Fault detection methods for blood pressure monitoring devices, blood pressure monitoring devices and storage media

Abstract

This application discloses a fault detection method, a blood pressure detection device, and a storage medium for a blood pressure monitoring device. The blood pressure monitoring device includes an air bladder with at least a first valve and a second valve. The fault detection method includes: during the inflation phase, inflating the air bladder to reach a preset first pressure value, wherein the preset first pressure value is less than the maximum pressure value required by the blood pressure monitoring standard; opening the first valve to deflate the air bladder; and determining the fault status of the first valve based on the change in air pressure within the air bladder during the deflation process. Through this method, this application can detect valve faults during the inflation phase of blood pressure monitoring, preventing harm to the subject from inflation to higher pressures due to valve malfunction.

Description

Technical Field

[0001] This application relates to the field of detection technology for blood pressure monitoring devices, and in particular to fault detection methods, blood pressure monitoring devices, and storage media for blood pressure monitoring devices. Background Technology

[0002] NIBP (automated non-invasive blood pressure) testing has advantages such as being non-invasive and simple to operate, and is now widely used in patient monitoring, outpatient clinics, and spot testing. Non-invasive blood pressure measurement requires attaching a cuff to the patient's arm, then inflating and deflating the cuff to obtain the patient's blood pressure value.

[0003] Non-invasive blood pressure measurement works by applying pressure to a cuff to block arterial blood flow. If the pressure within the cuff is not properly controlled, it can be harmful to the body. Therefore, there are detailed international standards for the design and evaluation of the safety and effectiveness of blood pressure measurement functions, such as ANSI / AAMI SP10:2002 and IEC 80601-2-30 (Edition 1.0 2009-01). These two standards specifically address safety requirements. Below are the safety requirements outlined in standard IEC 80601-2-30 (Edition 1.0 2009-01):

[0004] 1) During normal use, in neonatal mode, the maximum pressure of non-invasive blood pressure should not exceed 150 mmHg; in other modes, the maximum pressure of non-invasive blood pressure should not exceed 300 mmHg.

[0005] 2) Under single fault conditions:

[0006] a) The time when the pressure exceeds the maximum pressure range of +10% (i.e., 165 mmHg for newborns and 330 mmHg for other types) shall not exceed 3 seconds.

[0007] b) The pressure must not exceed the maximum pressure for more than 15 seconds.

[0008] The national standard requires that the time for the blood pressure system to deflate from 260 mmHg to 15 mmHg should not exceed 10 seconds, which sets requirements for the deflation characteristics of the valve.

[0009] Because valves can malfunction at any time, pressure may not be released quickly, potentially causing injury to the patient during blood pressure monitoring. Summary of the Invention

[0010] This application mainly provides a fault detection method for a blood pressure detection device, a blood pressure detection device, and a storage medium, which can solve the problem in the prior art that valve fault detection cannot be performed before blood pressure detection.

[0011] To address the aforementioned technical problems, the first aspect of this application provides a fault detection method for a blood pressure monitoring device. The blood pressure monitoring device includes an air bladder, on which at least a first valve and a second valve are provided. The fault detection method includes: during an inflation phase, inflating the air bladder to bring the air pressure inside the air bladder to a set first pressure value, wherein the set first pressure value is less than the maximum pressure value required by the blood pressure monitoring standard; opening the first valve to deflate the air bladder; and determining the fault status of the first valve based on the change in air pressure inside the air bladder during the deflation process.

[0012] To address the aforementioned technical problems, a second aspect of this application provides a blood pressure detection device, including a processor and a memory. The memory stores program data, and the processor executes the program data to implement the fault detection method of the blood pressure detection device provided in the first aspect.

[0013] To address the aforementioned technical problems, a third aspect of this application provides a computer-readable storage medium storing program data, which, when executed by a processor, is used to implement the fault detection method for the blood pressure detection device provided in the first aspect above.

[0014] The beneficial effects of this application are as follows: Unlike the prior art, in the inflation stage of blood pressure detection, this application inflates the airbag until the air pressure inside the airbag reaches a set first pressure value, then opens the first valve to deflate the airbag, detects the change in air pressure inside the airbag, and determines the failure status of the first valve based on the change in air pressure. This allows for valve failure detection when the air pressure inside the airbag is low, and once a valve failure is detected, inflation to a higher pressure will not be allowed, thus preventing the occurrence of hazards from the source. Attached Figure Description

[0015] Figure 1 This is a schematic flowchart of an embodiment of the fault detection method for the blood pressure detection device of this application;

[0016] Figure 2 This is a schematic flowchart of another embodiment of the fault detection method for the blood pressure detection device of this application;

[0017] Figure 3 This is a schematic flowchart of an embodiment of the fault detection of the first valve of the blood pressure detection device of this application;

[0018] Figure 4 This is a schematic flowchart of another embodiment of the fault detection of the first valve of the blood pressure detection device of this application;

[0019] Figure 5This is a schematic flowchart of an embodiment of the fault detection of the second valve of the blood pressure detection device of this application;

[0020] Figure 6 This is a schematic flowchart of another embodiment of the fault detection of the second valve of the blood pressure detection device of this application;

[0021] Figure 7 This is a schematic flowchart of another embodiment of the fault detection of the second valve of the blood pressure detection device of this application;

[0022] Figure 8 This is a flowchart illustrating another embodiment of the fault detection method for the blood pressure detection device of this application;

[0023] Figure 9 This is a schematic block diagram of the circuit structure of an embodiment of the blood pressure detection device of this application;

[0024] Figure 10 This is a schematic block diagram of the circuit structure of an embodiment of the computer-readable storage medium of this application. Detailed Implementation

[0025] 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. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] The terms "first" and "second" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] The fault detection method for the blood pressure monitoring device in this application uses a non-invasive blood pressure monitoring device as the main implementation. Non-invasive blood pressure monitoring requires attaching a cuff to the subject's arm, then inflating and deflating the cuff to obtain the patient's systolic and diastolic blood pressure parameters. The blood pressure monitoring device in this application includes an air bladder, which is placed around the subject's monitoring area during blood pressure monitoring and inflated and deflated to measure blood pressure. The air bladder may have two or more valves, including at least a first valve and a second valve, for deflating the air bladder.

[0029] It should be noted that the air bladder of a blood pressure monitoring device is typically equipped with two valves. One valve is the commonly used deflation valve, and the other valve is an additional valve added to ensure the safety of the blood pressure monitoring device in case the commonly used deflation valve fails. In this embodiment of the invention, the use of a first valve and a second valve is merely to distinguish that the air bladder has two connected valves, and does not impose any restrictions on the specific application scenarios of the valves. That is, in the following embodiments of the invention, the first valve can be either the commonly used deflation valve of the air bladder or a valve added to ensure the safety of the blood pressure monitoring device. Similarly, the second valve can be either the commonly used deflation valve of the air bladder or a valve added to ensure the safety of the blood pressure monitoring device.

[0030] The blood pressure detection process includes an inflation phase and a deflation phase. In the inflation phase, the airbag is inflated to the pressure value required for blood pressure detection. In the deflation phase, the airbag is deflated sequentially to perform multi-step blood pressure detection. In this application, the first valve and the second valve are tested for faults during the inflation phase. Specifically, after the airbag is inflated to a lower pressure level during the inflation phase, the airbag is briefly deflated to test for valve faults. After the valve fault test is completed, the airbag is inflated to the pressure value required for blood pressure detection when it is safe to do so.

[0031] The following are descriptions of various embodiments for airbag fault detection. It should be understood that the following embodiments are all performed during the inflation phase.

[0032] Please see Figure 1 , Figure 1 This is a schematic flowchart illustrating an embodiment of the fault detection method for the blood pressure monitoring device of this application. The fault detection method for the blood pressure monitoring device in this embodiment includes the following steps:

[0033] S11: During the inflation phase, the airbag is inflated so that the air pressure inside the airbag reaches the set first pressure value.

[0034] After determining the appropriate detection position on the arm or leg of the person being tested and closing all valves, this step involves inflating the airbag to bring the air pressure inside the airbag to the set first pressure value.

[0035] The first pressure value is set to be lower than the maximum pressure value required by the blood pressure testing standard. Specifically, different testing modes have different maximum pressure values ​​required by the blood pressure testing standard. For example, the testing modes may include a child mode and an adult mode, each with different corresponding maximum pressure values. After the testing mode is selected, the maximum pressure value is automatically selected.

[0036] Optionally, a first pressure value can be set to be lower than the pressure value required for blood pressure measurement. The pressure value required for blood pressure measurement is the pressure that the cuff needs to inflate to during blood pressure measurement. This required pressure value can be determined according to a blood pressure measurement algorithm. Specifically, after a blood pressure measurement of a patient, the required pressure value can be determined based on the measurement result, adaptively determining the required pressure value. For example, DeltaP can be added to the systolic pressure (or mean pressure) of the previous measurement as the required pressure value for the next blood pressure measurement. DeltaP is generally a fixed value, such as 20–40 mmHg, and may vary depending on the patient type or the blood pressure value of the current measurement. Alternatively, the required pressure value can also be determined based on a selected measurement mode. For example, measurement modes may include infant mode and adult mode, each with its own required pressure value. After selecting a measurement mode, the required pressure value is automatically selected. This is merely an illustrative example; those skilled in the art can certainly conceive of calculation methods to determine the required pressure value for blood pressure measurement.

[0037] The first pressure value can be any pressure value between 30 and 60 mmHg.

[0038] Optionally, if the air pressure inside the airbag does not reach the set first pressure value within the preset inflation time, inflation will stop and an alarm will be triggered. Specifically, when this step begins inflating the airbag, an inflation timer is started. If the air pressure inside the airbag does not reach the set first pressure value when the preset inflation time has elapsed, it indicates that the airbag is leaking. This could be due to damage to the airbag or a leak in the first valve and / or the second valve. The preset inflation time can be set to any value between 2 and 10 seconds.

[0039] Please see Figure 2 Following this step, the following operational steps may be included:

[0040] S111: The airbag is left stationary for a third preset time period.

[0041] After inflating the airbag to the set first pressure value, let it stand for a third preset time to observe whether there is any air leakage in the airbag, or whether the inflation module fails to close or malfunctions. Specifically, if the inflation module fails to close or malfunctions, the pressure inside the airbag will continue to increase during the third preset time.

[0042] S112: Determine whether the pressure change inside the airbag within the third preset time exceeds the preset pressure change value.

[0043] After the airbag has been left to stand for a third preset time, if the pressure change inside the airbag exceeds a preset pressure change value, then step S113 is executed. The pressure change can be an increase or a decrease. If the increase or decrease exceeds the preset pressure change value, it indicates a possible fault in the inflation module's shutdown or a leak. In this case, step S113 can be executed to trigger an alarm, prompting the user to detect an equipment malfunction. Otherwise, if the pressure change inside the airbag does not exceed the preset pressure change value, it can be determined that the valve is properly sealed and there is no leak. Then, step S114 is executed.

[0044] S113: Start the alarm procedure.

[0045] This step activates the alarm program to issue a warning message, alerting the user that there is an abnormality in the blood pressure monitoring device, so that the user can respond in time and avoid discomfort at the testing site caused by excessive air pressure in the airbag, or inaccurate test results due to air leakage in the airbag.

[0046] S114: Execute step S12.

[0047] If step S112 detects that the pressure change inside the airbag does not exceed the preset pressure change value within the third preset time, then the valve can be fault detected, and step S12 is executed to detect the valve fault.

[0048] S12: Open the first valve to deflate the airbag.

[0049] This step opens the first valve to check for any malfunctions. Generally, to ensure the safety of blood pressure monitoring, two or more valves are installed in the device to prevent problems during the deflation process caused by valve damage.

[0050] The first valve can be any one of multiple valves. For example, the first valve can be specified when setting up the detection program, and after being specified, the first valve will be the specified valve each time the automatic valve detection program is performed; alternatively, the operator can specify the first valve according to the detection requirements before each detection.

[0051] S13: Determine the fault status of the first valve based on the change in air pressure inside the airbag during the deflation process.

[0052] Because valve components are susceptible to damage, their venting function may malfunction, such as venting too quickly or too slowly. Therefore, this step involves monitoring the gas pressure changes within the air bladder after opening the first valve to determine if the first valve is damaged.

[0053] The malfunction of the first valve can be determined by measuring the decrease in gas pressure within the airbag over a preset time period. Alternatively, after opening the first valve, the decrease in gas pressure within the airbag can be monitored at regular intervals, and the malfunction of the first valve can be determined based on the monitoring results. A pressure decrease that is too slow or too small can indicate that the first valve may be malfunctioning.

[0054] If this step determines that the first valve is malfunctioning, the second valve can be opened and the alarm program activated to alert the user that the first valve is abnormal.

[0055] The alarm message issued after the alarm procedure is activated can be a voice prompt, which includes the number of the first valve to facilitate quick target location during maintenance. For example, the voice warning message could be "First valve abnormal" or "Valve number one abnormal," etc.

[0056] In this embodiment, the airbag is first inflated to a relatively low pressure during the inflation phase to detect valve malfunctions. This can alert the user when a valve malfunctions, allowing the user to decide whether to replace the blood pressure monitoring device or repair the valve based on the malfunction. This effectively avoids inflating the airbag to a higher pressure when a valve malfunctions, which could cause injury to the person being monitored and improves safety performance.

[0057] Please see Figure 3 , Figure 3 This is a schematic flowchart illustrating an embodiment of fault detection for the first valve of the blood pressure monitoring device of this application. This embodiment includes the following steps:

[0058] S21: During the inflation phase, the airbag is inflated so that the air pressure inside the airbag reaches the set first pressure value.

[0059] After determining the appropriate detection position on the arm or leg of the person being tested and closing all valves, this step involves inflating the airbag to bring the air pressure inside the airbag to the set first pressure value.

[0060] Optionally, a first pressure value can be set that is lower than the maximum pressure value required by the blood pressure testing standard.

[0061] S22: Open the first valve, and after maintaining the first valve in the open state for a first preset time, close the first valve.

[0062] In this embodiment, the first valve is kept in the open state for a first preset time. During the first preset time, the venting function of the first valve is checked for abnormality. If the venting function is abnormal, it is determined that the first valve is faulty.

[0063] S23: Calculate the difference in air pressure inside the airbag within the first preset time period.

[0064] The pressure difference refers to the difference between the air pressure inside the airbag when the first valve is opened and the air pressure inside the airbag when the first valve is closed. In other words, it is the decrease in air pressure inside the airbag during the process when the first valve is open.

[0065] S24: Determine whether the pressure change difference is less than the first change threshold.

[0066] If the pressure difference is less than the first change threshold, the first valve is determined to be faulty, and step S25 is executed; otherwise, if the pressure difference is greater than or equal to the first change threshold, the first valve is determined not to be faulty.

[0067] The first preset time can be set to 1 second, and the first change threshold can be set to any pressure value between 3 and 10 mmHg. Alternatively, the first change threshold can be determined by the air pressure inside the airbag when the first valve opens. Specifically, it can be obtained by subtracting the first set adjustment value from the product of the air pressure inside the airbag when the first valve opens and the first set multiplier. The calculation formula is as follows:

[0068] DeltaPLim1=μ1*StartP1–DeltaP1

[0069] Where DeltaPLim1 represents the first change threshold, μ1 represents the first set multiplier, StartP1 represents the air pressure inside the airbag when the first valve is opened, and DeltaP1 represents the first set adjustment value.

[0070] Optionally, μ1 is 0.2 and DeltaP1 is 2-3 mmHg.

[0071] S25: It has been determined that the first valve has malfunctioned.

[0072] If the first valve is determined to be faulty, the second valve can be opened and the alarm program activated to release the gas in the airbag and alert the user to the valve malfunction.

[0073] The alarm message issued after the alarm procedure is activated can be a voice prompt, which includes the number of the first valve. This facilitates quick location of the target during maintenance, allowing for direct repair or replacement of the first valve. For example, the voice warning message could be "First valve abnormal" or "Valve number one abnormal," etc.

[0074] S26: Confirm that the first valve is not malfunctioning.

[0075] After this step, fault detection of the second valve can continue.

[0076] In this embodiment, the air pressure change value inside the airbag is detected at the first preset time. Only two air pressure data need to be obtained: the air pressure value inside the airbag when the first valve is opened and the air pressure value inside the airbag when the first valve is closed. The amount of data is small, the amount of calculation is small, and the detection time is short. Moreover, the method of measuring the air release function of the first valve by the air pressure change value inside the airbag is highly accurate, intuitive and convenient.

[0077] In another embodiment, within a second preset time period after the first valve is opened, the rate of decrease in air pressure (or the value of decrease in air pressure) inside the airbag is detected at preset intervals. If the detected rate of decrease in air pressure is less than or equal to a first rate threshold, it is determined that the first valve has malfunctioned. If no rate of decrease in air pressure is detected less than or equal to the first rate threshold within the second preset time period, it is determined that the first valve has not malfunctioned, and the valve is closed. Please refer to [link / reference] for details. Figure 3 , Figure 3 This is a schematic flowchart illustrating another embodiment of the fault detection of the first valve in the blood pressure monitoring device of this application. This embodiment includes the following steps:

[0078] S31: During the inflation phase, the airbag is inflated so that the air pressure inside the airbag reaches the set first pressure value.

[0079] After determining the appropriate detection position on the arm or leg of the person being tested and closing all valves, this step involves inflating the airbag to bring the air pressure inside the airbag to the set first pressure value.

[0080] Optionally, a first pressure value can be set that is lower than the maximum pressure value required by the blood pressure testing standard.

[0081] S32: Open the first valve to deflate the airbag.

[0082] In this embodiment, the first valve is opened to detect whether the venting function of the first valve is abnormal. If the venting function is abnormal, it is determined that the first valve is faulty.

[0083] This step involves opening the first valve while simultaneously starting a timer to check for any abnormalities in the venting function of the first valve within a second preset time interval. The second preset interval can be, for example, 1 to 3 seconds.

[0084] S33: Detect the rate of decrease in air pressure inside the airbag at preset intervals.

[0085] The preset interval time can be any time value between 8 and 15 milliseconds, such as 9 milliseconds, 10 milliseconds, 12 milliseconds, etc.

[0086] The air pressure descent rate is calculated as follows: the difference between the air pressure inside the airbag at the start of the preset interval and the air pressure at the end of the preset interval, divided by the preset interval.

[0087] Rate = (StartP2 - NowP2) / DeltaT

[0088] Where Rate represents the rate of air pressure decrease, StartP2 represents the air pressure value inside the airbag at the start of the preset interval timer, NowP2 represents the air pressure value inside the airbag at the end of the preset interval timer, and DeltaT represents the preset interval time.

[0089] S34: Determine whether the rate of air pressure drop is less than or equal to the first rate threshold.

[0090] If the rate of decrease in air pressure is less than or equal to the first rate threshold, it indicates that the first valve may be blocked, causing abnormal air release function. The first valve is then confirmed to be faulty, and step S35 is executed. Otherwise, if the rate of decrease in air pressure is greater than the first rate threshold, it indicates that the first valve is not faulty, and step S36 is executed.

[0091] The first rate threshold can be set to 3–5 mmHg / s.

[0092] S35: It has been determined that the first valve has malfunctioned.

[0093] If the first valve is found to be faulty, the second valve can be opened and the alarm program activated to release the gas in the airbag and serve as a warning.

[0094] The alarm message issued after the alarm procedure is activated can be a voice prompt, which includes the number of the first valve to facilitate quick target location during maintenance. For example, the voice warning message could be "First valve abnormal" or "Valve number one abnormal."

[0095] S36: Determine whether the opening time of the first valve has reached the second preset time.

[0096] If the opening time of the first valve reaches the second preset time, step S37 can be executed and the first valve can be closed; if the opening time of the first valve does not reach the second preset time, return to step S33 and continue to monitor the venting process of the first valve.

[0097] S37: Confirm that the first valve is not malfunctioning.

[0098] After this step, if there are still other valves that have not been tested, then those valves can be tested for faults. Alternatively, after confirming that the first valve is not faulty, inflate it to the pressure required by the blood pressure testing standard and then perform a blood pressure test.

[0099] In this embodiment, the rate of decrease in air pressure inside the airbag is detected at preset intervals, which can greatly reduce the detection time of the first valve and improve detection efficiency.

[0100] After confirming that the first valve is not malfunctioning (i.e., after step S26 or S37), a fault detection is performed on the second valve to ensure the safety of the blood pressure monitoring process. Please refer to [link to relevant documentation]. Figure 5 This may include the following steps:

[0101] S41: Close the first valve.

[0102] The procedure for closing the first valve can be performed immediately after the fault detection of the first valve is completed.

[0103] After this step, the air pressure inside the airbag can be checked. If the air pressure inside the airbag is less than or equal to the preset second pressure value, the airbag is inflated to make the air pressure inside the airbag greater than the preset second pressure value, thus avoiding inaccurate fault detection results due to excessively low air pressure inside the airbag. After the airbag is inflated to a pressure greater than the preset second pressure value, wait 1-2 seconds for the air path to stabilize before proceeding to step S24 to improve detection accuracy.

[0104] If the air pressure inside the airbag is detected to be greater than the preset second pressure value, inflation will stop and step S42 will be executed directly.

[0105] S42: Open the second valve to deflate the airbag.

[0106] This step involves opening the second valve to check for any malfunctions.

[0107] The second valve can be any one of multiple valves. For example, the second valve can be specified when setting up the detection program, and once specified, the second valve will be the specified valve each time the automatic valve detection program is performed; alternatively, the operator can specify the second valve according to the detection requirements before each detection.

[0108] S43: Determine the fault status of the second valve based on the change in air pressure inside the airbag during the deflation process.

[0109] Because valve components are susceptible to damage, a damaged valve may malfunction, resulting in abnormal venting functions, such as venting too quickly or too slowly. Therefore, this step involves monitoring the gas pressure changes within the venting chamber after opening the second valve to determine if the second valve is damaged.

[0110] The malfunction of the second valve can be determined by measuring the decrease in gas pressure within the airbag over a preset time period. Alternatively, after opening the second valve, the decrease in gas pressure within the airbag can be measured at regular intervals, and the malfunction of the second valve can be determined based on the measurement results. A pressure decrease that is too slow or too small can indicate a potential malfunction of the second valve.

[0111] In one embodiment, please refer to Figure 6 Fault detection of the second valve may include the following steps:

[0112] S51: Close the first valve.

[0113] The procedure for closing the first valve can be performed immediately after the fault detection of the first valve is completed.

[0114] After this step, the air pressure inside the airbag can be checked. If the air pressure inside the airbag is less than or equal to the preset second pressure value, the airbag is inflated to make the air pressure inside the airbag greater than the preset second pressure value, thus avoiding inaccurate fault detection results due to excessively low air pressure inside the airbag. After the airbag is inflated to a pressure greater than the preset second pressure value, wait 1-2 seconds for the air path to stabilize before proceeding to step S52 to improve detection accuracy.

[0115] If the air pressure inside the airbag is detected to be greater than the preset second pressure value, inflation will stop and step S52 will be executed directly.

[0116] S52: Open the second valve, and after maintaining the second valve in the open state for a fourth preset time, close the second valve.

[0117] In this embodiment, the second valve is kept open for a fourth preset time. During the fourth preset time, the venting function of the second valve is checked for abnormality. If the venting function is abnormal, it is determined that the second valve is faulty.

[0118] S53: Calculate the difference in air pressure inside the airbag within the fourth preset time period.

[0119] The pressure difference refers to the difference between the air pressure inside the airbag when the second valve is opened and the air pressure inside the airbag when the second valve is closed. In other words, it is the decrease in air pressure inside the airbag during the process when the second valve is open.

[0120] S54: Determine whether the pressure change difference is less than the second change threshold.

[0121] If the pressure difference is less than the second threshold, the second valve is determined to be faulty, and step S55 is executed; otherwise, if the pressure difference is greater than or equal to the second threshold, the second valve is determined not to be faulty.

[0122] The fourth preset time can be set to 1 second, and the second change threshold can be set to any air pressure value between 3 and 10 mmHg. Alternatively, the second change threshold can be determined by the air pressure inside the airbag when the second valve opens. Specifically, it can be obtained by subtracting the second set adjustment value from the product of the air pressure inside the airbag when the second valve opens and the second set multiplier. The calculation formula is as follows:

[0123] DeltaPLim2=μ2*StartP3–DeltaP2

[0124] Where DeltaPLim2 represents the second change threshold, μ2 represents the second set multiplier, StartP3 represents the air pressure inside the airbag when the second valve is opened, and DeltaP2 represents the second set adjustment value.

[0125] Optionally, μ2 is 0.2 and DeltaP2 is 2-3 mmHg.

[0126] S55: It has been determined that the second valve has malfunctioned.

[0127] If the second valve is determined to be faulty, the first valve can be opened and the alarm program activated to release the gas in the airbag and alert the user to the valve malfunction.

[0128] The alarm message issued after activation can be a voice prompt containing the second valve's identification number, facilitating quick location of the target during maintenance and allowing for direct repair or replacement of the second valve. For example, the voice warning message could be "Second valve malfunction" or "Valve number two malfunction," etc.

[0129] S56: Confirm that the second valve is not malfunctioning.

[0130] After this step, you can continue to test other valves for fault detection. Alternatively, after closing the second valve, inflate the airbag to the pressure required by the blood pressure testing standard and directly perform blood pressure testing.

[0131] In this embodiment, the air pressure change value inside the airbag is detected at the fourth preset time. Only two air pressure data need to be obtained: the air pressure value inside the airbag when the second valve is opened and the air pressure value inside the airbag when the second valve is closed. The amount of data is small, the amount of calculation is small, and the detection time is short. Moreover, the method of measuring the air release function of the second valve by the air pressure change value inside the airbag is highly accurate, intuitive and convenient.

[0132] In another embodiment, within a fifth preset time period after the second valve is opened, the rate of decrease in air pressure (or the value of decrease in air pressure) inside the airbag is detected at preset intervals. If the detected rate of decrease in air pressure is less than or equal to a second rate threshold, it is determined that the second valve has malfunctioned. If no rate of decrease in air pressure is detected less than or equal to the second rate threshold within the fifth preset time period, it is determined that the second valve has not malfunctioned, and the valve is closed. Please refer to [link / reference] for details. Figure 7 , Figure 7 This is a schematic flowchart illustrating another embodiment of the fault detection of the second valve in the blood pressure monitoring device of this application. This embodiment includes the following steps:

[0133] S61: Close the first valve.

[0134] The procedure for closing the first valve can be performed immediately after the fault detection of the first valve is completed.

[0135] After this step, the air pressure inside the airbag can be checked. If the air pressure inside the airbag is less than or equal to the preset second pressure value, the airbag is inflated to make the air pressure inside the airbag greater than the preset second pressure value, thus avoiding inaccurate fault detection results due to excessively low air pressure inside the airbag. After the airbag is inflated to a pressure greater than the preset second pressure value, wait 1-2 seconds for the air path to stabilize before proceeding to step S62 to improve detection accuracy.

[0136] If the air pressure inside the airbag is detected to be greater than the preset second pressure value, inflation will stop and step S62 will be executed directly.

[0137] S62: Open the second valve to deflate the airbag.

[0138] In this embodiment, the second valve is opened to detect whether the venting function of the second valve is abnormal. If the venting function is abnormal, it is determined that the second valve is faulty.

[0139] This step involves opening the second valve while simultaneously starting a timer to check for any abnormalities in the second valve's venting function within a fifth preset time interval. The second preset interval can be, for example, 1 to 3 seconds.

[0140] S63: Detect the rate of decrease in air pressure inside the airbag at preset intervals.

[0141] The preset interval time can be any time value between 8 and 15 milliseconds, such as 9 milliseconds, 10 milliseconds, 12 milliseconds, etc.

[0142] The air pressure descent rate is calculated as follows: the difference between the air pressure inside the airbag at the start of the preset interval and the air pressure at the end of the preset interval, divided by the preset interval.

[0143] Rate = (StartP4 - NowP4) / DeltaT

[0144] Where Rate represents the rate of air pressure decrease, StartP4 represents the air pressure value inside the airbag at the start of the preset interval timer, NowP4 represents the air pressure value inside the airbag at the end of the preset interval timer, and DeltaT represents the preset interval time.

[0145] In this embodiment, the rate of decrease in air pressure inside the airbag is detected at preset intervals, which can greatly reduce the detection time of the second valve and improve detection efficiency.

[0146] S64: Determine whether the rate of pressure drop is less than or equal to the second rate threshold.

[0147] If the rate of decrease in air pressure is less than or equal to the second rate threshold, it indicates that the second valve may be blocked, causing abnormal air release function. The second valve is then confirmed to be faulty, and step S65 is executed. Otherwise, if the rate of decrease in air pressure is greater than the second rate threshold, it indicates that the second valve is not faulty, and step S66 is executed.

[0148] The second rate threshold can be set to 3–5 mmHg / s.

[0149] S65: It has been determined that the second valve has malfunctioned.

[0150] If a malfunction is confirmed in the second valve, it can be opened and an alarm program activated to release the gas inside the airbag and serve as a warning.

[0151] The alarm message issued after the alarm procedure is activated can be a voice prompt, which includes the number of the second valve to facilitate quick location of the target during maintenance. For example, the voice warning message could be "Second valve abnormal" or "Valve number two abnormal."

[0152] S66: Determine whether the opening time of the second valve has reached the fifth preset time.

[0153] If the opening time of the second valve reaches the fifth preset time, step S67 can be executed and the second valve can be closed; if the opening time of the second valve does not reach the fifth preset time, return to step S63 and continue to monitor the venting process of the second valve.

[0154] S67: Confirm that the second valve is not malfunctioning.

[0155] In one embodiment, after determining that the second valve has not malfunctioned, if there are other valves to be tested, the second valve can be closed, and the fault detection of the other valves to be tested can continue. The detection method is the same as that of the second valve, and will not be described again here.

[0156] In another embodiment, please refer to Figure 8 After step S67 determines that the second valve has not malfunctioned, the following steps may be included:

[0157] S71: Close the second valve and continue to inflate the airbag until the air pressure inside the airbag reaches the detection standard, thus completing the inflation operation of the airbag during the inflation phase.

[0158] The procedure for closing the second valve can be performed immediately after the fault detection of the second valve is completed.

[0159] The detection standard, or pressure value required for blood pressure measurement, is the air pressure that the cuff must reach during the measurement. The detection standard can vary depending on the detection mode, such as infant mode or adult mode. Before the blood pressure measurement, the user can select the appropriate mode based on the subject. Once the mode is selected, the detection standard is determined. The detection standard can also be determined based on the blood pressure measurement algorithm. Specifically, after a blood pressure measurement, the required pressure value can be determined based on the result. This adaptive determination of the required pressure value can be achieved by adding DeltaP to the systolic (or mean) pressure of the previous measurement as the required pressure value for the next measurement. DeltaP is generally a fixed value, such as 20–40 mmHg, but can vary depending on the patient type or the blood pressure value of the current measurement.

[0160] Optionally, after closing the second valve, the air pressure inside the airbag can be detected before inflation. If the air pressure inside the airbag reaches the detection standard, there is no need to inflate it further, and step S72 can be executed to directly detect blood pressure.

[0161] The system monitors the air pressure inside the airbag in real time during inflation. Once the air pressure inside the airbag is detected to be greater than or equal to the detection standard, the inflation module is shut down and inflation is stopped.

[0162] S72: Deflating the airbag during the deflation phase to perform blood pressure monitoring.

[0163] This step involves deflating the airbag and measuring blood pressure during this phase to obtain data such as diastolic pressure, systolic pressure, and mean pressure. Deflating can be performed by opening the first and / or second valves, or by controlling the opening and closing of the valves connected to the airbag according to a pre-set blood pressure monitoring program.

[0164] With two valves, if one valve malfunctions, the other could malfunction at any time. If the other valve malfunctions during blood pressure monitoring, it could lead to delayed venting, causing continuous pressure on the monitored area and potentially resulting in local ischemia or even pressure injury. This embodiment performs blood pressure monitoring only after confirming that both the first and second valves are intact, ensuring that both valves can release air normally during the monitoring process. Even if a valve malfunctions during monitoring, the probability of both valves malfunctioning simultaneously under normal operation is extremely low. This ensures that at least one valve functions normally during blood pressure monitoring, greatly enhancing the safety of the monitoring process.

[0165] Please see Figure 9 , Figure 9 This is a schematic block diagram of the circuit structure of an embodiment of the blood pressure detection device of this application. The blood pressure detection device 200 includes a processor 201 and a memory 202. The memory 202 is used to store program data, and the processor 201 is used to execute the program data to implement the following method:

[0166] During the inflation phase, the airbag is inflated to bring the air pressure inside the airbag to a set first pressure value, which is less than the maximum pressure value required by the blood pressure detection standard; the first valve is opened to deflate the airbag; the change in air pressure inside the airbag is detected to determine the malfunction of the first valve.

[0167] Understandably, the processor 201 in this embodiment is also used to implement the steps of the various embodiments of the fault detection method for the blood pressure detection device of this application described above. For a description of each step of the processing execution, please refer to the description of each step in the embodiments of the fault detection method for the blood pressure detection device of this application described above, and it will not be repeated here.

[0168] See Figure 10 , Figure 10 This is a schematic block diagram of a circuit structure of an embodiment of a computer-readable storage medium 300 of this application. The computer-readable storage medium 300 stores program data 301, which, when executed by a processor, is used to implement the following method:

[0169] During the inflation phase, the airbag is inflated to bring the air pressure inside the airbag to a set first pressure value, which is less than the maximum pressure value required by the blood pressure detection standard; the first valve is opened to deflate the airbag; the change in air pressure inside the airbag is detected to determine the malfunction of the first valve.

[0170] Understandably, when the program data 301 in this embodiment is executed by the processor, it is also used to implement the steps of the various embodiments of the fault detection method of the blood pressure detection device of this application described above.

[0171] For a description of each step of the processing, please refer to the description of each step in the above embodiment of the fault detection method for the blood pressure detection device of this application, and it will not be repeated here.

[0172] The computer storage medium 300 can be any medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0173] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0174] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0175] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0176] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A fault detection method for a blood pressure monitoring device, characterized in that, The blood pressure detection device includes an air bladder, which is provided with at least a first valve and a second valve. The fault detection method includes: During the inflation phase of the blood pressure detection process, the airbag is inflated so that the air pressure inside the airbag reaches a set first pressure value, wherein the set first pressure value is less than the maximum pressure value required by the blood pressure detection standard. Open the first valve to deflate the airbag; Based on the change in air pressure inside the airbag during the deflation process, determine the fault condition of the first valve; If it is determined that the first valve is not faulty, perform a fault detection on the second valve, or inflate it to the pressure required by the blood pressure detection standard and perform a blood pressure test.

2. The method according to claim 1, characterized in that, Opening the first valve includes: Open the first valve, and after maintaining the first valve in the open state for a first preset time, close the first valve; The step of determining the malfunction of the first valve based on the change in air pressure inside the airbag during the deflation process includes: Calculate the pressure difference inside the airbag within the first preset time period; When the pressure difference is less than a first threshold value, the first valve is determined to be faulty.

3. The method according to claim 1, characterized in that, The step of determining the malfunction of the first valve based on the change in air pressure inside the airbag during the deflation process includes: During a second preset time period, the rate of decrease in air pressure inside the airbag is detected at preset intervals. When the rate of pressure drop is detected to be less than or equal to a first rate threshold, it is determined that the first valve has malfunctioned.

4. The method according to claim 2 or 3, characterized in that, After determining that the first valve has malfunctioned, the method further includes: opening the second valve and activating an alarm.

5. The method according to claim 1, characterized in that, The fault detection of the second valve includes: If it is determined that the first valve is not malfunctioning, then close the first valve; Open the second valve to deflate the airbag; The malfunction of the second valve is determined based on the change in air pressure inside the airbag during the deflation process.

6. The method according to claim 5, characterized in that... Before opening the second valve to deflate the airbag, the method further includes: The air pressure inside the airbag is detected. When the air pressure inside the airbag is less than or equal to a preset second pressure value, the airbag is inflated so that the air pressure inside the airbag is greater than the preset second pressure value.

7. The method according to claim 5, characterized in that, If it is determined that the second valve is not malfunctioning, the method further includes: Close the second valve and continue to inflate the airbag until the air pressure inside the airbag reaches the detection standard, so as to complete the inflation operation of the airbag in the inflation stage. The airbag is deflated during the deflation phase to detect blood pressure.

8. The method according to claim 1, characterized in that, After inflating the airbag to bring the air pressure inside the airbag to a set first pressure value, the method further includes: Determine whether the pressure change inside the airbag within a third preset time period exceeds a preset pressure change value; If the pressure change exceeds the preset pressure change value, an alarm procedure will be activated.

9. The method according to claim 1, characterized in that, The first pressure value is 30~60 mmHg.

10. A blood pressure detection device, characterized in that, The blood pressure detection device includes a processor and a memory, the memory being used to store program data, and the processor being used to execute the program data to implement the method as described in any one of claims 1-9.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program data, which, when executed by a processor, is used to implement the method as described in any one of claims 1-9.

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