CN103371809A - Blood pressure value monitoring method and system - Google Patents
Blood pressure value monitoring method and system Download PDFInfo
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Abstract
The invention provides a blood pressure value monitoring method. The blood pressure value monitoring method aims at solving the problem that the existing blood pressure value monitoring is high in misjudgment rate. The blood pressure value monitoring method comprises processing CP (Cuff Pressure) signals and ECG (Electrocardiograph) signals which are collected through a human body sensor through a remote server to output derivative waveforms of pulse signals; processing the derivative waveforms of the pulse signals through the remote server to output a slope curve and a PTT curve; processing the slope curve and the PTT curve through the remote server to obtain a blood pressure value. The invention also provides a blood pressure value monitoring system. According to the technical scheme of the blood pressure value monitoring method and system, ambient interference to the blood pressure value monitoring is effectively eliminated, and the misjudgment rate is reduced.
Description
Technical field
The present invention relates to the measuring of human health field, relate to especially a kind of pressure value the method for monitoring and system.
Background technology
Blood pressure is the important physiological parameter of reflection cardiovascular system state.Particularly in recent years, the sickness rate of hypertension in mid-aged population constantly rise (having reached 15%～20% according to statistics), and usually be the key factor that causes the cardiovascular system some diseases, so the accurate detection of blood pressure becomes more and more important with warning in clinical and health service.
At present, the blood pressure measurement technology can be divided into two kinds of direct method and indirect methods clinically.Direct method is that the wound measuring method is arranged, and by conduit being inserted in people's blood vessel, obtains pressure value by pressure transducer, the pressure value that the method obtains accurately and reliably, but since complicated operation be not suitable for daily blood pressure and detect.And that indirect method possesses is non-invasive, simple to operate, so use increasingly extensive.The non-invasive blood pressure detection method of human blood-pressure mainly contains the auscultation that utilizes the Ke Shi sound and utilizes sleeve to press the oscillographic method of signal.
Ke Shi sound auscultation is by cuff being bundled in the appropriate location of experimenter's upper arm, press close to brachial artery with stethoscope, increase pressure until the blood flow of blocker arm with charge-discharge air bag to cuff, then charge-discharge air bag progressively reduces cuff pressure to recover the blood flow of arm, one of the artery blood flow of arm pulsation meeting generation is ascending in this process, the descending Ke Shi change of tune is changed again, can listen to the variation of Ke Shi sound to determine systolic pressure and diastolic pressure by stethoscope.The method needs experienced medical personnel to participate in, and by listening Ke Shi sound to differentiate systolic pressure, diastolic pressure, its reading is affected by user audition, easily introduces subjective error, is difficult to standardization.Electric sphygmomanometer so that the auscultation principle is made although realized automatic detection, does not thoroughly solve its inherent defect yet, namely large, the poor repeatability of error, be subject to noise jamming.
Oscillographic method detects the gas pressure wave of oscillation in the cuff by cuff interruption artery blood flow in deflation course, select wave of oscillation amplitude maximum point as a reference point, calculates systolic pressure and diastolic pressure according to the clinical statistics rule.Because the systolic pressure of oscillographic method and diastolic pressure are to try to achieve according to the clinical statistics rule, do not consider individual difference, therefore it is relatively poor that oscillographic method is measured when individual adaptability, and need the measured to keep posture accurate during with the oscillographic method Measure blood pressure, and unexpected action changes the measurement that meeting affect blood pressure.
Utilize auscultation or oscillographic method can obtain systolic pressure SP and the diastolic pressure DP of human body, whether these two pressure values and the distribution of adult's blood pressure are compared the pressure value that can differentiate human body normal, then reports to the police if abnormal conditions occur.But because the external interference that is subject in the measuring process can cause the inaccurate of pressure value, thereby higher False Rate appears.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of pressure value the method for monitoring, measures the problem that has higher False Rate in order to solve present pressure value.The present invention also provides a kind of system of pressure value monitoring.
For addressing the above problem, the invention provides a kind of pressure value the method for monitoring, comprise,
The sleeve that remote server is collected human body sensor presses signal CP and core signal ECG to process the derivative waveform of output pulse signal;
Remote server is processed the derivative waveform of described pulse signal, output voltage gradient curve and PTT PTT curve;
Remote server is processed slope curve and PTT curve, obtains described pressure value.
Further, above-mentioned method also comprises,
Remote server carries out Fuzzy Processing to the pressure value that detection obtains, and judges according to result whether pressure value is normal, if dysarteriotony is then reported to the police.
Above-mentioned method, wherein, the described sleeve that human body sensor is collected presses signal CP and core signal ECG to process, and the derivative waveform of output pulse signal is specially,
Use the Mexican-hat small echo that core signal ECG is carried out wavelet transformation, detect the R peak position of QRS ripple; Press some labelling consistent with R peak abscissa in the signal CP signal and with dashed lines to connect in sleeve, form a Trendline; Point on the CP signal and the point on the Trendline are subtracted each other at vertical coordinate, the pulse signal that is superimposed upon on the cuff pressure line is extracted; Seek between two peak-to-peak maximums of continuous R, as the crest of pulse signal at pulse signal; Pulse signals was differentiated about the time, obtained the derivative waveform of described pulse signal.
Above-mentioned method, wherein, described derivative waveform to described pulse signal is processed, and output voltage gradient curve and PTT curve are specially,
Just ask slope corresponding to the derivative waveform at the wave crest point place of pulse signal each time, the segment intervals linear of taking out this near zero-crossing point of derivative waveform corresponding to this wave crest point obtains slope corresponding to this wave crest point, the slope that this wave crest point is corresponding is as vertical coordinate, sleeve pressure value corresponding to this wave crest point forms a slope curve as the abscissa described point; Seek between two peak-to-peak maximums of continuous R at described derivative waveform, and definite described peaked abscissa, R peak abscissa value among derivative waveform medium wave peak abscissa value and the ECG is subtracted each other the PTT value that obtains as vertical coordinate, crest corresponding sleeve pressure value on CP signal Trendline is made the abscissa described point, form a PTT curve.
Above-mentioned method wherein, is describedly processed slope curve and PTT curve, and obtain described pressure value and be specially,
Find the point of slope value maximum at slope curve, the CP value that this point is corresponding is systolic pressure SP; Find the maximum point of PTT value at the PTT curve, the CP value that this point is corresponding is mean arterial pressure MAP; According to formula MAP=DP+1/3 * (SP-DP), obtain diastolic pressure DP.
Above-mentioned method, wherein, the described pressure value that detection is obtained carries out Fuzzy Processing, judges according to result whether pressure value is normal, if dysarteriotony, then reporting to the police is specially,
The trapezoidal membership function of shape carries out Fuzzy Processing to pressure value in the middle of adopting;
Behind pressure value process membership function A (x) and the B (x), obtain the fuzzy value A of diastolic pressure
DPFuzzy value B with systolic pressure
SP, definition alarm index AI=min{A
DP, B
SP, if then report to the police in AI＜0.5; Otherwise, then do not report to the police.
The membership function of diastolic pressure and systolic pressure is as follows respectively:
The present invention also provides a kind of system of pressure value monitoring, comprises,
Human body sensor, the sleeve pressure signal and the electrocardiosignal that are used for collecting human body;
Aggregation node is used for regularly notifier's body sensor and collects sleeve pressure signal and electrocardiosignal, and these two kinds of signals are sent to remote server;
Remote server, the electrocardiosignal and the sleeve that are used for reception is obtained press signal to process, and obtain systolic pressure SP and the diastolic pressure DP of human body.
Above-mentioned system, wherein, described remote server comprises,
The signal extraction module, the sleeve that is used for that human body sensor is collected presses signal CP and core signal ECG to process the derivative waveform of output pulse signal;
Signal processing module is used for the derivative waveform of described pulse signal being processed output voltage gradient curve and PTT curve;
Blood pressure calculates and output module, is used for slope curve and PTT curve are processed, and obtains described pressure value, i.e. systolic pressure SP and diastolic pressure DP.
Further, described remote server also comprises,
Alarm module, the pressure value that is used for detection is obtained carries out Fuzzy Processing, judges according to result whether pressure value is normal, if dysarteriotony is then reported to the police.
Above-mentioned system, wherein,
The signal extraction module specifically is used for, and uses the Mexican-hat small echo that core signal ECG is carried out wavelet transformation, detects the R peak position of QRS ripple; Press some labelling consistent with R peak abscissa in the signal CP signal and with dashed lines to connect in sleeve, form a Trendline; Point on the CP signal and the point on the Trendline are subtracted each other at vertical coordinate, the pulse signal that is superimposed upon on the cuff pressure line is extracted; Seek between two peak-to-peak maximums of continuous R, as the crest of pulse signal at pulse signal; Pulse signals was differentiated about the time, obtained the derivative waveform of described pulse signal;
Signal processing module just specifically is used for asking slope corresponding to the derivative waveform at the wave crest point place of pulse signal each time, the segment intervals linear of taking out this near zero-crossing point of derivative waveform corresponding to this wave crest point obtains slope corresponding to this wave crest point, the slope that this wave crest point is corresponding is as vertical coordinate, sleeve pressure value corresponding to this wave crest point forms a slope curve as the abscissa described point; Seek between two peak-to-peak maximums of continuous R at described derivative waveform, and definite described peaked abscissa, R peak abscissa value among derivative waveform medium wave peak abscissa value and the ECG is subtracted each other the PTT value that obtains as vertical coordinate, crest corresponding sleeve pressure value on CP signal Trendline is made the abscissa described point, form a PTT curve;
Blood pressure calculates and the concrete point that is used for finding at slope curve the slope value maximum of output module, and the CP value that this point is corresponding is systolic pressure SP; Find the maximum point of PTT value at the PTT curve, the CP value that this point is corresponding is mean arterial pressure MAP; According to formula MAP=DP+1/3 * (SP-DP), obtain diastolic pressure DP;
The trapezoidal membership function of shape carried out Fuzzy Processing to pressure value in the middle of alarm module specifically was used for adopting, and behind pressure value process membership function A (x) and the B (x), obtained the fuzzy value A of diastolic pressure
DPFuzzy value B with systolic pressure
SP, definition alarm index AI=min{A
DP, B
SP, if then report to the police in AI＜0.5; Otherwise, then do not report to the police;
The membership function of diastolic pressure and systolic pressure is as follows respectively:
Adopt technical scheme provided by the invention, shortcoming for existing blood pressure detection method proposes a kind of method of utilizing electrocardiosignal and sleeve to press the calculated signals pressure value, and designed a kind of alarm mechanism of pressure value based on this scheme, effectively eliminate the interference that outer bound pair pressure value is measured, reduce False Rate.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of a part of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the first embodiment of the invention flow chart;
Fig. 2 is the second embodiment of the invention structure chart;
Fig. 3 is the membership function figure of diastolic pressure and systolic pressure.
The specific embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, be the first embodiment of the invention flow chart, a kind of pressure value the method for monitoring is provided, specifically comprise,
Step S101 presses signal CP and core signal ECG to process the derivative waveform of output pulse signal to the sleeve that human body sensor is collected;
As an embodiment, specifically comprise, use the Mexican-hat small echo that electrocardiosignal is carried out wavelet transformation, detect the R peak position of QRS ripple; Point consistent with R peak abscissa in the CP signal is marked, and the with dashed lines connection, a Trendline formed; Point on the CP signal and the point on the Trendline are subtracted each other at vertical coordinate, thereby the pulse signal that will be superimposed upon on the cuff pressure line extracts; Seek between two peak-to-peak maximums of continuous R at pulse signal, this point is marked, as the crest of pulse signal; Pulse signals was differentiated about the time, obtained its derivative waveform.
Step S102 processes the derivative waveform of described pulse signal, output voltage gradient curve and PTT (Pulse Transmit Time, PTT) curve;
As an embodiment, specifically comprise, just ask slope corresponding to the derivative waveform at the wave crest point place of pulse signal each time, because this point is peak point, the derivative waveform of its correspondence is zero crossing just, and a bit of interval (such as the 30ms) linearisation of taking out so this near zero-crossing point of derivative waveform obtains slope corresponding to this point, and the slope that this point is corresponding is as vertical coordinate, corresponding sleeve pressure value forms a slope curve as the abscissa described point; Seek between two peak-to-peak maximums of continuous R at the derivative waveform, and definite these peaked abscissas, R peak abscissa value among derivative waveform medium wave peak abscissa value and the ECG is subtracted each other the PTT value that obtains as vertical coordinate, crest corresponding sleeve pressure value on CP signal Trendline is made the abscissa described point, form a PTT curve.
Step S103 processes slope curve and PTT curve, obtains described pressure value, i.e. systolic pressure SP, diastolic pressure DP;
As an embodiment, comprise that specifically find the point of slope value maximum at slope curve, the CP value of its correspondence is systolic pressure SP, find the maximum point of PTT value at the PTT curve, the CP value of its correspondence is mean arterial pressure MAP; According to formula MAP=DP+1/3 * (SP-DP), can obtain diastolic pressure DP.
Step S104, the pressure value that detection is obtained carries out Fuzzy Processing, judges according to result whether pressure value is normal, if dysarteriotony is then reported to the police.
This step is as an optional step, so that have warning function behind output systolic pressure SP and the diastolic pressure DP.As an embodiment, specifically comprise,
The trapezoidal membership function of shape carries out Fuzzy Processing to pressure value in the middle of adopting, and the membership function of diastolic pressure and systolic pressure is as follows respectively:
The distribution situation of the selective basis adult blood pressure of membership function:
(1) diastolic pressure＞95, systolic pressure＞160 then are hypertension;
(2) 90＜diastolic pressures＜95, systolic pressure＞160, then blood pressure is for higher;
(3) diastolic pressure＞95,130＜systolic pressure＜160, then blood pressure is higher;
(4) 60＜diastolic pressures＜90,90＜systolic pressure＜130, then blood pressure is normal;
(5) 50＜diastolic pressures＜60, systolic pressure＜85, then blood pressure is on the low side;
(6) diastolic pressure＜50,85＜systolic pressure＜90, then blood pressure is for lower;
(7) diastolic pressure＜50, systolic pressure＜85, then blood pressure is hypotension.
As shown in Figure 3, be the membership function figure of diastolic pressure and systolic pressure, when the fuzzy value of blood pressure near 1 or when equaling 1, pressure value is normal, when the blood pressure fuzzy value near 0 or when equaling 0, pressure value is unusual, needs to report to the police.So according to the normal distribution situation of adult's pressure value, 0.5 can be used as the normal and unusual separation of differentiation, as long as the fuzzy value of diastolic pressure or systolic pressure is lower than 0.5, the pressure value of human body is abnormal.
Behind pressure value process membership function A (x) and the B (x), obtain the fuzzy value A of diastolic pressure
DPFuzzy value B with systolic pressure
SP, definition alarm index AI=min{A
DP, B
SP, if then report to the police in AI＜0.5; Otherwise, then do not report to the police.
As shown in Figure 2, be the second embodiment of the invention structure chart, a kind of system of pressure value monitoring is provided, specifically comprise,
Particularly, remote server comprises,
Specifically be used for, use the Mexican-hat small echo that electrocardiosignal is carried out wavelet transformation, detect the R peak position of QRS ripple; Point consistent with R peak abscissa in the CP signal is marked, and the with dashed lines connection, a Trendline formed; Point on the CP signal and the point on the Trendline are subtracted each other at vertical coordinate, thereby the pulse signal that will be superimposed upon on the cuff pressure line extracts; Seek between two peak-to-peak maximums of continuous R at pulse signal, this point is marked, as the crest of pulse signal; Pulse signals was differentiated about the time, obtained its derivative waveform.
Concrete just be used for asked slope corresponding to the derivative waveform at the wave crest point place of pulse signal each time, because this point is peak point, the derivative waveform of its correspondence is zero crossing just, a bit of interval (such as the 30ms) linearisation of taking out so this near zero-crossing point of derivative waveform obtains slope corresponding to this point, the slope that this point is corresponding is as vertical coordinate, corresponding sleeve pressure value forms a slope curve as the abscissa described point; And seek between two peak-to-peak maximums of continuous R at the derivative waveform, and definite these peaked abscissas, R peak abscissa value among derivative waveform medium wave peak abscissa value and the ECG is subtracted each other the PTT value that obtains as vertical coordinate, crest corresponding sleeve pressure value on CP signal Trendline is made the abscissa described point, form a PTT curve.
Blood pressure calculates and output module 2033, is used for slope curve and PTT curve are processed, and obtains described pressure value, i.e. systolic pressure SP, diastolic pressure DP and mean arterial pressure MAP;
The concrete point that is used for finding at slope curve the slope value maximum, the CP value of its correspondence is systolic pressure SP, finds the maximum point of PTT value at the PTT curve, and the CP value of its correspondence is mean arterial pressure MAP; And according to formula MAP=DP+1/3 * (SP-DP), can obtain diastolic pressure DP.
Preferably, this remote server can also comprise,
The concrete trapezoidal membership function of the middle shape of employing that is used for carries out Fuzzy Processing to pressure value, behind pressure value process membership function A (x) and the B (x), obtains the fuzzy value A of diastolic pressure
DPFuzzy value B with systolic pressure
SP, definition alarm index AI=min{A
DP, B
SP, if then report to the police in AI＜0.5; Otherwise, then do not report to the police.
The membership function of diastolic pressure and systolic pressure is as follows respectively:
The distribution situation of the selective basis adult blood pressure of membership function:
(1) diastolic pressure＞95, systolic pressure＞160 then are hypertension;
(2) 90＜diastolic pressures＜95, systolic pressure＞160, then blood pressure is for higher;
(3) diastolic pressure＞95,130＜systolic pressure＜160, then blood pressure is higher;
(4) 60＜diastolic pressures＜90,90＜systolic pressure＜130, then blood pressure is normal;
(5) 50＜diastolic pressures＜60, systolic pressure＜85, then blood pressure is on the low side;
(6) diastolic pressure＜50,85＜systolic pressure＜90, then blood pressure is for lower;
(7) diastolic pressure＜50, systolic pressure＜85, then blood pressure is hypotension.
When the fuzzy value of blood pressure near 1 or when equaling 1, pressure value is normal, when the blood pressure fuzzy value near 0 or when equaling 0, pressure value is unusual, needs to report to the police.So according to the normal distribution situation of adult's pressure value, 0.5 can be used as the normal and unusual separation of differentiation, as long as the fuzzy value of diastolic pressure or systolic pressure is lower than 0.5, the pressure value of human body is abnormal.
Above-mentioned explanation illustrates and has described the preferred embodiments of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection domain of claims of the present invention.
Claims (10)
1. a pressure value the method for monitoring is characterized in that, comprise,
The sleeve that remote server is collected human body sensor presses signal CP and core signal ECG to process the derivative waveform of output pulse signal;
Remote server is processed the derivative waveform of described pulse signal, output voltage gradient curve and PTT PTT curve;
Remote server is processed slope curve and PTT curve, obtains described pressure value.
2. method according to claim 1 is characterized in that, also comprise,
Remote server carries out Fuzzy Processing to the pressure value that detection obtains, and judges according to result whether pressure value is normal, if dysarteriotony is then reported to the police.
3. method according to claim 1 and 2 is characterized in that, the described sleeve that human body sensor is collected presses signal CP and core signal ECG to process, and the derivative waveform of output pulse signal is specially,
Use the Mexican-hat small echo that core signal ECG is carried out wavelet transformation, detect the R peak position of QRS ripple; Press some labelling consistent with R peak abscissa in the signal CP signal and with dashed lines to connect in sleeve, form a Trendline; Point on the CP signal and the point on the Trendline are subtracted each other at vertical coordinate, the pulse signal that is superimposed upon on the cuff pressure line is extracted; Seek between two peak-to-peak maximums of continuous R, as the crest of pulse signal at pulse signal; Pulse signals was differentiated about the time, obtained the derivative waveform of described pulse signal.
4. method according to claim 1 and 2 is characterized in that, described derivative waveform to described pulse signal is processed, and output voltage gradient curve and PTT curve are specially,
Just ask slope corresponding to the derivative waveform at the wave crest point place of pulse signal each time, the segment intervals linear of taking out this near zero-crossing point of derivative waveform corresponding to this wave crest point obtains slope corresponding to this wave crest point, the slope that this wave crest point is corresponding is as vertical coordinate, sleeve pressure value corresponding to this wave crest point forms a slope curve as the abscissa described point; Seek between two peak-to-peak maximums of continuous R at described derivative waveform, and definite described peaked abscissa, R peak abscissa value among derivative waveform medium wave peak abscissa value and the ECG is subtracted each other the PTT value that obtains as vertical coordinate, crest corresponding sleeve pressure value on CP signal Trendline is made the abscissa described point, form a PTT curve.
5. method according to claim 1 and 2 is characterized in that, described slope curve and PTT curve is processed, obtain described pressure value and be specially,
Find the point of slope value maximum at slope curve, the CP value that this point is corresponding is systolic pressure SP; Find the maximum point of PTT value at the PTT curve, the CP value that this point is corresponding is mean arterial pressure MAP; According to formula MAP=DP+1/3 * (SP-DP), obtain diastolic pressure DP.
6. method according to claim 2 is characterized in that, the described pressure value that detection is obtained carries out Fuzzy Processing, judges according to result whether pressure value is normal, if dysarteriotony, then reporting to the police is specially,
The trapezoidal membership function of shape carries out Fuzzy Processing to pressure value in the middle of adopting;
Behind pressure value process membership function A (x) and the B (x), obtain the fuzzy value A of diastolic pressure
DPFuzzy value B with systolic pressure
SP, definition alarm index AI=min{A
DP, B
SP, if then report to the police in AI＜0.5; Otherwise, then do not report to the police.
The membership function of diastolic pressure and systolic pressure is as follows respectively:
7. the system of a pressure value monitoring is characterized in that, comprise,
Human body sensor, the sleeve pressure signal and the electrocardiosignal that are used for collecting human body;
Aggregation node is used for regularly notifier's body sensor and collects sleeve pressure signal and electrocardiosignal, and these two kinds of signals are sent to remote server;
Remote server, the electrocardiosignal and the sleeve that are used for reception is obtained press signal to process, and obtain systolic pressure SP and the diastolic pressure DP of human body.
8. system according to claim 7 is characterized in that, described remote server comprises,
The signal extraction module, the sleeve that is used for that human body sensor is collected presses signal CP and core signal ECG to process the derivative waveform of output pulse signal;
Signal processing module is used for the derivative waveform of described pulse signal being processed output voltage gradient curve and PTT curve;
Blood pressure calculates and output module, is used for slope curve and PTT curve are processed, and obtains described pressure value, i.e. systolic pressure SP and diastolic pressure DP.
9. system according to claim 8 is characterized in that, described remote server also comprises,
Alarm module, the pressure value that is used for detection is obtained carries out Fuzzy Processing, judges according to result whether pressure value is normal, if dysarteriotony is then reported to the police.
10. system according to claim 9 is characterized in that,
The signal extraction module specifically is used for, and uses the Mexican-hat small echo that core signal ECG is carried out wavelet transformation, detects the R peak position of QRS ripple; Press some labelling consistent with R peak abscissa in the signal CP signal and with dashed lines to connect in sleeve, form a Trendline; Point on the CP signal and the point on the Trendline are subtracted each other at vertical coordinate, the pulse signal that is superimposed upon on the cuff pressure line is extracted; Seek between two peak-to-peak maximums of continuous R, as the crest of pulse signal at pulse signal; Pulse signals was differentiated about the time, obtained the derivative waveform of described pulse signal;
Signal processing module just specifically is used for asking slope corresponding to the derivative waveform at the wave crest point place of pulse signal each time, the segment intervals linear of taking out this near zero-crossing point of derivative waveform corresponding to this wave crest point obtains slope corresponding to this wave crest point, the slope that this wave crest point is corresponding is as vertical coordinate, sleeve pressure value corresponding to this wave crest point forms a slope curve as the abscissa described point; Seek between two peak-to-peak maximums of continuous R at described derivative waveform, and definite described peaked abscissa, R peak abscissa value among derivative waveform medium wave peak abscissa value and the ECG is subtracted each other the PTT value that obtains as vertical coordinate, crest corresponding sleeve pressure value on CP signal Trendline is made the abscissa described point, form a PTT curve;
Blood pressure calculates and the concrete point that is used for finding at slope curve the slope value maximum of output module, and the CP value that this point is corresponding is systolic pressure SP; Find the maximum point of PTT value at the PTT curve, the CP value that this point is corresponding is mean arterial pressure MAP; According to formula MAP=DP+1/3 * (SP-DP), obtain diastolic pressure DP;
The trapezoidal membership function of shape carried out Fuzzy Processing to pressure value in the middle of alarm module specifically was used for adopting, and behind pressure value process membership function A (x) and the B (x), obtained the fuzzy value A of diastolic pressure
DPFuzzy value B with systolic pressure
SP, definition alarm index AI=min{A
DP, B
SP, if then report to the police in AI＜0.5; Otherwise, then do not report to the police;
The membership function of diastolic pressure and systolic pressure is as follows respectively:
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| CN110393506B (en) * | 2019-07-24 | 2022-05-06 | 缤刻普达（北京）科技有限责任公司 | Blood pressure monitoring device and blood pressure data processing system |
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