CN107752998A - Shrink pressure measuring device - Google Patents
Shrink pressure measuring device Download PDFInfo
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- CN107752998A CN107752998A CN201610702627.0A CN201610702627A CN107752998A CN 107752998 A CN107752998 A CN 107752998A CN 201610702627 A CN201610702627 A CN 201610702627A CN 107752998 A CN107752998 A CN 107752998A
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- 230000035488 systolic blood pressure Effects 0.000 claims abstract description 87
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 238000005259 measurement Methods 0.000 claims abstract description 35
- 230000017531 blood circulation Effects 0.000 claims abstract description 15
- 230000010412 perfusion Effects 0.000 claims description 62
- 238000000034 method Methods 0.000 claims description 50
- 238000001914 filtration Methods 0.000 claims description 33
- 210000001367 artery Anatomy 0.000 claims description 31
- 238000004364 calculation method Methods 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 6
- 230000008081 blood perfusion Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 description 19
- 230000008569 process Effects 0.000 description 15
- 238000004422 calculation algorithm Methods 0.000 description 13
- 230000036772 blood pressure Effects 0.000 description 8
- 210000004204 blood vessel Anatomy 0.000 description 8
- 230000002792 vascular Effects 0.000 description 8
- 239000008280 blood Substances 0.000 description 7
- 210000004369 blood Anatomy 0.000 description 7
- 101150034273 SYS1 gene Proteins 0.000 description 5
- 238000009530 blood pressure measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000035487 diastolic blood pressure Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000002555 auscultation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02108—Measuring pressure in heart or blood vessels from analysis of pulse wave characteristics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/02233—Occluders specially adapted therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/0225—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
- A61B5/0261—Measuring blood flow using optical means, e.g. infrared light
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
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- Pathology (AREA)
- Physiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Veterinary Medicine (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
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- Public Health (AREA)
- Vascular Medicine (AREA)
- Signal Processing (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Psychiatry (AREA)
- Ophthalmology & Optometry (AREA)
- Hematology (AREA)
- Dentistry (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention discloses one kind shrink pressure measuring device, added on the basis of conditional electronic sphygmomanometer photoelectric sensor carry out photoelectric signal collection, and by blood flow detection module and/or pulse detection module to systolic pressure at the beginning of between judge；Avoid directly read pressure sensor can by arm shake etc. interference；Its device realizes that simple, measurement is accurate, anti-interference strong, further can also maximum avoid individual sex differernce to influence caused by systolic pressure.
Description
Technical field
The present invention relates to medical electronics and non-invasive blood pressure fields of measurement, more particularly to a kind of contraction pressure measuring device.
Background technology
Blood pressure refers to lateral pressure of the blood to unit area vascular wall of intravascular flow, can reflect cardiac output or periphery
The suitable conditions of resistance, it is the important evidence of therapeutic effect etc. of clinically diagnosing the illness, observe.Non-invasive blood pressure measurement is conventional
Blood pressure detecting method, the non-invasive blood pressure measuring apparatus that clinic is commonly used at present mainly have mercurial sphygmomanometer and electronic sphygmomanometer, respectively
Using stethoscopy and oscillographic method as measuring principle.
At present, the measuring principle of most of electronic sphygmomanometers is oscillographic method, i.e., during to cuff inflation/deflation, with sleeve
Change with air pressure, Sasser occurs in pressure signal, and contraction is obtained according to the amplitude of Sasser, passing ratio Y-factor method Y
Pressure and diastolic pressure.Because the source of Sasser is more complicated, in addition to from the pulse wave for flowing through cuff pressure area, it is easy to
Comprising caused interference etc. is shaken by arm, in this case so that the accuracy of the pulse wave detected in oscillographic method is difficult to
It is protected, it is to solve this problem, main to include two kinds so as to influence measurement result：(i) according to interference characteristic in oscillographic method
Strong filtering is added in algorithm；(ii) oscillographic method algorithm is modified with reference to other specification.But the anti-interference knot of both of these approaches
Fruit is undesirable.On the other hand, differed greatly between human individual, the coefficient one for calculating systolic pressure and diastolic pressure is used in oscillographic method
As may be only available for majority of populations, and then measurement error is very big when measuring other inapplicable crowds.Above-mentioned factor all can shadow
Ring the accuracy of oscillographic method measurement result.
Conditional electronic sphygmomanometer, its functional structure as shown in figure 1, pressure sensor including main frame and its electrical connection and plus
Press cuff.The current pressurization cuff pressure of pressure sensor collection, abbreviation current pressure.
The content of the invention
It is an object of the invention to provide one kind to shrink pressure measuring device, can reduce the interference as caused by arm shake etc.,
Not brought by tested individual difference also further is influenceed.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
One kind shrinks pressure measuring device, including：Main frame and the pressurization cuff being connected electrically, and it is arranged on the pressurization
Pressure sensor on cuff, the main frame also electrically connect photoelectric sensor.The photoelectric sensor gathers photosignal；
Pressurization cuff is that arm is pressurizeed, and when starting deflation pressure release after the completion of pressurization, pressure sensor is started working, and is held
Continuous pressure of the collection from artery and preservation.
The main frame extracts characteristic signal come point between at the beginning of judging blood perfusion artery from the photosignal；
The pressure sensor chooses pressure corresponding to the sart point in time as systolic pressure.
When measuring systolic pressure, main frame extracts characteristic signal to judge from the photosignal of the collection of the photoelectric sensor
Point between at the beginning of blood perfusion artery.What the pressure sensor according to corresponding to point between at the beginning of selection at that time was collected
Pressure is systolic pressure.The pressure that current pressure sensor is collected is referred to as current pressure.
Preferably, the main frame also includes detection unit, for extracting the characteristic signal and judging the characteristic signal
Whether comprising the special parameter for persistently increasing or reducing in the scheduled time, the characteristic signal is then extracted in this way.
Preferably, the characteristic signal is perfusion degree signal, and the perfusion degree signal is arranged to exchange in the photosignal
The ratio of component and DC component.The detection unit also includes：Perfusion degree signal detection module, for from the photoelectric sensing
The perfusion degree signal is extracted in the photosignal of the collection of device, judges that artery is further according to the perfusion degree signal characteristic
It is no to start to be poured.
Preferably, the perfusion degree signal detection module also includes：Filtering unit, ratio calculation component and determination component；
The filtering unit is used to carry out bandpass filtering to photosignal, removes dc component and high frequency in photosignal
Composition, obtain the AC compounent；
The filtering unit is additionally operable to carry out LPF to photosignal, remove in photosignal the high frequency that includes into
Part, obtain the DC component；
The ratio calculation component is connected respectively with the ac output end and DC output end of the filtering unit, based on
Calculate the perfusion degree signal；
The determination component is connected with the ratio calculation component, for judging that the perfusion degree signal not for 0 value, then enters
Enter next judgement；
The determination component is additionally operable to judge whether the perfusion degree signal persistently increases, and is the then perfusion degree signal pair
It is the sart point in time between seasonable.
Preferably, the characteristic signal is pulse signal, and the pulse signal is arranged to exchange point in the photosignal
The wave character of amount.The detection unit also includes pulse signal detection module, for the institute gathered from the photoelectric sensor
State and the pulse signal is extracted in photosignal, whether persistently to increase judgement dynamic further according to the amplitude of waveform in the pulse signal
Whether arteries and veins, which starts, is poured, and is used as the sart point in time using the starting position of the waveform.
Preferably, the pulse signal detection module includes：Reference component, waveform extracting component and waveform differentiation group
Part；
The reference component is used to before the pressurization cuff is not actuated detect and updates detected person's pulse signal
Range value and pulse frequency value；
The waveform extracting component is used to carry out bandpass filtering to the photosignal, removes straight in the photosignal
Flow component and High-frequency Interference, obtain the AC compounent that can reflect blood flow mechanical periodicity；
The waveform differentiates that component is used for, and using the range value as amplitude reference, judges whether have in the AC compounent
Whether waveform continuously occurs, and is, set with differing for the pulse frequency value according to the interval between the waveform continuously occurred
In the range of, judge whether the waveform is the pulse signal；
The waveform differentiates that component is additionally operable to judge whether the wave-shape amplitude of the pulse signal persistently increases according to waveform,
If so, the sart point in time of blood perfusion artery is then used as using the starting position of the pulse signal.
Preferably, the main frame also includes：
Comparing unit, the pressure collected for the pressure sensor corresponding to comparing two sart point in times described above
Force value, take the conduct systolic pressure of wherein maximum.
In order to solve the above-mentioned technical problem, the present invention also uses following technical scheme：
One kind shrinks the pressure sensing on pressure measuring device, including main frame and its pressurization cuff and pressurization cuff of electrical connection
Device, artery downstream position of the photoelectric sensor for the cuff homonymy that is fixed on and pressurizes, the main frame also electrically connect photoelectricity
Sensor, the device also include：
Perfusion degree signal detection module, for extracting perfusion degree signal from the collection of the photoelectric sensor, further according to
Perfusion degree signal characteristic judges whether artery starts to be poured；
First measurement output unit, is electrically connected with the perfusion degree signal detection module, for being filled according to the beginning
The result of determination of note obtains the collection signal of the pressure sensor, exports systolic pressure or the first systolic pressure.
Preferably, the device also includes：
Pulse signal detection module, for extracting wave character from the collection of the photoelectric sensor, further according to waveform
Feature judges whether pulse signal occurs；
Second measurement output unit, is electrically connected with the pulse signal detection module, for being gone out according to the pulse signal
Existing result of determination obtains the collection signal of the pressure sensor, exports the second systolic pressure；
Comparing unit, output end and second of two inputs respectively with the first measurement output unit measure the defeated of output unit
Go out end connection, for more all inputs, take the conduct systolic pressure of wherein maximum.
Preferably, shrinking pressure measuring device also includes：Oscillographic method measurement module, output end connect the of the comparing unit
Three inputs, for measuring the 3rd systolic pressure of acquisition according to oscillographic method and exporting to the comparing unit.
Compared with prior art, the invention has the advantages that：
Enhance antijamming capability during systolic pressure measurement.Due to for judge systolic pressure occur characteristic parameter be not from
Extracted in cuff pressure signal, therefore evaded in oscillographic method and having been disturbed caused by interference and arm shake as caused by shaking cuff
Deng so that the device has stronger antijamming capability, improves the accuracy of systolic pressure measurement.
Brief description of the drawings
Fig. 1 is the illustrative view of functional configuration of conditional electronic sphygmomanometer；
Fig. 2 is the functional framework schematic diagram that the present invention shrinks pressure measuring device；
Fig. 3 is the functional module block schematic illustration of main frame in Fig. 2；
Fig. 4 is the schematic flow sheet for the method for work for shrinking pressure measuring device；
Fig. 5 is that main frame measures control program schematic flow sheet in Fig. 2 shown devices；
Fig. 6 is that main frame measures the schematic flow sheet of control program embodiment one in Fig. 2 shown devices；
Fig. 7 is that main frame measures the schematic flow sheet of control program embodiment two in Fig. 2 shown devices；
Fig. 8 is to determine the schematic diagram of systolic pressure by the change of pulse wave in the specific embodiment of the invention；
Fig. 9 is to determine the schematic diagram of systolic pressure by the change of AC/DC values in the specific embodiment of the invention；
Figure 10 is that main frame measures the schematic flow sheet of control program embodiment three in Fig. 1 shown devices；
Figure 11 is the functional module block schematic illustration of main frame in another embodiment of the present invention.
Wherein reference：1- main frames, 2- pressure sensors, 3- pressurization cufves, 4- photoelectric sensors, 11- comparing units,
12- first measures output unit, and 13- second measures output unit, 14- perfusion degree signal detection modules；15- pulse signals detect
Module；16- detection units；141- filtering units；142- ratio calculation components；143 determination components；151- reference components；
152 waveform extracting components；153- waveforms differentiate component.
Embodiment
Below with reference to accompanying drawing, various embodiments of the present invention are given with further elaboration.
First, systolic pressure Fundamentals of Measurement of the present invention is illustrated：
When measuring blood pressure using stethoscopy, cuff is first fixed on upper arm brachial dance position, and it is straight to cuff inflation
Blood vessel below to cuff is shriveled completely, is then gradually deflated；With the decline of cuff pressure, blood is washed open and is flattened again
Blood vessel, send with beat identical rhythm and pace of moving things sound aroused in interest, be referred to as Korotkoff's Sound.When hearing the first sound Korotkoff's Sound by stethoscope pair
The pressure value answered is designated as systolic pressure, and pressure value corresponding to the general Korotkoff's Sound disappearance moment is designated as diastolic pressure.This method is checking institute
There is the clinical criteria of non-invasive blood pressure measuring (including with oscillographic method electronic sphygmomanometer).The present invention comes from mathematics corresponding to the Foundation
Model, it turn avoid the drawbacks of stethoscopy human error is big.
Second, the explanation of pressure measuring device is shunk to the present invention：
As illustrated in the accompanying drawings from 1 to 3, in the first embodiment, the present invention shrinks base of the pressure measuring device in conditional electronic sphygmomanometer
The photoelectric sensor 4 electrically connected with main frame 1, including main frame 1 and its pressure sensor 2 of electrical connection, photoelectric transfer are added on plinth
Sensor 4 and pressurization cuff 3.Photoelectric sensor 4 is also known as photoelectric probe.
As shown in Figure 2, wherein main frame 1, an embodiment concrete structure is as shown in figure 3, including for exporting systolic pressure
Comparing unit 11, an input of comparing unit 11 are sequentially connected electrically the first measurement output unit 12 and perfusion degree signal detection mould
Block 14, and another input of comparing unit 11 is sequentially connected electrically the second measurement output unit 13 and pulse signal detection module
15, wherein：
Photoelectric sensor 4, for gathering photosignal when artery is irrigated again.In a preferred embodiment, it is solid
The artery downstream position with the pressurization homonymy of cuff 3 is scheduled on, more can accurately gather corresponding photosignal.
Main frame 1 also includes detection unit 16, and for extracting characteristic signal, simultaneously whether judging characteristic signal includes the scheduled time
The interior lasting special parameter for increasing or reducing, then extracts characteristic signal in this way.
The detection unit 16 is provided with perfusion degree signal detection module 14, for being extracted from the collection of photoelectric sensor 4
Perfusion degree signal, judge whether to start to be poured further according to perfusion degree signal characteristic.
As shown in Figure 3, perfusion degree signal detection module 14 also includes：Filtering unit 141, the and of ratio calculation component 142
Determination component 143.
Filtering unit 141 is used to carry out bandpass filtering to photosignal, removes dc component and high frequency in photosignal
Composition, obtain AC compounent；
Filtering unit 141 is additionally operable to carry out LPF to photosignal, removes the high-frequency components included in photosignal,
Obtain DC component；
Ratio calculation component 142 is connected respectively with the ac output end and DC output end of filtering unit 141, for calculating
Go out the ratio R of degree of perfusion signal, i.e. AC compounent and DC component.
Determination component 143 is connected with ratio calculation component 142, for judging perfusion degree signal not for 0 value, then into next
Judge；
Determination component 143 is additionally operable to judge whether perfusion degree signal persistently increases, if the single signal of non-continuous increase,
Situation when its form is irrigated again with artery misfits, and may be interference signal.If so, then it is believed that the perfusion degree signal
Effectively, point between at the beginning of corresponding to the time started as arterial perfusion using the perfusion degree signal.
As shown in Figure 3, the detection unit 16 is additionally provided with pulse signal detection module 15, for from photoelectric sensor 4
Wave character is extracted in the photosignal of collection, judges whether pulse signal occurs further according to wave character, and then judge artery
Whether start to be poured.
Pulse signal detection module 15 includes：Reference component 151, waveform extracting component 152 and waveform differentiate component
153；
Reference component 151 be used to pressurizeing cuff 3 it is not actuated before, i.e. systolic pressure measurement starts preceding first to detect and update quilt
The range value and pulse frequency value of tester's pulse signal, judge whether the base for pulse signal occur in being measured successively as systolic pressure
It is accurate.
Waveform extracting component 152 be used for photosignal carry out bandpass filtering, remove photosignal in DC component and
High-frequency Interference, obtain the AC compounent that can reflect blood flow mechanical periodicity.
Waveform differentiates that component 153 is used for, and using range value as amplitude reference, judges whether have in AC compounent (wave character)
Waveform continuously occurs, and is, whether the interval between the waveform that basis continuously occurs is differed in setting range with pulse frequency value,
Judge whether waveform is pulse signal.
Waveform differentiates that component 153 is additionally operable to judge whether the wave-shape amplitude of pulse signal persistently increases according to waveform；If it is not,
It may be then invalid wave character.If so, the wave character is pulse signal, filled using the starting position of pulse signal as blood flow
Point between at the beginning of note artery.
It is pointed out that above-mentioned filtering unit 141, ratio calculation component 142 and determination component 143 and reference
Component 151, waveform extracting component 152 and waveform differentiate component 153；In various embodiments, independent function can be passed through
Circuit implements, and can also be realized by corresponding programme-control main frame 1.
Main frame 1 also includes：
First measurement output unit 12, is electrically connected with perfusion degree signal detection module 14, for according to starting what is be poured
Result of determination obtains the collection signal of pressure sensor 2, exports systolic pressure or the first systolic pressure.
Second measurement output unit 13, is electrically connected with pulse signal detection module 15, for what is occurred according to pulse signal
Result of determination obtains the collection signal of pressure sensor 2, exports the second systolic pressure；
Comparing unit 11, output end and second of two inputs respectively with the first measurement output unit 12 measure output unit
13 output end connection, for more all inputs, takes the conduct systolic pressure of wherein maximum.
Further, the device also includes：Oscillographic method measurement module, the 3rd input of output connection comparing unit 11,
For measuring the 3rd systolic pressure of acquisition according to oscillographic method and exporting to comparing unit 11.
The present invention shrinks pressure measuring device directly by connecing the photoelectric sensor 4 set on script custodial care facility come subsidiary
Systolic pressure, extra annex, circuit, module etc. need not be increased in addition to photoelectric sensor 4, implementation is simple, cost is low.
As shown in accompanying drawing 1-2, accompanying drawing 11, as another embodiment, one kind shrinks pressure measuring device, including main frame 1
And its pressure sensor 2 on the pressurization cuff 3 and pressurization cuff 3 of electrical connection, photoelectric sensor 4 are used for the sleeve that is fixed on and pressurizes
Artery downstream position with 3 homonymies；Main frame 1 also electrically connects photoelectric sensor 4, and the device also includes：
Perfusion degree signal detection module 14, for extracting perfusion degree signal from the collection of photoelectric sensor 4, further according to filling
Note degree signal characteristic judges whether artery starts to be poured；
First measurement output unit 12, is electrically connected with perfusion degree signal detection module 14, for according to starting what is be poured
Result of determination obtains the collection signal of pressure sensor 2, exports systolic pressure or the first systolic pressure.
In the present embodiment, the device also includes：
Pulse signal detection module 15, it is special further according to waveform for extracting wave character from the collection of photoelectric sensor 4
Sign judges whether pulse signal occurs；
Second measurement output unit 13, is electrically connected with pulse signal detection module 15, for what is occurred according to pulse signal
Result of determination obtains the collection signal of pressure sensor 2, exports the second systolic pressure；
Comparing unit 11, output end and second of two inputs respectively with the first measurement output unit 12 measure output unit
13 output end connection, for more all inputs, takes the conduct systolic pressure of wherein maximum.
In the present embodiment, shrinking pressure measuring device also includes：Oscillographic method measurement module, output end connection comparing unit 11
The 3rd input, the 3rd systolic pressure and exported for measuring to obtain according to oscillographic method to comparing unit 11.It is a variety of by gathering
Different characteristic parameters judges the process of arterial perfusion and state, and main frame 1 more can accurately judge arterial perfusion
Sart point in time, to obtain systolic pressure the most accurate.
3rd, in order to which the operation principle for shrinking pressure measuring device is described in more detail, now the measurement that the device uses is shunk
Pressure method illustrates：
Preferably, also persistently increase or subtract including whether judging characteristic model is included in the scheduled time when extracting characteristic signal
Small special parameter, then extracts characteristic signal in this way.
Preferably, photoelectric sensor 4 is fixed on the artery downstream position with the homonymy of cuff 3 that pressurizes.
Further, characteristic signal includes but is not limited to the AC compounent and/or DC component for removing High-frequency Interference, bag
Include but be not restricted to following algorithm：
When characteristic signal is perfusion degree signal, the perfusion degree signal is arranged to AC compounent and direct current point in photosignal
The ratio of amount.The ratio can be directly reacted when cuff carries out bleed, to artery when blood is fed into artery again
Pressure, i.e. systolic pressure.
Determine that sart point in time is further comprising the steps of：
Bandpass filtering：Bandpass filtering is carried out to newest photosignal, removes dc component and high frequency in photosignal
Composition, obtain AC compounent；
Low-pass filtering treatment is carried out to newest photosignal, removes the high-frequency components included in photosignal, is obtained straight
Flow component；
Calculate ratio of the AC compounent with respect to DC component；
Perfusion degree signal is judged not for 0 value, then is judged into next, it is necessary to which extraction perfusion degree information then returns to band logical repeatedly
Filter step；
Judge that current perfusion degree signal is compared with ratio before whether to start to continue increase, be to search for the ratio to hold
The starting point of continuous increase, the time corresponding to the starting point is sart point in time.
When characteristic signal is pulse signal, pulse signal is the wave character of AC compounent in photosignal.Judge bag
Include according to the waveform of pulse wave in pulse signal to judge whether to occur pulse signal and position occur with first pulse signal
As sart point in time.The prototype of the algorithm is consistent with stethoscopy, and the pressure that pressure sensor 2 collects when there is pulse is
Systolic pressure.
This method first passes through reference component 151 and detects and update detected person just before cuff inflation oppresses artery
The range value and pulse frequency value of normal pulse wave.
Determine that sart point in time is further comprising the steps of：
Bandpass filtering：Bandpass filtering is carried out to newest photosignal, removes DC component and high frequency in photosignal
Interference, obtains the pulse signal that can reflect blood flow mechanical periodicity；
Using range value as amplitude reference, judge whether there is waveform continuously to occur in pulse signal, be then to enter in next step, it is no
Then return to bandpass filtering step；
According to differing whether in setting range for the interval between the waveform continuously occurred and pulse frequency value, judge that waveform is
No is pulse wave, is, the crest location of first pulse wave, the position correspondence arteries and veins are searched in the continuous pulse wave occurred
Signal of fighting occurs, and otherwise returns to bandpass filtering step.
Amplitude reference refers to that the amplitude when pulse signal beyond the designated ratio of range value, then judges there is ripple in pulse signal
Shape continuously occurs, and otherwise judges do not have waveform continuously to occur；Designated ratio is a value, preferably 20% in 10% to 30%.
- the 50% to 50% of the preferred pulse frequency value of setting range.
In addition, the present invention also includes on the basis of the oscillographic method algorithm of any of the above independent algorithm and existing electronic sphygmomanometer
：
Integration algorithm
This method drawn by various algorithms at the beginning of between point be more than two, in addition to：When comparing more than two and starting
Between point corresponding to current pressure, take wherein pressure value maximum as systolic pressure.The difference so particularly avoided between individual causes
Correctness problem, such as：Due to the difference between individual, photoplethysmographic from scratch process and vascular perfusion degree from
(most of individual is reduced near systolic pressure together the time relationship and on-fixed that the process of 0 value increase nearby occurs in cuff pressure
When there are the two phenomenons, but then first there is the process that vascular perfusion degree increases rapidly from minimum in some individuals, then occur
Photoplethysmographic process from scratch, or appearance order are opposite), i.e. the first systolic pressure sys1 and the second systolic pressure
Sys2 relation is not fixed, then can be according to the principle of determination systolic pressure in stethoscopy (by judging Ke Shiyin from scratch
Process determines systolic pressure), last systolic pressure is used as using the greater in sys1 and sys2.
Specifically, as shown in Figure 5, the method for work of pressure device is shunk in present invention measurement, specifically by systolic pressure of the present invention
The control of main frame 1 performs in measurement apparatus, is realized by control program, specifically includes following steps：
Step 101, respectively by being fixed on cuff and the measured pressure signal of photoelectric sensor 4 and the reflection of homonymy (arm)
The photosignal of blood flow change；
Position (but not limited to) where cuff being bundled in the arteria brachialis of subject, and be connected with baroceptor；
Photoelectric sensor 4 is fixed on the artery downstream position with cuff homonymy, such as finger position, and is connected with main frame 1, is recorded
Photosignal.
Main frame 1 controls is inflated designated value to cuff, then controls the air pressure reduced in cuff to terminate until measuring, and
Record the cuff pressure signal of the process；Meanwhile photoelectric sensor 4 records the change letter of the flow of blood in blood vessel below
Breath, that is, reflect the photosignal of blood flow situation of change.
In main frame 1, the cuff pressure signal and photosignal collected is amplified, filtered and analog-to-digital conversion is located in advance
Reason.Low-pass filtering treatment is carried out to cuff pressure signal, the AC compounent wherein included is removed and (refers mainly to pulse letter therein
Number), obtain clean cuff pressure signal.
Step 102, according to photosignal, determine blood vessel blocked by cuff after blood restart to flow through the time of blood vessel
Point；
The present invention is changed to determine systolic pressure by the blood flow of cuff homonymy artery during analysis measurement.In cuff
In the blood vessel of pressure area downstream portion, blood flow can change with the change of cuff pressure, and be existed by photoelectric sensor 4
The photosignal that pressure area downstream portion recorded can reflect the situation of change of the blood flow just.
Step 103, cuff pressure value corresponding to above-mentioned time point is obtained, and in this, as systolic pressure.
The including but not limited to following three kinds of specific implementations of above-mentioned steps 102：
(i) pulse signal algorithm is detected
In above-mentioned steps 102, when cuff pressure is more than systolic pressure, random pulse wave occurs in pulse signal, and
Start the pulse wave of occurrence law in pulse signal when cuff pressure is equal to or slightly less than systolic pressure, the schematic diagram of the feature is such as
Shown in accompanying drawing 8；According to this feature, systolic pressure is determined by the change of the pulse signal in photosignal.
Referring to Fig. 6, specifically, the specific embodiment of method of work first of present invention measurement contraction pressure device, passes through light
The change of pulse signal in electric signal determines that the processing method of systolic pressure specifically shrinks the master in pressure measuring device by the present invention
The control of machine 1 performs, and is realized by corresponding control program, specifically includes following steps：
Step 201, bandpass filtering is carried out to newest photosignal, removes DC component DC and high frequency in photosignal
Interference, obtains the pulse signal that can reflect blood flow situation of change；
Step 202, before to cuff deflation, detect and update the amplitude refMag and pulse frequency refPr of photoelectric sphyg ripple,
And as the amplitude reference and pulse frequency reference for judging that pulse wave reappears；
Step 203, into the cuff deflation stage, in cuff pressure since at the time of designated value reduces, using refMag as
Amplitude reference, judge whether there is waveform continuously to occur in photosignal, if it is determined that having occurred, then carry out step 204, otherwise enter
Row step 201；
Step 204, referred to by pulse frequency of refPr, whether the waveform for judging continuously to occur is pulse wave, if these waveforms
Between interval be consistent substantially with refPr, then it is assumed that be pulse wave, carry out step 205, otherwise it is assumed that not being, and return to execution
Step 201；
Step 205, the crest location of first pulse wave is searched in the continuous pulse wave occurred, the position correspondence
Cuff pressure value is as systolic pressure.
The measuring principle of the used detection pulse signal algorithm of systolic pressure monitoring device of the present invention is with stethoscopy (by sentencing
Process determines systolic pressure to disconnected Ke Shiyin from scratch) it is consistent so that the very close auscultation value of systolic pressure that this method determines, carry
The high accuracy of systolic pressure measurement.
(ii) blood flow signal algorithm is detected
In above-mentioned steps 102, when cuff pressure is more than systolic pressure, arteria brachialis is flattened, and has blocked blood to flow through, now
The arteries perfusion of cuff downstream part is obstructed, and the perfusion degree of blood vessel is very weak herein (far below the normal value before being obstructed, connects
It is bordering on zero)；When cuff pressure is equal to or slightly less than systolic pressure, blood begins to flow through pressure area, now cuff downstream part
Arteries perfusion degree gradually increases (returns to normal value, it rises change comparatively fast, and depends on from script close to zero value
Cuff deflation speed).According to this feature, the arterial vascular perfusion that can reflect cuff downstream part is calculated by photosignal
The parameter of degree, this parameter are perfusion degree signal (AC/DC), and as shown in Figure 9, Far Left is to add to the schematic diagram of the parameter characteristic
Curve when pressing through journey cuff pressure not less than systolic pressure, it is middle close to the low-lying of " 0 " be to be pressurized above systolic pressure and deflated
Journey cuff pressure exceedes curve during systolic pressure, and rightmost is the curve that deflation course cuff pressure is less than after systolic pressure, according to
The change of perfusion degree signal (AC/DC) value can determine that systolic pressure.
AC is to remove the dc component and high-frequency components, obtained AC compounent in photosignal.DC is removal optical telecommunications
The high-frequency components included in number, obtain DC component
Referring to Fig. 7, specifically, the specific embodiment of method of work second of present invention measurement contraction pressure device, passes through light
Electric signal timesharing calculates AC/DC values, and determines systolic pressure sys2 processing method specifically by the present invention according to the change of AC/DC values
The control of main frame 1 shunk in pressure measuring device performs, and is realized by corresponding control program, specifically includes following steps：
Step 301, bandpass filtering is carried out to newest photosignal, remove dc component in photosignal and high frequency into
Part, obtain AC compounent AC；
Step 302, low-pass filtering treatment is carried out to newest photosignal, remove the high frequency that is included in photosignal into
Part, obtain DC component DC；
Step 303, ratio calculated r=AC/DC；
Step 304, if r values before nearby continue for some time in 0 value, step 305 is carried out, is otherwise continued
Carry out step 301；
Step 305, whether ratio r starts to continue increase with value before, if it is carries out step 306, if not
Then continue step 301；
Step 306, the starting point that the ratio r persistently increases is searched for, cuff pressure value corresponding to the starting point can be used as systolic pressure.
Another detection pulse signal algorithm, its measuring principle and stethoscopy used by systolic pressure monitoring device of the present invention
It is basically identical (by judging that process determines systolic pressure to Ke Shiyin from scratch) so that the systolic pressure that this method determines is also very
Close to auscultation value, the accuracy that systolic pressure measures is improved.
(iii) integration algorithm
(oscillographic method that may include prior art) obtains multiple time points in several ways respectively in above-mentioned steps 102
When, blood pressure corresponding to step 103 more multiple time points obtains maximum, and the measured value of systolic pressure and defeated is used as using the maximum
Go out.Such as：
The specific embodiment of method of work the 3rd of pressure device is shunk in present invention measurement, has in the first specific embodiment and second
Last comparison blood pressure is added on the basis of body embodiment is parallel and obtains maximum, the measurement of systolic pressure is used as using the maximum
The step of being worth and exporting.It includes two processing procedures：On the one hand, it can reflect that the pulse wave that blood flow volume changes is believed by analysis
Number, by judging that process determines possible systolic pressure 1 (sys1) to photoelectric sphyg ripple from scratch；On the other hand, by photoelectricity
Signal of change can directly reflect the parameter of vascular perfusion situation --- AC compounent AC and DC component DC ratio in photosignal
Value, possible systolic pressure 2 (sys2) is determined by judging process that vascular perfusion degree increases rapidly from minimum.Due to individual
Between difference, photoplethysmographic from scratch process and vascular perfusion degree from when the process of 0 value increase nearby occurs
Between relation and on-fixed (most of individual is reduced near systolic pressure in cuff pressure while the two phenomenons occurs, but has a few
Then first there is the process that vascular perfusion degree increases rapidly from minimum in body, photoplethysmographic mistake from scratch then occurs
Journey, or appearance order are opposite), i.e. sys1 and sys2 relation are not fixed, then can be according to determination systolic pressure in stethoscopy
Principle (by judging that process determines systolic pressure to Ke Shiyin from scratch), last receipts are used as using the greater in sys1 and sys2
Contractive pressure.
Referring to Fig. 10, the specific embodiment of method of work the 3rd of pressure device is shunk in present invention measurement, pass through two kinds of methods
The processing method compared to determine specifically shrinks the main frame 1 in pressure measuring device by the present invention and controls execution, and journey is controlled by corresponding
Sequence is realized, specifically includes following steps：
Step 401, in arteria brachialis position binding cuff and access host 1；
Step 402, photoelectric probe is fixed (i.e. in cuff homonymy downstream：Photoelectric sensor 4) and access host 1；
Step 403, main frame 1 is deflated to control after cuff inflation to designated value, and records cuff pressure change；Enter simultaneously
Two branches below：
(i) current pressure detection branches
Step 405, cuff pressure signal is pre-processed；
Step 406, low-pass filtering treatment is carried out to cuff pressure signal, into step 410；
(ii) point in time measurement branch
Step 404, the light that main frame 1 controls photoelectric probe luminous and blood flow and CBF change in acquisition and recording reflection blood vessel
Electric signal；
Step 407, photosignal is pre-processed, while enters step 408 and 409；
Step 408, the first systolic pressure or corresponding time point are determined by the change of photoelectric sphyg ripple, into step 410；
Step 409, the second systolic pressure or corresponding time point are determined by AC/DC ratio value changes, into step 410；
Step 410, systolic pressure is determined：Select maximum conduct systolic pressure.
The present invention contraction pressure measuring device by using photoelectric sensor gather artery pressurization cuff loosen after again
Optoelectronic information when being irrigated, and between being obtained at the beginning of systolic pressure according to the information, avoid and directly read pressure sensing
Easily shaken during device numerical value or arm shaking interference and individual difference caused by pressure value there is the problem of deviation, make receipts
The measurement of contractive pressure is more accurate.
The above, only presently preferred embodiments of the present invention, are not intended to limit embodiment of the present invention, and this area is general
Lead to central scope and spirit of the technical staff according to the present invention, can very easily carry out corresponding flexible or modification, therefore originally
The protection domain of invention should be defined by the protection domain required by claims.
Claims (10)
1. one kind shrinks pressure measuring device, including：Main frame and the pressurization cuff being connected electrically, and it is arranged on the pressurization sleeve
The pressure sensor taken, it is characterised in that the main frame also electrically connects photoelectric sensor；
The photoelectric sensor gathers photosignal；
The main frame extracts characteristic signal come point between at the beginning of judging blood perfusion artery from the photosignal；
The pressure sensor chooses pressure corresponding to the sart point in time as systolic pressure.
2. pressure measuring device is shunk as claimed in claim 1, it is characterised in that the main frame also includes detection unit, is used for
Extract the characteristic signal and judge whether the characteristic signal includes the special parameter for persistently increasing or reducing in the scheduled time,
The characteristic signal is then extracted in this way.
3. pressure measuring device is shunk as claimed in claim 2, it is characterised in that the characteristic signal is perfusion degree signal, should
Perfusion degree signal is arranged to the ratio of AC compounent and DC component in the photosignal；The detection unit also includes：Fill
Note degree signal detection module, for extracting the perfusion degree letter in the photosignal of the collection from the photoelectric sensor
Number, judge whether artery starts to be poured further according to the perfusion degree signal characteristic.
4. pressure measuring device is shunk as claimed in claim 3, it is characterised in that the perfusion degree signal detection module also wraps
Include：Filtering unit, ratio calculation component and determination component；
The filtering unit be used for photosignal carry out bandpass filtering, remove photosignal in dc component and high frequency into
Part, obtain the AC compounent；
The filtering unit is additionally operable to carry out LPF to photosignal, removes the high-frequency components included in photosignal, obtains
To the DC component；
The ratio calculation component is connected respectively with the ac output end and DC output end of the filtering unit, for calculating
The perfusion degree signal；
The determination component is connected with the ratio calculation component, for judging the perfusion degree signal not for 0 value, then under entering
One judges；
The determination component is additionally operable to judge whether the perfusion degree signal persistently increases, be then the perfusion degree signal to it is corresponding when
Between be the sart point in time.
5. pressure measuring device is shunk as claimed in claim 2, it is characterised in that the characteristic signal is pulse signal, described
Pulse signal is arranged to the wave character of AC compounent in the photosignal；The detection unit also includes pulse signal and detected
Module, for extracting the pulse signal in the photosignal that is gathered from the photoelectric sensor, further according to the pulse
Whether the amplitude of waveform, which persistently increases, in signal judges whether artery starts to be poured, and using the starting position of the waveform as
The sart point in time.
6. pressure measuring device is shunk as claimed in claim 5, it is characterised in that the pulse signal detection module includes：Base
Quasi- reference component, waveform extracting component and waveform differentiate component；
The reference component is used to before the pressurization cuff is not actuated detect and updates the amplitude of detected person's pulse signal
Value and pulse frequency value；
The waveform extracting component is used to carry out bandpass filtering to the photosignal, removes the direct current point in the photosignal
Amount and High-frequency Interference, obtain the AC compounent that can reflect blood flow mechanical periodicity；
The waveform differentiates that component is used for, and using the range value as amplitude reference, judges whether there is waveform in the AC compounent
It is continuous to occur, it is whether the interval between the waveform that basis continuously occurs is differed in setting range with the pulse frequency value
It is interior, judge whether the waveform is the pulse signal；
The waveform differentiates that component is additionally operable to judge whether the wave-shape amplitude of the pulse signal persistently increases according to waveform, if
It is that the sart point in time of blood perfusion artery is then used as using the starting position of the pulse signal.
7. contraction pressure measuring device as claimed in any one of claims 1 to 6, it is characterised in that the main frame also includes：
Comparing unit, the pressure collected for the pressure sensor corresponding to comparing two sart point in times described above
Value, take the conduct systolic pressure of wherein maximum.
8. one kind shrinks the pressure sensing on pressure measuring device, including main frame and its pressurization cuff and pressurization cuff of electrical connection
Device, it is characterised in that the main frame also electrically connects photoelectric sensor, and the photoelectric sensor is same for the cuff that is fixed on and pressurizes
The artery downstream position of side, the device also include：
Perfusion degree signal detection module, for extracting perfusion degree signal from the collection of the photoelectric sensor, further according to perfusion
Degree signal characteristic judges whether artery starts to be poured；
First measurement output unit, is electrically connected with the perfusion degree signal detection module, for starting what is be poured according to described
Result of determination obtains the collection signal of the pressure sensor, exports systolic pressure or the first systolic pressure.
9. device as claimed in claim 8, it is characterised in that the device also includes：
Pulse signal detection module, for extracting wave character from the collection of the photoelectric sensor, further according to wave character
Judge whether pulse signal occurs；
Second measurement output unit, is electrically connected with the pulse signal detection module, for what is occurred according to the pulse signal
Result of determination obtains the collection signal of the pressure sensor, exports the second systolic pressure；
Comparing unit, two inputs measure the output end of output unit with the output end of the first measurement output unit and second respectively
Connection, for more all inputs, take the conduct systolic pressure of wherein maximum.
10. device as claimed in claim 9, it is characterised in that the device also includes：Oscillographic method measurement module, output end connect
The 3rd input of the comparing unit is connect, compares list to described for measuring to obtain the 3rd systolic pressure and export according to oscillographic method
Member.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109998510A (en) * | 2019-04-08 | 2019-07-12 | 深圳市贝斯曼精密仪器有限公司 | A kind of blood pressure detector and blood pressure detecting method |
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| US20090326411A1 (en) * | 2001-04-30 | 2009-12-31 | Per Kristian Eide | Method for analysing pressure signals derivable from a body cavity |
| CN101703396A (en) * | 2009-11-06 | 2010-05-12 | 中国科学院合肥物质科学研究院 | Radial artery pulse wave based cardiovascular function parameter detection and analysis method and detection device |
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