CN106236057A - A kind of sphygomanometer and a kind of method detecting blood pressure - Google Patents

Abstract

The invention provides a kind of sphygomanometer and a kind of method detecting blood pressure, this sphygomanometer includes: cuff, inflation unit, detector unit, processor；Wherein, described inflation unit is all connected with described cuff with described detector unit；Described processor is connected with described detector unit；Described inflation unit is for inflating in described cuff；Described detector unit, for during described inflation unit is inflated in described cuff, detects the pressure in described cuff in real time, exports the pressure detected to described processor；Described processor pressure in the described cuff inputted according to described detector unit, determines pressure value.The invention provides a kind of sphygomanometer and a kind of method detecting blood pressure, it is possible to reduce the infringement that health is caused.

Description

A kind of sphygomanometer and a kind of method detecting blood pressure

Technical field

The present invention relates to technical field of medical instruments, particularly to a kind of sphygomanometer and a kind of method detecting blood pressure.

Background technology

Blood pressure refers to the endovascular blood lateral pressure for unit are blood vessel wall, namely pressure.That is blood vessel The static pressure of interior blood is exactly blood pressure.When measuring blood pressure, can be realized by sphygomanometer.

Existing sphygomanometer, when measuring blood pressure, first inflates in the cuff of sphygomanometer, can't detect pulse at cuff Time, stop inflating in cuff, then, start to exit from cuff, slowly release from cuff along with gas, the blood at cuff Blood in pipe starts flowing, from the beginning of venting, determines blood pressure by the wave of oscillation in detection cuff.

Existing sphygomanometer is to start to detect blood pressure after blood in the blood vessel stops flowing, the blood in blood vessel at cuff The liquid long period is in blocked state, and this infringement causing health is bigger.

Summary of the invention

Embodiments provide a kind of sphygomanometer and a kind of method detecting blood pressure, it is possible to health is caused by reduction Infringement.

First aspect, embodiments provides a kind of sphygomanometer, including:

Cuff, inflation unit, detector unit, processor；Wherein,

Described inflation unit is all connected with described cuff with described detector unit；

Described processor is connected with described detector unit；

Described inflation unit is for inflating in described cuff；

Described detector unit, for during described inflation unit is inflated in described cuff, detects described sleeve in real time Pressure in band, exports the pressure detected to described processor；

Described processor pressure in the described cuff inputted according to described detector unit, determines pressure value.

Further, described processor, the pressure in the described cuff inputted according to described detector unit, determine pressure Reeb shape, determines described pressure value according to described pressure waveform.

Further, described processor perform described determine described pressure value according to described pressure waveform time, for from Described pressure waveform determines pulse wave, determines the peak swing of described pulse wave, according to the peak swing of described pulse wave and Described pressure waveform determines described pressure value.

Further, described processor is when determining pulse wave described in performing from described pressure waveform, for according to public affairs Pressure waveform described in formula a pair converts, it is thus achieved that the frequency-domain expression of described pressure waveform, according to the frequency of described pressure waveform Territory expression formula, filters interference ripple in the range of predeterminated frequency in described pressure waveform, according to the pressure wave of filtering interfering ripple Shape, obtains described pulse wave, and wherein, described formula one is:

$F\left(\mathrm{\ω}\right)=\underset{-\mathrm{\∞}}{\overset{\mathrm{\∞}}{\∫}}f\left(t\right)e^{-i\mathrm{\ω}t}dt,$

F (ω) is the frequency-domain expression of described pressure waveform, and f (t) is the time-domain expression of described pressure waveform.

Further, described processor, when determining pulse wave from described pressure waveform described in performing, is used for determining institute State amplitude pulse wave band in default amplitude range in all wave bands of pressure waveform, determine the base that each pulse wave band is corresponding Plinth waveform, deducts the basic waveform of correspondence, it is thus achieved that described pulse wave by each pulse wave band；

Wherein, described wave band is the waveform between two minimum points of arbitrary neighborhood in described pressure waveform, wave band Amplitude is the maximum difference with the previous minimum of wave band of wave band, and described pulse wave band is that amplitude is in default amplitude range Wave band, described basic waveform is the described pressure waveform waveform when not having pulse wave described in superposition.

Second aspect, embodiments provides a kind of method detecting blood pressure, including:

Inflate in the cuff being fixed on tested position；

During inflation in described cuff, detect the pressure in described cuff in real time；

Pressure according to detecting in described cuff determines pressure value.

Further, described basis detects that the pressure in described cuff determines pressure value, including:

According to the pressure detected in described cuff, determine pressure waveform, determine described blood pressure according to described pressure waveform Value.

Further, described determine described pressure value according to described pressure waveform, including:

From described pressure waveform, determine pulse wave, determine the peak swing of described pulse wave, according to described pulse wave Peak swing and described pressure waveform determine described pressure value.

Further, described from described pressure waveform, determine pulse wave, including:

Convert according to pressure waveform described in formula a pair, it is thus achieved that the frequency-domain expression of described pressure waveform；

According to the frequency-domain expression of described pressure waveform, by interference ripple in the range of predeterminated frequency in described pressure waveform Filter；

According to the pressure waveform of filtering interfering ripple, obtain described pulse wave；

Wherein, described formula one is:

$F\left(\mathrm{\ω}\right)=\underset{-\mathrm{\∞}}{\overset{\mathrm{\∞}}{\∫}}f\left(t\right)e^{-i\mathrm{\ω}t}dt,$

F (ω) is the frequency-domain expression of described pressure waveform, and f (t) is the time-domain expression of described pressure waveform.

Further, described from described pressure waveform, determine pulse wave, including:

Determine amplitude pulse wave band in default amplitude range in all wave bands of described pressure waveform；

Determine the basic waveform that each pulse wave band is corresponding；

Each pulse wave band is deducted the basic waveform of correspondence, it is thus achieved that described pulse wave；

Wherein, described wave band is the waveform between two minimum points of arbitrary neighborhood in described pressure waveform, wave band Amplitude is the maximum difference with the previous minimum of wave band of wave band, and described pulse wave band is that amplitude is in default amplitude range Wave band, described basic waveform is the described pressure waveform waveform when not having pulse wave described in superposition.

In embodiments of the present invention, detector unit, during inflation unit is inflated in cuff, detects cuff in real time In pressure, the pressure in the cuff that processor detects according to detector unit determines pressure value, say, that according in cuff Pressure in gas replenishment process can realize blood pressure detecting, after current detection unit collects required data, and can be from tested Position removes cuff or to cuff Rapid degassing, decreases cuff blocking time to the blood vessel at tested position, and it is right to reduce The infringement that health causes.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is the present invention Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to These accompanying drawings obtain other accompanying drawing.

Fig. 1 is the schematic diagram of a kind of sphygomanometer that one embodiment of the invention provides；

Fig. 2 is the schematic diagram of the another kind of sphygomanometer that one embodiment of the invention provides；

Fig. 3 is the schematic diagram of a kind of pressure waveform that one embodiment of the invention provides；

Fig. 4 is the schematic diagram of the another kind of pressure waveform that one embodiment of the invention provides；

Fig. 5 is the schematic diagram of another sphygomanometer that one embodiment of the invention provides；

Fig. 6 is the flow chart of a kind of method detecting blood pressure that one embodiment of the invention provides；

Fig. 7 is the flow chart of the method for the another kind of detection blood pressure that one embodiment of the invention provides.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The a part of embodiment of the present invention rather than whole embodiments, based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained on the premise of not making creative work, broadly falls into the scope of protection of the invention.

As it is shown in figure 1, embodiments provide a kind of sphygomanometer, including:

Cuff 101, inflation unit 102, detector unit 103, processor 104；Wherein,

Described inflation unit 102 is all connected with described cuff 101 with described detector unit 103；

Described processor 104 is connected with described detector unit 103；

Described inflation unit 102 is for inflating in described cuff 101；

Described detector unit 103 is used for during described inflation unit 102 is inflated in described cuff 101, in real time Detect the pressure in described cuff 101, the pressure detected is exported to described processor 104；

The described processor 104 pressure in the described cuff according to the input of described detector unit 103, determines blood pressure Value.

In embodiments of the present invention, detector unit, during inflation unit is inflated in cuff, detects cuff in real time In pressure, the pressure in the cuff that processor detects according to detector unit determines pressure value, say, that according in cuff Pressure in gas replenishment process can realize blood pressure detecting, after current detection unit collects required data, and can be from tested Position removes cuff or to cuff Rapid degassing, decreases cuff blocking time to the blood vessel at tested position, and it is right to reduce The infringement that health causes.

In an embodiment of the present invention, described processor, in the described cuff inputted according to described detector unit Pressure, determines pressure waveform, determines described pressure value according to described pressure waveform.

In the present embodiment, the pressure that processor receives, pressure waveform can be determined according to pressure and time.Citing comes Saying, the pressure that processor received the 1st second when is 20mmHg, and the pressure received the 2nd second when is 30mmHg ..., the pressure received n-th second when is N mmHg, and with the time as transverse axis, the longitudinal axis is pressure, generates pressure Reeb shape.

In an embodiment of the present invention, described detector unit, can be pressure transducer, pressure transducer and processor phase Even.Inflation unit can be air pump.

As in figure 2 it is shown, the present invention implements to provide a kind of sphygomanometer, including:

Cuff 101, air pump 201, pressure transducer 202, processor 104.

The work process of the sphygomanometer in the embodiment of the present invention is as follows:

Described cuff is fixed on tested position；

Described air pump is utilized to inflate in described cuff；

During described air pump is inflated in described cuff, described pressure transducer is utilized to detect described cuff in real time In pressure, the pressure detected is exported to described processor；

The pressure utilizing described processor to input according to described pressure transducer, determines pressure waveform, according to described pressure Waveform determines described pressure value.

In order to detect pressure value more accurately, in an embodiment of the present invention, described processor is performing described When determining described pressure value according to described pressure waveform, for determining pulse wave from described pressure waveform, determine described pulse wave Peak swing, peak swing and described pressure waveform according to described pulse wave determine described pressure value.

In the present embodiment, along with inflating in cuff, cuff is the tightest with tested location contacts, and the amplitude of pulse wave is more By force, when reaching certain pressure in cuff, the amplitude of pulse wave reaches maximum, is further continued for inflation, and cuff can oppress quilt further Survey position so that blood vessel is the most blocked, and then the amplitude of pulse wave is more and more less, when the pressure of cuff reaches certain value ( As than shrink pressure exceed 30～50mmHg) time, blood vessel is totally blocked, and pulse wave amplitude is 0.The moment selecting amplitude maximum is Reference point, based on this puts, finds forward the point that amplitude is a times of peak swing, and pressure corresponding to this point is diastolic pressure, Finding the point of b times that amplitude is peak swing backward, the pressure corresponding to this point is for shrinking pressure, and the some institute fluctuating the highest is right The pressure answered is mean pressure, and wherein, a belongs to (0.3,0.8), and b belongs to (0.4,0.9), and occurrence can rule of thumb determine, Can also test current sphygomanometer and determine later, for example, a is 0.45, b is 0.75.

So that the pulse wave determined is more accurate, by Fourier analysis, pressure waveform can be processed, go Fall to disturb ripple.

In an embodiment of the present invention, described processor perform described in from described pressure waveform, determine pulse wave time, For converting according to pressure waveform described in formula a pair, it is thus achieved that the frequency-domain expression of described pressure waveform, according to described pressure The frequency-domain expression of Reeb shape, filters interference ripple in the range of predeterminated frequency in described pressure waveform, according to filtering interfering The pressure waveform of ripple, obtains described pulse wave, and wherein, described formula one is:

$F\left(\mathrm{\ω}\right)=\underset{-\mathrm{\∞}}{\overset{\mathrm{\∞}}{\∫}}f\left(t\right)e^{-i\mathrm{\ω}t}dt,$

F (ω) is the frequency-domain expression of described pressure waveform, and f (t) is the time-domain expression of described pressure waveform.

In the present embodiment, by formula one, the pressure waveform of time domain is transformed into frequency domain, removes interference ripple in a frequency domain. Here interference ripple is probably when for cuff inflation, and the inflation unit for inflation produces, and such as inflation unit is air pump, gas The vibrations of pump can form interference ripple in cuff, and this can make the pulse wave determined inaccurate, doing of the ripple that may be interfered Disturb.In the present embodiment, after removing interference ripple by formula one, then obtaining pulse wave, the pulse wave of acquisition is more accurate, and then The pressure value recorded is more accurate.

It addition, so that the pulse wave determined is more accurate, in an embodiment of the present invention, described processor is performing Described when determining pulse wave from described pressure waveform, in all wave bands determining described pressure waveform, amplitude shakes presetting Pulse wave band in the range of width, determines the basic waveform that each pulse wave band is corresponding, and each pulse wave band deducts the base of correspondence Plinth waveform, obtains described pulse wave；

Wherein, described wave band is the waveform between two minimum points of arbitrary neighborhood in described pressure waveform, wave band Amplitude is the maximum difference with the previous minimum of wave band of wave band, and described pulse wave band is that amplitude is in default amplitude range Wave band, described basic waveform is the described pressure waveform waveform when not having pulse wave described in superposition.

For example, inflation unit, when cuff inflation, is at the uniform velocity to inflate, and such as inflation unit is air pump, in cuff The pressure curve of pressure is as it is shown on figure 3, with the time as transverse axis in figure, with pressure as the longitudinal axis.As can be seen from Figure, this pressure The basic waveform of waveform is an oblique line, in superposition after pulse wave, occurs in that pulse wave band on pressure waveform.Point in figure A and some B is adjacent two minimum points, is wave band AB between some A and some B, puts the maximum point that C is wave band AB, the pressure of some C The amplitude that difference is wave band AB of the force value of force value and some A, wave band AB is pulse wave band.The ripple that straight line junction point A obtains with some B Basic waveform AB that section AB is corresponding, such as the dotted portion in Fig. 3, deducts wave band AB basic waveform AB and obtains one of pulse wave Point.

When inflation unit is to cuff inflation, not being at the uniform velocity to inflate, such as inflation unit is ball, by pressing rubber Ball is to cuff inflation.The pressure curve of the pressure in cuff is as shown in Figure 4.As can be seen from Figure, the base of this pressure waveform Plinth waveform is periodic curve, and in superposition after pulse wave, some part of curve there will be pulse wave band.Point D in figure Being adjacent two minimum points with an E, be wave band DE between some D and some E, some F is the maximum point of wave band DE, the pressure of some F The amplitude that difference is wave band DE of the force value of force value and some D.In figure some G and some H be adjacent two minimum points, some G and Being wave band GH between some H, some J is the maximum point of wave band GH, and the force value of some J is wave band GH's with the difference of the force value of some G Amplitude, wave band GH is pulse wave band.Periodicity according to basic waveform can be in the basic waveform of wave band GH reduction correspondence, such as figure Shown in middle dotted line GIH.Furthermore it is also possible to determine the basic waveform that pulse wave band is corresponding in the following manner: determine wave band GH Previous maximum point F and later maximum point K, determine the angle point M of straight line FG and straight line KH, connect GM and MH, GM and MH constitutes the basic waveform that pulse wave band GH is corresponding.

The embodiment of the present invention can be used in combination with the above-mentioned embodiment utilizing formula one to remove interference ripple, specifically, and place After interference ripple in the range of predeterminated frequency in pressure waveform is filtered by reason device, obtain the pressure waveform of filtering interfering ripple, this reality Executing example to process the pressure waveform of filtering interfering ripple, obtain pulse wave, two kinds of way of example are used in combination can enter one The accuracy of the pulse wave that step has increased access to, and then obtain pressure value more accurately.

In an embodiment of the present invention, also include: described detector unit is connected with described inflation unit；

When described detector unit detects the pressure in described cuff more than or equal to preset value, send to described inflation unit Stop the signal of inflation；

After described inflation unit receives the described signal stopping inflation, stop inflating in described cuff.

In the present embodiment, can rule of thumb arrange preset value, such as this preset value may be greater than contraction pressure 30～ 50mmHg.By this embodiment, can stop to cuff inflation the most in time, it is to avoid bigger damage is caused at tested position Evil.

As it is shown in figure 5, embodiments provide a kind of sphygomanometer, including:

Cuff 101, air pump 201, pressure transducer 202, processor 104, deflating cells 501；

Deflating cells 501 is connected with cuff 101；

Described deflating cells 501 is for releasing the gas in described cuff 101.

In the present embodiment, can quickly release the gas in cuff by deflating cells, reduce the infringement to tested position. Deflating cells can be provided in the air valve on cuff.Deflating cells can be connected with processor, when the pressure that processor receives When power reaches preset pressure value, control deflating cells and exit.

The work process of a kind of sphygomanometer that the embodiment of the present invention provides is as follows:

Described cuff is fixed on tested position；

Air pump is utilized to inflate in described cuff；

During described inflation unit is inflated in described cuff, pressure transducer is utilized to detect described cuff in real time In pressure, the pressure detected is exported to processor；

The pressure utilizing processor to input according to pressure transducer, determines pressure waveform；

Convert according to pressure waveform described in formula a pair, it is thus achieved that the frequency-domain expression of described pressure waveform；

According to the frequency-domain expression of pressure waveform, the interference ripple of predeterminated frequency scope in pressure waveform is filtered；

Determine filtering interfering ripple pressure waveform all wave bands in amplitude pulse wave band in default amplitude range；

Determine the basic waveform that each pulse wave band is corresponding；

Each pulse wave band is deducted the basic waveform of correspondence, it is thus achieved that described pulse wave；

Determining the peak swing of pulse wave, peak swing and pressure waveform according to pulse wave determine described pressure value.

Wherein, described wave band be filtering interfering ripple pressure waveform in arbitrary neighborhood two minimum points between ripple Shape, the amplitude of wave band is the maximum difference with the previous minimum of wave band of wave band, and described pulse wave band is that amplitude is being preset Wave band in amplitude range, described basic waveform is the pressure waveform of the filtering interfering ripple ripple when not having pulse wave described in superposition Shape.

As shown in Figure 6, embodiments provide a kind of method detecting blood pressure, including:

Step 601: inflate in the cuff being fixed on tested position；

Step 602: during inflation in described cuff, detects the pressure in described cuff in real time；

Step 603: the pressure according to detecting in described cuff determines pressure value.

In an embodiment of the present invention, described basis detects that the pressure in described cuff determines pressure value, including:

According to the pressure detected in described cuff, determine pressure waveform, determine described blood pressure according to described pressure waveform Value.

In the present embodiment, each pressure detected have correspondence time, time and one pressure spot of stress structure, All of pressure spot is constituted pressure waveform.Specifically, can be with the time as transverse axis, the longitudinal axis is pressure, generates pressure waveform.

In order to detect pressure value more accurately, in an embodiment of the present invention, described true according to described pressure waveform Fixed described pressure value, including:

From described pressure waveform, determine pulse wave, determine the peak swing of described pulse wave, according to described pulse wave Peak swing and described pressure waveform determine described pressure value.

The pressure waveform determined, in addition to the basic waveform constituted for cuff inflation and pulse wave, may also have interference Ripple, such as: the interference ripple that vibrations during air-pump inflating produce.So that the pulse wave determined is more accurate, can by with The lower embodiment interference ripple to removing in pressure waveform.

In an embodiment of the present invention, described from described pressure waveform, determine pulse wave, including:

Convert according to pressure waveform described in formula a pair, it is thus achieved that the frequency-domain expression of described pressure waveform；

According to the frequency-domain expression of described pressure waveform, by interference ripple in the range of predeterminated frequency in described pressure waveform Filter；

According to the pressure waveform of filtering interfering ripple, obtain described pulse wave；

Wherein, described formula one is:

$F\left(\mathrm{\ω}\right)=\underset{-\mathrm{\∞}}{\overset{\mathrm{\∞}}{\∫}}f\left(t\right)e^{-i\mathrm{\ω}t}dt,$

F (ω) is the frequency-domain expression of described pressure waveform, and f (t) is the time-domain expression of described pressure waveform.

Pulse wave and the frequency for the basic waveform of cuff inflation composition can obtain correspondence according to experiment or experience Frequency range, the waveform in this frequency range not may determine that as disturbing ripple, can specify to do by predeterminated frequency scope Disturbing the frequency of ripple, this predeterminated frequency scope can determine according to the frequency range that pulse wave is corresponding with basic waveform.Citing comes Saying, frequency range corresponding to basic waveform is 20-40Hz, and the frequency of pulse wave is 1-5Hz, then in the extraneous frequency of the two Scope may determine that as predeterminated frequency scope.

So that the pulse wave determined is more accurate, in an embodiment of the present invention, described from described pressure waveform Determine pulse wave, including:

Determine amplitude pulse wave band in default amplitude range in all wave bands of described pressure waveform；

Determine the basic waveform that each pulse wave band is corresponding；

Each pulse wave band is deducted the basic waveform of correspondence, it is thus achieved that described pulse wave；

Wherein, described wave band is the waveform between two minimum points of arbitrary neighborhood in described pressure waveform, wave band Amplitude is the maximum difference with the previous minimum of wave band of wave band, and described pulse wave band is that amplitude is in default amplitude range Wave band, described basic waveform is the described pressure waveform waveform when not having pulse wave described in superposition.

The implementation of the present embodiment may refer to Fig. 3 and Fig. 4.

The embodiment of the present invention can be used in combination with the above-mentioned embodiment utilizing formula one to remove interference ripple, specifically, and will After interference ripple in the range of predeterminated frequency filters in pressure waveform, obtain the pressure waveform of filtering interfering ripple, the present embodiment pair The pressure waveform of filtering interfering ripple processes, and obtains pulse wave, and two kinds of way of example are used in combination and can increase further The accuracy of the pulse wave obtained, and then obtain pressure value more accurately.

As it is shown in fig. 7, a kind of method detecting blood pressure that the embodiment of the present invention provides, including:

Step 701: inflate in the cuff being fixed on tested position；

Specifically, at the uniform velocity can be inflated in cuff by air pump.

Step 702: during inflation in cuff, the in real time pressure in detection cuff；

Specifically, the pressure in cuff can be detected by pressure transducer.

Step 703: according to the pressure detected in cuff, determine pressure waveform.

Specifically, when air pump at the uniform velocity inflation in cuff, in the case of not having other interference, pressure waveform is one Oblique line, the most at the uniform velocity pressure rise.In superposition after pulse wave, on this oblique line, some parts there will be the waveform of projection, The waveform of this projection is caused by pulse wave.Pressure waveform is also possible to be disturbed by air pump vibrations etc., in pressure waveform Also superposition can disturb ripple so that the pressure waveform finally given may be more complicated.

Step 704: convert according to a pair pressure waveform of formula, it is thus achieved that the frequency-domain expression of pressure waveform.

Different ripples specifically corresponding frequency range, for filtering interfering ripple, can obtain pressure by Fourier transformation The frequency-domain expression of waveform, determines the frequency-domain waveform of pressure waveform by frequency-domain expression, filters in frequency range in advance Interference ripple, obtains the pressure waveform of filtering interfering ripple.

Step 705: according to the frequency-domain expression of described pressure waveform, by described pressure waveform in the range of predeterminated frequency Interference ripple filter.

After filtering interfering ripple, simply pulse wave and the superposition of basic waveform in the pressure waveform of filtering interfering ripple, it is simple to Follow-up determine pulse wave.In the case of air pump is at the uniform velocity inflated in cuff, the pressure waveform of filtering interfering ripple is an oblique line With superposing of pulse wave.

Step 706: determine filtering interfering ripple pressure waveform all wave bands in amplitude arteries and veins in default amplitude range Fight wave band.

Wherein, wave band be filtering interfering ripple pressure waveform in arbitrary neighborhood two minimum points between waveform, ripple The maximum that amplitude is wave band of section and the difference of the previous minimum of wave band, pulse wave band is that amplitude is in default amplitude range Wave band.

The amplitude of the basic waveform that inflation is formed is the most more stable, has certain amplitude range, this amplitude range Can obtain according to experiment or experience.The waveform in this amplitude range not may determine that as pulse wave, basic waveform correspondence Amplitude range beyond amplitude range can be as default amplitude range.For example, the amplitude range of basic waveform is 30 ～50mmHg, default amplitude range can be the amplitude range beyond 30～50mmHg.

Step 707: determine the basic waveform that each pulse wave band is corresponding.

Wherein, basic waveform is the pressure waveform of the filtering interfering ripple waveform when not having pulse wave described in superposition.

Basic waveform is the waveform caused by cuff inflation, and when being the most at the uniform velocity cuff inflation, basic waveform is one Oblique line.Process for cuff inflation usually has regular, and all basic waveform are also to have rule.Can be according to basis ripple The rule of shape determines the basic waveform that each pulse wave band is corresponding, such as: basic waveform is periodic, at pressure waveform Incipient a period of time in, owing to the pressure in cuff is less, the most loose with tested location contacts, can't detect pulse wave, The rule of basic waveform can be determined according to pressure waveform interior during this period of time.Specifically, may refer to Fig. 3 and Fig. 4.

Step 708: each pulse wave band is deducted the basic waveform of correspondence, it is thus achieved that pulse wave.

Step 709: determine the peak swing of pulse wave, peak swing and pressure waveform according to pulse wave determine blood pressure Value.

Specifically, the moment selecting the amplitude maximum of pulse wave is reference point, based on this puts, finds forward pulse wave The point of a times that amplitude is peak swing, pressure corresponding to this point is diastolic pressure, and the amplitude finding pulse wave backward is maximum The point of b times of amplitude, the pressure corresponding to this point is for shrinking pressure, and the highest pressure corresponding to point that fluctuates is mean pressure, Wherein, a belongs to (0.3,0.8), and b belongs to (0.4,0.9), and occurrence can rule of thumb determine, it is also possible to current blood Pressure meter carries out testing determining later, for example, a is 0.45, and b is 0.75.

The method that the embodiment of the present invention provides can be realized by the arbitrary sphygomanometer in above-described embodiment.

Each embodiment of the present invention at least has the advantages that

1, in embodiments of the present invention, detector unit, during inflation unit is inflated in cuff, detects sleeve in real time Pressure in band, the pressure in the cuff that processor detects according to detector unit determines pressure value, say, that according to cuff Pressure in middle gas replenishment process can realize blood pressure detecting, after current detection unit collects required data, and can be from quilt Survey position and remove cuff or to cuff Rapid degassing, decrease cuff blocking time to the blood vessel at tested position, reduce The infringement that health is caused.

2, in embodiments of the present invention, by formula one, the pressure waveform of time domain is transformed into frequency domain, removes in a frequency domain Interference ripple.Here interference ripple is probably when for cuff inflation, and the inflation unit for inflation produces, and such as inflation unit is Air pump, the vibrations of air pump can form interference ripple in cuff, and this can make the pulse wave determined inaccurate, may be interfered The interference of ripple.In embodiments of the present invention, after removing interference ripple by formula one, then obtaining pulse wave, the pulse wave of acquisition is more Add accurately, and then the pressure value recorded is more accurate.

It should be noted that in this article, the relational terms of such as first and second etc is used merely to an entity Or operation separates with another entity or operating space, and not necessarily require or imply existence between these entities or operation The relation of any this reality or order.And, term " includes ", " comprising " or its any other variant are intended to non- Comprising of exclusiveness, so that include that the process of a series of key element, method, article or equipment not only include those key elements, But also include other key elements being not expressly set out, or also include being consolidated by this process, method, article or equipment Some key elements.In the case of there is no more restriction, statement the key element " including " and limiting, do not arrange Except there is also other same factor in including the process of described key element, method, article or equipment.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can be passed through The hardware that programmed instruction is relevant completes, and aforesaid program can be stored in the storage medium of embodied on computer readable, this program Upon execution, perform to include the step of said method embodiment；And aforesaid storage medium includes: ROM, RAM, magnetic disc or light In the various medium that can store program code such as dish.

Last it should be understood that the foregoing is only presently preferred embodiments of the present invention, it is merely to illustrate the skill of the present invention Art scheme, is not intended to limit protection scope of the present invention.All made within the spirit and principles in the present invention any amendment, Equivalent, improvement etc., be all contained in protection scope of the present invention.

Claims (10)

1. a sphygomanometer, it is characterised in that including:

Cuff, inflation unit, detector unit, processor；Wherein,

Described inflation unit is all connected with described cuff with described detector unit；

Described processor is connected with described detector unit；

Described inflation unit is for inflating in described cuff；

Described detector unit, for during described inflation unit is inflated in described cuff, detects in described cuff in real time Pressure, the pressure detected is exported to described processor；

Described processor pressure in the described cuff inputted according to described detector unit, determines pressure value.

Sphygomanometer the most according to claim 1, it is characterised in that

Described processor, the pressure in the described cuff inputted according to described detector unit, determine pressure waveform, according to institute State pressure waveform and determine described pressure value.

Sphygomanometer the most according to claim 2, it is characterised in that

Described processor perform described determine described pressure value according to described pressure waveform time, for from described pressure waveform Determining pulse wave, determine the peak swing of described pulse wave, peak swing and described pressure waveform according to described pulse wave are true Fixed described pressure value.

Sphygomanometer the most according to claim 3, it is characterised in that

Described processor perform described from described pressure waveform, determine pulse wave time, be used for according to pressure described in formula a pair Waveform converts, it is thus achieved that the frequency-domain expression of described pressure waveform, according to the frequency-domain expression of described pressure waveform, by described In pressure waveform, the interference ripple in the range of predeterminated frequency filters, and according to the pressure waveform of filtering interfering ripple, obtains described pulse Ripple, wherein, described formula one is:

$F\left(\mathrm{\ω}\right)=\underset{-\mathrm{\∞}}{\overset{\mathrm{\∞}}{\∫}}f\left(t\right)e^{-i\mathrm{\ω}t}dt,$

F (ω) is the frequency-domain expression of described pressure waveform, and f (t) is the time-domain expression of described pressure waveform.

Sphygomanometer the most according to claim 3, it is characterised in that

Described processor is when determining pulse wave described in performing from described pressure waveform, for determining the institute of described pressure waveform There is amplitude pulse wave band in default amplitude range in wave band, determine the basic waveform that each pulse wave band is corresponding, by each Pulse wave band deducts the basic waveform of correspondence, it is thus achieved that described pulse wave；

Wherein, described wave band is the waveform between two minimum points of arbitrary neighborhood in described pressure waveform, the amplitude of wave band For the difference of previous minimum of maximum and the wave band of wave band, described pulse wave band is amplitude ripple in default amplitude range Section, described basic waveform is the described pressure waveform waveform when not having pulse wave described in superposition.

6. the method detecting blood pressure, it is characterised in that including:

Inflate in the cuff being fixed on tested position；

During inflation in described cuff, detect the pressure in described cuff in real time；

Pressure according to detecting in described cuff determines pressure value.

Method the most according to claim 6, it is characterised in that

Described basis detects that the pressure in described cuff determines pressure value, including:

According to the pressure detected in described cuff, determine pressure waveform, determine described pressure value according to described pressure waveform.

Method the most according to claim 7, it is characterised in that

Described determine described pressure value according to described pressure waveform, including:

From described pressure waveform, determine pulse wave, determine the peak swing of described pulse wave, according to the maximum of described pulse wave Amplitude and described pressure waveform determine described pressure value.

Method the most according to claim 8, it is characterised in that

Described from described pressure waveform, determine pulse wave, including:

Convert according to pressure waveform described in formula a pair, it is thus achieved that the frequency-domain expression of described pressure waveform；

According to the frequency-domain expression of described pressure waveform, by interference ripple filter in the range of predeterminated frequency in described pressure waveform Remove；

According to the pressure waveform of filtering interfering ripple, obtain described pulse wave；

Wherein, described formula one is:

$F\left(\mathrm{\ω}\right)=\underset{-\mathrm{\∞}}{\overset{\mathrm{\∞}}{\∫}}f\left(t\right)e^{-i\mathrm{\ω}t}dt,$

F (ω) is the frequency-domain expression of described pressure waveform, and f (t) is the time-domain expression of described pressure waveform.

Method the most according to claim 8, it is characterised in that

Described from described pressure waveform, determine pulse wave, including:

Determine amplitude pulse wave band in default amplitude range in all wave bands of described pressure waveform；

Determine the basic waveform that each pulse wave band is corresponding；

Each pulse wave band is deducted the basic waveform of correspondence, it is thus achieved that described pulse wave；

Wherein, described wave band is the waveform between two minimum points of arbitrary neighborhood in described pressure waveform, the amplitude of wave band For the difference of previous minimum of maximum and the wave band of wave band, described pulse wave band is amplitude ripple in default amplitude range Section, described basic waveform is the described pressure waveform waveform when not having pulse wave described in superposition.