CN202397456U - Dynamic blood pressure measuring device - Google Patents

Abstract

The utility model discloses a dynamic blood pressure measuring device, which comprises a pulse wave acquisition probe, a data processing analog circuit unit and a dynamic sphygmomanometer main body. The pulse wave acquisition probe is electrically connected with the data processing analog circuit unit, the data processing analog circuit unit is electrically connected with the dynamic sphygmomanometer main body, the pulse wave acquisition probe acquires blood pressure data and transmits the blood pressure data to the data processing analog circuit unit, the data processing analog circuit unit preprocesses the received data, the preprocessed data are transmitted to the dynamic sphygmomanometer main body, and the dynamic sphygmomanometer main body processes the pulse wave data and calculates numerical values of blood pressure. The dynamic blood pressure measuring device can dynamically monitor the blood pressure, reduces requirements to postures of a user, can measure the blood pressure of the user in a normal daily life, and can monitor the blood pressure of the user all day long without affecting the normal daily life of the user basically.

Description

The ambulatory blood pressure measuring device

[technical field]

This utility model belongs to the blood pressure measurement technical field, relates to a kind of device of dynamic output blood pressure values, specifically is that a kind of pulse wave transmission speed method of utilizing is carried out the device that the non-intrusion type continuous blood pressure is measured.

[background technology]

At present, blood pressure measuring device commonly used has mercurial sphygmomanometer, based on the electric sphygmomanometer of vibration measuring method etc., and these sphygomanometers all need the cuff that can inflate, it is surrounded on measured's the arm measures.Announce about the patent of this type of blood pressure measuring device is existing, for example United States Patent (USP) 4625277,5215096 and 6602200 etc.All unload theoretical based on the electric sphygmomanometer of vibration measuring method and Ke's formula sound method of mercurial sphygmomanometer employing based on blood vessel.Counting example based on the electronic blood pressure of vibration measuring method, when static pressure in the cuff during greater than systolic pressure, tremulous pulse is closed, the impact of cuff endogenous cause of ill near-end pulse and the wave of oscillation by a small margin occurs; When static pressure during less than systolic pressure, wave amplitude increases gradually; When static pressure equaled mean arterial pressure, ductus arteriosus wall was in load condition, and it is maximum that wave amplitude reaches.Static pressure during less than mean arterial pressure wave amplitude reduce gradually, after venous pressure was less than diastolic pressure, ductus arteriosus wall was in relaxing period fully expansion, wave amplitude maintains less level.So just can obtain easypro arteriotony through the automatic measurement of pressure transducer.

Cuff formula blood pressure measuring method is widely used clinically; But there is following shortcoming in cuff formula sphygomanometer: the first, charge and discharge process of gas needs; This has just determined to measure a blood pressure need spend the long time, and the blood pressure signal between twice blood pressure measurement process can't obtain monitoring, and fluctuation has taken place blood pressure during this period of time probably; Blood pressure signal will be omitted like this, and obviously the timing blood pressure measurement in past can't satisfy the demands.The second, cuff is surrounded on and charges and discharge gas on the arm, can cause measured's sense of discomfort, especially under frequent situation about measuring, when serious, even can measured's tissues such as skin be caused damage.Therefore, need a kind of novel non-cuff formula dynamic hemomanometer of development.

The continuous non-invasive blood pressure measurement is the measurement of in each cardiac cycle, accomplishing blood pressure.Occurred some noinvasive continuous blood pressure monitoring methods at present, wherein a kind of method utilizes the pulse wave transmission speed to come calculating blood pressure exactly.The intermittence of heart is shunk diastole and is penetrated blood and will produce from arterial root portion, along the pulse wave of arterial rete propagation.(Pulse wavevelocity PWV) is meant that pulse refers to just that along the speed of tremulous pulse conduction pulse wave is transmitted to the speed of another point along tube wall from a specified point of tremulous pulse to the pulse wave transmission speed.Correlational study proves that the pulse wave transmission speed is relevant with blood pressure, United States Patent (USP) 5649543,5865543 and 6599251 and some other patent documentation openly utilize pulse wave transmission time or pulse wave transmission speed to predict the method for blood pressure.

At present, the acquisition methods of pulse wave transmission speed mainly comprises following several types: pulse wave transmission speed method is calculated in the single armed sampling of (1) sampling wrist radial artery and arm brachial artery place pulse wave; (2) sampling wrist radial artery combines the electrocardiosignal characteristic point to calculate the pulse wave velocity method; (3) utilize the pulse wave velocity computational methods of photoelectricity volume descriptive method sampling fingertip pulse wave signal.

Above-mentioned (2) plants the sampling pulse wave, and the advantage of measuring blood pressure according to the pulse wave transmission speed is to realize dynamic monitoring, farthest obtains blood pressure information, the omission of critical data can not occur; And this method does not need cuff, the body injury of so just having avoided long-time repeated measure to cause.But the existing method of utilizing the pulse wave transmission speed to measure blood pressure also has the deficiency of himself, mainly contain following some:

The first, pulse wave will be calibrated to different user, just sets up the relation of pulse wave transmission speed and measured's blood pressure, even and same user also need regularly calibrate, with raising blood pressure measurement precision.But collimation technique existing problems; Pulse wave through the tremulous pulse point-to-point transmission calculates the pulse wave transmission speed; The pressure value that recorded through the cuff sphygomanometer is at that time calibrated, and in using afterwards, might squint in the position of sampled point; So just having a length of vessel is the error of pulse wave transmission range, and it will directly cause the increase of final blood pressure output error.If overcome this error, need when each the use, calibrate, but obviously be pretty troublesome.

The second, sampling deficient in stability; Because the method for sampling is generally selected the wrist radial artery for use or is passed through photoelectricity volume descriptive method sampling fingertip pulse wave; These activities for human body are relatively more responsive; Therefore require the measured during measuring, to keep static, this is unfavorable for realizing 24 hours dynamic monitoring.

[summary of the invention]

For solving the above-mentioned technical problem that prior art exists, the utility model discloses a kind of ambulatory blood pressure measuring device based on left and right sides brachial pulse ripple transmission time difference.

This utility model is taked following technical scheme: the ambulatory blood pressure measuring device; Comprise pulse wave acquisition probe, simulation of data processing circuit unit, dynamic hemomanometer main part; The pulse wave acquisition probe is electrically connected with the simulation of data processing circuit unit; The simulation of data processing circuit unit is electrically connected with the dynamic hemomanometer main part, and the pulse wave acquisition probe is gathered blood pressure data and is transferred to the simulation of data processing circuit unit, and the simulation of data processing circuit unit carries out pretreatment with the data that receive; And preprocessed data sent to the dynamic hemomanometer main part, the dynamic hemomanometer main part is carried out the processing of pulse wave data and the calculating of blood pressure values.

Described ambulatory blood pressure measuring device; The dynamic hemomanometer main part comprises data acquisition unit, data processing unit, data output unit and control unit; Data acquisition unit links to each other and communication with the simulation of data processing circuit unit; Data acquisition unit links to each other with data processing unit; Data processing unit links to each other with data output unit, control unit again, and described data acquisition unit becomes the manageable digital signal of data processing unit with the analog signal conversion of simulation of data processing circuit unit collection; Data processing unit is handled the pulse wave signal of data acquisition unit output, calculates blood pressure values, to the output of data output unit, has the function of sending instruction to control unit simultaneously; Control unit offers data processing unit with measurement result, is used for calibration; The data output unit is with the final pressure value and the pulse waveform output of data processing unit transmission.

Described ambulatory blood pressure measuring device, data acquisition unit adopts AD converter.

Described ambulatory blood pressure measuring device, the data output unit adopts the LCD liquid crystal display screen.

Described ambulatory blood pressure measuring device, the pulse wave acquisition probe adopts pulse wave sensor, is output as ultra-weak electronic signal.

Described ambulatory blood pressure measuring device, pulse wave sensor adopts the difference pulse wave sensor of two collection points.

Described ambulatory blood pressure measuring device, data processing unit directly are plugged on the described ambulatory blood pressure machine main part.

The invention also discloses a kind of ambulatory blood pressure measuring method based on left and right sides brachial pulse ripple transmission time difference, it carries out as follows:

At first, the pulse wave wave sensor is attached at left and right arms brachial artery place, sampling left and right arms brachial pulse ripple signal converts numerical signal to through A/D;

Then, judge whether it is to use for the first time, if then begin calibration process: utilize blood pressure measuring to take blood pressure, record first characteristic blood pressure, second characteristic blood pressure successively, then get into and wait for and read the A/D transformation result; If not, then wait for and read the A/D transformation result;

After waiting for and reading the A/D transformation result, carry out data filtering successively, calculate phase contrast, calculating blood pressure, system filter;

Then, judge whether the protocols having request, if then request msg output gets into pulse wave, blood pressure, pulse frequency output and demonstration again; If not, then get into pulse wave, blood pressure, pulse frequency output and demonstration;

At last, be back to and wait for and read the A/D transformation result.

The theoretical basis of this utility model is: because most human hearts are taken back; This has just determined to arrive from heart the distance difference of left and right sides arm brachial artery; And this segment distance difference relative fixed with regard to each is individual, pulse wave arrives left and right arms brachial artery collection point has so just had a stable transmission range poor.Thereby, recording corresponding pulse wave transmission time after the recovery, carry out initialization in conjunction with electric sphygmomanometer and demarcate, just can set up the relation of pulse wave transmission speed and blood pressure.

The measurement of this utility model ambulatory blood pressure has overcome traditional cuff type sphygomanometer can't dynamic monitoring and charge and discharge the shortcoming that the gas operation possibly cause damage to measured's when injected organism tissue; Also realize the monitoring of blood pressure under the normal activity situation and reduced the ambulatory blood pressure monitoring calibration frequency; It can realize that whole day continues to monitor blood pressure; And because measured's non-strenuous exercise is less to the fluctuation that this device blood pressure output valve causes, so this blood pressure measuring device is less to the influence of measured's daily routines.

This utility model ambulatory blood pressure is measured can monitor blood pressure dynamically, and reduces the requirement to gauger's attitude, can in orthobiosis, measure, and convenience realizes 24 hours whole-day blood pressure monitorings and do not influence measured's orthobiosis basically.In addition, be a constant basis because each individual left and right arms brachial artery arrives the range difference of heart, so just avoided the common measurement error that causes owing to two point measurement variable in distance in the blood pressure measuring device based on pulse wave transmission speed method.

[description of drawings]

Fig. 1 is the structural representation of this utility model ambulatory blood pressure measuring device.

Fig. 2 is the structured flowchart of this utility model dynamic hemomanometer main part.

Fig. 3 is a left and right arms brachial pulse ripple transmission time difference sketch map.

Fig. 4 is a pulse wave acquisition probe structural design drawing.

Fig. 5 is the upward view of pulse wave acquisition probe.

Fig. 6 is the left view of pulse wave acquisition probe.

Fig. 7 is the circuit diagram of this utility model simulation of data processing circuit unit.

Fig. 8 is the flow chart of this utility model ambulatory blood pressure measuring method.

[specific embodiment]

Below in conjunction with accompanying drawing and specific embodiment this utility model is described further.

With reference to Fig. 1, the ambulatory blood pressure measuring device comprises pulse wave acquisition probe 101, simulation of data processing circuit unit 102, dynamic hemomanometer main part 103.Pulse wave acquisition probe 101 and simulation of data processing circuit unit 102 are electrically connected through custom interface, and simulation of data processing circuit unit 102 is electrically connected with dynamic hemomanometer main part 103.Wherein, pulse wave acquisition probe 101 can adopt flexible material making such as pvdf membrane, also can be the pulse wave sensor that encapsulation such as photodiode, piezoelectric ceramic piece form, and is output as ultra-weak electronic signal.Present embodiment adopts the difference pulse wave sensor, shown in Fig. 4-6, and the preferred design of adopting two collection points, it can carry out difference processing to signal, compares the collection pulse wave signal that existing pulse wave sensor can be more stable.The two arm brachial artery places that pulse wave acquisition probe 101 is attached at the measured respectively (make the arteries length difference of measuring the pulse wave transmission time difference keep constant; Avoided the measurement error that causes because of sampled point skew), be responsible for gathering blood pressure data and also be transferred to simulation of data processing circuit unit 102.Pulse wave sensor can be attached at arm brachial artery place and not need cuff, can not damage human body (gluing getting final product, adopt medical rubberized fabric adhere also can).Simulation of data processing circuit unit 102 can directly be plugged on the main part 103, also can link to each other with main part 103 through lead.Simulation of data processing circuit unit 102 carries out pretreatment with left and right sides brachial artery signal, comprises amplification, filtering processing such as (comprising difference), and preprocessed data is sent to dynamic hemomanometer main part 103.The circuit theory of simulation of data processing circuit unit 102 sees Fig. 7 for details.Main part 103 is carried out the processing of pulse wave data and the calculating and the output of blood pressure values.

With reference to Fig. 2; Dynamic hemomanometer main part 103 comprises data acquisition unit 201, data processing unit 202, data output unit 203 and nominal data input block; Data acquisition unit 201 links to each other and communication with simulation of data processing circuit unit 102; Data acquisition unit 201 links to each other with data processing unit 202 electricity, and data processing unit 202 links to each other with data output unit 203, nominal data input block 204 electricity again.The prior art that can adopt above-mentioned data acquisition unit 201, data processing unit 202, data output unit 203 and nominal data input block 204 realizes that they are made on the same circuit board usually.For example, data acquisition unit 201 can adopt various AD converters, and the analog signal conversion that it is responsible for simulation of data processing circuit unit 102 is gathered is to data processing unit 202 manageable digital signals.It is that core is built that data processing unit 202 can adopt with various microprocessors; Be responsible for the pulse wave signal of data acquisition unit 201 outputs is handled; Calculate blood pressure values; To data output unit 203 output, have simultaneously and accept nominal data that nominal data input block 204 transmits and be used for pressure value and calculate.Nominal data input block 204 is responsible for input calibration data when using first, usually the preferred keyboard in nominal data unit.Data output unit 203 can adopt various digitized output instruments, like the LCD liquid crystal display screen, is responsible for final pressure value and pulse waveform output with data processing unit 202 transmission.

Concrete measuring process: at first, two pulse wave acquisition probe 101 secured in parallel in arm brachial artery place, so just can be guaranteed that the range difference of two tremulous pulse sampled points arrival hearts remains unchanged, avoid pulse wave transmission range error.Because when left and right sides sampled point symmetry, sampled point arrives the heart range difference by the decision of heart off-center position degree, and heart off-center degree is a definite value with regard to individual, and this has also just determined the pulse wave transmission time difference to be a definite value, and is as shown in Figure 3.Then, with main part 103, simulation of data processing circuit unit 102 through fabrics such as belt fixing with measured's health on, can begin to carry out the measurement of blood pressure.

The pulse wave wave sensor is attached at left and right arms brachial artery place, and sampling left and right arms brachial pulse ripple transmission time difference has improved pulse wave transmission time difference sampling precision.Utilize sphygomanometer to calibrate, this need use first with later use in regularly be generally every month once, utilize sphygomanometer numerical value and pulse wave transmission time opening relationships equation, and write down equation coefficient (blood pressure that vide infra calculating).At first use traditional sphygomanometer to record two characteristic pressure value P0 and P1; Be input to data processing unit 202 through nominal data input block 204; At this moment the program of data processing unit 202 can be in the demarcation subprogram; Data processing unit 202 can the acquisition front end pulse wave signals calculates measures the pulse wave transmission time differences, sets up the relation equation of pulse wave transmission time and blood pressure, and equation coefficient is stored in the internal memory goes.So just accomplished primary calibration.In most cases, obtain blood pressure and pulse wave transmission time relation equation coefficient, do not needed sphygomanometer to calibrate.

The pulse wave data acquisition:

1, two pulse wave acquisition probe 101 are attached at arm brachial artery place, the left and right sides and obtain faint pulse wave signal;

2,201 pairs of front end signals of data acquisition unit carry out the analog circuit date processing, comprise filter circuit, amplifying circuit etc.;

3, analog to digital conversion circuit becomes digital signal with the analog signal conversion of data acquisition unit 201 outputs, and this paper analog-digital converter is included in data processing unit 202.

Through these three steps, the pulse wave digital signal has been gathered completion.

The data handling procedure of pulse wave comprises:

1, digital filtering comprises medium filtering etc., and these digital filter programs are very ripe, more common, no longer detail.

2, the calculating of cycle T: computation of Period is calculated through judging pulse wave digital signal peak value, calculates adjacent peaks sampled point time difference and is pulse wave cycle T.

3, the calculating of phase contrast

; Calculate the phase contrast of two-way pulse wave data; Owing to the two-way pulse wave signal is converted to for digital signal, is assumed to be Y [n], X [n].So just can adopt the method for Digital Signal Processing to calculate through data processing unit 202, preferred scheme be to utilize DFT to calculate phase contrast, also can adopt crest to detect, and promptly monitors the method for two paths of signals crest sampled point time difference.The scheme of DFT calculating blood pressure is: two-way pulse wave digital signal is DFT respectively calculates, directly calculate the first phase of first-harmonic, do difference then and obtain phase contrast.Computational process is following:

$X\left(m\right)=\underset{n=0}{\overset{N-1}{\mathrm{\Σ}}}x\left(n\right)e^{(-j2\mathrm{\πnm}/N)}$ (1)

$=\underset{n=0}{\overset{N-1}{\mathrm{\Σ}}}x\left(n\right)[\cos (2\mathrm{\πnm}/N)-j\sin (2\mathrm{\πnm}/N)]$

Wherein n is a sampling number, and m is an overtone order, gets 1 here.

The real part that makes X (m) is Re [X (m)], and imaginary part is Im [X (m)], then can calculate the signal first phase:

In like manner can calculate other one road signal initial phase:

Then

(4)

$=\left(\frac{\mathrm{Im}\left[X\left(m\right)\right]\mathrm{Re}\left[Y\left(m\right)\right]-\mathrm{Im}\left[Y\left(m\right)\right]\mathrm{Re}\left[X\left(m\right)\right]}{\mathrm{Im}\left[X\left(m\right)\right]\mathrm{Im}\left[Y\left(m\right)\right]-\mathrm{Re}\left[Y\left(m\right)\right]\mathrm{Re}\left[X\left(m\right)\right]}\right)$

(4) formula is the phase contrast result of calculating.

4, convert phase contrast into time difference; Suppose that transmission time difference is t, then

The calculating of blood pressure: existing document and patent has been proved the blood pressure amount and pulse conduction time variable quantity is directly proportional.So also just can estimate the variable quantity of blood pressure according to the variable quantity in pulse wave transmission time.Suppose that blood pressure is P, the transmission time is t, then can get following formula:

ΔP＝aΔt P-P ₀＝a(t-t ₀) (5)

P＝at-(at ₀+P ₀) (6)

Formula (2.9) can be reduced to P=at-b (7)

So just can find out that blood pressure and transmission time roughly are once linear relationships; And the parameters such as blood vessel wall thickness of human body can be thought and can not change in the short time; So just can through once or traditional blood pressure measurement repeatedly come a that gets parms, b, calculate the ambulatory blood pressure value by formula (2.10) then.

Electric sphygmomanometer is very ripe at present, utilizes traditional sphygomanometer to measure a blood pressure values, substitution formula 7, and the phase contrast in conjunction with 4 formulas are calculated can calculate parameter a, b.Data processing unit 202 just can be exported blood pressure values in real time like this.

Compare with existing sphygomanometer, the blood pressure parameter measuring device that this utility model provides has the advantage that can realize comfortable measurement and reduce the calibration number of times, and it can be worn on measured's the body easily, and can measured's daily life not impacted.

Referring to Fig. 8, the invention also discloses a kind of method of measuring based on the ambulatory blood pressure of left and right sides brachial pulse ripple transmission time difference, step is following:

At first, the pulse wave wave sensor is attached at left and right arms brachial artery place, sampling left and right arms brachial pulse ripple signal converts numerical signal to through A/D;

Then, judge whether it is to use for the first time, if use first need be calibrated the beginning calibration process: utilize blood pressure measuring to take blood pressure, record first characteristic blood pressure, second characteristic blood pressure successively, then get into and wait for and read the A/D transformation result; If not, then wait for and read the A/D transformation result;

After waiting for and reading the A/D transformation result, carry out data filtering successively, calculate phase contrast, calculating blood pressure, system filter;

Then, judge whether the protocols having request, if then request msg output gets into pulse wave, blood pressure, pulse frequency output and demonstration again; If not, then get into pulse wave, blood pressure, pulse frequency output and demonstration;

At last, be back to and wait for and read the A/D transformation result.

In the aforementioned process:

Calculate phase contrast : the phase contrast that calculates two-way pulse wave data; Owing to the two-way pulse wave signal is converted to for digital signal, is assumed to be Y [n], X [n].So just can adopt the method for Digital Signal Processing to calculate through data processing unit 202, preferred scheme be to utilize DFT to calculate phase contrast, also can adopt crest to detect, and promptly monitors the method for two paths of signals crest sampled point time difference.The scheme of DFT calculating blood pressure is: two-way pulse wave digital signal is DFT respectively calculates, directly calculate the first phase of first-harmonic, do difference then and obtain phase contrast.Computational process is following:

$X\left(m\right)=\underset{n=0}{\overset{N-1}{\mathrm{\Σ}}}x\left(n\right)e^{(-j2\mathrm{\πnm}/N)}$ (1)

$=\underset{n=0}{\overset{N-1}{\mathrm{\Σ}}}x\left(n\right)[\cos (2\mathrm{\πnm}/N)-j\sin (2\mathrm{\πnm}/N)]$

Wherein n is a sampling number, and m is an overtone order, gets 1 here.

The real part that makes X (m) is Re [X (m)], and imaginary part is Im [X (m)], then can calculate the signal first phase:

In like manner can calculate other one road signal initial phase:

Then

(4)

$=\left(\frac{\mathrm{Im}\left[X\left(m\right)\right]\mathrm{Re}\left[Y\left(m\right)\right]-\mathrm{Im}\left[Y\left(m\right)\right]\mathrm{Re}\left[X\left(m\right)\right]}{\mathrm{Im}\left[X\left(m\right)\right]\mathrm{Im}\left[Y\left(m\right)\right]-\mathrm{Re}\left[Y\left(m\right)\right]\mathrm{Re}\left[X\left(m\right)\right]}\right)$

(4) formula is the phase contrast result of calculating.

Convert phase contrast into time difference; Suppose that transmission time difference is t, then

Calculating blood pressure: existing document and patent has been proved the blood pressure amount and pulse conduction time variable quantity is directly proportional.So also just can estimate the variable quantity of blood pressure according to the variable quantity in pulse wave transmission time.Suppose that blood pressure is P, the transmission time is t, then can get following formula:

ΔP＝aΔt P-P ₀＝a(t-t ₀) (5)

P＝at-(at ₀+P ₀) (6)

Formula (2.9) can be reduced to P=at-b (7)

So just can find out that blood pressure and transmission time roughly are once linear relationships; And the parameters such as blood vessel wall thickness of human body can be thought and can not change in the short time; So just can through once or traditional blood pressure measurement repeatedly come a that gets parms, b, calculate the ambulatory blood pressure value by formula (2.10) then.

System filter and data filtering are simple data filtering, remove High-frequency Interference and make digital signal more stable, and this is a current techique, no longer details.

The method that this utility model ambulatory blood pressure is measured can be carried out based on this utility model ambulatory blood pressure measuring device, also can independently carry out.

More than combine specific preferred embodiment at length to set forth this utility model.Yet description that these are detailed and concrete example only are a kind of explanations but not to the qualification of this utility model, for those of ordinary skills, obviously can make various modification and distortion in this utility model scope according to these detailed explanations.

Claims (7)

1. ambulatory blood pressure measuring device; It is characterized in that comprising pulse wave acquisition probe, simulation of data processing circuit unit, dynamic hemomanometer main part; The pulse wave acquisition probe is electrically connected with the simulation of data processing circuit unit; The simulation of data processing circuit unit is electrically connected with the dynamic hemomanometer main part, and the pulse wave acquisition probe is gathered blood pressure data and is transferred to the simulation of data processing circuit unit, and the simulation of data processing circuit unit carries out pretreatment with the data that receive; And preprocessed data sent to the dynamic hemomanometer main part, the dynamic hemomanometer main part is carried out the processing of pulse wave data and the calculating of blood pressure values.

2. ambulatory blood pressure measuring device as claimed in claim 1; It is characterized in that: described dynamic hemomanometer main part comprises data acquisition unit, data processing unit, data output unit and control unit; Data acquisition unit links to each other and communication with the simulation of data processing circuit unit; Data acquisition unit links to each other with data processing unit; Data processing unit links to each other with data output unit, control unit again, and described data acquisition unit becomes the manageable digital signal of data processing unit with the analog signal conversion of simulation of data processing circuit unit collection; Data processing unit is handled the pulse wave signal of data acquisition unit output, calculates blood pressure values, to the output of data output unit, has the function of sending instruction to control unit simultaneously; Control unit offers data processing unit with measurement result, is used for calibration; The data output unit is with the final pressure value and the pulse waveform output of data processing unit transmission.

3. ambulatory blood pressure measuring device as claimed in claim 2 is characterized in that: described data acquisition unit adopts AD converter.

4. ambulatory blood pressure measuring device as claimed in claim 2 is characterized in that: described data output unit adopts the LCD liquid crystal display screen.

5. ambulatory blood pressure measuring device as claimed in claim 1 is characterized in that: described pulse wave acquisition probe adopts pulse wave sensor, is output as ultra-weak electronic signal.

6. ambulatory blood pressure measuring device as claimed in claim 5 is characterized in that: described pulse wave sensor adopts the difference pulse wave sensor of two collection points.

7. ambulatory blood pressure measuring device as claimed in claim 1 is characterized in that: described data processing unit directly is plugged on the described ambulatory blood pressure machine main part.

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