A dynamic tracing device for an oscillography electronic sphygmomanometer

Abstract

The present application relates to a kind of oscillograph electronic sphygmomanometer dynamic tracing device, including blood analog liquid tank, bionic simulation device;Bionic simulation device includes blood pump, constant-temperature blood analog tank, simulation heart, stepper motor, imitated aorta, imitated radial artery;Blood pump suction end is inserted into blood analog liquid tank, output end is connected with constant-temperature blood analog tank;Constant-temperature blood analog tank is connected with simulation heart;Simulation heart is a piston cavity, the opening end of piston cavity is connected with stepper motor, stepper motor can stepwise control the progress of piston, the closed end of piston cavity is connected with imitated aorta, imitated aorta is connected with imitated radial artery;The first flow regulating valve is arranged at the front end of imitated radial artery, and extend to blood analog liquid tank;Dynamic pressure sensor is arranged in imitated aorta and imitated radial artery.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of oscillographic electronic sphygmomanometer dynamic traceability device, belong to metrological equipment calibration technical field. BACKGROUND

[0002] Oscillographic electronic sphygmomanometer is easy to operate, not influenced by human factors, and relatively good repeatability, has been more and more widely used.However, there are bottlenecks for years for dynamic detection ability verification of oscillographic electronic sphygmomanometer.Currently, non-invasive blood pressure simulator is used by metrological technology agency to detect the accuracy of electronic sphygmomanometer, but the envelope line set in the simulator is also based on statistical empirical value, which can only realize the repeatability measurement of electronic sphygmomanometer, and cannot realize the value traceability of blood pressure dynamic measurement accuracy. SUMMARY

[0003] The purpose of the present application is to provide a kind of oscillographic electronic sphygmomanometer dynamic traceability device based on real human body artery, skeleton, blood and other bionic parameters according to the actual situation of oscillographic electronic sphygmomanometer dynamic detection, which includes bionic arm model of upper limb arterial system such as brachial artery, ulnar artery and radial artery, and has ascending aortic and carotid artery branch function, is closer to real blood pressure system, and uses physiological saline and glycerol mixed liquid to prepare bionic blood, controls the cardiac cycle and each beat output of simulated heart by stepping motor, realizes the temperature of bionic blood close to human body temperature by using constant temperature device, simulates peripheral vascular resistance by using vascular flow regulating valve, and implants micro dynamic pressure sensor in the blood vessel at the sleeve detection position to read the systolic pressure and diastolic pressure of internal bionic blood, to realize the accuracy dynamic measurement of oscillographic electronic sphygmomanometer.

[0004] The present application adopts the following technical solutions:

[0005] An oscillographic electronic sphygmomanometer dynamic traceability device includes bionic blood liquid tank 1 and bionic simulation device; the bionic simulation device includes blood pump 11, constant temperature bionic blood tank 9, simulated heart 10, stepping motor 12, simulated aorta 8 and simulated ulnar and radial artery 4; the suction end of the blood pump 11 extends into the bionic blood liquid tank 1, and the output end is connected with the constant temperature bionic blood tank 9; the constant temperature bionic blood tank 9 is connected with the simulated heart 10; the simulated heart 10 is a piston cavity, the open end of the piston cavity is connected with the stepping motor 12, the stepping motor 12 can stepwise control the progress of the piston, the closed end of the piston cavity is connected with the simulated aorta 8, and the simulated aorta 8 is connected with the simulated ulnar and radial artery 4; the first flow regulating valve 2 is arranged at the front end of the simulated ulnar and radial artery 4, and extends to the bionic blood liquid tank 1; the dynamic pressure sensor 5 is arranged in the simulated aorta 8 and the simulated ulnar and radial artery 4.

[0006] Preferably, the simulation arm skeleton 3 is provided with a hinge part, and the connection part of the artificial aorta 8 and the artificial radial artery 4 corresponds to the hinge part.

[0007] Preferably, the artificial aorta 8 is provided with artificial branch arteries, including ascending aorta, aortic arch, brachiocephalic artery, carotid artery, right subclavian artery and brachial artery, and each branch artery is provided with a corresponding one-way valve for preventing blood backflow.

[0008] Further, the simulation arm skeleton 3 is made of metal material, and the overall mass and rigidity of the simulation arm skeleton 3 are close to those of a normal human arm.

[0009] Further, the lower arm of the simulation arm skeleton 3 is in a horizontal state, and the upper arm and the lower arm form an angle of 20-30°, and the upper arm and the lower arm are hinged and the angle between the upper arm and the lower arm can be adjusted.

[0010] Preferably, the stepping motor 12 is controlled by a computer, and the maximum stroke of the piston and the pushing frequency are set in advance.

[0011] Further, the artificial blood is prepared by physiological saline and glycerin, the liquid in the artificial blood liquid tank 1 is sent to the top constant-temperature artificial blood tank 9 by the blood supply pump 11, the constant-temperature artificial blood tank 9 keeps the liquid in a temperature range of 36.5±1°, when the piston goes down, the blood enters the simulation heart 10 through the channel provided with the one-way valve, when the piston goes up, the blood enters the ascending aorta, part of the blood enters the aortic arch and the carotid artery, and finally flows back to the constant-temperature artificial blood tank 9 through the second flow regulating valve, most of the blood enters the brachial artery, is branched at the elbow joint to the ulnar artery and the radial artery, and finally flows back to the artificial blood liquid tank 1 through the first flow regulating valves 2 of the ulnar artery and the radial artery.

[0012] Preferably, the artificial blood is prepared by physiological saline and glycerin.

[0013] Further, the actual values of the systolic pressure and the diastolic pressure of the brachial artery are read by the implanted dynamic pressure sensor, the average values of the systolic pressure and the diastolic pressure in several cycles after the system is stabilized are taken as standard values, and error comparison is made between the average values of the results detected several times by the blood pressure meter to be checked.

[0014] The present application has the following beneficial effects:

[0015] 1) A relatively perfect upper limb arterial blood vessel system is established, the length, diameter, elastic modulus, thickness and other parameters of the system can be close to the physiological parameters of the human body, the artificial aorta is used, the artificial blood is prepared by physiological saline and glycerin, the density and other physical parameters of the artificial blood are close to those of the real blood, and the overall device presents the characteristics close to the normal human physiological system, so that the device better meets the working condition of detecting the brachial artery blood pressure of the real human body by the blood pressure meter.

[0016] 2) The actual values of brachial artery systolic and diastolic pressure are read by the implanted dynamic pressure sensor, and the average values of systolic and diastolic pressure in several cycles after the system is stabilized are used as standard values, and the error comparison between the average values of several results detected by the sphygmomanometer and the standard values is made, which conforms to the measurement method of the sphygmomanometer for the real human body and the evaluation of the internal brachial artery blood pressure of the human body by the sphygmomanometer value, and can directly obtain the actual brachial artery blood pressure value at the detection position of the cuff, so as to realize the direct dynamic traceability of the sphygmomanometer.

[0017] 3) The flow regulating valve and the simulated heart model are innovatively developed, the peripheral resistance of the arterial system can be changed by adjusting the value of the flow regulating valve, and the control and simulation of single variables such as hyperlipidemia and heartbeat speed can be realized by adjusting parameters such as blood viscosity, cardiac output and heartbeat frequency, the experimental research on the influence of single factor which cannot be completed in medical clinical trials can be solved, the single influence degree and trend of factors such as blood vessel aperture, blood vessel hardness, blood viscosity, blood density, heartbeat frequency, cardiac output and vascular peripheral resistance on human blood pressure can be carried out, and reliable research foundation guarantee is provided for precision medicine, which has high medical research value.

[0018] 4) In addition, through the simulation of human blood pressure by the device and the dynamic traceability of the electronic sphygmomanometer, rich experimental data can be provided for the further improvement of the electronic sphygmomanometer in the non-invasive measurement of human blood pressure. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the oscillographic electronic sphygmomanometer dynamic traceability device.

[0020] Figure 2 is an effect drawing of the structure of the oscillographic electronic sphygmomanometer dynamic traceability device from another perspective.

[0021] Figure 3 is a corresponding effect schematic view. Figure 2

[0022] In the figure, 1. blood simulation liquid tank, 2. first flow regulating valve, 3. simulated arm skeleton, 4. ulnar artery, radial artery (with one-way valve), 5. dynamic pressure sensor, 6. brachial artery (with one-way valve), 7. ascending aorta (with one-way valve), 8. aortic arch, brachiocephalic artery, carotid artery (all with one-way valve), 9. warm blood simulation tank, 10. simulated heart, 11. blood supply pump, 12. cuff, 13. measured sphygmomanometer. DETAILED DESCRIPTION

[0023] The application will be further described below in combination with the drawings and specific embodiments.

[0024] Figure 1 and 2 ​This is a schematic diagram of the principle of the oscillometric blood pressure monitor dynamic traceability device of the present invention from two different perspectives. Figure 3 Is with Figure 2 The corresponding rendering image, and Figure 2 Viewing them together provides a clearer picture of the device's structure. Based on the upper limb vascular system, it utilizes the major vessels of a relatively complete upper limb arterial system, including the ascending aorta, aortic arch, brachiocephalic artery, carotid artery, right subclavian artery, brachial artery, ulnar artery, and radial artery. All arterial branches are equipped with one-way valves to prevent blood backflow.

[0025] Figure 1 Number 3 represents the upper and lower arm skeleton of the simulated arm. It is made of appropriate metal materials to ensure sufficient strength to ensure the positional stability of the simulated arm, its muscle tissue and blood vessels, while also making its overall mass and stiffness close to the parameters of a normal human arm.

[0026] The simulated arm has its forearm horizontal, with an angle of approximately (20-30)° between the upper and lower arms. This is to maintain consistency with the blood pressure monitor's measurement position. The upper and lower arms are hinged, allowing for adjustment of their angle. The aortic arch and carotid artery branches are preserved to allow for blood diversion and prevent a sharp increase in blood pressure at the brachial artery when the cuff completely blocks it. This design better reflects human physiology and real-world blood pressure monitor measurements.

[0027] like Figures 1-2 As shown, the simulated heart 10 is a piston chamber controlled by a stepper motor 12 at the bottom. The stepper motor 12 is computer-controlled, allowing for preset settings of the piston's maximum stroke and pushing frequency. The bionic blood is prepared from saline and glycerin. Blood from the bionic blood tank 1 is pumped by a blood supply pump 11 to a temperature-controlled bionic blood tank 9 at the top. The temperature-controlled bionic blood tank 9 maintains the bionic blood at a temperature within the range of (36.5±1)°C (normal human blood temperature is approximately 36.5°C). When the piston moves downwards, the blood enters the simulated heart 10 through a channel equipped with a one-way valve and flows into the ascending aorta. Some blood enters the aortic arch and carotid aorta, and after passing through a second flow regulating valve 13, finally flows back to the temperature-controlled tank. Most of the blood enters the brachial artery, where it is diverted at the elbow joint to the ulnar and radial arteries, and after passing through the first flow regulating valves 2 of the ulnar and radial arteries, finally flows back to the bionic blood tank 1.

[0028] The oscillometric electronic blood pressure monitor dynamic traceability device of this invention has three main innovations:

[0029] First, a relatively complete upper limb arterial blood vessel system is established, the length, diameter, elastic modulus, thickness and other parameters of which are close to physiological parameters of human body, bionic muscle tissue and bionic skin are used, and bionic blood is prepared by using physiological saline and glycerol, which is close to real blood in density and other physical parameters, and the overall device presents characteristics close to normal human physiological system, better meeting the working condition of sphygmomanometer detecting brachial artery blood pressure of real human body;

[0030] Second, the actual values of brachial artery systolic pressure and diastolic pressure are read by the implanted dynamic pressure sensor, the average values of the systolic pressure and diastolic pressure in several cycles after the system is stabilized are taken as standard values, and error comparison is made between the average values of several results detected by the sphygmomanometer, which meets the measurement method of the sphygmomanometer for detecting real human body and judging the internal brachial artery blood pressure of human body through the sphygmomanometer value, and the actual brachial artery blood pressure value at the detection place of the cuff is directly obtained, realizing direct dynamic traceability of the sphygmomanometer;

[0031] Third, the first and second flow regulating valves 2 and 13 and the model of the simulated heart 10 can change the peripheral resistance of the arterial system by adjusting the valve value, and can realize the control and simulation of single variable such as hyperlipidemia and heart rate by adjusting the blood viscosity, cardiac output and heart beat frequency and other parameters, solve the experimental research of single factor influence which cannot be completed by medical clinical test, can carry out the single influence degree and trend of factors such as blood vessel aperture, blood vessel hardness, blood viscosity, blood density, heart rate, cardiac output, peripheral resistance of blood vessel on human blood pressure, provide reliable research foundation guarantee for precision medicine, and have high medical research value. In addition, through the simulation of human blood pressure by the device and the dynamic traceability of the electronic sphygmomanometer, rich experimental data can be provided for the further improvement of the electronic sphygmomanometer in non-invasive measurement of human blood pressure, and strong technical support can be provided for the research and development of new high-end medical diagnostic equipment.

[0032] The above is the preferred embodiment of the present application, and various transformations or improvements can be made by those skilled in the art on the basis of the above, without departing from the general concept of the present application, and these transformations or improvements should belong to the scope of the present application.

Claims

1. A dynamic traceability device for an oscillometric electronic blood pressure monitor, characterized in that: Includes a blood-like liquid tank (1) and a biomimetic simulation device; The biomimetic simulation device includes a blood supply pump (11), a constant temperature blood tank (9), a simulated heart (10), a stepper motor (12), a simulated aorta (8), and a simulated radial and ulnar arteries (4); The suction end of the blood supply pump (11) extends into the simulated blood liquid tank (1), and the output end is connected to the constant temperature simulated blood box (9). A constant temperature blood-simulating box (9) is connected to a simulated heart (10); the simulated heart (10) is a piston cavity, the open end of the piston cavity is connected to the stepper motor (12), the stepper motor (12) can control the piston's progress in steps, the closed end of the piston cavity is connected to the simulated aorta (8), and the simulated aorta (8) is connected to the simulated radial and ulnar arteries (4); The simulated radial and ulnar artery (4) is provided with a first flow regulating valve (2) at its front end, and extends to the simulated blood liquid tank (1); Both the simulated aorta (8) and the simulated radial and ulnar arteries (4) have built-in dynamic pressure sensors (5); It also includes a simulated arm skeleton (3) having a hinge, the connection point of the simulated aorta (8) and the simulated radial and ulnar arteries (4) corresponding to the hinge; The simulated aorta (8) includes simulated branch arteries: ascending aorta, aortic arch, brachiocephalic artery, carotid artery, right subclavian artery, and brachial artery; each branch artery is equipped with a corresponding one-way valve to prevent blood backflow. The actual values ​​of brachial artery systolic and diastolic blood pressure are read by the implanted dynamic pressure sensor (5). The average value of systolic and diastolic blood pressure over several cycles after the system stabilizes is used as the standard value, and the error is compared with the average value of several results detected by the blood pressure monitor to be calibrated.

2. The oscillometric electronic blood pressure monitor dynamic traceability device as described in claim 1, characterized in that: The simulated arm skeleton (3) is made of metal, and its overall mass and rigidity are close to those of a normal human arm.

3. The oscillometric electronic blood pressure monitor dynamic traceability device as described in claim 2, characterized in that: The lower arm of the simulated arm skeleton (3) is in a horizontal position, and there is an angle of 20-30° between the upper arm and the lower arm; the upper and lower arms are hinged together, and the angle between them can be adjusted.

4. The oscillometric electronic blood pressure monitor dynamic traceability device as described in claim 1, characterized in that: The stepper motor (12) is controlled by a computer, with the maximum piston stroke and pushing frequency preset in advance.

5. The oscillometric electronic blood pressure monitor dynamic traceability device as described in claim 1, characterized in that: The biomimetic blood is prepared with physiological saline and glycerin. The liquid in the biomimetic blood liquid tank (1) is delivered to the constant temperature biomimetic blood tank (9) at the top by the blood supply pump (11). The constant temperature biomimetic blood tank (9) keeps the liquid in a temperature range of (36.5±1)°. When the piston moves down, the blood enters the simulated heart (10) through the channel equipped with a one-way valve. When the piston moves up, it rushes into the ascending aorta. Some of the blood enters the aortic arch and carotid aorta and flows back to the constant temperature biomimetic blood tank (9) through the second flow regulating valve (13). Most of the blood enters the brachial artery and is diverted to the ulnar and radial arteries at the elbow joint. It flows back to the biomimetic blood liquid tank (1) through the first flow regulating valve (2) of the ulnar and radial arteries.

6. The oscillometric electronic blood pressure monitor dynamic traceability device as described in claim 1, characterized in that: Bionic blood made from physiological saline and glycerin.

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