Blood pressure air valve stepwise deflation method, device, sphygmomanometer and storage medium

Abstract

The embodiments of the present application disclose a stepped air release method, device, sphygmomanometer and storage medium for blood pressure. The method includes: determining a target pressure drop value according to a first pressure step and a preset stepped air release rule; releasing air from the airbag according to the target pressure drop value to obtain a second pressure step after air release; when the second pressure step is greater than or equal to a second preset threshold, using the second pressure step as the first pressure step and returning to execute the step of determining the target pressure drop value according to the first pressure step and the preset stepped air release rule; and when the second pressure step is less than the second preset threshold, ending the air release. This method determines the target pressure drop value for each air release by judging whether a pulse wave can be detected using the current pressure step, establishing a preset stepped air release rule, and does not require medical staff to release air based on experience, thus avoiding the problem of poor accuracy of the measured blood pressure value caused by medical staff releasing air based on experience.

Description

Technical Field

[0001] The present invention relates to the technical field of medical electronic devices, and in particular to a stepped air release method and device for a blood pressure air valve, a sphygmomanometer, and a storage medium.

Background Art

[0002] Most of the current electronic sphygmomanometers on the market adopt the oscillometric method. In this method, an air inflation pump is used to pressurize the cuff pressure above the systolic pressure, and then stepped air release is performed by opening and closing the air valve. At each step, the pressure and the pulse wave amplitude at this step are obtained through a pressure sensor. After the air release is completed, a pressure sequence and a corresponding pulse wave amplitude sequence are obtained. An envelope curve of the pulse wave is constructed through these two sequences. The pressure corresponding to the maximum amplitude of the envelope curve is the mean pressure. The systolic amplitude and the diastolic amplitude are obtained by multiplying the maximum amplitude of the curve by corresponding empirical coefficients, and the corresponding pressures are the systolic pressure and the diastolic pressure.

[0003] For the electronic sphygmomanometer using the oscillometric method, since the air release during the measurement process is stepped pressure release, the magnitude of the pressure released each time will affect the accuracy of the measurement result. At present, there is no criterion for stepped air release pressure release, and medical staff need to rely on experience to judge the magnitude of the released pressure, resulting in poor accuracy of the measured blood pressure value.

Summary of the Invention

[0004] In view of this, the present invention provides a stepped air release method and device for a blood pressure air valve, a sphygmomanometer, and a storage medium to improve the accuracy of the measured pressure value.

[0005] The specific technical solution of the first embodiment of the present invention is as follows:

[0006] A method for stepped deflation of a blood pressure air valve, the method comprising: after a blood pressure detection component of a sphygmomanometer detects an effective pulse wave, deflating the airbag of the sphygmomanometer according to a first preset threshold to obtain a first pressure step after deflation; the effective pulse wave is a pulse wave with a frequency within a preset range; the pressure step is the pressure value of the cuff of the sphygmomanometer; determining a target pressure drop value according to the first pressure step and a preset stepped deflation rule; deflating the airbag according to the target pressure drop value to obtain a second pressure step after deflation; when the second pressure step is greater than or equal to a second preset threshold, taking the second pressure step as the first pressure step, and returning to execute the step of determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule; when the second pressure step is less than the second preset threshold, ending the deflation; the preset stepped deflation rule includes: when the blood pressure detection component can search for a pulse wave using the first pressure step, obtaining the target pressure drop value according to whether the pulse wave currently searched by the blood pressure detection component is an effective pulse wave; when the blood pressure detection component fails to search for a pulse wave using the first pressure step, obtaining the pressure drop value during the previous deflation of the airbag, and obtaining the target pressure drop value according to the pressure drop value during the previous deflation, and the pressure drop value during the previous deflation and the target pressure drop value are in a first linear relationship.

[0007] Preferably, the obtaining the target pressure drop value according to whether the pulse wave currently searched by the blood pressure detection component is an effective pulse wave includes: determining whether the pulse wave currently searched by the blood pressure detection component is an effective pulse wave; when the searched pulse wave is an effective pulse wave, determining the target pressure drop value as a first preset value; when the searched pulse wave is not an effective pulse wave, obtaining a first search time when the blood pressure detection component searches for a pulse wave using the first pressure step, and obtaining the target pressure drop value according to the first search time, and the first search time and the target pressure drop value are in a second linear relationship.

[0008] Preferably, after determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule, it further includes: determining whether the target pressure drop value is greater than a second preset value; when the target pressure drop value is greater than the second preset value, taking the second preset value as the updated target pressure drop value; when the target pressure drop value is less than or equal to the second preset value, determining not to update the target pressure drop value.

[0009] Preferably, deflating the airbag according to the target pressure drop value to obtain a second pressure step after deflation, includes: obtaining the valve opening time according to the target pressure drop value and the initial air valve deflation model; controlling the air valve of the sphygmomanometer to open for deflation according to the valve opening time, closing the air valve when the valve opening time is reached, and detecting the second pressure step after the air valve is closed.

[0010] Preferably, obtaining the valve opening time according to the target pressure drop value and the initial air valve deflation model, includes: if it is the second deflation, obtaining the valve opening time corresponding to the second deflation according to the target pressure drop value and the initial air valve deflation model; if it is the nth deflation, optimizing the air valve deflation model used in the (n - 1)th deflation according to the first pressure step and the second pressure step corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model, where n is an integer greater than 2; obtaining the valve opening time corresponding to the nth deflation according to the target pressure drop value and the optimized air valve deflation model.

[0011] Preferably, optimizing the air valve deflation model used in the (n - 1)th deflation according to the first pressure step and the second pressure step corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model, includes: obtaining the first pressure step and the second pressure step corresponding to the (n - 1)th deflation; obtaining the first time point of the first pressure step corresponding to the (n - 1)th deflation; obtaining the second time point of the second pressure step corresponding to the (n - 1)th deflation; updating the deflation coefficient of the air valve deflation model used in the (n - 1)th deflation according to the first pressure step, the second pressure step, the first time point and the second time point corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model.

[0012] Preferably, the initial air valve deflation model is: a*tc + b = Pc; where a is a preset first deflation coefficient, b is a preset second deflation coefficient, tc is the time point of the pressure step, and Pc is the pressure step; then updating the deflation coefficient of the air valve deflation model used in the (n - 1)th deflation according to the first pressure step, the second pressure step, the first time point and the second time point corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model, includes: substituting the first pressure step, the second pressure step, the first time point and the second time point corresponding to the (n - 1)th deflation into the air valve deflation model used in the (n - 1)th deflation to obtain an optimized third deflation coefficient a' and an optimized fourth deflation coefficient b', and obtaining the optimized air valve deflation model as: a'*tc + b' = Pc.

[0013] The specific technical solution of the second embodiment of the present invention is as follows: A stepped air release device for a blood pressure air valve, the device comprising: an acquisition unit, an air release unit, and a judgment unit; the acquisition unit is configured to obtain a first pressure step after deflating the airbag of the sphygmomanometer according to a first preset threshold after the blood pressure monitoring component of the sphygmomanometer detects an effective pulse wave, and determine a target pressure drop value according to the first pressure step and a preset stepped air release rule; the air release unit is configured to deflate the airbag according to the target pressure drop value to obtain a second pressure step after deflation; the judgment unit is configured to compare the second pressure step with a second preset threshold, and when the second pressure step is greater than or equal to the second preset threshold, use the second pressure step as the first pressure step and return to execute the step of determining the target pressure drop value according to the first pressure step and the preset stepped air release rule, and when the second pressure step is less than the second preset threshold, end the air release.

[0014] The specific technical solution of the third embodiment of the present invention is as follows: A sphygmomanometer, comprising a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the processor is caused to execute the steps of the method according to any one of the first embodiments.

[0015] The specific technical solution of the fourth embodiment of the present invention is as follows: A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor is caused to execute the steps of the method according to any one of the first embodiments.

[0016] Implementing the embodiments of the present invention will have the following beneficial effects:

[0017] After the blood pressure detection component of the sphygmomanometer detects an effective pulse wave, the airbag of the sphygmomanometer is deflated according to a first preset threshold to obtain a first pressure step after deflation; a target pressure drop value is determined according to the first pressure step and a preset stepped deflation rule; the airbag is deflated according to the target pressure drop value to obtain a second pressure step after deflation; when the second pressure step is greater than or equal to a second preset threshold, the second pressure step is used as the first pressure step, and the step of determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule is returned for execution; when the second pressure step is less than the second preset threshold, the deflation ends; the preset stepped deflation rule includes: when the blood pressure detection component can search for a pulse wave using the first pressure step, the target pressure drop value is obtained according to whether the pulse wave currently searched by the blood pressure detection component is an effective pulse wave; when the blood pressure detection component fails to search for a pulse wave using the first pressure step, the pressure drop value during the previous deflation of the airbag is obtained, and the target pressure drop value is obtained according to the pressure drop value during the previous deflation, and the pressure drop value during the previous deflation and the target pressure drop value are in a first linear relationship. By judging whether a pulse wave can be searched using the current pressure step, a preset stepped deflation rule is established to determine the target pressure drop value for each deflation, realizing the stepped deflation of the sphygmomanometer, and eliminating the need for medical staff to deflate according to experience, thus avoiding the problem of poor accuracy of the measured blood pressure value caused by medical staff deflating according to experience.

Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a flowchart of the stepped deflation method for the blood pressure air valve;

[0020] Figure 2 It is a flowchart of the preset stepped deflation rule;

[0021] Figure 3 It is a flowchart of the step of obtaining the target pressure drop value according to whether it is an effective pulse wave;

[0022] Figure 4 It is a flowchart of the step of comparing the target pressure drop value with the second preset value;

[0023] Figure 5 It is a flowchart of the step of obtaining the second pressure step according to the target pressure drop value;

[0024] Figure 6Flow chart of steps for obtaining the air valve opening time according to the target pressure drop value;

[0025] Figure 7 Flow chart of steps for obtaining an optimized air valve deflation model;

[0026] Figure 8 Structural diagram of a blood pressure air valve stepped deflation device;

[0027] Among them, 801, acquisition unit; 802, deflation unit; 803, judgment unit.

Specific implementation manner

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0029] The sphygmomanometer includes a blood pressure detection component, a cuff, an airbag, and an inflator pump. The airbag is wrapped inside the cuff. When the inflator pump inflates the airbag, the airbag expands to support the cuff to fit the human body. The blood pressure detection component is specifically a measurement circuit, and the measurement circuit is connected to the cuff. When the cuff fits the human body, the pulse wave of the human body is detected, and the measurement circuit detects the pulse wave of the human body through the cuff to achieve the measurement of blood pressure.

[0030] Please refer to Figure 1 , which is a method for stepped deflation of a blood pressure air valve in the first embodiment of the present application. A preset stepped deflation rule is established to achieve stepped deflation of the sphygmomanometer. The method includes:

[0031] Step 101: After the blood pressure detection component of the sphygmomanometer detects an effective pulse wave, deflate the airbag of the sphygmomanometer according to the first preset threshold to obtain the first pressure step after deflation;

[0032] Among them, when measuring blood pressure, there will be a lot of noise interference, such as the noise generated by the breathing and movement of the person being measured, or the environmental noise of the environment where the person being measured is located, etc., and an invalid pulse wave will be measured. Therefore, deflation is performed after detecting an effective pulse wave to exclude the interference of the invalid pulse wave. An effective pulse wave is a pulse wave with a frequency within a preset range, and the preset range can be 0-8HZ; the pressure step is the pressure value of the cuff of the sphygmomanometer.

[0033] Step 102: Determine the target pressure drop value according to the first pressure step and the preset stepped deflation rule;

[0034] For the preset stepped deflation rule, please refer to Figure 2 , and the preset stepped deflation rule includes:

[0035] Step 201: When the blood pressure detection component can detect a pulse wave using the first pressure step, obtain the target pressure drop value based on whether the currently detected pulse wave by the blood pressure detection component is a valid pulse wave.

[0036] Step 202: When the blood pressure detection component fails to detect a pulse wave using the first pressure step, obtain the pressure drop value during the previous deflation of the airbag, and obtain the target pressure drop value based on the pressure drop value during the previous deflation. The pressure drop value during the previous deflation and the target pressure drop value have a first linear relationship.

[0037] Specifically, when the first pressure step can detect a pulse wave, the pressure step required for the next detection by the blood pressure detection component is different from the pressure step required for the next detection by the blood pressure detection component when the first pressure step cannot detect a pulse wave. Therefore, it is necessary to distinguish whether the blood pressure detection component can detect a pulse wave using the first pressure step, and then determine the pressure step required for the next detection.

[0038] Step 103: Deflate the airbag according to the target pressure drop value to obtain the second pressure step after deflation.

[0039] Step 104: When the second pressure step is greater than or equal to the second preset threshold, use the second pressure step as the first pressure step, and return to execute the step of determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule.

[0040] Step 105: When the second pressure step is less than the second preset threshold, end the deflation.

[0041] In a specific embodiment, after the blood pressure detection component of the sphygmomanometer detects a valid pulse wave, the airbag of the sphygmomanometer is deflated according to the first preset threshold to obtain the first pressure step after deflation. Herein, the first preset threshold can be set according to specific requirements. For example, it can be 8 mmHg, and there is no limitation herein.

[0042] In a specific embodiment, the blood pressure detection component uses a first pressure step to search for a pulse wave, and there are two search results. One is that a pulse wave can be searched, and the other is that a pulse wave cannot be searched. Determining the target pressure drop value ΔP according to the first pressure step and the preset stepped deflation rule includes: when the blood pressure detection component can search for a pulse wave using the first pressure step, obtaining the target pressure drop value ΔP according to whether the currently searched pulse wave by the blood pressure detection component is a valid pulse wave; when the blood pressure detection component fails to search for a pulse wave using the first pressure step, obtaining the pressure drop value n during the previous deflation of the airbag, and obtaining the target pressure drop value ΔP according to the pressure drop value n during the previous deflation. Specifically, the pressure drop value n during the previous deflation and the target pressure drop value ΔP have a first linear relationship. Specifically, the first linear relationship between the pressure drop value n during the previous deflation and the target pressure drop value ΔP can be expressed as: ΔP = 5 * 1.2n.

[0043] Deflate the airbag according to the target pressure drop value ΔP to obtain the second pressure step after deflation; when the second pressure step is greater than or equal to the second preset threshold, return to execute the step of determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule, that is, determine the target pressure drop value for the next deflation according to the second pressure step and the preset stepped deflation rule, and deflate the airbag using the target pressure drop value for the next deflation to obtain the third pressure step after deflation; judge the size of the third pressure step and the second preset threshold. When the third pressure step is greater than or equal to the second preset threshold, the third pressure step is used as the first pressure step and return to execute the step of determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule until the pressure step after deflation is less than the second preset threshold, then end the deflation, where the second preset threshold can be set according to specific needs. For example, it can be 50 mmHg, and there is no limitation here.

[0044] This method determines the target pressure drop value for each deflation by judging whether a pulse wave can be searched using the current pressure step, establishes a preset stepped deflation rule, realizes the stepped deflation of the sphygmomanometer, and does not require medical staff to deflate according to experience, avoiding the problem of poor accuracy of the measured blood pressure value caused by medical staff deflating according to experience.

[0045] In a specific embodiment, please refer to Figure 3 , obtaining the target pressure drop value according to whether the currently searched pulse wave by the blood pressure detection component is a valid pulse wave in step 201 includes:

[0046] Step 301, judge whether the currently searched pulse wave by the blood pressure detection component is a valid pulse wave;

[0047] Step 302: When the detected pulse wave is a valid pulse wave, determine that the target pressure drop value is the first preset value;

[0048] Step 303: When the detected pulse wave is not a valid pulse wave, obtain the first search time for the blood pressure detection component to detect a pulse wave using the first pressure step, and obtain the target pressure drop value based on the first search time. The first search time and the target pressure drop value have a second linear relationship.

[0049] In a specific embodiment, it is determined whether the currently detected pulse wave by the blood pressure detection component is a valid pulse wave. When the detected pulse wave is a valid pulse wave, determine that the target pressure drop value ΔP is the first preset value, and the first preset value can be 8 mmHg. When the detected pulse wave is not a valid pulse wave, obtain the first search time tn for the blood pressure detection component to detect a pulse wave using the first pressure step, and obtain the target pressure drop value ΔP based on the first search time tn. The first search time tn and the target pressure drop value ΔP have a second linear relationship, which can be expressed as: ΔP = 8 * (2 / tn). By distinguishing whether the detected pulse wave is a valid pulse wave and obtaining the corresponding target pressure drop value, the probability of detecting a valid pulse wave in the next search is increased after deflating using the target pressure drop value.

[0050] In a specific embodiment, please refer to Figure 4 , after determining the target pressure drop value according to the first pressure step and the preset stepwise deflation rule in step 102, the following steps are further included:

[0051] Step 401: Determine whether the target pressure drop value is greater than the second preset value;

[0052] Step 402: When the target pressure drop value is greater than the second preset value, use the second preset value as the updated target pressure drop value;

[0053] Step 403: When the target pressure drop value is less than or equal to the second preset value, determine not to update the target pressure drop value.

[0054] Specifically, the second preset value can be 20 mmHg. When the target pressure drop value ΔP is greater than 20 mmHg, the target pressure drop value ΔP is updated to 20 mmHg, and the airbag is deflated according to 20 mmHg to obtain the second pressure step after deflation. When the target pressure drop value ΔP is less than or equal to 20 mmHg, the airbag is deflated according to the target pressure drop value ΔP to obtain the second pressure step after deflation. When the value of the target pressure drop is greater than 20, at this time, deflation is performed according to the target pressure drop value, and the airbag pressure relief is large, and the gradient deflation effect is not obvious, which is not conducive to blood pressure measurement. Therefore, when the maximum value of the target pressure drop value is set to 20 mmHg, the gradient value of deflation is controlled to improve the accuracy of blood pressure measurement.

[0055] In a specific embodiment, please refer to Figure 5 , in step 103, the airbag is deflated according to the target pressure drop value to obtain the second pressure step after deflation, including:

[0056] Step 501: Obtain the valve opening time according to the target pressure drop value and the initial air valve deflation model;

[0057] Step 502: Control the air valve of the sphygmomanometer to open for deflation according to the valve opening time. When the valve opening time is reached, close the air valve and detect the second pressure step after the air valve is closed.

[0058] In a specific embodiment, the valve opening time ΔT is obtained according to the target pressure drop value ΔP and the initial air valve deflation model. The air valve of the sphygmomanometer is controlled to open for deflation according to the valve opening time ΔT. When the air valve opens, the timer starts timing. When the timer times up to the valve opening time ΔT, close the air valve, stop deflation, and detect the second pressure step after the air valve is closed. By obtaining the valve opening time, the time point of closing the air valve can be accurately controlled, and the accuracy of the deflation volume during stepped deflation can be improved.

[0059] In a specific embodiment, please refer to Figure 6 , obtaining the valve opening time according to the target pressure drop value and the initial air valve deflation model, including:

[0060] Step 601: If it is the second deflation, obtain the valve opening time corresponding to the second deflation according to the target pressure drop value and the initial air valve deflation model;

[0061] Step 602: If it is the nth deflation, optimize the air valve deflation model used for the (n - 1)th deflation according to the first pressure step and the second pressure step corresponding to the (n - 1)th deflation, and obtain the optimized air valve deflation model, where n is an integer greater than 2;

[0062] Step 603: Obtain the valve opening time corresponding to the nth deflation according to the target pressure drop value and the optimized air valve deflation model.

[0063] Specifically, after the blood pressure detection component of the sphygmomanometer in step 101 detects an effective pulse wave, the airbag of the sphygmomanometer is deflated according to a first preset threshold, which is the first deflation, and the first pressure step after deflation is obtained; in step 103, the airbag is deflated according to the target pressure drop value, which is the second deflation, and the second pressure step after deflation is obtained. When performing the second deflation, the valve opening time corresponding to the second deflation is obtained according to the target pressure drop value and the initial air valve deflation model; when the second pressure step is greater than or equal to the second preset threshold, the third deflation needs to be performed according to the target pressure value of the third deflation. Before the third deflation, the air valve deflation model used in the second deflation is optimized according to the first pressure step and the second pressure step corresponding to the second deflation, and an optimized air valve deflation model is obtained. When performing the third deflation, the valve time corresponding to the third deflation is obtained according to the target pressure value of the third deflation and the optimized air valve deflation model. By updating the air valve deflation model and correcting the air valve deflation value per unit time of the air valve deflation model, the time point when the air valve closes can be obtained more accurately.

[0064] In a specific embodiment, please refer to Figure 7 , in step 602, the air valve deflation model used in the (n - 1)th deflation is optimized according to the first pressure step and the second pressure step corresponding to the (n - 1)th deflation, and the optimized air valve deflation model is obtained, including:

[0065] Step 701: Obtain the first pressure step and the second pressure step corresponding to the (n - 1)th deflation;

[0066] Step 702: Obtain the first time point of the first pressure step corresponding to the (n - 1)th deflation;

[0067] Step 703: Obtain the second time point of the second pressure step corresponding to the (n - 1)th deflation;

[0068] Step 704: Update the deflation coefficient of the air valve deflation model used in the (n - 1)th deflation according to the first pressure step, the second pressure step, the first time point and the second time point corresponding to the (n - 1)th deflation, and obtain the optimized air valve deflation model.

[0069] Specifically, when the deflation count is the 3rd time, obtain the first pressure step (the pressure step before the 2nd deflation) and the second pressure step (the pressure step after the 2nd deflation) corresponding to the 2nd deflation, obtain the first time point of the first pressure step corresponding to the 2nd deflation, and obtain the second time point of the second pressure step corresponding to the 2nd deflation; update the deflation coefficient of the air valve deflation model used in the 2nd deflation according to the first pressure step, the second pressure step, the first time point, and the second time point corresponding to the 2nd deflation, and obtain an optimized air valve deflation model. By updating the deflation coefficient of the air valve deflation model through the pressure steps before and after deflation and correcting the deflation value of the air valve per unit time, the time point when the air valve closes can be obtained more accurately.

[0070] In a specific embodiment, the initial air valve deflation model is: a*tc + b = Pc; where a is a preset first deflation coefficient, b is a preset second deflation coefficient, tc is the time point of the pressure step, and Pc is the pressure step.

[0071] In a specific embodiment, in step 604, updating the deflation coefficient of the air valve deflation model used in the (n - 1)th deflation according to the first pressure step, the second pressure step, the first time point, and the second time point corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model includes:

[0072] Substitute the first pressure step, the second pressure step, the first time point, and the second time point corresponding to the (n - 1)th deflation into the air valve deflation model used in the (n - 1)th deflation to obtain an optimized third deflation coefficient a' and an optimized fourth deflation coefficient b', and obtain an optimized air valve deflation model: a'*tc + b' = Pc.

[0073] Specifically, when the deflation count is the 3rd time, substitute the first pressure step Pc 1 and the second pressure step Pc 2 , the first time point tc of the first pressure step corresponding to the 2nd deflation 1 , and the second time point tc of the second pressure step corresponding to the 2nd deflation 2 into the air valve deflation model a*tc + b = Pc used in the 2nd deflation to obtain an optimized third deflation coefficient a' and an optimized fourth deflation coefficient b', and obtain an optimized air valve deflation model: a'*tc + b' = Pc. Wherein, the difference between the second time point tc 2 and the first time point tc 1 is the air valve opening time of the 2nd deflation.

[0074] For the same purpose, please refer to Figure 8, this application's second embodiment provides a stepped deflation device for a blood pressure air valve. The device includes: an acquisition unit 801, a deflation unit 802, and a judgment unit 803;

[0075] The acquisition unit 801 is used to obtain the first pressure step after deflating the airbag of the sphygmomanometer according to a first preset threshold after the blood pressure monitoring component of the sphygmomanometer detects an effective pulse wave, and determine the target pressure drop value according to the first pressure step and a preset stepped deflation rule;

[0076] The deflation unit 802 is used to deflate the airbag according to the target pressure drop value to obtain the second pressure step after deflation;

[0077] The judgment unit 803 is used to compare the second pressure step with a second preset threshold. When the second pressure step is greater than or equal to the second preset threshold, the second pressure step is used as the first pressure step, and the step of determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule is returned for execution. When the second pressure step is less than the second preset threshold, the deflation ends.

[0078] By using the device in this embodiment, it is possible to determine whether a pulse wave can be detected using the current pressure step, establish a preset stepped deflation rule, determine the target pressure drop value for each deflation, realize the stepped deflation of the sphygmomanometer, and it is not necessary for medical staff to deflate according to experience, avoiding the problem of poor accuracy of the measured blood pressure value caused by medical staff deflating according to experience.

[0079] For the same purpose, this application's third embodiment provides a sphygmomanometer, including a memory and a processor. When the computer program stored in the memory is executed by the processor, the processor executes the steps of the method described in any one of the first embodiments of this application. By using the sphygmomanometer in this embodiment, it is possible to determine whether a pulse wave can be detected using the current pressure step, establish a preset stepped deflation rule, determine the target pressure drop value for each deflation, realize the stepped deflation of the sphygmomanometer, and it is not necessary for medical staff to deflate according to experience, avoiding the problem of poor accuracy of the measured blood pressure value caused by medical staff deflating according to experience.

[0080] For the same purpose, the fourth embodiment of the present application provides a computer-readable storage medium storing a computer program, which when executed by a processor causes the processor to execute the steps of the method described in any one of the first embodiments of the present application. By using the readable storage medium in this embodiment, it is possible to determine whether a pulse wave can be searched for using the current pressure step, establish a preset stepwise deflation rule, determine the target pressure drop value for each deflation, and achieve stepwise deflation of the sphygmomanometer, without the need for medical staff to deflate according to experience, thus avoiding the problem of poor accuracy of the measured blood pressure value caused by deflation by medical staff according to experience.

[0081] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0082] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0083] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A stepped air release method for a blood pressure air valve, characterized in that, the method includes: After the blood pressure detection component of the sphygmomanometer detects an effective pulse wave, the airbag of the sphygmomanometer is deflated according to a first preset threshold to obtain a first pressure step after deflation; the effective pulse wave is a pulse wave with a frequency within a preset range; the pressure step is the pressure value of the cuff of the sphygmomanometer; Determine a target pressure drop value according to the first pressure step and a preset stepped air release rule; Deflate the airbag according to the target pressure drop value to obtain a second pressure step after deflation; When the second pressure step is greater than or equal to a second preset threshold, use the second pressure step as the first pressure step, and return to execute the step of determining the target pressure drop value according to the first pressure step and the preset stepped air release rule; When the second pressure step is less than the second preset threshold, end the air release; The preset stepped air release rule includes: When the blood pressure detection component can search for a pulse wave using the first pressure step, obtain the target pressure drop value according to whether the pulse wave currently searched by the blood pressure detection component is an effective pulse wave; When the blood pressure detection component fails to search for a pulse wave using the first pressure step, obtain the pressure drop value during the previous air release of the airbag, and obtain the target pressure drop value according to the pressure drop value during the previous air release. The pressure drop value during the previous air release and the target pressure drop value are in a first linear relationship.

2. The stepped air release method for a blood pressure air valve according to claim 1, characterized in that, The obtaining the target pressure drop value according to whether the pulse wave currently searched by the blood pressure detection component is an effective pulse wave includes: Judge whether the pulse wave currently searched by the blood pressure detection component is an effective pulse wave; When the searched pulse wave is an effective pulse wave, determine that the target pressure drop value is a first preset value; When the searched pulse wave is not an effective pulse wave, obtain the first search time when the blood pressure detection component searches for a pulse wave using the first pressure step, and obtain the target pressure drop value according to the first search time. The first search time and the target pressure drop value are in a second linear relationship.

3. The stepped air release method for a blood pressure air valve according to claim 2, characterized in that, After determining the target pressure drop value according to the first pressure step and the preset stepped air release rule, it further includes: Judge whether the target pressure drop value is greater than a second preset value; When the target pressure drop value is greater than the second preset value, use the second preset value as the updated target pressure drop value; When the target pressure drop value is less than or equal to the second preset value, determine not to update the target pressure drop value.

4. The stepped air release method for a blood pressure air valve according to claim 1, characterized in that, The deflating the airbag according to the target pressure drop value to obtain a second pressure step after deflation includes: Obtain the air valve opening time according to the target pressure drop value and an initial air valve deflation model; Open the air valve of the sphygmomanometer according to the air valve opening time for deflation, close the air valve when the air valve opening time is reached, and detect the second pressure step after the air valve is closed.

5. The stepped air valve deflation method for blood pressure as described in claim 4, wherein, obtaining the air valve opening time according to the target pressure drop value and the initial air valve deflation model includes: if it is the second deflation, obtaining the air valve opening time corresponding to the second deflation according to the target pressure drop value and the initial air valve deflation model; if it is the nth deflation, optimizing the air valve deflation model used in the (n - 1)th deflation according to the first pressure step and the second pressure step corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model, where n is an integer greater than 2; obtaining the air valve opening time corresponding to the nth deflation according to the target pressure drop value and the optimized air valve deflation model.

6. The stepped air valve deflation method for blood pressure as described in claim 5, wherein, optimizing the air valve deflation model used in the (n - 1)th deflation according to the first pressure step and the second pressure step corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model includes: obtaining the first pressure step and the second pressure step corresponding to the (n - 1)th deflation; obtaining the first time point of the first pressure step corresponding to the (n - 1)th deflation; obtaining the second time point of the second pressure step corresponding to the (n - 1)th deflation; updating the deflation coefficient of the air valve deflation model used in the (n - 1)th deflation according to the first pressure step, the second pressure step, the first time point, and the second time point corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model.

7. The stepped air valve deflation method for blood pressure as described in claim 6, wherein, the initial air valve deflation model is: a*tc + b = Pc; wherein, a is a preset first deflation coefficient, b is a preset second deflation coefficient, tc is the time point of the pressure step, and Pc is the pressure step; then updating the deflation coefficient of the air valve deflation model used in the (n - 1)th deflation according to the first pressure step, the second pressure step, the first time point, and the second time point corresponding to the (n - 1)th deflation to obtain an optimized air valve deflation model includes: Substitute the first pressure step, the second pressure step, the first time point, and the second time point corresponding to the (n - 1)-th deflation into the air valve deflation model used for the (n - 1)-th deflation to obtain an optimized third deflation coefficient and an optimized fourth deflation coefficient . The optimized air valve deflation model is obtained as follows: *tc + = Pc.

8. A stepped air valve deflation device for blood pressure, wherein, the device includes: an acquisition unit, a deflation unit, and a judgment unit; the acquisition unit is configured to obtain the first pressure step after deflation obtained by deflating the airbag of the sphygmomanometer according to a first preset threshold after the blood pressure monitoring component of the sphygmomanometer detects an effective pulse wave, and determine a target pressure drop value according to the first pressure step and a preset stepped deflation rule; the deflation unit is configured to deflate the airbag according to the target pressure drop value to obtain a second pressure step after deflation; The determination unit is configured to compare the second pressure step with a second preset threshold. When the second pressure step is greater than or equal to the second preset threshold, the second pressure step is used as the first pressure step, and the step of determining the target pressure drop value according to the first pressure step and the preset stepped deflation rule is returned for execution. When the second pressure step is less than the second preset threshold, the deflation ends; The preset stepped deflation rule includes: When the blood pressure detection component can search for a pulse wave using the first pressure step, the target pressure drop value is obtained according to whether the pulse wave currently searched by the blood pressure detection component is a valid pulse wave; When the blood pressure detection component fails to search for a pulse wave using the first pressure step, the pressure drop value during the previous deflation of the airbag is obtained, and the target pressure drop value is obtained according to the pressure drop value during the previous deflation. The pressure drop value during the previous deflation and the target pressure drop value are in a first linear relationship.

9. A sphygmomanometer, comprising a memory and a processor, characterized in that the memory stores a computer program, and when the computer program is executed by the processor, the processor is caused to execute the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that when the computer program is executed by a processor, the processor is caused to execute the steps of the method according to any one of claims 1 to 7.

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