TWI674879B - System, method and device for measuring blood pressure - Google Patents

Abstract

A blood pressure measurement method includes the following steps: obtaining a blood pressure pressure waveform of a blood pressure measurement performed on a measurer by a pressure band continuously pressurized to a preset pressure, the blood pressure pressure waveform is composed of a complex pulse wave curve; The blood pressure pressure waveform establishes the relationship between the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band; setting the pressure band to measure the blood pressure of the measurer under a first pressure to obtain a first pulse wave curve, And obtain the amplitude characteristic value of the first pulse wave curve, wherein the first pressure is less than the preset pressure; and obtain the measurement according to the amplitude characteristic value of the first pulse wave curve and the relational expression. The person measures the blood pressure information obtained under the first pressure, and outputs and displays the blood pressure information obtained by the measurement. The invention also provides a blood pressure measurement system and device.

Description

Blood pressure measurement system, method and device

The invention relates to a blood pressure measurement system, method and device.

Human blood pressure is a very important reference index for human health, especially for cardiovascular and cerebrovascular diseases. It is also an important basis for medical workers to diagnose diseases. Therefore, users often measure and master their own blood pressure for health care and disease prevention. Important means. Current sphygmomanometers generally use pressure bands to continuously increase the pressure to compress the arterial blood vessels and then gradually reduce the pressure, and then measure the pulsation caused by blood flow, record the change in pulsation size and the corresponding pressure. Since every measurement of blood pressure requires a pressurization and pressure relief, when the user needs to monitor blood pressure for a long time, frequent pressure relief will bring discomfort to the user's arm.

In view of this, it is necessary to provide a blood pressure measurement system, method and device, which can reduce the discomfort of users when performing continuous blood pressure measurement.

An embodiment of the present invention provides a blood pressure measurement method, including the steps of: obtaining a blood pressure pressure waveform of a blood pressure measurement performed on a measurer by a pressure band being continuously pressurized to a preset pressure, wherein the blood pressure pressure waveform is a complex pulse wave; A curve composition; establishing a relational expression between the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band according to the blood pressure pressure waveform; setting the pressure band at the first Performing blood pressure measurement on the measurer under pressure to obtain a first pulse wave curve, and obtaining an amplitude characteristic value of the first pulse wave curve, wherein the first pressure is less than the preset pressure; and according to the The amplitude characteristic value of the first pulse wave curve is converted with the relationship to obtain blood pressure information measured by the surveyor under the first pressure, and the blood pressure information obtained by the measurement is output and displayed.

An embodiment of the present invention further provides a blood pressure measurement system including a plurality of computer program instructions for being loaded and executed by a blood pressure measurement device to control the blood pressure measurement device to perform the following steps: obtaining a pressure band to continuously increase pressure to a preset value A blood pressure pressure waveform of a blood pressure measurement performed by a measurer under pressure, the blood pressure pressure waveform is composed of a plurality of pulse wave curves; the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band are established according to the blood pressure pressure waveform. Relationship; setting the pressure band to measure the blood pressure of the measurer under a first pressure to obtain a first pulse wave curve, and obtaining an amplitude characteristic value of the first pulse wave curve, wherein the first pressure Less than the preset pressure; and converting the blood pressure information measured by the measurer under the first pressure according to the amplitude characteristic value of the first pulse wave curve and the relational expression, and measuring the measured blood pressure Information is output and displayed.

An embodiment of the present invention further provides a blood pressure measurement device, including: a pressure band; an inflatable deflation module for pressurizing and releasing the pressure band; a memory for storing a plurality of computer program instructions; and processing And a device for loading the computer program instructions to perform the following steps: obtaining a blood pressure pressure waveform of a blood pressure measurement performed by the pressure band on a measurer under a constant pressure increase to a preset pressure, wherein the blood pressure pressure waveform is a complex pulse A wave curve composition; establishing a relational expression between the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band according to the blood pressure pressure waveform; setting the pressure band to measure the blood pressure of the measurer at a first pressure, Obtaining a first pulse wave curve, and obtaining an amplitude characteristic value of the first pulse wave curve, wherein the first pressure is less than the preset pressure; and according to the amplitude characteristic value of the first pulse wave curve and the Relation formula conversion obtains blood pressure information measured by the measurer under the first pressure, and outputs and displays the blood pressure information measured.

Compared with the conventional technology, the above-mentioned blood pressure measurement system, method, and device can continuously measure and convert blood pressure information under a pressure value by setting a pressure band, which can reduce user discomfort during long-term blood pressure measurement.

10‧‧‧ Power supply unit

20‧‧‧Air-deflation unit

30‧‧‧Pressure Band

40‧‧‧Pressure sensor

50‧‧‧ processor

60‧‧‧Memory

70‧‧‧Wireless communication unit

110‧‧‧First acquisition module

120‧‧‧Build Module

130‧‧‧Second Acquisition Module

140‧‧‧ Conversion Module

150‧‧‧ Calibration Module

FIG. 1 is a functional module diagram of a blood pressure measurement device according to an embodiment of the present invention.

FIG. 2 is a functional module diagram of a blood pressure measurement system according to an embodiment of the present invention.

3 is a blood pressure pressure waveform obtained by performing pressure relief measurement on a pressure band according to an embodiment of the present invention after continuously increasing pressure to a preset pressure.

FIG. 4 is a functional module diagram of a blood pressure measurement system according to another embodiment of the present invention.

FIG. 5 is a flowchart of steps in a blood pressure measurement method according to an embodiment of the present invention.

Please refer to FIG. 1. In one embodiment, a blood pressure measurement device 100 includes a power supply unit 10, an inflation and deflation unit 20, a pressure band 30, a pressure sensor 40, a processor 50, and a memory 60. The power supply unit 10 is used to provide a power signal to the blood pressure measurement device 100. The pressure band 30 can be worn on the upper arm of a person who is measuring. The processor 50 can control the inflation and deflation unit 20 to the pressure band. 30 for pressurizing or depressurizing, the pressure sensor 40 is used for sensing the pulsation of the measurement person, and transmitting the detected pulsation message to the processor 50.

In one embodiment, the blood pressure measurement device 100 further includes a wireless communication unit 70. The wireless communication unit 70 is configured to transmit blood pressure information measured by the blood pressure measurement device 100 to a display device for display. The wireless communication unit 70 may be a Bluetooth component, a 4G component, a ZigBee component, or the like. For example, the blood pressure measurement device 100 may be combined with a hospital bed, and the wireless communication unit 70 transmits the blood pressure information measured by the blood pressure measurement device 100 to a display of the hospital bed for display. In other embodiments of the present invention, the blood pressure measurement device 100 may also include a wired communication unit, and the blood pressure information measured by the blood pressure measurement device 100 is transmitted to a display device for display through the wired communication unit.

In one embodiment, the blood pressure measurement device 100 further includes a display unit (not shown), through which the measured blood pressure information can be displayed.

In one embodiment, the processor 50 may be a chip having a signal processing function, such as a single chip microcomputer, a microprocessor, and the like. The memory 60 may be a read-only memory or a random memory.

Referring to FIG. 2, the blood pressure measurement device 100 also runs a blood pressure measurement system 101. The blood pressure measurement system 101 includes at least a first obtaining module 110, a establishing module 120, a second obtaining module 130, and a conversion module 140. In this embodiment, the module is a programmable software instruction stored in the memory 60 and can be called and executed by the processor 50. It can be understood that, in other embodiments, the above module may also be a program instruction or firmware fixed in the processor 50.

The first obtaining module 110 is used for obtaining a blood pressure pressure waveform of a blood pressure measurement performed by the pressure band 30 on a measurement person under a constant pressure increase to a preset pressure, and the blood pressure pressure waveform is composed of a complex pulse wave curve.

In one embodiment, the blood pressure pressure waveform is preferably a blood pressure pressure waveform obtained by performing a complete resonance blood pressure measurement through the blood pressure measurement device 100. Specifically, when measuring the blood pressure of the measurer, the inflation and deflation unit 20 inflates the pressure band 30 to squeeze the artery completely to stop the blood flow, and then slowly releases the pressure (for example, about 3mmHg each time). The detector 40 detects the pulsation of the artery and continues to slowly release the pressure in the pressure band 30. The pulsation gradually increases. When the pressure in the pressure band 30 is equal to the average arterial pressure, the pulsation amplitude in the pressure band 30 is the largest. Decreasing makes the intravascular obstacle area smaller, the jet effect gradually becomes smaller and the pulsation amplitude becomes smaller, until the pressure band 30 cannot detect the pulsation.

FIG. 3 is a schematic diagram of the blood pressure pressure waveform. The blood pressure pressure waveform is composed of a plurality of pulse wave curves. Each pulse wave curve is substantially a triangular wave. Each pulse wave curve has a maximum amplitude and a minimum amplitude. The average amplitude of each pulse wave curve can be calculated from the maximum amplitude and the minimum amplitude (for example, averaging the maximum amplitude and the minimum amplitude). In FIG. 3, the blood pressure waveform is a waveform chart from the pressure band 30 being inflated to the compression of the artery to completely stop the blood flow, and then the pressure is slowly released until the pulsation cannot be detected. S1 in FIG. 3 is a pressure waveform of pressure relief in the pressure band 30, and S2 is a maximum amplitude of the pressure band 30 at the current pressure value. When the pressure band 30 is released to a pressure equal to the average arterial pressure, it corresponds to the maximum amplitude Va0, the average amplitude Vb0, and the minimum amplitude Vc0. When the pressure band 30 is released to a pressure equal to the minimum pressure at which the pulse pressure can be detected, it Corresponding to the maximum amplitude Vae, the average amplitude Vbe and the minimum amplitude Vce.

In one embodiment, when a maximum amplitude is sensed by the pressure band 30, the pressure in the pressure band 30 is approximately equal to the average arterial pressure, and then the maximum amplitude is used as the center to find the amplitude of about 50 with the maximum amplitude forward. %, At this time, the pressure in the pressure band 30 is approximately equal to the systolic pressure, and then the maximum amplitude is used as the center to find out that the vibration is about 75% of the maximum amplitude. At this time, the pressure in the pressure band 30 is approximately equal to the diastolic pressure.

The establishing module 120 is configured to establish a relationship between the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band 30 according to the blood pressure pressure waveform.

In one embodiment, the amplitude characteristic value of the pulse wave curve includes a maximum amplitude and an average amplitude of the pulse wave curve. The establishing module 120 establishes a relationship between the maximum amplitude of the pulse wave curve and the pressure applied by the pressure band 30 according to the blood pressure pressure waveform, and establishes the average amplitude of the pulse wave curve and the pressure band according to the blood pressure pressure waveform. 30 Relationship of applied pressure. In other embodiments, the amplitude characteristic value of the pulse wave curve may also include a maximum amplitude, a minimum amplitude value, and an average amplitude of the pulse wave curve.

In one embodiment, the relationship between the maximum amplitude (X1) of the pulse wave curve and the pressure (y1) applied by the pressure band 30 is: ----- Hereinafter referred to as the first relationship; the relationship between the average amplitude (X2) of the pulse wave curve and the pressure (y2) applied by the pressure band is: ----- Hereinafter referred to as the second relational expression; where M0 is the average arterial pressure in the blood pressure pressure waveform, and L0 is the minimum pressure in the blood pressure pressure waveform (the pulse wave curve can be generated in the blood pressure pressure waveform) (Minimum pressure), Va0 is the maximum amplitude of the pulse wave curve corresponding to the average arterial pressure, Vae is the maximum amplitude of the pulse wave curve corresponding to the minimum pressure, and Vb0 is the average of the pulse wave curve corresponding to the average arterial pressure. Amplitude, Vbe is the average amplitude of the pulse wave curve corresponding to the minimum pressure.

The second obtaining module 130 sets the pressure band 30 to measure the blood pressure of the surveyor under a first pressure to obtain a first pulse wave curve, and obtains an amplitude characteristic value of the first pulse wave curve. The first pressure is less than the preset pressure.

In an embodiment, the first pressure is preferably a minimum pressure in the blood pressure pressure waveform that can generate a pulse wave curve. The first pressure is preferably set to a pressure value for a long-term blood pressure measurement of the subject. A small value of pressure can alleviate the discomfort of the person measuring the blood pressure for a long time. The amplitude characteristic value of the first pulse wave curve includes a maximum amplitude and an average amplitude of the first pulse wave curve. In other embodiments of the present invention, the first pressure may be a minimum pressure for generating a pulse wave curve plus a preset value.

In one embodiment, in order to further reduce the discomfort of the measurement person in measuring the blood pressure for a long time, the blood pressure measurement device 100 adjusts the pressure of the pressure band 30 at a preset time to continuously measure the blood pressure of the measurement person. Measurement. For example, the blood pressure measurement device 100 adjusts the pressure of the pressure band 30 every half an hour. The initial pressure of the pressure band 30 is equal to the minimum pressure in the blood pressure pressure waveform that can generate a pulse wave curve. The pressure is half an hour later. The pressure of the belt 30 is adjusted to the minimum pressure + 5mmHg, and the pressure of the belt 30 is adjusted to the minimum pressure after another half an hour.

The conversion module 140 is based on the amplitude characteristic value of the first pulse wave curve and the The relationship formula established by the establishing module 120 converts the blood pressure information measured by the surveyor under the first pressure, and outputs the measured blood pressure information.

In one embodiment, the blood pressure information includes systolic blood pressure, mean arterial blood pressure, and diastolic blood pressure. The conversion module 140 obtains the first systolic pressure and the first average pulsatile pressure of the measurer according to the blood pressure pressure waveform. The first average pulsating pressure is the pressure corresponding to the pressure band 30 when the blood pressure pressure waveform has the maximum amplitude, and then centering on the maximum amplitude, find out that the amplitude is about 50% of the maximum amplitude at this time. The pressure in the pressure band 30 is the first systolic pressure.

In one embodiment, the conversion module 140 obtains the measurement person under the first pressure according to the maximum amplitude of the first pulse wave curve, the first relationship, and the first systolic pressure. Measured systolic pressure; the conversion module 140 also converts the measurer to the first according to the average amplitude of the first pulse wave curve, the second relationship, and the first average arterial pressure. The average pulsatile pressure measured under pressure; the conversion module 140 also converts the measurer to measure under the first pressure according to the systolic pressure and average arterial pressure measured by the measurer under the first pressure Get the diastolic pressure.

In one embodiment, the systolic blood pressure, the mean arterial blood pressure, and the diastolic blood pressure have the following relationship: mean arterial blood pressure = 1/3 * systolic blood pressure + 2/3 * diastolic blood pressure. The systolic pressure measured by the measurer under the first pressure can be calculated by the following relationship: ; The average pulsating pressure measured by the measurer under the first pressure is calculated by the following relationship: . Where Vax is the maximum amplitude of the first pulse wave curve, Vbx is the average amplitude of the first pulse wave curve, Va1 is the amplitude calculated by substituting the first pressure value into the first relational expression, and Vb1 is the The first pressure value is substituted into the amplitude calculated by the second relationship, S0 is the first systolic pressure, and M0 is the first mean arterial pressure.

Referring to FIG. 4, compared with FIG. 2, the blood pressure measurement system 101 further includes a correction module 150. The correction module 150 uses a judgment relationship And / or relationship Whether it is greater than a preset value to determine whether the calibration mode needs to be activated. If the relationship And / or the relationship When it is larger than the preset value, it indicates that the current conversion error is large, and the correction module 150 determines that the correction mode needs to be started, otherwise it is not necessary to start the correction mode. When the calibration module 150 determines that the calibration mode needs to be started, the first obtaining module 110 re-obtains the blood pressure pressure of the blood pressure measurement performed by the pressure belt 30 on the measurer under continuous pressure increase to a preset pressure. Waveform, the establishment module 120 establishes a relationship between the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band 30 according to the blood pressure pressure waveform reacquired by the first acquisition module 110, and the conversion module 140 according to the first The amplitude characteristic value of the first pulse wave curve under pressure is converted to a re-established relationship to obtain blood pressure information measured by the surveyor under the first pressure.

FIG. 5 is a flowchart of a blood pressure measurement method according to an embodiment of the present invention. This method can be used in the blood pressure measurement device 100 shown in Figs.

In step S500, the first obtaining module 110 is used to obtain a blood pressure pressure waveform of a blood pressure measurement performed by the pressure band 30 on a measurer under a constant pressure increase to a preset pressure, and the blood pressure pressure waveform is composed of a complex pulse wave curve. .

In step S502, the establishing module 120 is configured to establish a relational expression of the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band 30 according to the blood pressure pressure waveform.

In step S504, the second acquisition module 130 sets the pressure band 30 to measure the blood pressure of the surveyor under the first pressure to obtain a first pulse wave curve, and acquires the amplitude characteristics of the first pulse wave curve. value. The first pressure is less than the preset pressure.

In step S506, the conversion module 140 converts the blood pressure information measured by the surveyor under the first pressure according to the relationship between the amplitude characteristic value of the first pulse wave curve and the relationship established by the establishment module 120, and The measured blood pressure information is output and displayed.

In the blood pressure measurement system, method and device described above, during long-term blood pressure monitoring, a pressure value is continuously given to the pressure band, and the blood pressure is continuously estimated. The pressure value given to the pressure band can be changed every It can be changed at a preset time to further reduce the discomfort of wearing a pressure band for long-term blood pressure measurement.

In summary, the present invention complies with the elements of an invention patent, and a patent application is filed in accordance with the law. However, the above are only the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments. For example, those who are familiar with the technology of this case make equivalent modifications or changes according to the spirit of the present invention It should be covered by the following patent applications.

Claims (10)

A blood pressure measurement method includes the following steps: obtaining a blood pressure pressure waveform of a blood pressure measurement performed on a measurer by a pressure band continuously pressurized to a preset pressure, the blood pressure pressure waveform is composed of a complex pulse wave curve; The blood pressure pressure waveform establishes the relationship between the amplitude characteristic value of the pulse wave curve and the pressure applied by the pressure band; setting the pressure band to measure the blood pressure of the measurer under a first pressure to obtain a first pulse wave curve, And obtain the amplitude characteristic value of the first pulse wave curve, wherein the first pressure is less than the preset pressure; and obtain the measurement according to the amplitude characteristic value of the first pulse wave curve and the relational expression. The person measures the blood pressure information obtained under the first pressure, and outputs and displays the blood pressure information obtained by the measurement. The blood pressure measurement method according to item 1 of the patent application range, wherein the amplitude characteristic value of the pulse wave curve includes the maximum amplitude of the pulse wave curve and the average amplitude of the pulse wave curve, and the average of the pulse wave curve The amplitude is obtained by converting the maximum amplitude of the pulse wave curve and the minimum amplitude of the pulse wave curve. The blood pressure measurement method according to item 2 of the scope of patent application, wherein the step of establishing a relationship between an amplitude characteristic value of a pulse wave curve and a pressure applied by the pressure band according to the blood pressure pressure waveform includes: according to the blood pressure The relationship between the maximum amplitude of the pulse wave curve and the pressure applied by the pressure band is established by the pressure waveform; and the relationship between the average amplitude of the pulse wave curve and the pressure applied by the pressure band is established according to the blood pressure pressure waveform. The blood pressure measurement method according to item 3 of the scope of patent application, wherein the relationship between the maximum amplitude of the pulse wave curve and the pressure applied by the pressure band is: ; And the relationship between the average amplitude of the pulse wave curve and the pressure applied by the pressure band is: Where M0 is the average arterial pressure in the blood pressure pressure waveform, L0 is the minimum pressure in the blood pressure pressure waveform, Va0 is the maximum amplitude of the pulse wave curve corresponding to the average arterial pressure, and Vae is the minimum pressure corresponding The maximum amplitude of the pulse wave curve, Vb0 is the average amplitude of the pulse wave curve corresponding to the average arterial pressure, and Vbe is the average amplitude of the pulse wave curve corresponding to the minimum pressure. The blood pressure measurement method according to item 3 or 4 of the scope of the patent application, wherein the blood pressure information includes systolic blood pressure, mean arterial pressure, and diastolic blood pressure, and the amplitude characteristic value according to the first pulse wave curve and the The step of converting the relationship to obtain the blood pressure information measured by the measurer under the first pressure includes: obtaining the first systolic pressure and the first average pulsation pressure of the measurer according to the blood pressure pressure waveform; The relationship between the maximum amplitude of the first pulse wave curve, the maximum amplitude of the pulse wave curve, and the pressure applied by the pressure band, and the first systolic pressure is converted into the first pressure of the measurer. The systolic pressure obtained by the following measurement; obtained by converting the average amplitude of the first pulse wave curve, the relationship between the average amplitude of the pulse wave curve and the pressure applied by the pressure band, and converting the first average pulse pressure Obtaining the average pulsatile pressure measured by the measurer under the first pressure; and converting the measurer according to the systolic pressure and average arterial pressure measured by the measurer under the first pressure The first pressure of the diastolic blood pressure measured. The blood pressure measurement method according to item 5 of the scope of patent application, wherein the systolic blood pressure, the average arterial blood pressure, and the diastolic blood pressure have the following relationship: average arterial blood pressure = 1/3 * systolic blood pressure + 2/3 * Diastolic pressure The systolic pressure measured by the measurer under the first pressure is calculated by the following relationship: ; And the average pulsating pressure measured by the measurer under the first pressure is calculated by the following relationship: Wherein, Vax is the maximum amplitude of the first pulse wave curve, Vbx is the average amplitude of the first pulse wave curve, and Va1 is the maximum amplitude of the first pressure substituted into the pulse wave curve and the pressure applied by the pressure band. Amplitude calculated from the relationship formula, Vb1 is the amplitude calculated from the relationship between the average amplitude of the first pressure substituted into the pulse wave curve and the pressure applied by the pressure band, and S0 is the measurement displayed by the blood pressure pressure waveform The first systolic blood pressure of the subject, M0 is the first mean arterial pressure of the subject displayed by the blood pressure pressure waveform. The blood pressure measurement method according to item 6 of the patent application scope, further comprising: a judgment relational expression And / or relationship Whether it is greater than a preset value; if the relationship is And / or the relationship Greater than the preset value, re-obtaining a blood pressure pressure waveform of the blood pressure measurement performed on the measurer by the pressure band being continuously pressurized to a preset pressure; and establishing a pulse wave curve based on the retrieved blood pressure pressure waveform The relationship between the amplitude characteristic value and the pressure applied by the pressure band. The blood pressure measurement method according to item 1 of the patent application range, wherein the first pressure is a minimum pressure in the blood pressure pressure waveform that can generate a pulse wave curve, and the method further includes: adjusting the pressure band at a preset time Pressure to perform continuous blood pressure measurements on the subject. A blood pressure measurement system includes a plurality of computer program instructions for being loaded and executed by a blood pressure measurement device to control the blood pressure measurement device to execute the blood pressure measurement method according to any one of claims 1 to 8. A blood pressure measuring device includes: a pressure band; an inflatable deflation module for pressurizing and releasing the pressure band; A memory for storing a plurality of computer program instructions; and a processor for loading the computer program instructions to execute the blood pressure measurement method according to any one of claims 1 to 8.