TWI650102B - Blood pressure measuring device with pressure pulse band and method of operating same - Google Patents

Abstract

The utility model relates to a blood pressure measuring device with a blood pressure band, which comprises a blood pressure band, a pressure change regulating unit, a signal recording and storage unit, and a calculation and analysis unit. The pressure change regulating unit can control the pressure in the pressure pulse band. The signal recording and storage unit can capture and store a pressure oscillation waveform in the pressure pulse band. When the pressure in the pressure pulse band increases, if the calculation and analysis unit confirms that the pressure oscillation waveform has a plurality of continuous pulse waveform signals and that a plurality of characteristic values meet a specific condition, the pressure change regulating unit continues to increase the pressure The pressure in the vein.

Description

Blood pressure measuring device with pressure pulse belt and operation method thereof

The present invention relates to a blood pressure measuring device with a blood pressure band and a method for operating the same.

Generally, an electronic blood pressure meter (electronic sphygmomanometer) is used to measure the blood pressure of an artery. The blood pressure measuring cuff is wound and fixed on the upper arm or wrist, and the pressure cuff is pressurized and decompressed. When the pressure cuff is inflated and pressurized and deflated to reduce the pressure, the volume of the compressed blood vessel changes. The technique of calculating the blood pressure from the amplitude change of the pressure cuff is called the oscillometric method. .

As mentioned above, in the electronic sphygmomanometer using the oscillometric method, when the pressure of the pressure cuff fixed to the upper arm or wrist changes, the amplitude of the pressure cuff changes due to the change in the volume of the blood vessel. . In addition, even in the case of a pressure vessel with the same pressure, when the volume of the blood vessel changes, the amplitude of the pressure vessel fluctuation may change.

If the winding force (devil felt) used to fix the venous belt is not sufficient, the blood vessel is not actually pressed when the venous belt is pressurized, and the blood flow in the blood vessel can not be effectively closed. Poor accuracy. Even during pressurization, if the state of the blood pressure band is improperly changed (for example, the devil felt joint surface is relatively loose or moved), the blood pressure measurement to be performed during pressurization will be quite inaccurate. Therefore, after the blood pressure cuff is wound around the body to be measured, it needs to be fixed securely and properly, so that the value of blood pressure measurement can be correctly obtained.

Traditional electronic sphygmomanometer confirms whether the blood pressure band around the test site is passing Tight, proper, or too loose, it is mostly judged by detecting the pressure change in the pressure band during pressurization. Figure 1 is a schematic diagram showing the relative relationship between the pressure change and the degree of entanglement in the pressure vein band. The straight line A in the figure indicates that the pressure pulse band is too tightly wound around the part to be measured, so the pressure in the pressure pulse band detected during the pressurization has a larger slope with time. For example, when the slope exceeds an upper threshold value, it can be judged that the winding degree of the pressure vein belt is too tight. Compared with the straight line A, the straight line C indicates that the pressure vein band is too loosely wound around the part to be measured, so the pressure in the pressure vein band detected during the pressurization has a smaller slope with time. For example: when the slope is less than the lower threshold, it can be judged that the entanglement of the pressure vein belt is too loose. When the pressure pulse band is properly wound around the part to be measured, the slope of the pressure in the pressure pulse band with time as shown by the straight line B in the figure is better.

Although the above-mentioned traditional method for confirming the degree of entanglement of the pressure pulse band can exclude some improper use conditions that are too loose or too tight, only the pressure in the pressure pulse band is still insufficient. For example: when the pressure pulse band is wrapped around the hand shaft or wrist joint, or even as a toy and wrapped around the cylindrical part of the furniture, even if the pressure pulse band is wound, it will not be too loose or too tight, but the internal The slope of pressure over time is likely to fall within an acceptable range. That is, the traditional method of confirming the degree of entanglement of the blood pressure band is not optimal, and the value of blood pressure measurement may still not be obtained correctly.

In view of the problems encountered in the foregoing prior art, the present invention proposes a method for operating a blood pressure measurement device, and a blood pressure measurement device capable of ensuring that blood pressure is accurately measured using the method.

The present application provides a method for operating a blood pressure measurement device, which is based on a change in a pulse waveform signal in a pressure oscillometric waveform, thereby determining the degree of entanglement of the pressure pulse band, so as to be correct Ground pressure measurement.

The present application provides a blood pressure measuring device with a blood pressure belt. The device can detect the pressure vibration waveform of the blood pressure belt during pressurization, and adjust the pressure rate of the blood pressure belt according to the actual pressure vibration waveform. Adapt to the softness of the part to be measured (fat and muscle group Weaving distribution) and circumference length (thick or fine), so that the energy can measure the better blood pressure value of the site to be measured.

The present application provides a blood pressure measuring device with a blood pressure band, which can detect the pressure oscillation waveform of the blood pressure band during pressurization, and interrupts the pressure of the blood pressure band according to the actual pressure oscillation waveform, so as to avoid improper execution. Blood pressure measurement is a waste of time.

Therefore, the present invention proposes an embodiment of a blood pressure measurement device with a pressure pulse belt, comprising: a pressure pulse belt; a pressure change regulating unit that can control the pressure in the pressure pulse belt; a signal recording and storage unit Can capture and store a pressure oscillation waveform in the pressure pulse band; and an operation and analysis unit, wherein when the pressure in the pressure pulse band increases, if the operation and analysis unit confirms that the pressure oscillation waveform has a plurality of continuous The plurality of characteristic values of the pulse waveform signal satisfy a specific condition, and then the pressure change regulating unit continuously increases the pressure in the pressure pulse band.

In another embodiment, the specific condition is that the amplitudes are strictly increased in sequence and are both greater than a threshold value.

In another embodiment, the characteristic values are a first slope and a second slope formed by adjacent peaks in the plurality of continuous pulse waveforms, and the specific condition defines the first slope and the second slope Departments are strictly increasing in order.

In another embodiment, the blood pressure measurement device is used to measure the blood pressure of a wrist artery. The blood pressure measurement device for the wrist further includes an acceleration sensor, and the calculation and analysis unit calculates an inclination angle of the blood pressure measurement device according to an output signal of the acceleration sensor, and converts the blood pressure measurement device according to the inclination angle. Height of blood pressure measuring device. The arithmetic and analysis unit judges whether the blood pressure measurement device is placed at a level with the heart according to the height.

Another embodiment of the present invention provides a method for operating a blood pressure measurement device, including: providing a blood pressure measurement device with a pressure pulse band; capturing a pressure oscillation waveform in the pressure pulse band; and When the pressure is increased, if it is confirmed that the pressure oscillation waveform has a plurality of continuous pulse waveform signals and a plurality of characteristic values satisfy a specific condition, the pressure in the pressure pulse band is continuously increased.

20‧‧‧ blood pressure measuring device

21‧‧‧Body

22‧‧‧ Pressure Vessel Band

23‧‧‧air pipe

30‧‧‧ blood pressure measuring device

31‧‧‧pressure vein belt

32‧‧‧Signal record and storage unit

33‧‧‧Pressure change control unit

34‧‧‧ Computing and Analysis Unit

40‧‧‧Pressure Oscillation Waveform

80‧‧‧ users

81‧‧‧ upper arm

211‧‧‧Display

212‧‧‧operation panel

213‧‧‧ sound generator

A ~ C‧‧‧Straight

S‧‧‧Pressure Oscillation Waveform

T ₁ ~ T ₉ ‧‧‧ period

Tp _1-2 ~ Tp _8-9 ‧‧‧

D1, D2‧‧‧ Difference

L1, L2‧‧‧Straight

P1 ~ P9‧‧‧peak

Amp1, Amp2, Amp3‧‧‧Amplitude

Figure 1 shows the relative relationship between the pressure change and the degree of entanglement in the pressure vein band. The schematic.

FIG. 2 is a schematic diagram of a blood pressure measurement device with a blood pressure cuff for the upper arm of the first embodiment of the present application.

FIG. 3 is a block diagram showing a blood pressure measuring device with a pressure band in the first embodiment of the present application.

FIG. 4 is a schematic diagram showing a pressure oscillation waveform of the first embodiment of the present application.

FIG. 5 is a schematic diagram of a blood pressure measurement device with a wrist pressure cuff according to a second embodiment of the present application.

Hereinafter, various embodiments for carrying out the present invention will be described. Please refer to the accompanying drawings and their corresponding descriptions. In this specification and the drawings, the same reference numerals are given to substantially the same or identical components, and redundant descriptions are omitted.

FIG. 2 is a schematic diagram of a blood pressure measurement device with a blood pressure cuff for the upper arm of the first embodiment of the present application. As shown in FIG. 2, the blood pressure measurement device 20 includes a main body portion 21, a blood pressure band 22, and an air tube 23. The main body portion 21 is provided with a pressure change regulating unit (not shown), such as an air pump or an air pump, and the pressurized gas passes through the air pipe 23 and enters the pressure pulse belt 22. There are integrated circuit elements inside the body portion 21 which will capture a pressure oscillation waveform in the pressure pulse band 22 through the air tube 23 and analyze the characteristic value of the pressure oscillation waveform to determine whether the pressure pulse band 22 is properly wound around The user 80 has an upper arm 81 but is not limited thereto. Those skilled in the art should know that it can also be used to determine whether the pressure cuff 22 is properly wrapped around the lower limb of the user 80.

Furthermore, the main body portion 21 includes a display 211, an operation panel 212, and a sound generator 213. When the blood pressure band 22 is determined to be improperly wrapped around the upper arm 81, the display 211 and / or the sound generator 213 will issue a warning signal (text, pattern or special sound) to inform the user that the current blood pressure level should be interrupted Testing process. Usually, the operation panel 212 is provided with a power button, a start button, an interrupt button, etc., but this application is not limited to these function buttons system. After the display 211 and / or the sound generator 213 of the main body portion 21 issues an alarm, the user 80 can press the interrupt button to stop the pressure pulse band 22 from being continuously inflated. Those skilled in the art should know that the integrated circuit elements inside the main body portion 21 can also control the pressure change regulating unit to stop inflation.

FIG. 3 is a block diagram showing a blood pressure measuring device with a pressure band in the first embodiment of the present application. The blood pressure measurement device 30 includes a blood pressure cuff 31, a signal recording and storage unit 32, a pressure change regulating unit 33, and a calculation and analysis unit 34, wherein the signal record and storage unit 32 and the calculation and analysis unit 34 Can be integrated into a single integrated circuit element. In other embodiments, the signal recording and storage unit 32 and the operation and analysis unit 34 can also perform sub-unit function processing by a plurality of integrated circuit chip components, so they are not limited by the examples of this embodiment and the drawings. . In addition, those with ordinary knowledge in the technical field of the present invention should know that the storage function in the signal recording and storage unit 32 may be a memory.

The pressure cuff 31 is used for fixing to the arm or wrist of the user. The signal recording and storage unit 32 retrieves the pressure oscillation waveform S in the pressure pulse band 31 and stores the pressure oscillation waveform S. In this embodiment, the pressure oscillation waveform may be a Pulse Volume Recording (PVR) waveform.

The pressure change regulating unit 33 can control the pressure increase, pressure maintenance, or pressure reduction in the pressure pulse belt 31. The calculation and analysis unit 34 analyzes the signal characteristics of the pressure oscillation waveform to determine whether the pressure pulse band 31 is properly wrapped around the upper arm or the wrist. If it is determined that the pressure pulse band 31 is properly wound, the pressure change regulating unit continuously increases the pressure in the pressure pulse band. Conversely, if it is determined that the blood pressure belt 31 is improperly wound, the calculation and analysis unit 34 will output a signal to cause the blood pressure measurement device 30 to issue a warning signal. The user 80 may decide to stop the pressure pulse band 22 from continuing to be inflated according to the warning signal.

As described above, the operation and analysis unit 34 analyzes the signal characteristic value of the pressure oscillation waveform, and the characteristic value is the intensity (for example, amplitude) of the waveform signal and / or the slope formed between the peaks of each periodic waveform.

FIG. 4 is a schematic diagram showing a pressure oscillation waveform of the first embodiment of the present application, in which two conditions for judging that the pressure pulse belt 31 is properly wound are exemplified, but the present application is not limited by these conditions. The pressure oscillation waveform 40 includes a plurality of continuous pulse waveform signals, and the pulse waveform signals occur at periods T ₁ to T _{9, respectively} . As the pressure in the cuff increases, the volume of the blood vessels in the upper arm changes accordingly, which causes the maximum amplitude of the cuff to change significantly in each cycle. The peak points P1 to P9 in the figure are where the peak value (maximum value) of the pulse waveform signal in each cycle occurs.

The amplitudes (or amplitudes) corresponding to the peak points P1 to P3 are amplitude Amp1, amplitude Amp2, and amplitude Amp3, respectively. The first straight line L1 passes through P1 and P2 and the second straight line L2 passes through the peak point P2 and the peak point P3. The amplitude Amp2 and the amplitude Amp1 are subtracted to a difference D1, and the amplitude Amp3 and the amplitude Amp2 are subtracted to a difference D2. The occurrence period of peak point P1 to peak point P2 in the waveform is Tp _1-2 , the occurrence period of peak point P2 to peak point P3 is Tp _2-3 , and the remaining Tp _3-4 to Tp _8-9 and so on. When the continuous pulse waveform signal occurring in the period T ₁ to T ₃ meets any one of the following specific conditions, it can be judged that the pressure pulse belt 31 is properly wound:

Condition 1: S2> S1, where S1 = D1 / Tp _1-2 (the first slope S1 is the slope of the first straight line L1); S2 = D2 / Tp _2-3 (the second slope S2 is the slope of the second straight line L2) ; D1 = Amp2-Amp1; D2 = Amp3-Amp2.

Condition two: Amp1> 30; Amp2> 30; Amp3> 30.

In addition, in other embodiments, the number of continuous pulse waveform signals may be more than three, or occur in other continuous cycles, but the above-mentioned slope condition of this application must be gradually increasing, and the above-mentioned amplitude must exceed a threshold value (threshold value), such as 30. The threshold value mentioned here is 30, which is only for the convenience of explanation. When it depends on the actual design situation, it is not limited.

FIG. 5 is a schematic diagram of a blood pressure measurement device with a wrist pressure cuff according to a second embodiment of the present application. The technical content described in the aforementioned first embodiment is also applicable to this embodiment, that is, the blood pressure measurement device 50 of this embodiment includes a calculation and analysis unit (not shown) that analyzes the signal characteristics of the pressure oscillation waveform. The characteristic value of the signal is the signal strength (for example: amplitude) and / or the slope formed between the peaks of each periodic waveform. Those skilled in the art should know that the signal strength and equivalent changes of the multiple peaks are within the scope of the present invention. However, the second embodiment further includes an acceleration sensor (gravity sensor or G sensor) 514, so that the inclination angle θ of the body portion 51 can be sensed. The blood pressure measurement device 50 fixed to the wrist will affect the signal strength due to the height difference between the wrist and the heart. For example, if the wrist is lifted higher than the head, the signal strength will decrease or the wrist flat on the table will cause the signal strength. Higher, so combining the signal strength and tilt angle θ is more It can be determined that the height of the blood pressure measuring device 50 is correct, and thus the accuracy of the blood pressure measurement can be ensured.

Specifically, the blood pressure measurement device 50 is used to measure the blood pressure of the wrist artery, and includes a main body portion 51 and a blood pressure band 52. For the internal circuit architecture and surface setting elements of the body portion 51, reference may be made to the description of the previous embodiment. When using the blood pressure measurement device 50 to measure blood pressure, it is recommended to lift the wrist around the blood pressure measurement device 50 and make it the height about the same as or close to the height of the heart. Therefore, a more accurate Blood pressure value. In addition to using the aforementioned method to confirm that the pressure pulse band 52 is properly wound, it is also desirable that the body portion 51 is placed at the same height as the heart, so that the correctness of the blood pressure measurement can be ensured. This embodiment uses an acceleration sensor (gravity sensor or G sensor) 514 by which the inclination angle θ of the body portion 51 can be sensed, and the height of the blood pressure measurement device 50 can be calculated and converted from the inclination angle θ. In this way, you can confirm whether it is as high as the heart, so that you can measure the blood pressure value correctly. It is specifically explained here that when the user performs improper operations, such as raising his head or lowering his arms over the waist, etc., so that the blood pressure measurement device 50 is not at the same height as the heart position, the height and signal strength at this time are incorrect, and blood pressure The measurement device 50 immediately displays an error message or forcibly stops measuring the blood pressure.

The technical content and technical features of the present invention have been disclosed as above. However, those skilled in the art may still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to those disclosed in the embodiments, but should include various substitutions and modifications that do not depart from the present invention, and are covered by the following patent application scope.

Claims (10)

A blood pressure measuring device with a pressure pulse belt includes: a pressure pulse belt; a pressure change regulating unit that can control the pressure in the pressure pulse belt; a signal recording and storage unit that can capture and store the pressure pulse A pressure oscillation waveform in the band; and an operation and analysis unit, wherein when the pressure in the pressure pulse band increases, if the operation and analysis unit confirms that the pressure oscillation waveform has a plurality of continuous pulse waveform signals, a plurality of characteristic values When a specific condition is satisfied, the pressure change regulating unit continuously increases the pressure in the pressure pulse band. The blood pressure measuring device with a blood pressure cuff according to claim 1, wherein the characteristic values are a plurality of amplitudes, and the specific condition defines that the amplitudes are strictly increased in sequence and are greater than any of a threshold value . The blood pressure measuring device with a pressure pulse belt according to claim 1, wherein the characteristic values are a first slope and a second slope formed by adjacent peak points in the plurality of continuous pulse waveforms, and the specific condition is It is defined that the first slope and the second slope are strictly increased sequentially. The blood pressure measuring device with a pressure pulse belt according to claim 2, wherein the number of the plurality of continuous pulse waveform signals is three, and the amplitudes of the three pulse waveform signals are all greater than 30. The blood pressure measurement device with a blood pressure cuff according to claim 1, further comprising an acceleration sensor, the calculation and analysis unit calculates the inclination angle of the blood pressure measurement device according to the output signal of the acceleration sensor, and The height of the blood pressure measuring device is converted according to the tilt angle. The blood pressure measurement device with a blood pressure cuff according to claim 5, wherein the arithmetic and analysis unit judges whether the blood pressure measurement device is placed at a level high with the heart according to the height. A method for operating a blood pressure measurement device includes: providing a blood pressure measurement device with a pressure pulse band; capturing a pressure oscillation waveform in the pressure pulse band; and when the pressure in the pressure pulse band increases, The pressure oscillation waveform has a plurality of continuous pulse waveform signals, and a plurality of characteristic values satisfy a specific condition, and the pressure in the pressure pulse band is continuously increased. The method for operating a blood pressure measurement device according to claim 7, wherein the characteristic values are a plurality of amplitudes, and the specific condition defines that the amplitudes are strictly increased in sequence and are greater than any one of a threshold value. The method for operating a blood pressure measurement device according to claim 7, wherein the characteristic values are a first slope and a second slope formed by adjacent peak points in the plurality of continuous pulse waveforms, and the specific condition defines the The first slope and the second slope are strictly increased sequentially. The method for operating a blood pressure measurement device according to claim 7, wherein the blood pressure measurement device further includes an acceleration sensor, and the method further includes calculating a tilt of the blood pressure measurement device according to an output signal of the acceleration sensor. Angle, and the step of converting the height of the blood pressure measuring device according to the tilt angle.