TW576727B - Pulse-type method for measuring blood pressure and the device - Google Patents

Abstract

The present invention relates to a pulse-type method for measuring blood pressure and the device. A stage-wise pressurization/depressurization process is used to obtain the diastolic pressure and the means aortic pressure (MAP). Meanwhile, the pulse wave is used to determine the systolic pressure. A device according to the present invention uses the measured MAP as a basis to reduce the loading pressure of the cuff during pressurization, thereby achieving the effects of comfort, fast, power saving, and accurate blood pressure measurement.

Description

576727 Blood test pressure My muscles and beats the same bag called Drcl, the listener once explained the invention (1) The scope of the creation] This creation is about a pulse wave (〇sci 1 1 〇metric) method of pressure ^ and The device is particularly a blood pressure measurement method and device for taking pulse waves (pu 1 sewave) generated from the pulses of the sect and the yamsam ginseng to determine the measurement to achieve comfortable and accurate measurement. . Background of the creation] The human heart is a pulsating tube, and the blood will be intermittently pressed into the arteries with each time / v > periodic contraction (c ο ntract), forming an irregular waveform of pressure in the arterial system Pulse waves also cause the pulse to flex or oscillate. The baseline pressure presented in the Ma Bo is the so-called diastolic pressure (d i a s t ο 1 i c essure)-about 80 mmHg, and the highest point pressure is the systolic pressure-about 120 mmHg. The difference between these two pressures is about 40mniHg-called pulse pressure; the other is "mean arterial pressure (MAP)" which represents the time-weighted average blood pressure value. There are various differences in the known The blood pressure measurement methods and devices can measure the above-mentioned blood pressure values. The most common way is to use a flat cuff that is tied to the upper arm. After inflation, the blood pressure in the arm artery is compressed and then the blood pressure is relieved. The gas in the thin bag is leaked, and the sound of the pulse of the stethoscope is used at the same time, which is the so-called Korotkoff sound. This Korotkoff sound is the sound generated when the blood returns to normal flow. When the pressure in the thin bag decreases, it will not be heard. This Korotkof f sound. So when you hear the first Ko rot koff sound, the thin bag pressure represents the systolic pressure,

576727 The type C helps to make the thin stools that are often moved by C in super sh to the clock of CC. Description of the invention (2) Diastolic blood pressure can be measured when the sound of K 〇 r 〇 t k 〇 f f is not heard. The above method of measuring blood pressure is generally called the "auscultatory method". Auscultation can be applied to an electric blood pressure measurement device. A thin bag is automatically inflated by a pump, and then a microphone is used. By detecting a Korotkoff sound-transformed electronic signal through a circuit, systolic and diastolic blood pressure can be measured. However, there are many other blood pressure measurement methods, such as one caused by sound waves reflecting from the arterial wall. Doppler ifts to measure blood pressure, another method can be directly inserted into the blood vessel to measure blood pressure. However, in addition to the above-mentioned "auscultation method", the other most commonly used blood pressure measurement method is the so-called π pulse Osci 1 lometric method) The principle of the pulse wave method is based on the arterial pulse caused by the injection of blood into the heart. This pulsation exists even near or in the arm area covered by a thin bag. In fact, the pressure change causes The pulsation will be transmitted to the bag itself through the arteries. Therefore, the small change can be compared with the pressure provided by the thin bag. A pressure transducer measures the change in arterial pulsation. This pulsation is called complex wave complexes. It has been found that it has a peak-to-peak amplitude between systolic and diastolic blood pressure. When it reaches the maximum value, it is close to MAP in terms of physiology. It is found that the amplitude of the complex wave caused by the pressure of the thin bag is equal to the systolic pressure and the diastolic pressure, and it has a specific correspondence relationship with the maximum amplitude. The method of π wave is based on the detection of composite wave vibration at different thin bag pressures.

Page 6 576727 V. Description of the invention (3) The blood pressure is measured by the upper bag. However, the inflation of the upper thin bag is generally the process of inflation to patients with hypertension. There are quite a lot of bags for a period of pain and discomfort. The benefit is [creating a proper amount to measure the sense of fitness will be more effective for the user. The method of taking into account the actual progress of today ’s human law makes the measurement important. In view of the blood pressure measured according to the above steps ... (A) Fluid flow value. The method of "pulse wave" is pressurized to a blood pressure value that is much higher than those who are normally close to 180mmHg to 240. However, the discomfort will cause the arms to be tightly bound and blood pressure created, especially for the more severe and even the In addition, the design that does not need to be pressurized to the nature, which leads to the need for a further improvement of the material life, can provide more shortcomings during the test, and the value of systolic pressure varies from mmHg. It is because the obesity may be used at a low or high level. How can human inflators use the pressure of thin bags of blood pressure to take into account the pressure caused by the pressure of thin bags? Li Guonan needs to endure that his tightness is also in phase, but the accurate fitness phase of the blood in a comfortable year requires careful measurement of the energy so that the thinness is not caused by the local production process. Pressure measurement of blood pressure to the ground is also listed in the step of blood production, gradually increasing the measurement of different pressures and overview], the purpose of this creation is to provide a method that combines both comfort and quasi-measurement methods and The purpose of this creation is to provide a blood pressure measurement method that includes applying a pressure to compress an artery of an object to block the artery; (b) continuously reducing the pressure on the artery to enable strong blood flow in the artery; (c) in The pulsation of each arterial back pressure on the detection value during the above-mentioned hypotensive process, and obtain

Page 7 576727 V. Description of the invention (4) A pulse wave at different time points; (d) Converting the pulsation into a voltage signal; (e) Processing the voltage signal to form a series of amplitude waves, and according to the peak value of each amplitude wave Connected into a curve; (f) judge the curve as a curve with a maximum value, otherwise repeat all the steps of pressing to obtain the curve; (g) completely release the pressure to determine the object's heart pressure and an average according to the curve Arterial pressure; and (h) Determine the heart's constriction based on diastolic pressure, mean arterial pressure, and pulse wave.

According to the above purpose of the present invention, a blood pressure measuring device is provided, which includes an inflatable, pressure-deflated and pressure-relieved thin bag, a controller, a detector, a pressure transmitter, a processor, and a calculator. The controller is used to control the pressure in the thin bag, so that the thin bag can be pressurized and released in sections until the inflation pressure of the thin bag is higher than the average arterial pressure (MAP) of the object, and then the pressure is released; then the pressure transmitter , Which is connected to a thin bag to convert the pulsation into a voltage signal; then the processor processes the voltage signal to form a series of amplitude waves, and according to the peak value of each amplitude wave during pressure release, each is connected to a curve with an extreme value; finally, The obtained heart's diastolic pressure and an average arterial pressure are determined according to the obtained curve, and the heart's systolic pressure is further determined according to the pulse wave. Among them, the maximum value obtained from the curve obtained above is the average arterial pressure, and the preferred systolic blood pressure should be determined based on the pulse wave obtained near the average arterial pressure.

In order to make the above and other objects, features, and advantages of this creation more comprehensible, a preferred embodiment is given below, and described in detail with the accompanying drawings. [Description of Creation]

Page 8 576727 V. Description of the invention (5) Please refer to "Figure 1", which shows the time axis as the horizontal axis when measuring blood pressure, and the pressurizing pressure or pulsation amplitude of the inflation in the thin bag as the vertical axis. An illustration of the corresponding correspondence curve. As shown in the figure, from the time point TQ when the blood pressure measurement is started, the thin bag needs to be continuously inflated and pressurized to a high pressure value PH preset by the sphygmomanometer. The pressure value at this time is generally to ensure that The sphygmomanometer can measure the blood pressure of patients with hypertension, and it must be set to be much higher than the systolic blood pressure Ps of normal people, otherwise the dilemma of systolic blood pressure of patients with hypertension may occur. For example, the pH may be set to 1 80mmHg or more High value. Then, within the time L ~ T2 of releasing the pressure in the thin bag, the pulsation will be generated according to the aforementioned arteries. By measuring the amplitude of the composite wave at each different time point, the peaks of each amplitude can be connected as shown in curve 1 0 oscillometric envelop. Finally, it was learned at time T2 that the pressure had fallen to a sufficiently low value, for example, when the diastolic pressure PD, which is much lower than that of a normal human body, the pressure in the thin bag was completely released, and the entire measurement cycle of the sphygmomanometer was ended. The conventional measurement method focuses on how to accurately obtain the pulsation of the counterpressure of the arteries during the pressure relief process, so that the envelope curve can be drawn by using various calculation methods to determine the systolic pressure Ps and the diastolic pressure PD. . However, the inflation pressure of the conventional blood pressure measuring device is based on the systolic pressure, and therefore, a high inflation pressure cannot be avoided. Please refer to "Figure 2" again. In comparison, the method for measuring blood pressure of the present invention can clearly see the difference, that is, the maximum value of the inflation pressure of the thin bag is reduced. Compared with Figure 1, the whole figure can be regarded as eight The pressurized section of ~ 1 \ time translates to the right, and therefore the left curve of the envelope curve 10 of FIG. 1 is truncated by a large amount.

Page 9 576727 V. Description of the invention (6), so the curve 20 obtained from Figure 2 cannot determine the value of systolic pressure Ps, because the inflation pressure in the pressurizing section is not high enough, and the pulsating compound wave The curve with increasing peak amplitude cannot be completely obtained, so the obtained curve only contains the mean arterial pressure MAP and diastolic pressure PD. In this case, the present invention uses a reference pulse wave to determine systolic blood pressure. Please refer to "Figure 3", which shows the pulse wave near the mean arterial pressure with time as the horizontal axis and pressure as the horizontal axis. According to the foregoing, blood will be intermittently compressed into the arteries with each periodic contraction of the myocardium, and an irregular waveform pressure pulse wave is formed in the arterial system. The baseline pressure shown in the waveform pulse wave 30 in FIG. 3 is Diastolic blood pressure PD, while the highest point pressure is systolic blood pressure Ps, and the other is the blood pressure value MAP · which is weighted average with time. Therefore, according to the PD and MAP determined by the curve in FIG. 2 and referring to the pulse wave 30 in FIG. 3, the value of APS can of course be determined. The method for measuring blood pressure according to the present invention is different from the conventional method. As shown in FIG. 1, since the inflation pressure is based on the systolic pressure, no matter what, _PH is higher than Ps-a predetermined value, so it is thin. The inflation pressure of the bag is maintained at a high value, such as 180 mmHg or even 240 mmHg. However, for general positive ... the systolic blood pressure of ordinary people may be around 1 30mmHg, or the systolic blood pressure of patients with suspected hypertension may be 160 mm Hg or higher, but the point is that anyone has the same blood pressure measurement. Accept the process of pressing the high pressure inflatable thin bag to press the arm. Although the compression time can be shortened by rapid inflation, according to g, it must go through the high pressure section and slowly release the pressure from the thin bag until the entire measurement stroke is completed. : to make. In addition, the blood vessels are pressurized by high pressure again and again, and fatigue fatigue also makes continuous blood pressure measurement impossible, otherwise there may be inaccuracy.

Page 10 576727 V. Description of Invention (7) Appears. In contrast, in the present invention, the inflation pressure is averaged on the basis of MAp, and the difference between & is about 30 mmHg, so it is obvious to know that Ph can be reduced by at least 30 mmHg compared to pH. In this case, the highest inflation pressure of the thin bag is set at a predetermined value higher than MAp. This predetermined value is, for example, 20mmHg ~ 40mmHg, and a normal person's MAP value is about 110 mm H g. In other words, with the measuring method of the present invention, the inflation pressure can be easily and comfortably measured by pressurizing the inflation pressure to about 140 in m H g. In patients with high blood pressure, MAP may increase, but the value of pressing to Ph will not be higher than the conventional pH. In this way, the disadvantages of the uncomfortable measurement process are improved, and the relative inflation time is shortened, the measurement is faster, and the power saving effect is also achieved. · The above-mentioned method for measuring blood pressure according to the present invention can provide the function of fUZZy control. The reason is that the method of segmented pressure is used, as in the preferred embodiment, there are two continuous pressure sections. In the first stage of pressurization, only pressurize to a Pi value first, and then release the pressure to a P2 value within time t1 to 1: 2. The main purpose of this stage of pressurization is to use the curve C in this section. Check whether the pressure value Pi 疋 in this section of pressure is MAP, and according to the situation that the amplitude of the pulsating wave measured during the pressure release is continuously decreasing, it means that the MAP value cannot be obtained in the amplitude curve of this section. Maximum value curve. Then, when the pressure drops to p2, it is necessary to increase the pressure value beyond the pressure through inflation and pressurization? A p3 value of 1 also releases the pressure immediately after time t3. In this preferred embodiment, the pulse wave curve containing MAP is obtained in this kind of pressurization and pressure release, which is judged by the piano method. Quite simply, referring to the curve 20 in FIG. 2, a curve with increasing amplitude can be obtained during the pressure release process after 13 hours, which represents the continuous pressure release to the full pressure release.

Page 11 576727 V. Description of the invention (8) A curve with maximum value such as curve 20 must be obtained, so the pressure is completely released at time t4 to obtain curve 20. The above-mentioned fuzzy control is to 'use segmented pressure release to dynamically adjust the highest value of the pressure Ph to ensure that the obtained curve 20 can determine the MAP and PD values, so that it can be further based on Figure 3 The resulting pulse wave determines the Ps value. To measure blood pressure according to the above method, you can first set the pressure value Pi of the first stage without being too high. You can set the MAP value of a normal person to 120mmHg, for example, so most people can The curve 20 is obtained during one stage of pressure release, so blood pressure is measured at a relatively low pressure value. For the first stage of pressure release, a curve 20 with a maximum value cannot be obtained. Continue to pressurize and release pressure in another stage. You can set the pressure difference in this stage of repressurization, for example, at an interval of 20 mm H g, that is, re-pressurize to 140 mm Hg, and determine whether it is higher than MAP. Obtain curve 20, otherwise repeat continuous pressure release until curve 20 is obtained. In addition, when referring to the pulse wave 30 in FIG. 3, it is preferable to use the pulse wave obtained near the average arterial pressure, because the pulse “pulse wave obtained in this section is more stable and representative, so it can also be based on Therefore, a more accurate Ps is determined.… Finally, according to the above-mentioned blood pressure measurement method of the present invention, a blood pressure measurement device can be correspondingly designed, which includes a thin bag that is inflatable, pressurized, and deflated, a controller, A detector, a pressure transmitter, a processor, and a calculator. The controller is used to control the pressure in the thin bag so that the thin bag can be pressurized and decompressed in sections of φ until the thin bag inflation pressure is high The pressure is released at the mean arterial pressure (MAP) of the object; a pressure transmitter is connected to the thin bag to convert the pulsation into a voltage signal; and the processor processes the voltage signal shape

Page 12 576727 V. Description of the invention (9) Form a series of amplitude waves, and form a curve with extreme value according to the peak value of each amplitude wave during pressure release; Finally, determine the heart ’s relaxation pressure and An average arterial pressure, and further determine the object's heart pressure based on the pulse wave. Although this creation has been disclosed as above with a preferred embodiment, it is not intended to limit this creation. Anyone skilled in this art can make some changes and retouching without departing from the spirit and scope of this creation. Therefore, this creation The scope of protection shall be determined by the scope of the attached patent application.

Page 13 576727 Brief description of the drawings [Description of the drawings and symbols] Description of the drawings: The first diagram shows the conventional measurement of blood pressure with time as the horizontal axis, the cuff pressure or pulsation of inflation in a thin bag The amplitude (〇sci 1 1 ati ο namp 1 amplitude) is the corresponding relationship curve shown on the vertical axis; FIG. 2 shows the pressure or pulsation of inflation in a thin bag with time as the horizontal axis when measuring blood pressure according to the present invention. The amplitude is the corresponding relationship curve indicated by the vertical axis, and FIG. 3 shows the pulse wave near the corresponding average arterial pressure indicated by the horizontal axis and the pressure as the horizontal axis when the blood pressure is measured according to the present invention.

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Claims (1)

576727 6. Scope of patent application A method for measuring blood pressure, including at least the following steps: A pressure compresses an artery of an object to prevent the flow of blood application fluid in the artery from continuously increasing to the upper pulse back pressure pulse wave conversion processing amplitude wave Judging the pressure to complete pressure and one based on the object, such as applying the average, such as applying the systole to determine. 4. A quantity to measure 2 3 movement; reduce the blood flow to the pulse of the blood pressure The peak of electricity is released. The mean pressure of the heart is patented. The patent pressure of the artery is the pressure of the pressure. The curve is the pressure of the artery. The pressure of the artery is the range of the compression pressure. The pressure is the range of blood pressure according to the blood pressure. One by one; In the process, each artery on each different pressure value is detected, and one at each time point is a voltage signal; the signal forms a series of amplitude waves, and forms a curve according to each; Value curve, otherwise repeat all the previous steps; to determine the center of the object according to the curve Diastolic blood pressure; and the average arterial pressure and the pulse wave determine the method for measuring blood pressure according to item 0, wherein a maximum value obtained by the curve is obtained. The method for measuring blood pressure according to item i, wherein the pulse wave device obtained near the mean arterial pressure is a pulsation generated by an object artery including at least: Page 15 576727 VI. Application scope of patent-a thin bag that can be pressurized and bubble released; a controller that is powered by a motor to control the pressure in the thin bag so that the thin bag can be segmented Pressurize and release the pressure until the thin bag inflation pressure is higher than the average arterial pressure (MAP) of the object, and then release the pressure; a detector for detecting the thin bag at different pressure values during pressure release. A pulsation generated by arterial back pressure, and a pulse wave at various time points can be obtained; a pressure transmitter connected to the thin bag to convert the pulsation into a voltage signal; a processor for processing the voltage The signal forms a series of amplitude waves, and a peak curve is formed according to the peak value of each amplitude wave when the pressure is released; and a calculator determines the object's cardiac diastolic pressure and an average arterial pressure based on the curve, And according to the pulse wave, the heart's constriction of the object is determined. 5. The blood pressure measuring device as described in item 4 of the scope of patent application, wherein the average arterial pressure is a maximum value obtained by obtaining the curve. 6. The blood pressure measuring device according to item 4 of the scope of patent application, wherein the systolic blood pressure is determined based on the pulse wave obtained near the mean arterial pressure. Page 16