CN101612039A - Self-adaption blood pressure detector - Google Patents
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Abstract
The invention discloses a kind of self-adaption blood pressure detector, comprise detecting element, in order to detect static pressure and the pulse wave in the cuff; The aeration speed calculating part receives interior static pressure and the pulse wave of cuff that detecting element detects, and according to initial detected pulse wave of fast aeration stage, calculates measured's instantaneous heart rate, and sets the aeration speed of linear aeration phase according to this heart rate; Linear inflation compensation dosage according to the result of calculation of aeration speed calculating part, and according to the static pressure that detecting element detects, is calculated in real time by linear ventilating control portion, and the control aerating device carries out linearity to oversleeve to be inflated, up to the pulse wave amplitude less than predetermined threshold value; And the blood pressure calculating part, static pressure and pulse wave according to linear aeration phase detecting element is measured calculate measured's blood pressure; Self-adaption blood pressure detector of the present invention according to measured's heart rate self adaptation linear adjustment aeration speed, is eliminated the influence of individual variation to testing result, and detection time is short, testing result is accurate.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly be used to detect the device of blood pressure.
Background technology
Blood pressure is a reflection cardiovascular system state important physical parameter.In recent years, the sickness rate of hypertension in mid-aged population constantly rises, and usually is the key factor that causes the cardiovascular system some diseases, so the accurate detection of blood pressure becomes more and more important in clinical and health service.Non-invasive blood pressure is measured main Ke Shi sound method and the oscillographic method (Oscillometric Method) of adopting clinically at present.The oscillographic method measuring blood pressure is to differentiate blood pressure by the relation of setting up systolic pressure, diastolic pressure and oversleeve pressure wave.Because pulse pressure ripple and blood pressure have comparatively stable dependency, therefore the pressure value that utilizes the oscillographic method principle to measure is more accurate.And during the oscillographic method measuring blood pressure, no pickup device in the oversleeve, simple to operate, it is strong to have a capacity of resisting disturbance than Ke Shi sound method, measures reliably, is convenient to realize the blood pressure advantage of detection automatically, is just obtaining application more and more widely.
What the use of oscillographic method blood pressure measurement was maximum is ladder venting measuring method, at first by the air pump fast aeration blood vessel is blocked fully, and then slowly ladder venting, realizes the measurement of systolic pressure, mean pressure, diastolic pressure, and this method measurement accurately.But need that in use cuff inflation is reached higher pressure and block blood vessel fully, but because the individual variation of measuring object is difficult to select suitable the blowing pressure, therefore the sphygomanometer that uses this measuring method all is the measurement mistake that adopts excessively pressurization to avoid under-inflation to bring, and causes the bigger sense of discomfort of measuring object usually.In addition, adopt a plurality of Air Valve Control venting usually, cause problems such as blood pressure measurement overlong time, equipment volume power consumption are big in order to realize the venting of accurate ladder.
In order to solve above-mentioned shortcoming, have the blood pressure measuring method of having researched and proposed based on gas replenishment process, promptly in gas replenishment process, just realize the measurement of each blood pressure parameter.This method has measuring speed advantage faster, avoided the shortcoming of ladder venting measuring method, but simultaneously because in the gas replenishment process along with cuff pressure increases that the blowing pressure increases can be more and more slower, make the interior static pressure actual curve of cuff be similar to parabola, and when blood pressure calculates, according to the simple normalizing of blood pressure mean pressure Pm that detects pulse amplitude maximum Am correspondence is that linear relationship calculates diastolic pressure Pd and systolic pressure Ps, and there are bigger measurement error in the Pd and the Ps of this and actual measurement.And this method does not have the self adaptation adjustment to different measuring object aeration speed, and the pulse wave number that the measuring process under different hearts rate is obtained there are differences, and causes the individual variation of certainty of measurement.
Shortcoming for the low precision that solves the aeration blood pressure measurement, the advantage that has research to use for reference ladder venting method has proposed ladder inflation blood pressure detection method, this method has remedied the shortcoming of the low precision of traditional inflation blood pressure detection method, carrying out the blood pressure normalizing with the ladder inflation curve that is easy to realize calculates, efficiently solve the problem of accuracy of detection, but this scheme ladder inflation needs about 1 second inflation retention time to disturb to avoid inflating the cuff shake that causes, make and the blood pressure measurement overlong time be unfavorable for the needs that long-term dynamics detects.
Summary of the invention
In view of this,, the invention provides self-adaption blood pressure detector, can eliminate the influence of individual variation according to measured's heart rate self adaptation linear adjustment aeration speed to testing result in order to address the above problem.
The object of the present invention is achieved like this: self-adaption blood pressure detector, oversleeve is installed on measured's arm, by aerating device and means of deflation cuff is pressurizeed and reduces pressure, measure described measured's blood pressure, described self-adaption blood pressure detector comprises:
Detecting element is in order to detect static pressure and the pulse wave in the cuff;
The aeration speed calculating part receives interior static pressure and the pulse wave of cuff that detecting element detects, and according to initial detected pulse wave of fast aeration stage, calculates measured's instantaneous heart rate, and sets the aeration speed of linear aeration phase according to this heart rate;
Linearity ventilating control portion, according to the result of calculation of aeration speed calculating part, and, calculate linear inflation compensation dosage in real time according to the static pressure that detecting element detects, the control aerating device carries out linearity to oversleeve to be inflated, up to the pulse wave that detects predetermined quantity or pulse wave amplitude less than predetermined threshold value; And
The blood pressure calculating part, static pressure and pulse wave according to linear aeration phase detecting element is measured calculate measured's blood pressure.
Further, described aeration speed calculating part detects initial detected pulse wave peak value of fast aeration stage in real time, by
Inferior/minute, calculating measured's instantaneous heart rate, in the formula, HR is an instantaneous heart rate, T is the time of adjacent two pulse wave peak intervals;
Further, described aeration speed calculating part passes through formula
Calculate the aeration speed of linear aeration phase, in the formula, V
InBe linear aeration speed; P
MaxBe predetermined maximum inflation static pressure; P
T1For the fast aeration stage finish, static pressure when linear aeration phase begins in the cuff; PW is the default pulse wave number that needs detection; HR is an instantaneous heart rate;
Further, described P
MaxBe 300mmHg, PW is 60;
Further, described linear ventilating control portion is by δ=(t-t
1) V
In-P
iCalculate linear inflation compensation dosage, in the formula, δ represents linear inflation compensation dosage; T represents linear inflation current time, t
1For linearity is inflated the zero hour, t-t
1The linear inflation of expression is carried out the time; V
InBe linear aeration speed; P
tBe the static pressure in the moment t cuff;
Further, described detecting element is a pressure transducer;
Further, described self-adaption blood pressure detector also comprises display device, and described display device receives the result of calculation of blood pressure calculating part and shows output;
Further, described self-adaption blood pressure detector also comprises storage device, and described storage device receives the result of calculation and the storage of blood pressure calculating part;
Further, described self-adaption blood pressure detector also comprises communicator, and described communicator is used to transmit the result of calculation with the blood pressure calculating part;
Further, described communicator comprises at least a in USB module and the wireless radio-frequency communication module.
Self-adaption blood pressure detector of the present invention according to measured's heart rate self adaptation linear adjustment aeration speed, is eliminated the influence of individual variation to testing result, and detection time is short, testing result is accurate.
Other advantages of the present invention, target, to set forth in the following description to a certain extent with feature, and to a certain extent,, perhaps can obtain instruction from the practice of the present invention based on being conspicuous to those skilled in the art to investigating hereinafter.Target of the present invention and other advantages can be by following description, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:
Fig. 1 shows the self-adaption blood pressure detector structural representation;
Fig. 2 shows the self-adaption blood pressure detected pressures and changes sketch map;
Fig. 3 shows self-adaption blood pressure detector workflow sketch map.
The specific embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.
Referring to Fig. 1, the self-adaption blood pressure detector of present embodiment comprises the cuff 1 that is used to be installed in the measured measuring point, is arranged at the static pressure that is used in the cuff 1 survey in the cuff and detecting element 2, the self-adaption blood pressure detector main body 3 of pulse wave; The aerating device 35 that described main body 3 comprises control device 31, the display device 32 that is used to show testing result, the storage device 33 that is used to store display result and testing time, the communicator 34 that is used to transmit testing result that are used for the whole control of self-adaption blood pressure detector, be used for cuff is pressurizeed, be used for means of deflation 36 that cuff is reduced pressure and the calendar clock device 37 that is used for the recording blood pressure testing time.
Described aerating device 35 can be selected inflator pump for use, and described inflator pump is communicated with the air bag that carries cuff 1 by airway, and the described air bag that carries cuff 1 also is communicated with by another root airway, and this airway is provided with the vent valve as means of deflation 36.
Described detecting element 2 can be provided with independent static pressure checkout gear and pulse wave detection device, described static pressure checkout gear can be selected pressure transducer for use, described pulse wave detection device is optional with photoelectric sensor, impedance transducer or pressure transducer, in addition because therefore the overlapping variation that beat pulse is arranged of meeting on the cuff pressure uses a pressure transducer also can realize purpose separately.
Described control device 31 comprises: aeration speed calculating part, linear ventilating control portion and blood pressure calculating part;
The aeration speed calculating part, be electrically connected with detecting element 2, receive interior static pressure and the pulse wave of cuff that detecting element 1 detects, the fast aeration stage by detecting initial several pulse waves (being preferably 3), calculate measured's instantaneous heart rate, and set the aeration speed of linear aeration phase according to this heart rate; Described aeration speed calculating part detects initial pulse wave peak value in real time by differentiation, and the time T of adjacent two pulse wave peak intervals is exactly the time of a heart beating, then measured's instantaneous heart rate
(inferior/minute).
Described aeration speed calculating part is set the aeration speed of linear aeration phase according to measured's instantaneous heart rate HR, thereby guarantees that the described self-adaption blood pressure detector of blood pressure measurement under the different instantaneous heart rates can detect enough pulse wave numbers.By a large amount of experiments and clinical trial, the preferred version of blood pressure detector of the present invention is set in linearity and is inflated under the state of 300 millimetress of mercury (mmHg) and can detects 60 pulse wave numbers, therefore the aeration speed of linear aeration phase
V wherein
InRepresent linear aeration speed, unit is mmHg/s (a millimetres of mercury per second); P
MaxThe predetermined maximum inflation static pressure of expression, preferred version of the present invention is set at 300 (mmHg); P
T1For the fast aeration stage finish, static pressure when linear aeration phase begins in the cuff; PW represents the pulse wave number that default needs detect, and preferred version of the present invention is set at 60; HR represents instantaneous heart rate.
Linearity ventilating control portion, result of calculation according to the aeration speed calculating part, and the static pressure that detects according to detecting element, calculate linear inflation compensation dosage in real time, control aerating device 35 carries out the linearity inflation to oversleeve, less than predetermined threshold value, the pulse wave of described predetermined quantity is generally 60 up to the pulse wave that detects predetermined quantity or pulse wave amplitude (numerical value behind the digitized), and described threshold value is generally about 30;
Described linear ventilating control portion is by formula δ=(t-t
1) V
In-P
iCalculate the linear linearity inflation compensation dosage δ of t constantly that is inflated to.Wherein δ represents linear inflation compensation dosage; T represents linear inflation current time t, t
1For linearity is inflated the zero hour, t-t
1The linear inflation of expression is carried out the time; V
InRepresent linear aeration speed; P
tExpression is the interior static pressure of t cuff constantly.
The blood pressure calculating part, static pressure and pulse wave according to linear aeration phase detecting element is measured calculate measured's blood pressure, calculate measured's blood pressure by static pressure and pulse wave and belong to prior art, repeat no more in the present embodiment.
The workflow of the self-adaption blood pressure detector of present embodiment is referring to Fig. 3, when using this device, cuff is installed on measured's the arm, the fast aeration stage in the 0-t1 time period is carried out fast aeration, at the beginning, blood vessel is in the state of abundant diastole, the pulse wave amplitude is less, pressure transducer can't detect pulse wave signal, static pressure increases in the cuff along with fast aeration is measured, the pulse wave amplitude increases gradually, after pressure transducer detects first three pulse wave signal, described aeration speed calculating part is by dynamic analysis cuff static pressure pace of change and pulse wave signal, calculate the heart rate situation of current measuring object, and draw the aeration speed of t1-t2 linear aeration phase constantly, guarantee that second stage is described can detect competent pulse wave number with this, avoid guaranteeing the blood pressure measurement precision because the pulse wave that the individual variation of measuring object causes detects several difference; Subsequently, enter linear aeration phase, aeration speed according to the calculating of fast aeration stage, linearity ventilating control portion control inflator pump carries out the linearity inflation to cuff, detect the static pressure in the cuff simultaneously, described checkout gear is measured the variation of cuff static pressure by the microprocessor dynamic analysis, calculate and judge linear inflation compensation dosage, provide the linear compensation control signal, Real-time and Dynamic is adjusted the inflator pump aeration speed, realizes measuring linear the increasing of the interior static pressure of cuff, and normalizing calculates and meets linear relationship fully, fundamentally solve the precision shortcoming of inflation blood pressure detection method, can not increase detection time simultaneously.At this moment blood vessel is along with the cuff static pressure increases from diastole state to going load condition to taper to the state of pressing off again, the process of the pulse amplitude that detects through diminishing again from small to large, when the pulse wave amplitude that detects less than described device preset threshold or when detecting the pulse wave of predetermined quantity, linear aeration phase finishes, described blood pressure calculating part is according to the cuff static pressure and the pulse wave signal that detect, calculate the mean pressure of measuring object, diastolic pressure and systolic pressure, result of calculation is stored into storage device, in display device, show simultaneously, and the control vent valve is opened, exit fast, finish a self-adaption blood pressure and detect.
Fig. 2 shows self-adaption blood pressure detector when carrying out blood pressure measurement cuff static pressure and the time dependent sketch map of pulse wave, the blood pressure that this figure has explained the preferred embodiments of the present invention intuitively detects principle.When measuring blood pressure, the static pressure in the cuff has experienced the variation of three phases, fast aeration stage (0-t promptly of the present invention
1Period), linear aeration phase (t
1-t
2Period) and fast venting stage (t
2-t
3Period).Along with the variation of cuff static pressure, the process that the pulse wave amplitude experience that checkout gear is measured reduces from small to large again.Wherein at 0-t
1Period is obtained the measured instantaneous heart rate by T blanking time that detects adjacent two pulse waves, draws t with this
1-t
2The speed of linear inflation of period.Accuracy of detection improves by detecting the linearity that linear compensation dosage δ guarantees linear aeration phase cuff static pressure in linearity ventilating control portion.When detecting the variation of pulse wave amplitude less than the device preset threshold, linear aeration phase finishes vent valve to be opened, and exits the stage fast.A self-adaption blood pressure testing process, blood vessel be along with the cuff static pressure increases from diastole state to going load condition to taper to the state of pressing off again, the process of the pulse amplitude that detects through diminishing again from small to large, and the maximum m point of pulse wave amplitude, amplitude is A
mCorresponding cuff static pressure P
mBe exactly the mean pressure that blood vessel goes load condition, carry out normalizing calculating by the range coefficient method and just can obtain the pulse wave amplitude A that diastole d is ordered
dWith shrink the pulse wave amplitude A that s is ordered
s, from then on obtain corresponding diastolic pressure P
dWith systolic pressure P
s
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from technological thought of the present invention and scheme scope the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. self-adaption blood pressure detector is installed on oversleeve on measured's arm, by aerating device and means of deflation cuff is pressurizeed and reduces pressure, and measures described measured's blood pressure, and it is characterized in that: described self-adaption blood pressure detector comprises:
Detecting element is in order to detect static pressure and the pulse wave in the cuff;
The aeration speed calculating part receives interior static pressure and the pulse wave of cuff that detecting element detects, and according to initial detected pulse wave of fast aeration stage, calculates measured's instantaneous heart rate, and sets the aeration speed of linear aeration phase according to this heart rate;
Linearity ventilating control portion, according to the result of calculation of aeration speed calculating part, and, calculate linear inflation compensation dosage in real time according to the static pressure that detecting element detects, the control aerating device carries out linearity to oversleeve to be inflated, up to the pulse wave that detects predetermined quantity or pulse wave amplitude less than predetermined threshold value; And
The blood pressure calculating part, static pressure and pulse wave according to linear aeration phase detecting element is measured calculate measured's blood pressure.
2. self-adaption blood pressure detector as claimed in claim 1 is characterized in that: described aeration speed calculating part detects initial detected pulse wave peak value of fast aeration stage in real time, by
Inferior/minute, calculating measured's instantaneous heart rate, in the formula, HR is an instantaneous heart rate, T is the time of adjacent two pulse wave peak intervals.
3. self-adaption blood pressure detector as claimed in claim 2 is characterized in that: described aeration speed calculating part passes through formula
Calculate the aeration speed of linear aeration phase, in the formula, V
InBe linear aeration speed; P
MaxBe predetermined maximum inflation static pressure; P
T1For the fast aeration stage finish, static pressure when linear aeration phase begins in the cuff; PW is the default pulse wave number that needs detection; HR is an instantaneous heart rate.
4. self-adaption blood pressure detector as claimed in claim 3 is characterized in that: described P
MaxBe 300mmHg, PW is 60.
5. self-adaption blood pressure detector as claimed in claim 3 is characterized in that: described linear ventilating control portion is by δ=(t-t
1) V
m-P
tCalculate linear inflation compensation dosage, in the formula, δ represents linear inflation compensation dosage; T represents linear inflation current time, t
1For linearity is inflated the zero hour, t-t
1The linear inflation of expression is carried out the time; V
InBe linear aeration speed; P
tBe the static pressure in the moment t cuff.
6. as each described self-adaption blood pressure detector in the claim 1 to 5, it is characterized in that: described detecting element is a pressure transducer.
7. as each described self-adaption blood pressure detector in the claim 1 to 5, it is characterized in that: described self-adaption blood pressure detector also comprises display device, and described display device receives the result of calculation of blood pressure calculating part and shows output.
8. as each described self-adaption blood pressure detector in the claim 1 to 5, it is characterized in that: described self-adaption blood pressure detector also comprises storage device, and described storage device receives the result of calculation and the storage of blood pressure calculating part.
9. self-adaption blood pressure detector as claimed in claim 8 is characterized in that: described self-adaption blood pressure detector also comprises communicator, and described communicator is used to transmit the result of calculation with the blood pressure calculating part.
10. self-adaption blood pressure detector as claimed in claim 9 is characterized in that: described communicator comprises at least a in USB module and the wireless radio-frequency communication module.
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| CN101612039B CN101612039B (en) | 2011-07-27 |
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| CN102885619A (en) * | 2011-07-21 | 2013-01-23 | 荣新半导体（深圳）有限公司 | Blood pressure detecting device |
| CN102895013A (en) * | 2012-10-30 | 2013-01-30 | 郑才二 | Remote end ischemia preadaptation therapeutic apparatus with function of measuring blood pressure |
| CN103340618A (en) * | 2013-07-23 | 2013-10-09 | 焦保健 | Digital blood pressure monitor and implementation method thereof |
| CN103961079A (en) * | 2014-05-07 | 2014-08-06 | 中国科学院微电子研究所 | Inflating and deflating method and system for blood pressure measurement |
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| CN113679364A (en) * | 2021-08-09 | 2021-11-23 | 研和智能科技(杭州)有限公司 | Blood pressure measurement and calculation method |
| CN117898690A (en) * | 2024-03-19 | 2024-04-19 | 深圳市微克科技股份有限公司 | Inflation control method, inflation control system and storage medium for watch type blood pressure detection |
| CN117898690B (en) * | 2024-03-19 | 2024-05-24 | 深圳市微克科技股份有限公司 | Inflation control method, inflation control system and storage medium for watch type blood pressure detection |
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| CN101612039B (en) | 2011-07-27 |
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