Blood pressure measuring device and blood pressure measurement method

Abstract

This invention provides a blood pressure measuring device. The device includes an inflation pump, a constant-speed deflation valve, and a control circuit. The inflation pump is connected to a cuff. The constant-speed deflation valve is connected to the cuff. The control circuit is connected to the inflation pump. When the control circuit determines the required deflation time of the cuff based on the initial pressurization time, while the constant-speed deflation valve deflates the cuff, the control circuit simultaneously controls the inflation pump to inflate the cuff, thereby adjusting the deflation time. The initial pressurization time is the time it takes for the inflation pump to inflate the cuff to a preset pressure value at the initial pressurization rate.

Description

Technical Field

[0001] This invention relates to a blood pressure measuring device and a blood pressure measuring method thereof, and particularly to a blood pressure measuring device and a blood pressure measuring method applicable to different types of cuffs and different subjects. Background Technology

[0002] Current blood pressure measurement devices cannot automatically adjust the corresponding blood pressure measurement mode for different types of cuffs. Instead, they must be pre-configured with a "child mode" or "adult mode" and the cuff size must be set specifically for children or adults to avoid injury to the subject or inaccurate measurement during blood pressure measurement.

[0003] However, if a blood pressure measuring device could be provided that can automatically identify and adapt to different cuff types and different test subjects, it would be more convenient and safer to use. Summary of the Invention

[0004] Some embodiments of the present invention provide a blood pressure measuring device. This blood pressure measuring device includes an inflation pump, a constant-speed deflation valve, and a control circuit. The inflation pump is connected to a cuff. The constant-speed deflation valve is connected to the cuff. The control circuit is connected to the inflation pump. When the control circuit determines the required deflation time of the cuff based on the initial pressurization time, while the constant-speed deflation valve deflates the cuff, the control circuit controls the inflation pump to simultaneously inflate the cuff, thereby adjusting the deflation time of the cuff. The initial pressurization time is the time it takes for the inflation pump to inflate the cuff to a preset pressure value at the initial pressurization rate.

[0005] Some embodiments of the present invention provide a blood pressure measurement method. This blood pressure measurement method is applicable to a blood pressure measuring device. The blood pressure measuring device includes an air pump, a constant-speed deflation valve, and a cuff. The blood pressure measurement method includes the following steps: in initial operation, the air pump inflates the cuff to a preset pressure value at an initial pressurization rate, and the control circuit obtains the initial pressurization time length; the control circuit determines whether to adjust the depressurization time length of the cuff based on the initial pressurization time length; and when it is determined that the depressurization time length needs to be adjusted, in the measurement operation, while the constant-speed deflation valve deflates the cuff, the control circuit controls the air pump to simultaneously inflate the cuff to adjust the depressurization time length of the cuff.

[0006] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0007] To make the above and other objects, features, advantages and embodiments of the present invention more apparent and understandable, the accompanying drawings are described below:

[0008] Figure 1 This is a schematic diagram of a blood pressure measuring device according to some embodiments of the present invention;

[0009] Figure 2 A flowchart of a blood pressure measurement method according to some embodiments of the present invention; and

[0010] Figure 3 This is a diagram showing experimental data of the operation of a blood pressure measuring device according to some embodiments of the present invention.

[0011] Figure Labels

[0012] 100: Blood pressure measuring device

[0013] 110: Control Circuit

[0014] 130: Air pump

[0015] 150: Uniform speed relief valve

[0016] 170: Quick-release valve

[0017] 900: Bandage

[0018] 112: Control chip

[0019] 114: Pressure sensing circuit

[0020] 116: Filtering circuit

[0021] 118: Bluetooth communication circuit

[0022] 200: Blood Pressure Measurement Methods

[0023] S210, S230, S250: Steps

[0024] C1, C2, C3: Curves

[0025] D1, D2: Points

[0026] T1: Initial pressurization time length

[0027] T2: Pressurization time length

[0028] T3: Decompression time length

[0029] P1: Preset pressure value

[0030] P2: Measured pressure value Detailed Implementation

[0031] The term "coupled" as used in this article can also refer to "electrical coupling," and the term "connection" can also refer to "electrical connection." "Coupled" and "connection" can also refer to two or more components cooperating or interacting with each other.

[0032] Please see Figure 1 . Figure 1 This is a schematic diagram of a blood pressure measuring device 100 according to some embodiments of the present invention.

[0033] like Figure 1 As shown, the blood pressure measuring device 100 includes a control circuit 110, an air pump 130, a constant-speed deflation valve 150, and a rapid deflation valve 170. In terms of connections, the control circuit 110 is connected to the rapid deflation valve 170, and the control circuit 110 is also connected to the air pump 130. The control circuit 110, air pump 130, constant-speed deflation valve 150, and rapid deflation valve 170 are all connected to the compression band 900.

[0034] like Figure 1 As shown, in some embodiments, the control circuit 110 includes a control chip 112, a pressure sensing circuit 114, a filtering circuit 116, and a Bluetooth communication circuit 118. In terms of connections, the pressure sensing circuit 114 is connected to the filtering circuit 116, the filtering circuit 116 is connected to the control chip 112, and the control chip 112 is connected to the Bluetooth communication circuit 118. The pressure sensing circuit 114 is also connected to the pressure band 900. The control chip 112 is also connected to the air pump 130 and the quick-release valve 170.

[0035] Please see Figure 2 . Figure 2 This is a flowchart illustrating a blood pressure measurement method 200 according to some embodiments of the present invention. The blood pressure measurement method 200 can be derived from... Figure 1 The blood pressure measuring device 100 performs the measurement. The blood pressure measuring method 200 includes steps S210 to S250.

[0036] In step S210, during the initial operation, the pressure band is inflated to a preset pressure value by the air pump at an initial pressurization rate, and the initial pressurization time is obtained by the control circuit. Please refer to [further details omitted]. Figure 1 Step S210 can be performed as follows: Figure 1 The air pump 130 and control circuit 110 shown are used for this operation.

[0037] Please refer to the following: Figure 1 In the initial operation, the air pump 130 inflates the pressure band 900 at an initial pressurization rate until the pressure value of the pressure band 900 increases from 0 to a preset pressure value, or the air pump 130 inflates the pressure band 900 at the initial pressurization rate until the pressure value of the pressure band 900 increases from 0 to 80% to 90% of the preset pressure value, i.e., the initial pressurization time length obtained by the control circuit 110. In some embodiments, the initial pressurization rate is the maximum pressurization rate or the upper limit of the maximum pressurization rate; however, the embodiments of this invention are not limited to the above.

[0038] For example, please refer to the following: Figure 3 . Figure 3 According to some embodiments of the present invention, such as Figure 1 Figure 300 shows the experimental data of the operation of the blood pressure measuring device. In Figure 300, the horizontal axis represents time (t), and the vertical axis represents... Figure 1 The pressure value of the pressure band is 900. Figure 3 Curve C1 in the figure represents the experimental data of the initial operation. Point D1 in curve C1 represents the initial pressurization time T1 when the pressure band 900 reaches the preset pressure value P1 in the initial operation.

[0039] The preset pressure value P1 is 140 mmHg, 150 mmHg, or 160 mmHg, etc., and the initial pressurization time T1 is 5.5 seconds, 6 seconds, or 6.5 seconds, etc. However, the implementation methods in this case are not limited to the above.

[0040] Next, as Figure 3 As shown in curve C1, during the initial operation, when the air pump 130 inflates the pressure band 900 at the initial pressurization rate and the pressure band 900 reaches the preset pressure value, the quick release valve 170 releases the pressure band 900 so that the pressure value of the pressure band 900 drops to 0, thus completing the determination of the type of pressure band or the type of the subject.

[0041] In step S230, the control circuit determines whether to adjust the depressurization time of the pressure pulsator based on the initial pressurization time. Please refer to [link / reference needed]. Figure 1 In some embodiments, step S230 is performed by, for example... Figure 1 The control circuit 110 shown is used for execution.

[0042] In step S230, when the initial pressurization time is less than or greater than the pressurization time reference value, or when the initial pressurization time is less than or greater than 1.05% to 1.15% of the pressurization time reference value, the control circuit 110 determines that at least one of the pressurization time and depressurization time of the pressure pulse band 900 needs to be adjusted.

[0043] In some cases, when the initial pressurization time is less than or greater than a reference value for pressurization time, the control circuit 110 also determines that at least one of the initial pressurization time and the depressurization time needs to be adjusted. Specifically, if the initial pressurization time is different from or does not conform to the reference value for pressurization time, the control circuit 110 determines that the blood pressure measurement mode of the blood pressure measuring device 100 needs to be changed or added. After the control circuit 110 changes or adds a blood pressure measurement mode, the reference value for the initial pressurization time is also adjusted to a value corresponding to the changed or added blood pressure measurement mode.

[0044] For example, suppose the blood pressure measuring device 100 has two modes: an adult mode (L-size) and a child mode. The initial inflation time for the adult mode (L-size) is 10 seconds, while the initial inflation time for the child mode is 5 seconds. If, during the initial operation of step S210, the blood pressure measuring device 100 is preset to the adult mode (L-size), and the control circuit 110 obtains an initial inflation time of 5 seconds, the control circuit 110 will adjust the blood pressure measuring device 100 to the child mode based on the initial inflation time and adjust the initial inflation time reference value to 5 seconds.

[0045] In another example, during the initial operation of step S210, the blood pressure measurement mode of the blood pressure measuring device 100 is preset to adult mode (L size), and the initial pressurization time length obtained by the control circuit 110 is 7 seconds. At this time, the control circuit 110 adds a new blood pressure measurement mode to adult mode (M size) based on the initial pressurization time length, and adjusts the initial pressurization time length reference value to 7 seconds. At the same time, the blood pressure measurement mode also adjusts the above values, such as: preset pressure value, pressurization time length reference value, adjustment current, pressurization current, etc.

[0046] In step S250, when it is determined that the pressure relief time needs to be adjusted, during the measurement operation, while the pressure pulsator is being depressurized by the uniform-speed depressurization valve, the control circuit simultaneously controls the inflation pump to inflate the pressure pulsator, thereby adjusting the pressure relief time of the pressure pulsator. Step S250 is as follows: Figure 1 The control circuit 110, air pump 130, and constant speed deflation valve 150 shown are used for execution.

[0047] When it is determined that the pressure relief time needs to be adjusted, the control circuit 110 inputs an adjustment current to the air pump 130, so that the air pump 130, according to the adjustment current, deflates the pressure pulse 900 through the uniform speed relief valve 150 while simultaneously inflating the pressure pulse 900, thereby reducing the pressure relief rate of the pressure pulse 900 and thus making the pressure relief time longer.

[0048] Assuming that in the initial operation, the air pump 130 receives an initial pressurization current from the control circuit 110 to inflate the pressure band 900 according to the initial pressurization rate based on the initial pressurization current, then in the measurement operation of step S250, while the constant-speed deflation valve 150 is depressurizing, the adjustment current input from the control circuit 110 to the air pump 130 is 3% to 20% of the initial pressurization current, for example, it can be 3%, 5%, 8%, 10%, or 12%, etc. The above adjustment current is only for illustrative purposes, and the implementation of this invention is not limited to the above.

[0049] If, in step S230, the control circuit 110 determines that the pressure application time of the pressure band 900 needs to be adjusted, in step S250, the control circuit 110 further determines that the pressure application rate of the pressure band 900 needs to be adjusted. During the measurement operation, the control circuit 110 adjusts the pressure application rate to ensure that the pressure application time is not less than a reference value.

[0050] Assuming that in the initial operation, the air pump 130 receives an initial pressurizing current from the control circuit 110 to inflate the pressure band 900 at an initial pressurizing rate based on the initial pressurizing current, then in the measurement operation of step S250, the pressurizing current input by the control circuit 110 to the air pump 130 is 40% to 80% of the initial pressurizing current, for example, 45%, 50%, 55%, 60%, or 70%, etc. The above pressurizing current is for illustrative purposes only, and the implementation of this invention is not limited to the above.

[0051] Please refer to the following: Figure 3 . Figure 3 Curve C2 in the figure represents the experimental data of the measurement operation where the pressurization time was adjusted but the depressurization time was not. Figure 3 Curve C3 in the figure represents the experimental data from the measurement operations of adjusting the pressurization time and the depressurization time.

[0052] Both curves C2 and C3 include point D2. Point D2 represents the inflation time T2 when the pressure band 900 reaches the measured pressure value P2. In some embodiments, the measured pressure value P2 may be the same as or similar to the preset pressure value P1, or it may correspond to the preset pressure value depending on the adjusted blood pressure measurement mode.

[0053] The adjusted pressurization time T2 is twice the initial pressurization time T1, while the adjusted depressurization time T3 (the time it takes for the pressure band 900 to drop from the measured pressure value P2 to 0) can be three, four, or five times the initial pressurization time T1, etc. In some embodiments, the adjusted pressurization time T2 can be 10 (± error) seconds, 11 seconds, 12 seconds, or 15 seconds, etc. The above-mentioned adjusted pressurization time T2 and adjusted depressurization time T3 are only illustrative examples, and the implementation of this invention is not limited to the above.

[0054] When the initial inflator time is less than the baseline inflator time, it indicates that the cuff 900 is the size of a young child or a small animal. Therefore, the control circuit 110 adjusts the inflator and deflation times of the cuff 900 to ensure that the inflator rate is not too rapid and could harm the subject. Furthermore, by extending the deflation time, blood pressure can be measured more accurately. This improves safety and accuracy during operation and enhances the user experience for the subject when measuring blood pressure.

[0055] On the other hand, if the initial inflator time is not less than the inflator time reference value, it means that the size of the cuff 900 is the size of an adult or a large animal. Therefore, the control circuit 110 does not need to adjust the inflator time and deflator time of the cuff 900 to perform the measurement. Alternatively, the control circuit 110 can be adjusted to shorten the inflator time and deflator time of the cuff 900 to reduce the time required for the subject to have their blood pressure measured.

[0056] Thus, the blood pressure measuring device and method described in this embodiment can automatically determine the type of cuff or the subject being measured, and adjust the pressure of the cuff 900 by providing a small inflation flow rate through an air pump without changing the orifice diameter of the deflation valve. This prevents the pressure rise rate within the small-sized cuff from being too rapid, making operation safer, and also prevents the pressure drop rate within the small-sized cuff from being too rapid, allowing the blood pressure measuring device to obtain a sufficient signal interval length to measure more accurate blood pressure values.

[0057] Furthermore, the blood pressure measuring device and method described in this embodiment can be adapted to different test subjects without changing the hardware components. Because test subjects have different limb sizes, the initial inflator time of the cuff 900 varies even with the same initial inflator rate. This embodiment allows for adjustment of the inflator and deflation times of the cuff 900, enabling the blood pressure measuring device to be used more safely and obtain more accurate blood pressure values ​​for different test subjects.

[0058] Please see Figure 1 In some embodiments, Figure 1 The pressure sensing circuit 114 senses the pressure value in the pressure band 900 and transmits the sensed pressure value (pressure waveform) to the filtering circuit 116. The filtering circuit 116 filters the pressure value (pressure waveform) in the pressure band 900 transmitted by the pressure sensing circuit 114 and transmits the filtered pressure value (pressure waveform) to the control chip 112. The control chip 112 analyzes the pressure value of the pressure band 900 based on the filtered pressure value (pressure waveform) and executes the above steps S210 to S250. The Bluetooth communication circuit 118 transmits the measurement results or pressure values ​​obtained by the control chip 112 to an electronic device (not shown in the figure) or a display device (not shown in the figure) for user operation or viewing.

[0059] The control circuit 110 can be a server, circuit, central processing unit (CPU), microprocessor (MCU), or other device with equivalent functions, including storage, calculation, data retrieval, receiving signals or messages, and transmitting signals or messages. Various functional components are disclosed herein. To those skilled in the art, functional components can be implemented by circuits (whether dedicated circuits or general-purpose circuits operating under the control of one or more processors and coded instructions).

[0060] Various functional components are disclosed herein. For those skilled in the art, these functional components can be implemented by circuits (whether dedicated circuits or general-purpose circuits operating under the control of one or more processors and coded instructions).

[0061] Although the present invention has been described above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be defined by the claims.

Claims

1. A blood pressure measuring device, characterized in that, include: An air pump for connection to a pressure band; A constant-speed venting valve is used to connect to the pressure pulse band; as well as A control circuit is connected to the air pump. When the control circuit determines that a depressurization time of the cuff needs to be adjusted based on an initial pressurization time, the control circuit controls the air pump to simultaneously inflate the cuff while the uniform depressurization valve depresses the cuff, thereby adjusting the depressurization time of the cuff. The initial pressurization time is the time it takes for the air pump to inflate the cuff to a preset pressure value at an initial pressurization rate. When the initial pressurization time is less than or greater than a pressurization time reference value, the control circuit adjusts or adds a blood pressure measurement mode of the blood pressure measuring device based on the initial pressurization time. After the control circuit adjusts or adds the blood pressure measurement mode, the initial pressurization time reference value is also adjusted to a value corresponding to the blood pressure measurement mode.

2. The blood pressure measuring device as described in claim 1, characterized in that, When the initial pressurization time is less than or greater than a pressurization time reference value, the control circuit is also used to determine that at least one of the initial pressurization time and the depressurization time needs to be adjusted.

3. The blood pressure measuring device as described in claim 1, characterized in that, The control circuit is also used to determine, when the initial pressurization time is less than or greater than a pressurization time reference value, a pressurization rate that needs to be adjusted to pressurize the pressure pulsation band and a depressurization rate that needs to depressurize the pressure pulsation band.

4. The blood pressure measuring device as described in claim 3, characterized in that, The control circuit is also used to adjust the pressurization rate so that the pressurization time of the pressure pulse is not less than the reference value of the pressurization time.

5. The blood pressure measuring device as described in claim 3, characterized in that, The initial pressurization rate corresponds to an initial pressurization current, wherein the pressurization rate corresponds to a pressurization current, and the pressurization current is 40% to 80% of the initial pressurization current.

6. The blood pressure measuring device as described in claim 1, characterized in that, The control circuit is also used to input an adjustment current to the air pump when it is determined that the pressure relief time length needs to be adjusted, so that the air pump can inflate the pressure pulsator at the same time the pressure pulsator is deflated through the uniform speed relief valve according to the adjustment current. The initial pressurization time corresponds to an initial pressurization current, and the adjustment current is 3% to 20% of the initial pressurization current.

7. The blood pressure measuring device as described in claim 1, characterized in that, When the initial pressurization time is less than a pressurization time reference value, the control circuit is also used to determine the need to adjust the depressurization time and the pressurization time of the pressure pulse band, wherein the adjusted depressurization time is at least 3 times the adjusted pressurization time.

8. The blood pressure measuring device as described in claim 1, characterized in that, Also includes: A quick-release valve is connected to the pressure band and the control circuit, wherein the quick-release valve is used to release air from the pressure band when the air pump inflates the pressure band at the initial pressurization rate and the pressure band reaches the preset pressure value.

9. A method for measuring blood pressure, characterized in that, A blood pressure measuring device is applicable, wherein the blood pressure measuring device includes a control circuit, an air pump, and a constant-speed deflation valve, wherein the blood pressure measuring method includes: In an initial operation, the air pump inflates a pressure band to a preset pressure value at an initial pressurization rate, and the control circuit obtains an initial pressurization time length. The control circuit determines whether to adjust the depressurization time of the pressure pulse band based on the initial pressurization time; and When it is determined that the pressure relief time needs to be adjusted, in a measurement operation, while the uniform speed venting valve is venting the pressure pulse band, the control circuit controls the air pump to simultaneously inflate the pressure pulse band, so as to adjust the pressure relief time of the pressure pulse band. When the initial pressurization time is less than or greater than a reference value for pressurization time, the control circuit adjusts or adds a blood pressure measurement mode of the blood pressure measuring device according to the initial pressurization time. After the control circuit adjusts or adds the blood pressure measurement mode, the reference value for the initial pressurization time is also adjusted to a value corresponding to the blood pressure measurement mode.

10. The blood pressure measurement method as described in claim 9, characterized in that, Also includes: When the initial pressurization time is less than or greater than a pressurization time reference value, the control circuit determines that at least one of the initial pressurization time and the depressurization time needs to be adjusted.

11. The blood pressure measurement method as described in claim 9, characterized in that, When the initial pressurization rate corresponds to an initial pressurization current, the pressurization rate corresponds to a pressurization current, wherein the pressurization current is 40% to 80% of the initial pressurization current.

12. The blood pressure measurement method as described in claim 9, characterized in that, Also includes: When it is determined that the depressurization time length needs to be adjusted, the control circuit inputs an adjustment current to the air pump, so that the air pump inflates the pressure band while the pressure band is depressurized through the uniform speed depressurization valve according to the adjustment current; wherein, the initial pressurization time length corresponds to an initial pressurization current, and the adjustment current is 3% to 20% of the initial pressurization current.

13. The blood pressure measurement method as described in claim 12, characterized in that, Also includes: The control circuit adjusts the pressurizing current input to the air pump to adjust the pressurizing time length so that the pressurizing time length is not less than the pressurizing time length reference value.

14. The blood pressure measurement method as described in claim 13, characterized in that, The adjusted depressurization time should be at least three times the adjusted pressurization time.

15. The blood pressure measurement method as described in claim 9, characterized in that, Also includes: In this measurement operation, the air pump inflates the pressure band to a measured pressure value at a pressurization rate, and the control circuit obtains the pressurization time length. The measured pressure value is the same as or similar to the preset pressure value, and the measured pressure value is adjusted according to a blood pressure measurement mode of the blood pressure measuring device.

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