CN211560085U

CN211560085U - Blood pressure measuring device with pressure meter on arm combined with photoelectric volume pulse wave

Info

Publication number: CN211560085U
Application number: CN201921911776.3U
Authority: CN
Inventors: 郁然; 钟华臻; 欧阳彪
Original assignee: Moson Technology Pte Ltd
Current assignee: Moson Technology Pte Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-09-25
Anticipated expiration: 2029-11-07

Abstract

The utility model discloses a blood pressure measuring device of pressure gauge combination photoelectricity volume pulse wave on arm, including host system, display module, add and subtract voltage control ware, pressure oversleeve, photoelectricity volume pulse signal detection module, host system is connected with display module, add and subtract voltage control ware, photoelectricity volume pulse signal detection module respectively, and add and subtract voltage control ware and pressure oversleeve are connected. The device uses the blood pressure oversleeve, and the inaccurate problem of measurement in great reduction blood pressure bracelet can the precision measurement blood pressure, measures pulse wave blood pressure, has improved the stability of blood pressure measured value, has increased blood pressure measuring tool's portability simultaneously.

Description

Blood pressure measuring device with pressure meter on arm combined with photoelectric volume pulse wave

Technical Field

The utility model relates to a blood pressure measurement technical field specifically is a blood pressure measurement device of pressure gauge combination photoelectricity volume pulse ripples on arm.

Background

The blood pressure examination is a routine examination item for physical examination, and the measured blood pressure value is an important basic index for measuring the health condition of a human body. Conventionally, there are two ways of measuring blood pressure: 1. the Coriolis method (also called auscultatory method): the brachial artery pressure meter is characterized in that an arm band of a pressure meter (generally called a sphygmomanometer) is bound to the position of the brachial artery pulse on the upper arm, the brachial artery is deflated by inflation and pressurization, and then the pressure is relieved by deflation. As the external pressure drops, the blood flow re-washes away the blood vessels and the same rhythmic tone as the heart beat (this tone is called Korotkoff sound) is extracted. The pressure indicated by the pressure gauge when the stethoscope sounds the "first sound" is recorded as systolic pressure and the "last sound" is recorded as diastolic pressure. The doctor listens to this sound with a stethoscope in the same way as a hospital measurement (mercury sphygmomanometer). 2. Oscillation method (Oscillometric method): the change of vibration generated when blood flows is obtained, and a common electronic sphygmomanometer adopts the method for measuring. The new type is pulse wave measuring method, which adopts pulse wave detecting method to replace Korotkoff's sound method (ear is sound deficiency, eye is true), and the pulse wave can represent the state of blood flow really.

The korotkoff sound blood pressure measurement method has been invented for more than a hundred years so far, and the accuracy of any blood pressure measurement mode is not compared with the korotkoff sound blood pressure measurement method in the hundred years due to the limitation of science and technology, so that the korotkoff sound method becomes the international standard of blood pressure measurement. However, this does not mean that the accuracy of the korotkoff method is completely reliable, and the error is more than that of other blood pressure measurement methods, wherein the errors caused by the hearing and vision and the human subjective judgment are almost unavoidable. The oscillation method is also called oscillography, and is a relatively advanced electronic measurement method developed in the 90 s. The principle is briefly described as follows: firstly, a cuff is tied on an arm, the cuff is automatically inflated, pressurization is stopped after a certain pressure (generally 30-50 mmHg higher than systolic pressure) is reached, deflation is started, when the air pressure reaches a certain degree, blood flow can pass through blood vessels, certain oscillation waves exist, the oscillation waves are transmitted to a pressure sensor through an air pipe, and pressure and fluctuation in the measured cuff can be detected in real time through pressure sensing. Oscillometric sphygmomanometers are a very popular type of sphygmomanometer, and 80% of the sphygmomanometers owned by families are oscillometric sphygmomanometers. It is advanced, and only technically advanced on the electronic instrument for measuring blood pressure, but the core measurement technology (i.e. oscillography) has some defects. Because the value measured by the oscillography is in floating change, no regularity exists, and a plurality of maximum values possibly exist, the numerical value of the blood pressure cannot be truly reflected according to the data obtained by calculation. The pulse wave sphygmomanometer adopts an upper arm cuff and downstream pulse wave detection mode to convert discontinuous events of pulse pulsation into continuous measurement. On one hand, the amplitude of the pulse wave near the systolic pressure is basically changed linearly based on measurement, and the process of judging the existence of the Korotkoff sounds is replaced, so that the inevitable possible error caused by the non-continuity of the heart pulsation is avoided, and the systolic pressure in the blood pressure can be accurately and non-invasively measured; on the other hand, the time characteristic that the delay time between the measured pulse wave and the corresponding air pressure alternating current signal is near the diastolic pressure is used for replacing the process of judging whether the Korotkoff sounds exist or not, so that the inevitable possible error caused by the discontinuity of the heart beat is avoided, and the diastolic pressure in the blood pressure can be accurately and non-invasively measured. Because of the inevitable errors of the korotkoff sounds, the data measured by the pulse wave sphygmomanometer is higher than that obtained by the korotkoff sound measurement method when the korotkoff sound measurement method and the pulse wave measurement method are used at the same time, which indicates that the pulse wave sphygmomanometer can effectively avoid the false hypotension. But because of the advanced process, the price is higher and the cost performance is not high.

Devices for measuring blood pressure by means of PPG signals, such as blood pressure bracelets and the like, are already present on the market today. Although the appearance of the blood pressure bracelet provides a more convenient and quicker measurement way for consumers. But from the consumer feedback point of view, it has the problem of inaccurate measurements. For example, the measurement difference is large in a short time or the data cannot be measured, which brings trouble to consumers. The wrong blood pressure easily causes psychological stress to consumers, and particularly cardiovascular patients even have panic and fear, so that unnecessary physical and psychological damage is caused. The root cause of inaccurate detection of the devices is that PPG signal processing and calculation models are not properly designed and cannot accurately reflect the blood pressure condition of the human body.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, and provide a blood pressure measuring device of pressure gauge combination photoelectricity volume pulse ripples on the arm, the device simple structure conveniently carries, and measuring blood pressure value is stable.

Realize the utility model discloses the technical scheme of purpose is:

the utility model provides a blood pressure measuring device of pressure gauge combination photoplethysmography on arm, includes main control module, display module, add and subtract voltage control ware, pressure oversleeve, photoplethysmography signal detection module, and main control module is connected with display module, add and subtract voltage control ware, photoplethysmography signal detection module respectively, and add and subtract voltage control ware and pressure oversleeve are connected.

The photoplethysmography signal detection module comprises a driving circuit, a light source, a reading circuit and a photodiode, wherein the input end of the driving circuit is connected with the main control module, the output end of the driving circuit is connected with the light source, the output end of the photodiode is connected with the input end of the reading circuit, and the output end of the reading circuit is connected with the main control module.

Photoelectric volume pulse signal detection module, adopt the led lamp that has the light source that can be absorbed by blood and the bracelet of heart rate function of surveying.

Has the advantages that: the utility model provides a blood pressure measuring device of manometer combines photoelectricity volume pulse ripples on arm, the device replaces the gold auscultation method with the PPG signal, more direct accurate measurement blood pressure than the shock method, the use of blood pressure oversleeve is great reduces the inaccurate problem of measurement in the blood pressure bracelet, it adopts pulse ripples blood pressure measurement method, the stability of blood pressure measurement value has been improved, simultaneously increased blood pressure measuring tool's portability, only need to implant a master control module in ordinary motion bracelet (ordinary bracelet all has the function of surveying the rhythm of the heart, can be by led lamp of blood absorption light source need not additionally implant again), control adds decompression controller and the PPG amplitude Hg that obtains of processing, this not only can make the light that present led sent obtain further utilization, also further improved sensing system's multiplexing ability, it is more convenient than mercury sphygmomanometer, electronic sphygmomanometer and pulse sphygmomanometer, the device is easy to realize on low-power consumption and low-speed equipment, the blood pressure value measured by the device is reduced to the greatest extent, and the standard deviation of the blood pressure meets the aim that the AAMI is not more than 8 mmHg.

Drawings

Fig. 1 is a block diagram showing a blood pressure measuring device in which a pressure gauge on an arm is combined with a photoplethysmogram.

Detailed Description

The present invention will be further explained with reference to the drawings and examples, but the present invention is not limited thereto.

Example (b):

as shown in fig. 1, a blood pressure measuring device with an on-arm pressure gauge combined with a photoplethysmogram comprises a main control module, a display module, an up-down pressure controller, a pressure cuff and a photoplethysmogram signal detection module, wherein the main control module is respectively connected with the display module, the up-down pressure controller and the photoplethysmogram signal detection module, and the up-down pressure controller is connected with the pressure cuff.

When this device was used only, wear the blood pressure oversleeve on the arm, photoplethysmography signal detection module adopts the led lamp that has the ability by blood absorption light source and the bracelet of heart rate measuring function, the bracelet is worn in wrist department, host system is through adding the decompression controller control blood pressure oversleeve, make the blood pressure oversleeve under the normal condition that does not produce pressure, read the PPG signal that shows on the bracelet and calculate its amplitude Hg, then host system controls the pressure boost of blood pressure oversleeve through adding the decompression controller, make the bracelet not have PPG signal output. The main control module controls the blood pressure oversleeve to start slow decompression through the pressure increasing and reducing controller, and when a PPG signal just appears on the hand ring, the pressure given to the arm by the blood pressure oversleeve is recorded as systolic pressure (high pressure); the main control module controls the blood pressure oversleeve to continue decompression through the pressure increasing and reducing controller, when a PPG signal displayed on the bracelet just reaches a signal amplitude Hg, the signal amplitude Hg is diastolic pressure (low pressure), and finally, the result is compared with a normal blood pressure value of 90mmHg < systolic pressure <140mmHg, 60mmHg < diastolic pressure <90mmHg to obtain a measurement result, the main control module transmits the measurement result to the display module, and the blood pressure measurement result is displayed in the display module.

Claims

1. The blood pressure measuring device is characterized by comprising a main control module, a display module, an up-down pressure control device, a pressure oversleeve and a photoelectric volume pulse signal detection module, wherein the main control module is respectively connected with the display module, the up-down pressure control device and the photoelectric volume pulse signal detection module, and the up-down pressure control device is connected with the pressure oversleeve.

2. The device as claimed in claim 1, wherein the photoplethysmography detection module comprises a driving circuit, a light source, a readout circuit and a photodiode, an input terminal of the driving circuit is connected to the main control module, an output terminal of the driving circuit is connected to the light source, an output terminal of the photodiode is connected to an input terminal of the readout circuit, and an output terminal of the readout circuit is connected to the main control module.

3. The device as claimed in claim 1, wherein the photoplethysmography module comprises a led light and a bracelet for measuring heart rate.