CN101810475B - Electronic auscultation sphygmomanometer based on combination of Korotkoff sound method and oscillometric method - Google Patents
Electronic auscultation sphygmomanometer based on combination of Korotkoff sound method and oscillometric method Download PDFInfo
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Abstract
The invention relates to an electronic auscultation sphygmomanometer based on combination of a Korotkoff sound method and an oscillometric method, solving the following problems: the manual auscultation sphygmomanometer is not convenient to carry, and Korotkoff sound auscultation is not easy to operate and is easily affected by the environment. The electronic auscultation sphygmomanometer comprises a cuff with a bladder inside, a sound pickup, an atmospheric pressure sensor, a signal processing unit, an inflation/deflation unit, a human-machine interaction unit and a microprocessor, wherein the microprocessor controls the inflation/deflation unit to inflate or deflate the cuff; after the atmospheric pressure signal obtained by the atmospheric pressure sensor and the Korotkoff sound signal obtained by the sound pickup are processed by the signal processing unit, the microprocessor firstly works out the range of the blood pressure by the oscillometric method, then searches for the Korotkoff sound signal in the range by a thresholding method to obtain the final blood pressure and finally controls the human-machine interaction interface to display the result. The sphygmomanometer can simultaneously ensure stability and precision of the measuring result and can be used in the blood pressure measurement field.
Description
Technical field
The present invention relates to a kind of sphygomanometer.
Background technology
At present, hypertension has become a key factor that in worldwide, jeopardizes health of masses, and hyperpietic's quantity of China is then up to 13% of China's total population, and is wherein in the majority with middle-aged and elderly people.Patients with hypertension needs often to measure pressure value, treats thereby rationally take depressor, thereby, convenient, blood pressure measurement is diagnosis and treats hypertensive key accurately.
Existing sphygomanometer mainly contains two types, and one type is the widely used artificial under-chin sphygomanometer of hospital, and another kind of is the widely used oscillographic method electric sphygmomanometer of family.
Artificial under-chin sphygomanometer; Mainly be divided into mercury column (mercury column) sphygomanometer and pointer sphygomanometer; The measurement mechanism of this type sphygomanometer is a Ke Shi sound auscultation; Promptly, in deflation course, monitor the Ke Shi sound that upper arm artery produces through stethoscope, and observe the piezometer indicating value and judge systolic pressure and diastolic pressure by the doctor through being connected with manometric inflation cuff compressing upper arm blood vessel.Ke Shi sound auscultation is the blood pressure measurement technical standard of association's approvals such as World Health Organization (WHO), international hypertension alliance, also is the measuring method that hospital and doctor extensively approve, its measurement result is used as clinical hypertension diagnosis and fractionated goldstandard.Yet; The measuring process of artificial under-chin sphygomanometer is comparatively complicated, and measurement result receives the influence of factors such as environment noise, hearing sensitivity and venting speed easily, and the volume of this sphygomanometer is big; Be inconvenient to carry; The people who does not possess rich experiences is difficult to use this type sphygomanometer, and therefore, artificial under-chin sphygomanometer is difficult to adopted by extensive family.
Oscillographic method electric sphygmomanometer, its measurement mechanism are oscillographic method (claiming the seismic wave method again), and promptly adopts pressure sensor obtains the fluctuation (pulse wave) of cuff air pressure in inflation or the deflation course, realize blood pressure measurement through the relation indirect ground of pulse wave amplitude and blood pressure.This electron-like sphygomanometer is simple to operate, and measurement result stability and concordance are higher, is usually used in testing oneself at home, and its measurement result can be used as the reference of blood pressure diagnosis.Yet the fatal shortcoming of oscillographic method electric sphygmomanometer is a measurement result poor accuracy, with a low credibility, only can satisfy error usually less than 10 millimetress of mercury, and this error will cause a large amount of mistaken diagnosis and fail to pinpoint a disease in diagnosis.Because oscillographic method is to realize blood pressure measurement through pulse wave indirectly; And pulse wave directly receives blood vessel wall hardness, the influence of factors such as cardiac valve situation, and measured's individual variation will cause measurement result to have constant error; And arm muscle is twitched or physical activity all can influence the pulse wave amplitude in the measuring process; Thereby cause measurement result inaccurate, therefore, the oscillographic method electric sphygmomanometer can only be as the blood pressure measurement reference; In America and Europe's part country, law forbids that the measurement result of hospital's such sphygomanometer of use is as the medical diagnosis on disease foundation.
Summary of the invention
The objective of the invention is to solve that artificial under-chin sphygomanometer is inconvenient to carry and Ke Shi sound auscultation is not easy to operate, problem affected by environment easily; And the big problem of oscillographic method electric sphygmomanometer measurement error, a kind of electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method is provided.
The electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method; It is made up of cuff, pick up, baroceptor, signal processing unit, inflation/deflation unit, man-machine interaction unit and microprocessor; Said cuff internal airbag; Said air bag is communicated with the inflation/deflation unit through airway; Air bag also is connected with baroceptor through airway, and the air pressure electrical signal of baroceptor connects the air pressure signal input of signal processing unit, and the Ke Shi tone signal outfan of pick up connects the Ke Shi tone signal input of signal processing unit; The signal output part of signal processing unit connects the signal input part of microprocessor; The ventilating control signal output part of microprocessor connects the unitary ventilating control signal input part of inflation/deflation, and the venting control signal output ends of microprocessor connects the unitary venting control signal of inflation/deflation input, and the data communication end of man-machine interaction unit connects the data communication end of microprocessor; Microprocessor is used to receive the startup measuring-signal from man-machine interaction unit, and after receiving said startup measuring-signal, output inflation signal is given the inflation/deflation unit; Behind its output inflation signal; The pulse wave signal and the air pressure signal of the output of continuous collecting signal processing unit; According to oscillographic method said pulse wave signal and air pressure signal are calculated then, obtain preliminary systolic pressure after, calculate maximum inflation pressure according to preliminary systolic pressure; And when said air pressure signal reached said maximum inflation pressure, end of output inflation signal was given the inflation/deflation unit; After signal was inflated in the said end of output, pulse wave signal, air pressure signal and the Ke Shi tone signal of the output of continuous collecting signal processing unit stopped to gather when said air pressure signal is lower than 50mmHg, and exported the signal of exitting fast and give the inflation/deflation unit; Then according to said pulse wave signal and air pressure signal; Utilize oscillographic method to obtain the scope of systolic pressure and the scope of diastolic pressure, in the scope of the scope of said systolic pressure and diastolic pressure, the passing threshold method is searched the Ke Shi tone signal again; Obtain the appearance point and the end point of Ke Shi sound; The appearance point of said Ke Shi sound is systolic pressure, and the end point of Ke Shi sound is diastolic pressure, and the said systolic pressure and the diastolic pressure that will obtain then are sent to man-machine interaction unit; Signal processing unit is used for carrying out filtering and processing and amplifying from the pulse wave signal of baroceptor and air pressure signal and from the Ke Shi tone signal of pick up.
Good effect of the present invention: electronic auscultation sphygmomanometer of the present invention has guaranteed the stability and the accuracy of measurement result through Ke Shi sound method is combined with oscillographic method, and this electric sphygmomanometer cost is low, simple to operate, capacity of resisting disturbance is strong, is beneficial to practicability.
Description of drawings
Fig. 1 is the structural representation of electronic auscultation sphygmomanometer of the present invention; Fig. 2 is the oscillogram of undressed Ke Shi tone signal; Fig. 3 is the oscillogram through filtered Ke Shi tone signal; Fig. 4 is the oscillogram through the Ke Shi tone signal after the correlation operation; Fig. 5 is the man-machine interaction unit 6 final comprehensive oscillograms that show; Fig. 6 is the structural representation that comprises the electronic auscultation sphygmomanometer of air pump, electronic valve and choke valve.
The specific embodiment
The specific embodiment one: the electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method of this embodiment; It is made up of cuff 1, pick up 2, baroceptor 3, signal processing unit 4, inflation/deflation unit 5, man-machine interaction unit 6 and microprocessor 7; Said cuff 1 internal airbag; Said air bag is communicated with inflation/deflation unit 5 through airway; It is characterized in that air bag also is connected with baroceptor 3 through airway; The air pressure electrical signal of baroceptor 3 connects the air pressure signal input of signal processing unit 4; The Ke Shi tone signal outfan of pick up 2 connects the Ke Shi tone signal input of signal processing unit 4, and the signal output part of signal processing unit 4 connects the signal input part of microprocessor 7, and the ventilating control signal output part of microprocessor 7 connects the ventilating control signal input part of inflation/deflation unit 5; The venting control signal output ends of microprocessor 7 connects the venting control signal input of inflation/deflation unit 5, and the data communication end of man-machine interaction unit 6 connects the data communication end of microprocessor 7.Referring to Fig. 1.
Built-in sound transducer in the said pick up 2, and said sound transducer is mike or piezoelectric ceramics.
Referring to Fig. 6, the inflation/deflation unit 5 in this embodiment is made up of air pump 51, electromagnetic valve 52 and choke valve 53; The ventilating control signal input part of said air pump 51 connects the ventilating control signal output part of microprocessor 7, and the gas outlet of air pump 51 is connected the air inlet emptying of air pump 51 through airway with the air bag of cuff 1; The venting control signal input of said electromagnetic valve 52 connects the venting control signal output ends of microprocessor; One end of said electromagnetic valve 52 is communicated with the other end emptying of electromagnetic valve 52 through airway with the air bag of cuff 1; One end of said choke valve 53 is communicated with the other end emptying of choke valve 53 through airway with the air bag of cuff 1.
Said air pump 51 is used for when the inflation signal that receives from microprocessor 7, beginning the air bag of cuff 1 is inflated, and when the end inflation signal that receives from little processing 7, stops inflation; Said choke valve 53 is used for after inflation finishes, the air bag of cuff 1 slowly being exitted; Said electromagnetic valve 52 is used for when the quick venting signal that receives from microprocessor 7, the air bag of cuff 1 being exitted fast.
The function of described inflation/deflation unit 5 is that cuff 1 is inflated and exitted, and under the situation of considering to reduce cost, said inflation/deflation unit 5 also can adopt general ball, inflates by hand or exits.
Said cuff 1 can be customized to one with pick up 2, and promptly pick up 2 links to each other with cuff 1, and pick up 2 is positioned at the place, lower edge of cuff 1, and at this moment, cuff 1 and pick up 2 are worn on person's arm to be measured as a whole; Cuff 1 also can separately be worn with pick up 2.
When using this embodiment and carrying out blood pressure measurement, said cuff 1 need be worn the upper arm person to be measured; Said pick up 2 need be placed in the arterial vascular top of person's upper arm to be measured, and the sound transducer in the pick up 2 is used for substituting people's ear of traditional Ke Shi sound method, obtains the Ke Shi tone signal of person's to be measured upper arm artery generation; Said baroceptor 3 is used for substituting the mercury column manometer or the pointer piezometer of traditional Ke Shi sound method, comes air pressure signal and person's to be measured pulse wave signal in the air bag of perception cuff 1; Said inflation/deflation unit 5 is used for substituting the ball of traditional Ke Shi sound method, under the control of microprocessor 7, realizes automatic inflation or automatic deflation to the air bag of cuff 1; Said man-machine interaction unit 6 is used for the input of operational order and the demonstration of measurement result;
In addition, said microprocessor 7 is used to receive the startup measuring-signal from man-machine interaction unit 6, and after receiving said startup measuring-signal, output inflation signal is given inflation/deflation unit 5; Behind its output inflation signal; The pulse wave signal and the air pressure signal of 4 outputs of continuous collecting signal processing unit; According to oscillographic method said pulse wave signal and air pressure signal are calculated then, obtain preliminary systolic pressure after, calculate maximum inflation pressure according to preliminary systolic pressure; And when said air pressure signal reached said maximum inflation pressure, end of output inflation signal was given inflation/deflation unit 5; After signal was inflated in the said end of output, pulse wave signal, air pressure signal and the Ke Shi tone signal of 4 outputs of continuous collecting signal processing unit stopped to gather when said air pressure signal is lower than 50mmHg, and exported the signal of exitting fast and give inflation/deflation unit 5; Then according to said pulse wave signal and air pressure signal; Utilize oscillographic method to obtain the scope of systolic pressure and the scope of diastolic pressure, in the scope of the scope of said systolic pressure and diastolic pressure, the passing threshold method is searched the Ke Shi tone signal again; Obtain the appearance point and the end point of Ke Shi sound; The appearance point of said Ke Shi sound is systolic pressure, and the end point of Ke Shi sound is diastolic pressure, and the said systolic pressure and the diastolic pressure that will obtain then are sent to man-machine interaction unit 6;
Said signal processing unit 4 is used for carrying out filtering and processing and amplifying from the pulse wave signal of baroceptor 3 and air pressure signal and from the Ke Shi tone signal of pick up 2.
Described passing threshold method is searched the Ke Shi tone signal, and the appearance point of acquisition Ke Shi sound and the detailed process of end point are following:
At first obtain the meansigma methods of all Ke Shi tone signal; Obtain threshold value after more said meansigma methods being multiply by filter factor; All are all deleted (promptly think less than said threshold value be noise signal) less than the Ke Shi tone signal of this threshold value; Reservation is greater than the Ke Shi tone signal of this threshold value (promptly think greater than said threshold value be the Ke Shi tone signal); In chronological sequence order is searched for the Ke Shi tone signal that keeps, and first Ke Shi point of articulation is the appearance point of Ke Shi sound, and last Ke Shi point of articulation is the end point of Ke Shi sound.Said filter factor is in interval [0.1,0.3] interior value, and the effect in [0.2,0.3] is better.
The said detailed process of the scope of scope that oscillographic method obtains systolic pressure and diastolic pressure of utilizing is:
Utilize oscillographic method at first to obtain systolic pressure P1 and diastolic pressure P2, then the systolic pressure that obtains is added and subtracted 15 millimetress of mercury respectively with diastolic pressure after, the scope of acquisition systolic pressure and the scope of diastolic pressure.Be said systolic pressure scope for (P1-15mmHg, P1+15mmHg), the scope of said diastolic pressure be (P2-15mmHg, P2+15mmHg).
Saidly said pulse wave signal and air pressure signal are calculated according to oscillographic method, obtain preliminary systolic pressure after, the detailed process that calculates maximum inflation pressure according to preliminary systolic pressure is:
According to pulse wave signal that receives and air pressure signal; Obtain the crest of pulse wave signal and the envelope of trough; And then obtain the variation relation of the amplitude of pulse wave signal with air pressure, the amplitude of said pulse wave signal with the rising of air pressure appear first increase, after the variation that reduces; According to the amplitude of said pulse wave signal variation relation with air pressure, obtain preliminary systolic pressure, and then obtain maximum inflation pressure, said maximum inflation pressure is the pressure that is higher than systolic pressure 30 millimetress of mercury.
Thus, this embodiment provides an intelligence inflation mechanism, and promptly the sphygomanometer of this embodiment can come the maximum inflation pressure of cuff is adjusted automatically according to measured's actual blood pressure situation.
The operation principle of this embodiment is: the operator starts or finishes blood pressure through man-machine interaction unit 6 and measures automatically; Microprocessor 7 control inflation/deflation unit 5 are inflated the air bag of cuff 1 and are exitted through airway; Cuff 1 and baroceptor 3 are communicated with through airway, and in inflation and the deflation course, baroceptor 3 changes into the air pressure signal of telecommunication with air pressure signal and is transferred to signal processing unit 4, is sampled by microprocessor 7 through the signal after signal processing unit 4 processing; Sound transducer in the pick up 2 is transferred to signal processing unit 4 after the Ke Shi tone signal is changed into the Ke Shi sound signal of telecommunication, and the signal after handling through signal processing unit 4 is sampled by microprocessor 7; 7 pairs of signals that sample of microprocessor carry out drawing pressure value after the computing; Measurement result is shown by microprocessor control human-computer interaction interface.
Wherein, After 7 pairs of signals that sample of microprocessor carry out computing, drawing in the process of pressure value, at first is to utilize oscillographic method to measure pressure value roughly, obtains the interval range of systolic pressure and diastolic pressure; And then in this interval range; The passing threshold method is searched the Ke Shi tone signal, finds the appearance point and the end point of Ke Shi sound, and its corresponding atmospheric pressure value is systolic pressure and diastolic pressure.If measure normally, the appearance point of Ke Shi sound and end point should be positioned at the middle part of interval range, and pressure value is credible shown in this moment; If the appearance point of Ke Shi sound or end point are near the edge of interval range; Show that then pressure value is very not credible shown in this moment; Can be through adjusting Ke Shi sound filter factor automatically; And to the search again after the filtering once more of Ke Shi tone signal, if still at interval edge, then can be through the credibility difference or the measurement mistake of program error judgment mechanism prompting user measurement result.
Man-machine interaction unit 6 adopts the waveform of dot matrix lcd, roller dynamic display pulse ripple signal and Ke Shi tone signal.In the measuring process, measured's body kinematics possibly cause blood pressure measurement inaccurate, and the motion of arm will cause the waveform distortion, even mixed and disorderly.This waveform Presentation Function is intended to point out the measured to keep correct measurement posture; Thereby improve the success rate of blood pressure measurement; On the other hand, experienced user can oneself be judged pressure value through observing the waveform that is shown in the measuring process with corresponding air pressure numerical value.
The electronic auscultation sphygmomanometer of this embodiment owing to adopted microprocessor, can be realized multiple advanced person's digital signal processing method and fault tolerant mechanism, has improved the capacity of resisting disturbance and the indicating value credibility of sphygomanometer effectively.In addition, the electronic auscultation sphygmomanometer of this embodiment is compared with existing general electric sphygmomanometer, has only increased cheap pick up, can make that but performance is greatly enhanced.
The present invention adopts oscillographic method with the mode that Ke Shi sound method combines blood pressure to be measured, and with both mutual supplement with each other's advantages, can guarantee the stability and the accuracy of measurement result simultaneously.There is error in the pressure value that oscillographic method measures; But measurement result is relatively stable; And Ke Shi sound rule is opposite, and noise possibly cause the measurement of Ke Shi sound method to make mistakes, but since Ke Shi sound method only the appearance through judging sound disappear and obtain systolic pressure and diastolic pressure; Do not make mistakes if measure, then measured value is accurately.Extensively being familiar with and the method for approval because Ke Shi sound method is the doctor, also is the goldstandard of clinical disease diagnosis, and the result who records with Ke Shi sound method can be used as the standard of clinical disease diagnosis.In addition; The whole Measuring Time of this embodiment is short, utilizes oscillographic method in the airbag aeration process, to implement the blood pressure preliminary surveying in the step 2, thereby can realize the different maximum inflation pressure of adjustment automatically to different people; Then pass through Ke Shi sound method real-time judge diastolic pressure appearance point in the deflation course; In case find the i.e. venting fast of diastolic pressure, dash venting through above-mentioned intelligence and effectively shortened Measuring Time, reduce the user misery.
In this embodiment, built-in A/D modular converter, digital filtering and rectification module, related operation module and characteristic point sampling module in the microprocessor 7;
Said A/D modular converter, being used for all analog signal conversion from signal processing unit 4 is digital signal; Wherein, said all analogue signals comprise pulse wave signal, air pressure signal and the Ke Shi tone signal of signal processing unit 4 outputs;
Said digital filtering and rectification module are used for the digital signal of A/D modular converter output is carried out digital filtering and rectification processing;
Said related operation module is used for Ke Shi tone signal and pulse wave signal after filtering and the rectification processing are carried out correlation operation;
Said characteristic point sampling module; Be used for the Ke Shi tone signal after the correlation operation is divided into W section by the time; Wherein the duration of each section equates; In each section, obtain the maximum of Ke Shi tone signal, and utilize the maximum of Ke Shi tone signal in each section to preserve, preserve the pairing atmospheric pressure value of maximum of Ke Shi tone signal in each section simultaneously as the representative value of this section; Wherein, W is a positive integer, and the size of W is by the duration decision of each section.
The duration of said each section is adjusted according to pulse wave signal, and the duration of said each section is less than or equal to the pulse cycle of pulse wave signal, in order to avoid lose effective information.
In measuring process, environment noise, cuff sliding wiping noise and pneumatic noise can cause very big interference to the Ke Shi tone signal, and the similar impact signal of Ke Shi tone signal, and general filtering method is difficult to make the Ke Shi tone signal from primary signal, to be separated.But because Ke Shi tone signal and pulse wave signal have close dependency; Be that not only go up strict relevant by the cycle with pulse wave signal for the Ke Shi tone signal; And the Ke Shi sound always appears near the pulse wave peak value; Through pulse wave signal and Ke Shi tone signal are carried out correlation operation, not only can effectively suppress pulse beat between noise signal in the district, and the noise signal after occurring with diastolic pressure before can effectively suppressing systolic pressure and occurring.This embodiment can be eliminated most of environment noise through the method for bandpass filtering, rectification, related operation, obtains more purified Ke Shi tone signal.Referring to Fig. 2 to Fig. 4, wherein Fig. 2 is the oscillogram of undressed Ke Shi tone signal, and Fig. 3 is the oscillogram through filtered Ke Shi tone signal, and Fig. 4 is the oscillogram through the Ke Shi tone signal after the correlation operation.Among Fig. 5, A is the peak value of pulse wave signal and the envelope of valley, and B is the air bag air pressure signal of cuff 1, and C is filtered Ke Shi tone signal, and E is the scope of the definite diastolic pressure of oscillographic method, and F is the scope of the definite systolic pressure of oscillographic method.
Claims (6)
1. the electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method; It is made up of cuff (1), pick up (2), baroceptor (3), signal processing unit (4), inflation/deflation unit (5), man-machine interaction unit (6) and microprocessor (7); Said cuff (1) internal airbag; Said air bag is communicated with inflation/deflation unit (5) through airway; Air bag also is connected with baroceptor (3) through airway; The air pressure electrical signal of baroceptor (3) connects the air pressure signal input of signal processing unit (4); The Ke Shi tone signal outfan of pick up (2) connects the Ke Shi tone signal input of signal processing unit (4), and the signal output part of signal processing unit (4) connects the signal input part of microprocessor (7), and the ventilating control signal output part of microprocessor (7) connects the ventilating control signal input part of inflation/deflation unit (5); The venting control signal output ends of microprocessor (7) connects the venting control signal input of inflation/deflation unit (5), and the data communication end of man-machine interaction unit (6) connects the data communication end of microprocessor (7); It is characterized in that: microprocessor (7), be used for receiving startup measuring-signal, and after receiving said startup measuring-signal, output inflation signal is given inflation/deflation unit (5) from man-machine interaction unit (6); Behind its output inflation signal; The pulse wave signal and the air pressure signal of continuous collecting signal processing unit (4) output; According to oscillographic method said pulse wave signal and air pressure signal are calculated then, obtain preliminary systolic pressure after, calculate maximum inflation pressure according to preliminary systolic pressure; And when said air pressure signal reached said maximum inflation pressure, end of output inflation signal was given inflation/deflation unit (5); Behind the said end inflation of output signal; Pulse wave signal, air pressure signal and the Ke Shi tone signal of continuous collecting signal processing unit (4) output; When said air pressure signal is lower than 50mmHg, stop to gather, and output is exitted signal fast to inflation/deflation unit (5); Then according to said pulse wave signal and air pressure signal; Utilize oscillographic method to obtain the scope of systolic pressure and the scope of diastolic pressure, in the scope of the scope of said systolic pressure and diastolic pressure, the passing threshold method is searched the Ke Shi tone signal again; Obtain the appearance point and the end point of Ke Shi sound; The appearance point of said Ke Shi sound is systolic pressure, and the end point of Ke Shi sound is diastolic pressure, and said systolic pressure that will obtain then and diastolic pressure are sent to man-machine interaction unit (6); Signal processing unit (4) is used for carrying out filtering and processing and amplifying from the pulse wave signal of baroceptor (3) and air pressure signal and from the Ke Shi tone signal of pick up (2).
2. the electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method according to claim 1; It is characterized in that described passing threshold method searches the Ke Shi tone signal; The detailed process of appearance point and end point that obtains the Ke Shi sound is following: at first obtain the meansigma methods of all Ke Shi tone signal, obtain threshold value after more said meansigma methods being multiply by filter factor, all are all deleted less than the Ke Shi tone signal of this threshold value; Reservation is greater than the Ke Shi tone signal of this threshold value; In chronological sequence order is searched for the Ke Shi tone signal that keeps, and first Ke Shi point of articulation is the appearance point of Ke Shi sound, and last Ke Shi point of articulation is the end point of Ke Shi sound.
3. the electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method according to claim 1; It is characterized in that the said detailed process of the scope of scope that oscillographic method obtains systolic pressure and diastolic pressure of utilizing is: utilize oscillographic method at first to obtain systolic pressure P1 and diastolic pressure P2; After then the systolic pressure that obtains being added and subtracted 15 millimetress of mercury respectively with diastolic pressure, the scope of acquisition systolic pressure and the scope of diastolic pressure.
4. the electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method according to claim 1; It is characterized in that saidly said pulse wave signal and air pressure signal being calculated according to oscillographic method; After obtaining preliminary systolic pressure; The detailed process that calculates maximum inflation pressure according to preliminary systolic pressure is: according to pulse wave signal that receives and air pressure signal; Obtain the crest and the envelope of trough of pulse wave signal, and then the amplitude of acquisition pulse wave signal is with the variation relation of air pressure, the amplitude of said pulse wave signal with the rising of air pressure appear first increase, after the variation that reduces; According to the amplitude of said pulse wave signal variation relation with air pressure, obtain preliminary systolic pressure, and then obtain maximum inflation pressure, said maximum inflation pressure is the pressure that is higher than systolic pressure 30 millimetress of mercury.
5. the electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method according to claim 1 is characterized in that built-in A/D modular converter, digital filtering and rectification module, related operation module and characteristic point sampling module in the microprocessor (7);
Said A/D modular converter, being used for all analog signal conversion from signal processing unit (4) is digital signal;
Said digital filtering and rectification module are used for the digital signal of A/D modular converter output is carried out digital filtering and rectification processing;
Said related operation module is used for Ke Shi tone signal and pulse wave signal after filtering and the rectification processing are carried out correlation operation;
Said characteristic point sampling module; Be used for the Ke Shi tone signal after the correlation operation is divided into W section by the time; Wherein the duration of each section equates; In each section, obtain the maximum of Ke Shi tone signal, and utilize the maximum of Ke Shi tone signal in each section to preserve, preserve the pairing atmospheric pressure value of maximum of Ke Shi tone signal in each section simultaneously as the representative value of this section; Wherein, W is a positive integer, and the size of W is by the duration decision of each section.
6. the electronic auscultation sphygmomanometer that combines based on Ke Shi sound method and oscillographic method according to claim 5; The duration that it is characterized in that said each section is adjusted according to pulse wave signal, and the duration of said each section is less than or equal to the pulse cycle of pulse wave signal.
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| CN111513752B (en) * | 2020-04-01 | 2022-11-18 | 中国海洋大学 | Pulse diagnosis instrument based on pulse sound signals |
| CN111990982B (en) * | 2020-08-31 | 2024-03-26 | 中国计量科学研究院 | Blood pressure acquisition device and processing system |
| CN112914531B (en) * | 2021-01-19 | 2022-09-30 | 深圳市杰纳瑞医疗仪器股份有限公司 | Method for determining blood pressure envelope wave, electronic device and storage medium |
| CN113080910A (en) * | 2021-03-31 | 2021-07-09 | 广东乐心医疗电子股份有限公司 | Blood pressure measuring device and sphygmomanometer |
| CN114176547B (en) * | 2021-12-22 | 2023-10-31 | 深圳市景新浩科技有限公司 | Automatic blood pressure measuring device |
| CN114587314A (en) * | 2022-02-28 | 2022-06-07 | 深圳市景新浩科技有限公司 | Internet blood pressure measuring device and control method thereof |
| CN116965788B (en) * | 2023-04-17 | 2023-12-29 | 辰浩医疗科技(广东)有限公司 | Intelligent sphygmomanometer based on oscillography and auscultation principles |
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| CN2927986Y (en) * | 2006-06-09 | 2007-08-01 | 北京麦邦光电仪器有限公司 | Double method blood pressure measurer for repeatedly observation |
| CN101554324B (en) * | 2008-04-07 | 2013-04-24 | 深圳迈瑞生物医疗电子股份有限公司 | Blood pressure measuring module |
| CN101548883A (en) * | 2009-05-26 | 2009-10-07 | 上海三埃弗电子有限公司 | Method for measuring blood pressure |
| CN201617821U (en) * | 2010-04-27 | 2010-11-03 | 哈尔滨工业大学 | Electronic auscultation sphygmomanometer based on combination of Korotkoff sound method and oscillometric method |
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