameters of the motor 2 to generate different pulse waves at the radial artery tube 601, and displays the pulse wave diagram based on the detection results of the pressure sensor 9 for the user to refer to and compare.

[0042] Under the control of the host computer 1, the piston pump 3 and the simulated heart 4 work together to drive the liquid to flow in a pulsed manner, which can generate a variety of different pulse waves at the radial artery tube 601 of the bionic hand 6. The radial artery tube 601 of the bionic hand 6 can make the pulse waves more realistically simulate the human pulse wave. At the same time, the pressure sensor 9 measures the liquid pressure and displays the pulse wave diagram in real time at the host computer 1. When the user performs pulse diagnosis at the radial artery tube 601 of the bionic hand 6, he / she can compare the pulse wave diagram with the vibration felt by the fingertip, thereby deepening the understanding of the relationship between pulse intensity and blood pressure fluctuations and improving the teaching effect. In addition, the piston-type liquid storage bellows tube 8 replaces the liquid storage tank, reflux pump and one-way valve in the existing pulse wave simulation teaching device to realize the storage and reflux transportation of liquid, simplifying the system structure, making it more convenient to use and reducing equipment costs.

[0043] Specifically, see Figure 2 The simulated heart 4 includes a sealed housing 401 with an inner cavity. A flexible membrane 402 is disposed inside the sealed housing 401, dividing the inner cavity of the sealed housing 401 into a first chamber 403 and a second chamber 404. A piston pump 3 is connected to the first chamber 403, and the inlet of the bionic hand 6 and the outlet of the piston-storage bellows pipe 8 are both connected to the second chamber 404. Through the cyclical movement of the piston pump 3, the pressure in the first chamber 403 can be cyclically changed, thereby driving the pressure cyclical change in the second chamber 404 through the flexible membrane 402, thus promoting the pulsed flow of liquid. This simulated heart 4 can effectively simulate heartbeats (simulating heart contraction and relaxation), and has a simple structure and low cost.

[0044] Specifically, when the piston pump 3 is working, it drives the liquid or gaseous medium to enter and exit the first chamber 403. When the liquid or gaseous medium enters the first chamber 403, it squeezes the flexible membrane 402, thereby increasing the pressure in the second chamber 404 and pushing the liquid in the second chamber 404 to flow out through the pressure sensor 9. When the liquid or gaseous medium is drawn out of the first chamber 403, a negative pressure is formed in the first chamber 403, which reduces the pressure in the second chamber 404. At this time, with the assistance of the piston reservoir bellows 8, the liquid will flow into the second chamber 404. This cycle is repeated to form a pulsating circulating liquid flow.

[0045] Specifically, see Figure 2 The piston-storage bellows 8 includes a bellows body 801 with elastic contraction capability, an inlet piston check valve 802 disposed at the inlet end of the bellows body 801, and an outlet piston check valve 803 disposed at the outlet end of the bellows body 801. The inlet piston check valve 802 is connected to the outlet of the bionic hand 6, and the outlet piston check valve 803 is connected to the simulated heart 4 (specifically, connected to the second chamber 404 of the simulated heart 4).

[0046] When the pressure in the second chamber 404 increases, the outlet piston check valve 803 of the piston-storage bellows 8 closes under the action of the pressure difference, and the inlet piston check valve 802 opens under the action of the pressure difference, so that the liquid can flow out of the second chamber 404 and pass through the bionic hand 6 and enter the bellows body 801. When the pressure in the second chamber 404 decreases, the outlet piston check valve 803 of the piston-storage bellows 8 opens under the action of the pressure difference, and the inlet piston check valve 802 closes under the action of the pressure difference, so that the liquid in the bellows body 801 is squeezed into the second chamber 404 under the action of atmospheric pressure and the elastic contraction force of the bellows body 801 itself; thus, the cycle is repeated, and the one-way circulation of liquid is reliably realized.

[0047] In some embodiments, the piston reservoir bellows 8 also includes a feed port 804, which has an openable cap. Solvents and solutes can be added to the interior of the piston reservoir bellows 8 through the feed port 804 to adjust the liquid concentration to simulate different concentrations of blood.

[0048] Preferably, see Figure 2 , Figure 3 The bionic hand 6 also includes a bionic hand mold 603, a venous return tube 602, a simulated radius 604, and a filler 605 solidified from AB liquid silicone. The radial artery tube 601, the venous return tube 602, the simulated radius 604, and the filler 605 are all disposed in the bionic hand mold 603, and the filler 605 encloses the radial artery tube 601, the venous return tube 602, and the simulated radius 604.

[0049] The first end of the radial artery tube 601 serves as the inlet of the bionic hand 6, and the second end of the radial artery tube 601 is connected to the first end of the reflux vein tube 602, with the second end of the reflux vein tube 602 serving as the outlet of the bionic hand 6.

[0050] Among them, the shape of the bionic hand mold 603 is set with reference to the human hand (e.g. Figure 2 As shown in the diagram, the radial artery tube 601 is positioned to match the location of the radial artery in the human wrist, facilitating accurate pulse diagnosis for training users. In this bionic hand 6, when liquid flows through the radial artery tube 601, it simulates the lateral displacement of the blood vessel caused by a human pulse (because the AB liquid silicone filler 605 has elasticity similar to human soft tissue, it can cause a certain lateral displacement of the radial artery tube 601 when the liquid pulsates), thus more realistically simulating the human pulse wave and improving teaching effectiveness. Both the radial artery tube 601 and the reflux vein tube 602 are engineered blood vessels to further enhance the realism of the pulse wave simulation. The radial artery tube 601 and the reflux vein tube 602 can be two interconnected engineered blood vessels or two parts of a single engineered blood vessel.

[0051] Furthermore, see Figure 3 The radial artery tube 601 is curved and its outer surface is coated with a solid lubricant 606. The radial artery tube 601 is located above the simulated radius 604 and has a gap between it and the simulated radius 604. The bending and extension pattern of the radial artery tube 601 mimics the actual bending and extension pattern of the human radial artery at the wrist. This allows the radial artery tube 601 to produce more significant lateral displacement and a certain displacement along its extension direction, thus more realistically simulating the vibration of human blood vessels under the influence of blood flow.

[0052] Furthermore, the outer surface of the venous return tube 602 is not coated with solid lubricant 606, so that the vibration at the venous return tube 602 is less noticeable, avoiding the user being able to feel obvious pulse vibration when touching the venous return tube 602, thereby better training the user to accurately locate the pulse position.

[0053] The simulated radius 604 can be made of rigid plastic, but is not limited to this.

[0054] In some embodiments, both the first end of the radial artery tube 601 and the second end of the reflux venous tube 602 are provided with connectors (not shown in the figure), that is, both the inlet and outlet of the bionic hand 6 are provided with connectors, which are used to connect to the tube 5. This allows for the replacement of bionic hands 6 of different sizes to simulate the pulse waves of humans of different body types.

[0055] In some preferred embodiments, see Figure 1 , Figure 2 A flow-limiting valve 7 is connected between the bionic hand 6 and the piston-like liquid-retaining bellows 8. By adjusting the opening of the flow-limiting valve 7, different resistances can be generated to the liquid, thereby causing the liquid to form different tidal waves and diurnal waves under different resistances, further improving the realism and diversity of the simulation of human pulse waves.

[0056] Among them, the flow limiting valve 7 can be a manual flow limiting valve (such as...) Figure 2 The flow limiting valve 7 in the middle can be a manual flow limiting valve or an electromagnetic flow limiting valve, which can be selected according to actual needs. When the flow limiting valve 7 is an electromagnetic flow limiting valve, the flow limiting valve 7 is electrically connected to the host computer 1, so that the host computer 1 can control its automatic opening adjustment.

[0057] The pressure sensor 9 can be selected according to actual needs. Preferably, the pressure sensor 9 is an invasive blood pressure sensor, so that the measurement results are more accurate.

[0058] Preferably, the pipe 5 is a silicone flexible tube to better simulate human blood vessels and make the simulation of human pulse waves more realistic. Preferably, the pipe 5 can be detachably connected to each device, thereby facilitating the replacement of pipes 5 of different specifications to simulate blood vessels of different sizes, further improving the realism and diversity of the simulation of human pulse waves. The dimensions of each section of pipe 5 can be set according to actual needs, and the diameter of each section of pipe 5 can be the same or different.

[0059] When using this pulse wave simulation teaching device, the main factors affecting the pulse wave waveform it generates include:

[0060] The rotation angle of motor 2 corresponds to the volume of fluid ejected in each stroke of the circulatory system;

[0061] Acceleration of motor 2: When motor 2 generates a standard pulse wave at a certain speed, the magnitude and duration of the acceleration will affect the waveform, mainly affecting the generation of tidal waves;

[0062] The vascular dimensions of radial artery tube 601 and reflux vein tube 602: The inner diameter, wall thickness, and elasticity of radial artery tube 601 and reflux vein tube 602 are related to the shape of the pulse wave and the external perception of the pulse;

[0063] Resistance of flow limiting valve 7: Adjusting the opening of flow limiting valve 7 can produce different resistances, and the tidal wave and diphtheria wave will change to some extent under different resistances.

[0064] Liquid concentration: Different liquid concentrations can affect the smoothness of liquid flow, which in turn affects the pulse waveform.

[0065] By controlling the above variables, a variety of stable standard pulse waves can be generated in the pulse wave simulation teaching device to simulate the occurrence of pulse in traditional Chinese medicine and realize pulse diagnosis teaching. Among them, motor 2 can be controlled and adjusted by the host computer 1. If the flow limiting valve 7 is an electromagnetic flow limiting valve, it can also be controlled and adjusted by the host computer 1. The blood vessel sizes of radial artery tube 601 and reflux vein tube 602 can be adjusted by replacing the bionic hand 6. The liquid concentration can be adjusted by adjusting the ratio of solute to solvent.

[0066] Figure 4 The image shows the pulse waveform obtained by changing the speed of motor 2. Figure 5 The image shows a pulse waveform obtained by changing the rotation time of motor 2. Figure 6 The image shows a pulse waveform obtained by changing the acceleration of motor 2. Figure 7 The pulse waveform obtained by changing the flow rate of the flow restrictor is shown. Figure 8A schematic diagram of a motor control interface is shown, through which the motor 2 can be adjusted in the host computer 1 (e.g., adjusting the time, angle, speed and acceleration of the motor 2 in the forward and reverse directions, as well as adjusting the number of rotations of the motor 2 (i.e., the number of revolutions); but not limited to this).

[0067] In some embodiments, the pulse wave simulation teaching device also includes a CAN (Controller Area Network) analyzer and a CAN bus. The CAN analyzer is electrically connected to the host computer 1, and the motor 2, pressure sensor 9, and electromagnetic flow limiting valve are all connected to the CAN analyzer via the CAN bus.

[0068] In summary, this pulse wave simulation teaching device can generate different types of pulse waves in a simple setup by controlling the periodic operation of motor 2. Compared with existing devices, the advantages of this invention are: simple device, convenient operation, simple control method, ability to simulate the generation of pulse waves under heartbeat, and the special design of the bionic hand 6 can present a more realistic pulse beat; different types of pulse waves can be generated by changing the periodic movement mode of motor 2, liquid concentration, opening degree of flow limiting valve 7, and specifications of radial artery tube 601 and reflux vein tube 602, and the pulse wave waveform can be intuitively presented through an invasive blood pressure sensor, realizing pulse wave simulation teaching.

[0069] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A pulse wave simulation teaching device, characterized in that, It includes a host computer (1), a motor (2), a piston pump (3), a simulated heart (4), a bionic hand (6), a pressure sensor (9), and a piston-filled bellows (8); the simulated heart (4), the bionic hand (6), and the piston-filled bellows (8) are connected in sequence through a pipe (5) to form a circulating loop containing liquid; The bionic hand (6) has a radial artery tube (601) in the wrist that mimics the radial artery of the human body. The pressure sensor (9) is used to measure the liquid pressure at the pipe (5) between the simulated heart (4) and the bionic hand (6); The motor (2) is connected to the piston pump (3), the piston pump (3) is connected to the simulated heart (4), the motor (2) is electrically connected to the host computer (1), and the piston pump (3) is used to drive the simulated heart (4) to beat under the drive of the motor (2), thereby driving the liquid to flow pulsatingly through the pressure sensor (9) to the bionic hand (6), and generating a pulse wave at the radial artery (601) of the bionic hand (6); The piston-like bellows (8) is used to store the liquid flowing out of the bionic hand (6) when the simulated heart (4) beats, and expand to transport the stored liquid back to the simulated heart (4) under its own contraction elastic force. The pressure sensor (9) is electrically connected to the host computer (1). The host computer (1) is used to adjust the motion parameters of the motor (2) to generate different pulse waves at the radial artery tube (601), and displays the pulse wave diagram according to the detection results of the pressure sensor (9) for the user to refer to and compare.

2. The pulse wave simulation teaching device according to claim 1, characterized in that, The simulated heart (4) includes a sealed housing (401) with an inner cavity. A flexible membrane (402) is provided inside the sealed housing (401). The flexible membrane (402) divides the inner cavity of the sealed housing (401) into a first chamber (403) and a second chamber (404). The piston pump (3) is connected to the first chamber (403). The inlet of the bionic hand (6) and the outlet of the piston reservoir bellows (8) are both connected to the second chamber (404).

3. The pulse wave simulation teaching device according to claim 1, characterized in that, The piston-storage bellows (8) includes a bellows body (801) with elastic contraction capability, an inlet piston check valve (802) disposed at the inlet end of the bellows body (801), and an outlet piston check valve (803) disposed at the outlet end of the bellows body (801). The inlet piston check valve (802) is connected to the outlet of the bionic hand (6), and the outlet piston check valve (803) is connected to the simulated heart (4).

4. The pulse wave simulation teaching device according to claim 1, characterized in that, The bionic hand (6) further includes a bionic hand mold (603), a venous return tube (602), a simulated radius (604), and a filler (605) solidified from AB liquid silicone. The radial artery tube (601), the venous return tube (602), the simulated radius (604), and the filler (605) are all disposed in the bionic hand mold (603), and the filler (605) encloses the radial artery tube (601), the venous return tube (602), and the simulated radius (604). The first end of the radial artery tube (601) serves as the inlet of the bionic hand (6), the second end of the radial artery tube (601) is connected to the first end of the reflux venous tube (602), and the second end of the reflux venous tube (602) serves as the outlet of the bionic hand (6).

5. The pulse wave simulation teaching device according to claim 4, characterized in that, The radial artery tube (601) is curved and its outer surface is coated with a solid lubricant (606). The radial artery tube (601) is located above the simulated radius (604) and has a gap between it and the simulated radius (604).

6. The pulse wave simulation teaching device according to claim 1, characterized in that, A flow-limiting valve (7) is connected between the bionic hand (6) and the piston reservoir bellows (8).

7. The pulse wave simulation teaching device according to claim 6, characterized in that, The flow limiting valve (7) is a manual flow limiting valve.

8. The pulse wave simulation teaching device according to claim 6, characterized in that, The flow limiting valve (7) is an electromagnetic flow limiting valve, and the flow limiting valve is electrically connected to the host computer (1).

9. The pulse wave simulation teaching device according to claim 1, characterized in that, The pressure sensor (9) is an invasive blood pressure sensor.

10. The pulse wave simulation teaching device according to claim 1, characterized in that, The pipe (5) is a silicone hose.

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