CN102626308A - Blood pressure measurement method resistant to movement interference and system - Google Patents
Blood pressure measurement method resistant to movement interference and system Download PDFInfo
- Publication number
- CN102626308A CN102626308A CN2012101196320A CN201210119632A CN102626308A CN 102626308 A CN102626308 A CN 102626308A CN 2012101196320 A CN2012101196320 A CN 2012101196320A CN 201210119632 A CN201210119632 A CN 201210119632A CN 102626308 A CN102626308 A CN 102626308A
- Authority
- CN
- China
- Prior art keywords
- motion artifacts
- value
- pwm
- module
- motion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention relates to a blood pressure measurement method resistant to movement interference and a system. The method comprises the following steps of performing initializing setting on gas discharging parameters; collecting cuff pressure data; calculating average gas discharging speed and pulse-width modulation (PWM) increasing amount according to the collected pressure date; judging whether a movement mark position is in place; when the movement mark position is not in place, identifying movement interference, and setting a pressure value before movement interference; when the movement mark position is in place, processing the movement interference, and enabling a current pressure value to achieve the pressure value before the movement interference. Calculating a blood pressure value according to the current pressure value and a PWM value, and setting a gas discharging target pressure value according to the blood pressure value; and if the current pressure value is smaller than or equal to the gas discharging target pressure value, completely opening a gas valve to discharge gas, and finishing measurement. The blood pressure measurement method resistant to the movement interference can effectively reduce leakage caused by the movement interference and improves accuracy and effectiveness of blood pressure measurement under the condition of movement interference.
Description
Technical field
The present invention relates to a kind of blood pressure measuring method and system, relate in particular to a kind of blood pressure measuring method and system of anti-motion artifacts.
Background technology
Blood pressure is the life parameters that body weight for humans is wanted.At present, succusion is the automatic method of measuring of non-invasive blood pressure that generally adopts in the monitor.And succusion is claimed oscillographic method, measures blood pressure through the relation of setting up systolic pressure, mean pressure, diastolic pressure and cuff pressure pulse wave.Concrete operations are following, at first are bundled in cuff on the arm, and cuff is inflated to certain pressure, are higher than systolic pressure until pressure, begin venting then; In deflation course; Static pressure reduces gradually in the cuff, and pressure transducer can detect interior pressure and the fluctuation of institute's cuff of surveying in real time, when static pressure in the cuff during near systolic pressure; The pressure pulse wave wave amplitude increases; When equaling mean pressure, arterial wall is in the state of loading, and the pressure pulse wave amplitude reaches maximum; After pressure was less than diastolic pressure, arterial lumen was fully expanded, and this moment, the pressure pulse wave amplitude maintained reduced levels.Pressure curve according to the pressure pulse wave amplitude can calculate systolic pressure, mean pressure and diastolic pressure.
At present, the linear deflation mode is an industry venting mode comparatively commonly used; The linear deflation mode is to guarantee the speed venting with 2 mmHg/s-7mmHg/s through the valve openings size of controlling linear valve, and cuff pressure pulse wave in the detection deflation course and corresponding cuff thereof are pressed.The linear deflation mode can make the tester comparatively comfortable, but is interfered easily in measuring, thus the accuracy that influence is measured.In the blood pressure measurement process, the measured occurs through regular meeting and bend elbow, big motion and slight discontinuous little motion etc. such as rock.Use the blood pressure measurement of linear deflation mode, in measuring process, always with the linear deflation of fixed speed; If arm extruding cuff causes cuff gas leakage during motion, the cuff pressure drop is much lower; Make the pulse wave loss more; And the pulse wave transformation of data distortion before and after when motion and the motion, cause that effective pressure pulse wave data reduce, and have a strong impact on the accuracy and the effectiveness of blood pressure measurement.
Summary of the invention
The technical problem that the present invention solves is: the blood pressure measuring method and the system that make up a kind of anti-motion artifacts; Overcome in the prior art because of motion artifacts; The gas leakage of generation cuff reduces effective pressure pulse wave data, thereby brings high blood pressure down the accuracy of measurement and the technical problem of effectiveness.
Technical scheme of the present invention is: a kind of blood pressure measuring method of anti-motion artifacts; May further comprise the steps: the venting parameter initialization: the venting parameter is carried out the initialization setting; And open air valve and begin venting, venting parameter initialization setting comprises initial p WM value and kinestate flag bit is set; Gather the cuff pressure data: the cuff pressure data are gathered, and pressure data is carried out denoising and signal processing and amplifying; Calculate venting speed and PWM recruitment: the pressure data according to gathering calculates average venting speed and PWM recruitment; Judge the kinestate flag bit: judge whether the kinestate flag bit is on the throne; Motion artifacts identification: when judging that the motion flag bit is not on the throne, motion artifacts is discerned, when identifying motion artifacts, obtain preceding force value of motion artifacts and PWM value, and the motion flag bit is set on the throne; Motion artifacts is handled: when judging that the motion flag bit is on the throne, motion artifacts is handled, make the current pressure value reach the preceding force value of motion artifacts, and the motion flag bit is set to not on the throne; The venting target pressure value is provided with: according to current force value and PWM value pressure value is calculated, and the venting target pressure value is provided with according to this pressure value; Judge whether to reach the venting target pressure value: current force value and venting target pressure value are compared, judge whether the current pressure value reaches the venting target pressure value; If current force value during greater than the venting target pressure value, then is back to and gathers the cuff pressure data step; Air valve complete opening venting:, then the air valve complete opening is exitted if current force value is less than or equal to when exitting target pressure value.
Further technical scheme of the present invention is: said motion artifacts identification step comprises: according to the cuff pressure data of gathering, obtain the current pressure value, and the current pressure value is carried out record, simultaneously the pairing PWM value of current pressure value is carried out record; When the PWM value increases continuously; And when cumulative at short notice recruitment surpasses the PWM threshold value; Perhaps when the absolute value of the average venting speed that calculates during greater than certain number of times of the threshold value of preset real-time venting speed; Perhaps when current PWM value during greater than the certain number of times of threshold value of preset PWM value, then judgement identifies motion artifacts; When identifying motion artifacts, force value before the motion artifacts and PWM value are provided with, the kinestate flag bit is set on the throne.
Further technical scheme of the present invention is: said motion artifacts treatment step comprises: when there is motion artifacts in judgement; The motion artifacts time is carried out timing; And the time of judging motion artifacts whether reach the motion artifacts time threshold, judge simultaneously whether present force value reaches the force value before the motion artifacts; When a period of time internal pressure value stabilization is in a certain force value threshold range, judge that then motion artifacts finishes; When motion artifacts finishes, and during the force value when present force value is less than motion artifacts before, then judgement need be to the additional gas of cuff; When needs replenish gas, open air-pump inflating, make force value reach the preceding force value of motion artifacts, and the venting parameter is carried out the initialization setting again, the motion flag bit is set to not on the throne, and initial property venting again.
Further technical scheme of the present invention is: comprise that also PWM value is provided with step before said venting target pressure value is provided with: unidentified when going out motion artifacts when judging, the PWM value is set, wherein the PWM value be set to current PWM value and PWM recruitment and; When judging when need not replenish gas, perhaps after the parameter of will exitting reinitializes, the PWM value that the PWM value is set to reinitialize; Before obtaining motion artifacts after force value and the PWM value, perhaps when judge do not reach motion artifacts time threshold and motion artifacts before during force value, perhaps when judging that motion artifacts does not finish, PWM value is set to zero, and the pass gas check valve, stops to exit.
Technical scheme of the present invention is: make up a kind of blood pressure measuring system of anti-motion artifacts, comprise parameter presetting module, pressure data acquisition module, PWM recruitment computing module, kinestate flag bit on-site judgment module, motion artifacts identification module, motion artifacts processing module, pressure value computing module, venting target pressure value judge module and measure the end judge module; Said parameter presetting module is used for the venting parameter is carried out the initialization setting; Said pressure data acquisition module links to each other with said parameter presetting module, is used to gather pressure data; Said PWM recruitment computing module links to each other with said pressure data acquisition module, is used to calculate average venting speed and PWM recruitment; Said kinestate flag bit judge module links to each other with said PWM recruitment computing module, is used to judge whether the kinestate flag bit is on the throne; Said motion artifacts identification module links to each other with said kinestate flag bit judge module, is used for when judging that the motion flag bit is not on the throne, motion artifacts being discerned, and force value before the motion artifacts and PWM value being provided with; Said motion artifacts processing module links to each other with said kinestate flag bit judge module, is used for when judging that the motion flag bit is on the throne, motion artifacts being handled, and makes the current pressure value reach the preceding force value of motion artifacts; Said pressure value computing module links to each other with said motion artifacts identification module and motion artifacts processing module respectively, is used for pressure value is calculated, and according to the pressure value that calculates the venting target pressure value is provided with then; Said venting target pressure value judge module links to each other with said pressure value computing module, is used for current pressure value and venting target pressure value are compared, and judges whether the current pressure value reaches the venting target pressure value of setting; Said measurement finishes judge module, links to each other with said venting target pressure value judge module, is used for then the air valve complete opening being exitted if current force value is less than or equal to when exitting target pressure value.
Further technical scheme of the present invention is: said motion artifacts identification module comprises that force value and PWM value record unit, motion artifacts identification judging unit and force value and PWM value are provided with the unit; Said force value and PWM value record unit link to each other with said kinestate flag bit on-site judgment module, are used for current pressure value and PWM value are carried out record; Said motion artifacts identification judging unit links to each other with said force value and PWM value record unit, is used to judge whether to identify motion artifacts; Said force value and PWM value are provided with the unit and link to each other with said motion artifacts identification judging unit, are used for when judgement identifies motion artifacts, obtain preceding force value of motion artifacts and PWM value, and the motion flag bit is set on the throne.
Further technical scheme of the present invention is: said motion artifacts processing module comprises that time threshold and pressure threshold judging unit, motion end judging unit, make-up gas judging unit and initialization are provided with the unit; Said time threshold and pressure threshold judging unit link to each other with said kinestate flag bit on-site judgment module; Be used for the motion artifacts time is carried out timing; And the time of judging motion artifacts whether reach the motion artifacts time threshold, and judge whether present force value reaches the preceding force value of motion artifacts; Said motion finishes judging unit and links to each other with said time threshold and pressure threshold judging unit; Be used for when the time of judging motion artifacts reaches the motion artifacts time threshold and when judging the force value before present force value reaches motion artifacts, judge whether motion artifacts finishes; Said make-up gas judging unit finishes judging unit with said motion and links to each other, and is used for when judging that motion artifacts finishes, and judging whether need be to the cuff make-up gas; Said initialization is provided with the unit and links to each other with said make-up gas judging unit, be used for when judgement need be inflated cuff, opening air pump and inflating, and the venting parameter is carried out the initialization setting again, and the motion flag bit is set to not on the throne.
Further technical scheme of the present invention is: comprise that also the PWM value is provided with module, link to each other with said motion artifacts identification module and said motion artifacts processing module respectively, be used for according to motion artifacts the PWM value being provided with.
Technical scheme of the present invention is: make up a kind of blood pressure measuring system, comprise cuff gas path module, data acquisition module, control unit, central processing module and display module; Said cuff gas path module is used for cuff is charged and discharged gas; Said data acquisition module links to each other with said cuff gas path module, is used to gather the cuff pressure data, then the cuff pressure data is carried out filtering and amplification; Said control unit links to each other with institute cuff gas path module, is used to control inflator pump and cuff is inflated and controlled vent valve and exit; Said central processing module links to each other with said control unit and data acquisition unit respectively; Be used for pressure value being calculated, and the blood pressure measuring system of aforesaid a kind of anti-motion artifacts is arranged in the said central processing module according to the cuff pressure data that collect; Said display module links to each other with said central processing module, is used for the pressure value that calculates is shown.
Technique effect of the present invention is: the blood pressure measuring method and the system that make up a kind of anti-motion artifacts; Through motion artifacts is analyzed; The cuff that collects during according to motion artifacts is pressed and cuff is pressed the characteristics that change; After interferential identification of design movement and the identification motion artifacts inflator pump and vent valve are carried out the control corresponding processing; Can effectively reduce the gas leakage that causes because of motion artifacts, thereby effectively increase accuracy and the precision of gathering, improve the accuracy and the effectiveness of the blood pressure measurement under the motion artifacts situation simultaneously.
Description of drawings
Fig. 1 is the blood pressure measuring method flow chart of a kind of anti-motion artifacts of the present invention.
Fig. 2 is the blood pressure measuring system sketch map of a kind of anti-motion artifacts of the present invention.
Fig. 3 is the concrete sketch map of the blood pressure measuring system of a kind of anti-motion artifacts of the present invention.
The variation sketch map of cuff pressure when Fig. 4 normally measures blood pressure for the blood pressure measuring system of a kind of anti-motion artifacts of the present invention.
Another sketch map of variation of cuff pressure when Fig. 5 normally measures blood pressure for the blood pressure measuring system of a kind of anti-motion artifacts of the present invention.
The blood pressure measuring system of Fig. 6 a kind of anti-motion artifacts of the present invention motion artifacts appears in carrying out deflation course and the time force value curvilinear motion sketch map.
The blood pressure measuring system of Fig. 7 a kind of anti-motion artifacts of the present invention motion artifacts appears in carrying out deflation course and the time another sketch map of force value curvilinear motion.
The specific embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is further specified.
As shown in Figure 1, the specific embodiment of the present invention is: a kind of blood pressure measuring method of anti-motion artifacts is provided, comprises the steps:
Detailed process is: the venting parameter is carried out the initialization setting, and open air valve; Comprising initial PWM value, venting target pressure value, venting target speed value, kinestate flag bit and other each item threshold values (threshold value and the motion artifacts time threshold that comprise real-time venting speed) etc. are set.Wherein the present invention mainly carries out the initialization setting to the parameters of the blood pressure measuring method of linear deflation mode; And in the linear deflation process, the opening of air valve is the process that increases gradually along with the increase of time; Wherein the size of the valve openings of linear valve is controlled through regulating impulse adjusting width (being called for short PWM); The span of PWM value is 0 ~ 100; Promptly 0 ~ 100%; The size of PWM value is directly proportional with valve openings, comes the openings of sizes of by-pass valve control through the PWM value is set, thereby reaches linear deflation; So the size of the percentage ratio of air valve opening is the size of PWM value.
Detailed process is: through pressure transducer the cuff pressure data are gathered; Remove noise through low-pass filtering treatment; And the signal that will remove noise amplifies; Signal after will amplifying then is delivered to central processing module and handles, and the interval of wherein gathering cuff pressure is T, and then sample frequency is 1/T.And the cuff pressure data of gathering are current force value.
Detailed process is: based on the speed of can on average being exitted of the pressure differential in a period of time, unit is mmHg/s, this on average the speed of exitting will wherein be the current pressure value as the speed of real-time venting, be the force value before a period of time; Concrete formula is following:
When needs are regulated the PWM value, need to calculate earlier the PWM recruitment, unit is 1, span wherein is 0 ~ 100.
Poor according to current real-time venting speed and real-time venting speed before and target velocity (fixed value), then according to before the recruitment of PWM value, calculate the recruitment of this cycle P WM value; Wherein, Calculate the method for PWM recruitment; Be not limited to as above method; Can also calculate according to the characteristic mode of air valve, also can adopt open loop by-pass valve control opening and design the account form of PWM recruitment, promptly confirm the recruitment of PWM value according to reality venting speed and target velocity difference.
Detailed process is: said kinestate flag bit comprise the kinestate flag bit on the throne with two kinds not on the throne of kinestate flag bit; According to the kinestate flag bit that is provided with, judge whether the kinestate flag bit is on the throne; When judging that the kinestate flag bit is not on the throne, then need discern motion artifacts; When judging that the kinestate flag bit is on the throne, explain to have motion artifacts, then need handle motion artifacts.
Step 105, record current pressure value and PWM value;
Detailed process is: when judging that the kinestate flag bit is not on the throne, need discern motion artifacts; Then, obtain the current pressure value according to the cuff pressure data of gathering; The current pressure value is carried out record; Simultaneously the pairing current PWM value of current pressure value is carried out record, doing like this is in order to discern motion, and when identifying motion; And after the motion end, can make force value and corresponding PWM value thereof before force value and PWM value return to motion; Generally, can only write down force value and the PWM value of interior M period for the previous period.
Detailed process is: judge whether to identify motion artifacts and comprise following mode: when the PWM value increases continuously, and cumulative at short notice recruitment then can be judged and identify motion artifacts when surpassing the PWM threshold value; Perhaps, then can judge and identify motion artifacts when the absolute value of the real-time venting speed that calculates during greater than certain number of times of the threshold value of preset real-time venting speed; Perhaps, then can judge and identify motion artifacts when current PWM value during greater than the certain number of times of threshold value of preset PWM value.Wherein, motion artifacts be meant up and down or roll arm, bend the elbow motion and motion such as acutely rock; When motion artifacts takes place, can be expressed to cuff, cuff pressure is raise rapidly, cause gas leakage, influence linear deflation control and blood pressure measurement.The threshold value of the speed of wherein exitting in real time and the threshold value of PWM value can be confirmed according to the maximum intensity of detectable pulse wave signal; The identification of motion artifacts is in order to detect the sudden change of PWM value timely, thereby closes gas check valve, reduces gas leakage.
Detailed process is: the force value to M the period in a period of time of record in the step 105 is searched for; Find out the period that pressure is undergone mutation; If find this sudden change period; The force value of period of then should suddenling change is set to the force value before the motion artifacts, and the corresponding PWM value of this force value is set to the preceding PWM value of motion artifacts.If do not find the period of undergoing mutation, the force value of first period in M the period of then writing down is set to the force value before the motion artifacts, and then the corresponding PWM value of this force value is set to the preceding PWM value of motion artifacts; And the motion flag bit is set on the throne.
Detailed process is: when judging that kinestate is masked as when on the throne; Then judge and have motion artifacts; Promptly need handle motion artifacts; Need carry out timing this moment to the motion artifacts time, judges then whether the time of motion artifacts reaches the motion artifacts time threshold, need judge the force value before whether present force value reaches motion artifacts simultaneously.
Detailed process is: when the time of judging motion artifacts reached the motion artifacts time threshold, when judging the force value before present force value reaches motion artifacts simultaneously, then account for motion was disturbed and is still being carried out, and needed this moment to judge whether motion artifacts finishes; If a period of time internal pressure value stabilization in a certain force value threshold range, judges that then motion artifacts finishes.
Step 110 judges whether to need to replenish gas;
Detailed process is: when judging that motion artifacts has finished, then also need judge whether to inflate make-up gas to cuff; Whether judge whether that less than the force value before the motion artifacts needs replenish gas according to present force value, during force value before present force value is less than motion artifacts, then judgement need replenish gas to cuff; Otherwise judge and need not replenish gas.
Detailed process is: when judgement needs to replenish gas, then open air pump and inflate, make force value reach the preceding force value of motion artifacts; Reinitialize the venting parameter then, comprise PWM value and other parameters are carried out the initialization setting; The motion flag bit is set to not on the throne, and initial property venting again.
Detailed process is: unidentified when going out motion artifacts when judging, PWM value is set, wherein the PWM value be set to current PWM value and PWM recruitment and; When judging when need not replenish gas, perhaps after the parameter of will exitting reinitializes, the PWM value that the PWM value is set to reinitialize; Before obtaining motion artifacts after force value and the PWM value, perhaps when judge do not reach motion artifacts time threshold and motion artifacts before during force value, perhaps when judging that motion artifacts does not finish, PWM value is set to zero, and the pass gas check valve, stops to exit; With the PWM value be provided with finish after, waiting time T gets into next step then.
Detailed process is: according to the current pressure value of PWM value that is provided with and collection, pressure value is calculated; Through pressure data filtering being extracted the pulse wave amplitude, obtain pulse wave amplitude and corresponding pressure curve thereof after, calculate pressure value.According to the pressure value that calculates, the venting goal pressure is provided with; Wherein according to the scope of diastolic pressure a lower force value is set, after calculating pressure value, target pressure value is set once more then according to the pressure value that calculates in initial venting target pressure value.
Step 114 judges whether to reach the venting target pressure value;
Detailed process is: through current force value and venting target pressure value are compared, judge whether to reach the venting target pressure value; If current force value then needs the repetition above-mentioned steps greater than the venting target pressure value, promptly repeating step 102 is less than or equal to target blow off pressure value to step 113 until the current pressure value.
Step 115, the air valve complete opening is exitted, and finishes to measure;
Detailed process is: if current force value is less than or equal to the venting target pressure value, then measures and finish, the air valve complete opening is exitted.
Wherein, In the step 101 the kinestate flag bit is provided with and preferably is set to not on the thronely, in follow-up step 108 or 111, can or handle the initial setting up that changes this flag bit according to the identification of motion artifacts, when in the step 114 if current force value during greater than the venting target pressure value; When returning step 102 and operating again; Step 104 will judge that after finishing this measurement, flag bit will recover the initial setting up state to the flag bit state after changing.
As shown in Figure 2, the specific embodiment of the present invention is: make up a kind of blood pressure measuring system of anti-motion artifacts, comprise cuff gas path module 201, data acquisition module 202, control unit 203, central processing module 204 and display module 205;
Said cuff gas path module 201 is used for cuff is inflated;
Said data acquisition module 202 links to each other with said cuff gas path module 201, is used to gather the cuff pressure data, then the cuff pressure data is carried out filtering and amplification;
Said control unit 203 links to each other with institute cuff gas path module 201, is used to control inflator pump and cuff is inflated and controlled vent valve and exit;
Said central processing module 204 links to each other with said control unit 203 and data acquisition unit 202 respectively, is used for according to the cuff pressure data that collect pressure value being calculated, and the pressure value that calculates is transferred to display module 205 shows;
Said display module 205 links to each other with said central processing module 204, is used for the pressure value that calculates is shown;
Wherein said control unit 203 comprises vent valve control unit 2031 and inflator pump control unit 2032; Said inflator pump control unit 2032 is used for cuff is carried out ventilating control, and said vent valve control unit 2031 is used for the cuff control of exitting.
Wherein said central processing module 204 comprises that parameter presetting module 301, pressure data acquisition module 302, PWM recruitment computing module 303, kinestate flag bit on-site judgment module 304, motion artifacts identification module 305, motion artifacts processing module 306, PWM value are provided with module 307, pressure value computing module 308, venting target pressure value judge module 309 and measure end module 310;
Said parameter presetting module 301; Be used for the venting parameter is carried out the initialization setting, comprising initial PWM value, venting target pressure value, venting target speed value and other each item threshold values (threshold value and the motion artifacts time threshold that comprise real-time venting speed) are provided with;
Said pressure data acquisition module 302 links to each other with said parameter presetting module 301 and data acquisition module 202, is used to gather the pressure data that is sent by data acquisition module 202;
Said PWM recruitment computing module 303 links to each other with said pressure data acquisition module 302, is used to calculate average venting speed and PWM recruitment;
Said kinestate flag bit judge module 304 links to each other with said PWM recruitment computing module 303, is used to judge whether the kinestate flag bit is on the throne;
Said motion artifacts identification module 305 links to each other with said kinestate flag bit judge module 304; Be used for when said kinestate flag bit judge module 304 judges that the motion flag bit is not on the throne; Motion artifacts is discerned; And when identifying motion artifacts, confirm preceding force value of motion artifacts and PWM value, then force value before the motion artifacts and PWM value are provided with;
Said motion artifacts processing module 306 links to each other with said kinestate flag bit judge module 304, is used for when said kinestate flag bit judge module 304 judges that the motion flag bit is on the throne, motion artifacts being handled; There is motion artifacts in the explanation on the throne of kinestate flag bit this moment, so will handle motion artifacts;
Said PWM value is provided with module 307, links to each other with said motion artifacts identification module 305 and said motion artifacts processing module 306 respectively, is used for according to motion artifacts the PWM value being provided with; Unidentified when going out motion artifacts when judging, PWM value is set, wherein the PWM value be set to current PWM value and PWM recruitment and; When judging when need not replenish gas, perhaps after the parameter of will exitting reinitializes, the PWM value that the PWM value is set to reinitialize; Before obtaining motion artifacts after force value and the PWM value, perhaps when judge do not reach motion artifacts time threshold and motion artifacts before during force value, perhaps when judging that motion artifacts does not finish, the PWM value is set to zero;
Said pressure value computing module 308 is provided with module 307 with said PWM value and links to each other, and is used for the calculating blood pressure value, according to the pressure value that obtains the venting target pressure value is provided with then;
Said venting target pressure value judge module 309 links to each other with said pressure value computing module 308 and pressure data acquisition module 302 respectively; Be used for current pressure value and venting target pressure value are compared; Judge whether the current pressure value reaches the venting target pressure value of setting; If when judging current force value, then be back to the pressure data acquisition module, again pressure data gathered greater than the venting target pressure value;
Said measurement finishes module 310 and links to each other with said venting target pressure value judge module 309, is used for when judging that current force value is less than or equal to the venting target pressure value, the air valve complete opening being exitted to cuff.
Wherein said motion artifacts identification module 305 comprises that force value and PWM value record unit 3051, motion artifacts identification judging unit 3052 and force value and PWM value are provided with unit 3053; Said force value and PWM value record unit 3051 link to each other with said kinestate flag bit on-site judgment module 304, are used for the current pressure value is carried out record, simultaneously the pairing current PWM value of current pressure value are carried out record; Said motion artifacts identification judging unit 3052 links to each other with said force value and PWM value record unit 3051, is used to judge whether to identify motion artifacts; Wherein judge whether to identify motion artifacts and comprise following mode: when the PWM value increases continuously, and cumulative at short notice recruitment then can be judged and identify motion artifacts above the PWM threshold value; Perhaps, then can judge and identify motion artifacts when the absolute value of the real-time venting speed that calculates during greater than certain number of times of the threshold value of preset real-time venting speed; Perhaps current PWM value then can be judged and identify motion artifacts during greater than the certain number of times of threshold value of preset PWM value; Said force value and PWM value are provided with unit 3053 and link to each other with said motion artifacts identification judging unit 3052; Be used for when judgement identifies motion artifacts; Confirm preceding force value of motion artifacts and PWM value; Then force value before the motion artifacts and PWM value are provided with, and the motion flag bit is set on the thronely, and closes gas check valve and stop venting.
Said motion artifacts processing module 306 comprises that time threshold and pressure threshold judging unit 3061, motion end judging unit 3062, make-up gas judging unit 3063 and initialization are provided with unit 3064; Said time threshold and pressure threshold judging unit 3061 link to each other with said kinestate flag bit on-site judgment module 304; Be used for the motion artifacts time is carried out timing; And the time of judging motion artifacts whether reach the motion artifacts time threshold, judge simultaneously whether present force value reaches the force value before the motion artifacts; Said motion finishes judging unit 3062 and links to each other with said time threshold and pressure threshold judging unit 3061; Be used for when the time of judging motion artifacts reaches the motion artifacts time threshold and when judging the force value before present force value reaches motion artifacts, judge whether motion artifacts finishes; Said make-up gas judging unit 3063 finishes judging unit 3062 with said motion and links to each other, and is used for when judging that motion artifacts finishes, and judging whether need be to the cuff make-up gas; Said initialization is provided with unit 3064 and links to each other with said make-up gas judging unit 3063; Judgement is used for when need be inflated to cuff; Open air pump and inflate, reinitialize then the venting parameter is set, comprise PWM value and other parameters are carried out the initialization setting; And the motion flag bit is set to not on the throne.
Of Fig. 4 and Fig. 5, be under the normal condition, when measuring blood pressure, the variation that cuff pressure produces; Wherein the pulse wave signal among Fig. 4 a little less than, the pulse wave signal among Fig. 5 is stronger; And cuff pressure is slowly to diminish along with the time, promptly produces linear variation.
Like Fig. 6 and shown in Figure 7, the situation of change of cuff pressure when producing motion artifacts; Can find out that Fig. 6 in carrying out deflation course motion artifacts has taken place three times, wherein a motion artifacts is comparatively slight, and then the force value fluctuation changes and be little, and other twice motion artifacts is then comparatively serious, so the force value fluctuation changes bigger; And the motion artifacts among Fig. 7 is better than the motion artifacts among Fig. 6, promptly in deflation course, comparatively violent motion artifacts has taken place three times; No matter be stronger motion artifacts or more weak motion artifacts, after identifying motion, all to air valve be closed at every turn, mend then and be inflated to the preceding force value of motion, carry out linear deflation more again after additional gas is intact.
The blood pressure measuring method of a kind of anti-motion artifacts provided by the present invention and system are through analyzing motion artifacts; The cuff that collects during according to motion artifacts is pressed and cuff is pressed the characteristics that change; After interferential identification of design movement and the identification motion artifacts inflator pump and vent valve are carried out the control corresponding processing; Can effectively reduce the gas leakage that causes because of motion artifacts; Thereby effectively increase accuracy and the precision of gathering, improve the accuracy and the effectiveness of the blood pressure measurement under the motion artifacts situation simultaneously.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (9)
1. the blood pressure measuring method of an anti-motion artifacts is characterized in that, may further comprise the steps:
The venting parameter initialization: the venting parameter is carried out the initialization setting, and open air valve and begin venting, venting parameter initialization setting comprises initial p WM value and kinestate flag bit is set;
Gather the cuff pressure data: the cuff pressure data are gathered, and pressure data is carried out denoising and signal processing and amplifying;
Calculate venting speed and PWM recruitment: the pressure data according to gathering calculates average venting speed and PWM recruitment;
Judge kinestate flag bit state: judge whether the kinestate flag bit is on the throne;
Motion artifacts identification: when judging that the motion flag bit is not on the throne, motion artifacts is discerned, when identifying motion artifacts, obtain preceding force value of motion artifacts and PWM value, and the motion flag bit is set on the throne;
Motion artifacts is handled: when judging that the motion flag bit is on the throne, motion artifacts is handled, make the current pressure value reach the preceding force value of motion artifacts, and the motion flag bit is set to not on the throne;
The venting target pressure value is provided with: the force value according to current is calculated pressure value, and according to this pressure value the venting target pressure value is provided with;
Judge whether to reach the venting target pressure value: current force value and venting target pressure value are compared, judge whether the current pressure value reaches the venting target pressure value; If current force value during greater than the venting target pressure value, then is back to and gathers the cuff pressure data step;
Air valve complete opening venting:, then the air valve complete opening is exitted if current force value is less than or equal to when exitting target pressure value.
2. according to the blood pressure measuring method of the said a kind of anti-motion artifacts of claim 1, it is characterized in that said motion artifacts identification step comprises:
Record current pressure value and PWM value: according to the cuff pressure data of gathering, obtain the current pressure value, and the current pressure value is carried out record, simultaneously the pairing PWM value of current pressure value is carried out record;
Judge whether to identify motion artifacts: when the PWM value increases continuously; And when cumulative at short notice recruitment surpasses the PWM threshold value; Perhaps when the absolute value of the average venting speed that calculates during greater than certain number of times of the threshold value of preset real-time venting speed; Perhaps when current PWM value during greater than the certain number of times of threshold value of preset PWM value, then judgement identifies motion artifacts;
Preceding force value of motion artifacts and PWM value are set: when identifying motion artifacts, force value before the motion artifacts and PWM value are obtained, the kinestate flag bit is set on the throne.
3. according to the blood pressure measuring method of the said a kind of anti-motion artifacts of claim 2, it is characterized in that said motion artifacts treatment step comprises:
Judge whether to reach the preceding force value of motion artifacts time threshold and motion artifacts: when there is motion artifacts in judgement; The motion artifacts time is carried out timing; And the time of judging motion artifacts whether reach the motion artifacts time threshold, judge simultaneously whether present force value reaches the force value before the motion artifacts;
Judge whether motion artifacts finishes: when a period of time internal pressure value stabilization is in a certain force value threshold range, judge that then motion artifacts finishes;
Judge whether need to replenish gas: when motion artifacts finishes, and during the force value when present force value is less than motion artifacts before, then judgement need be to the additional gas of cuff;
Benefit is inflated to the preceding force value of motion artifacts: when needs replenish gas, open air-pump inflating, make force value reach the preceding force value of motion artifacts, and the venting parameter is carried out the initialization setting again, the motion flag bit is set to not on the throne, and initial property venting again.
4. according to the blood pressure measuring method of claim 2 or 3 said a kind of anti-motion artifacts; It is characterized in that; Before being provided with, said venting target pressure value comprises that also PWM value is provided with step: when judgement is unidentified when going out motion artifacts; The PWM value is set, wherein the PWM value be set to current PWM value and PWM recruitment with; When judging when need not replenish gas, perhaps after the parameter of will exitting reinitializes, the PWM value that the PWM value is set to reinitialize; Before obtaining motion artifacts after force value and the PWM value, perhaps when judge do not reach motion artifacts time threshold and motion artifacts before during force value, perhaps when judging that motion artifacts does not finish, PWM value is set to zero, and the pass gas check valve, stops to exit.
5. the blood pressure measuring system of an anti-motion artifacts; It is characterized in that, comprise parameter presetting module, pressure data acquisition module, PWM recruitment computing module, kinestate flag bit on-site judgment module, motion artifacts identification module, motion artifacts processing module, pressure value computing module, venting target pressure value judge module and measure the end judge module;
Said parameter presetting module is used for the venting parameter is carried out the initialization setting;
Said pressure data acquisition module links to each other with said parameter presetting module, is used to gather pressure data;
Said PWM recruitment computing module links to each other with said pressure data acquisition module, is used to calculate average venting speed and PWM recruitment;
Said kinestate flag bit judge module links to each other with said PWM recruitment computing module, is used to judge whether the kinestate flag bit is on the throne;
Said motion artifacts identification module links to each other with said kinestate flag bit judge module, is used for when judging that the motion flag bit is not on the throne, motion artifacts being discerned, and force value before the motion artifacts and PWM value being provided with;
Said motion artifacts processing module links to each other with said kinestate flag bit judge module, is used for when judging that the motion flag bit is on the throne, motion artifacts being handled, and makes the current pressure value reach the preceding force value of motion artifacts;
Said pressure value computing module links to each other with said motion artifacts identification module and motion artifacts processing module respectively, is used for pressure value is calculated, and according to the pressure value that calculates the venting target pressure value is provided with then;
Said venting target pressure value judge module links to each other with said pressure value computing module, is used for current pressure value and venting target pressure value are compared, and judges whether the current pressure value reaches the venting target pressure value of setting;
Said measurement finishes module, links to each other with said venting target pressure value judge module, is used for when judging that current force value is less than or equal to the venting target pressure value, then the air valve complete opening being exitted.
6. the blood pressure measuring system of a kind of anti-motion artifacts according to claim 5 is characterized in that, said motion artifacts identification module comprises that force value and PWM value record unit, motion artifacts identification judging unit and force value and PWM value are provided with the unit; Said force value and PWM value record unit link to each other with said kinestate flag bit on-site judgment module, are used for current pressure value and PWM value are carried out record; Said motion artifacts identification judging unit links to each other with said force value and PWM value record unit, is used to judge whether to identify motion artifacts; Said force value and PWM value are provided with the unit and link to each other with said motion artifacts identification judging unit, are used for when judgement identifies motion artifacts, obtain preceding force value of motion artifacts and PWM value, and the motion flag bit is set on the throne.
7. based on the blood pressure measuring system of claim 5 or 6 described a kind of anti-motion artifacts; It is characterized in that said motion artifacts processing module comprises that time threshold and pressure threshold judging unit, motion end judging unit, make-up gas judging unit and initialization are provided with the unit; Said time threshold and pressure threshold judging unit link to each other with said motion state flag bit on-site judgment module; Be used for the motion artifacts time is carried out timing; And the time of judging motion artifacts whether reach the motion artifacts time threshold, and judge whether present force value reaches the preceding force value of motion artifacts; Said motion finishes judging unit and links to each other with said time threshold and pressure threshold judging unit; Be used for when the time of judging motion artifacts reaches the motion artifacts time threshold and when judging the force value before present force value reaches motion artifacts, judge whether motion artifacts finishes; Said make-up gas judging unit finishes judging unit with said motion and links to each other, and is used for when judging that motion artifacts finishes, and judging whether need be to the cuff make-up gas; Said initialization is provided with the unit and links to each other with said make-up gas judging unit, be used for when judgement need be inflated cuff, opening air pump and inflating, and the venting parameter is carried out the initialization setting again, and the motion flag bit is set to not on the throne.
8. the blood pressure measuring system of a kind of anti-motion artifacts according to claim 7; It is characterized in that; Comprise that also the PWM value is provided with module, link to each other with said motion artifacts identification module and said motion artifacts processing module respectively, be used for the PWM value being provided with according to motion artifacts.
9. a blood pressure measuring device is characterized in that, comprises cuff gas path module, data acquisition module, control unit, central processing module and display module; Said cuff gas path module is used for cuff is charged and discharged gas; Said data acquisition module links to each other with said cuff gas path module, is used to gather the cuff pressure data, then the cuff pressure data is carried out filtering and amplification; Said control unit links to each other with institute cuff gas path module, is used to control inflator pump and cuff is inflated and controlled vent valve and exit; Said central processing module links to each other with said control unit and data acquisition unit respectively; Be used for pressure value being calculated, and be arranged in the said central processing module like the blood pressure measuring system of the described a kind of anti-motion artifacts of each claim of claim 5 to 8 according to the cuff pressure data that collect; Said display module links to each other with said central processing module, is used for the pressure value that calculates is shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210119632.0A CN102626308B (en) | 2012-04-23 | 2012-04-23 | Blood pressure measurement method resistant to movement interference and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210119632.0A CN102626308B (en) | 2012-04-23 | 2012-04-23 | Blood pressure measurement method resistant to movement interference and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102626308A true CN102626308A (en) | 2012-08-08 |
| CN102626308B CN102626308B (en) | 2014-06-04 |
Family
ID=46584828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210119632.0A Active CN102626308B (en) | 2012-04-23 | 2012-04-23 | Blood pressure measurement method resistant to movement interference and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102626308B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017193594A1 (en) * | 2016-05-11 | 2017-11-16 | 广州视源电子科技股份有限公司 | Pwm circuit duty ratio adjustment method and system for blood pressure measurement apparatus |
| CN109394194A (en) * | 2016-10-25 | 2019-03-01 | 深圳市柯林健康医疗有限公司 | A kind of blood pressure measuring method and system of staircase method anti motion interference |
| WO2019227329A1 (en) * | 2018-05-30 | 2019-12-05 | 深圳迈瑞生物医疗电子股份有限公司 | Method for optimizing blood pressure measurement, and blood pressure measurement apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0260633A (en) * | 1988-08-26 | 1990-03-01 | Koorin Denshi Kk | Cuff pressure controller for automatic hemadynamometer |
| JPH0634781B2 (en) * | 1990-10-24 | 1994-05-11 | オムロン株式会社 | Electronic blood pressure monitor |
| JPH0824230A (en) * | 1994-07-15 | 1996-01-30 | Omron Corp | Pressure reducing control device and electronic hemomanometer |
| CN1394546A (en) * | 2002-08-08 | 2003-02-05 | 天津市先石光学技术有限公司 | Blood pressure measuring device and method |
| CN1418595A (en) * | 2002-12-26 | 2003-05-21 | 天津市先石光学技术有限公司 | Wrist type electric sphygmomanometer, and its application method |
| JP3818853B2 (en) * | 2001-01-17 | 2006-09-06 | テルモ株式会社 | Electronic blood pressure monitor |
-
2012
- 2012-04-23 CN CN201210119632.0A patent/CN102626308B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0260633A (en) * | 1988-08-26 | 1990-03-01 | Koorin Denshi Kk | Cuff pressure controller for automatic hemadynamometer |
| JPH0634781B2 (en) * | 1990-10-24 | 1994-05-11 | オムロン株式会社 | Electronic blood pressure monitor |
| JPH0824230A (en) * | 1994-07-15 | 1996-01-30 | Omron Corp | Pressure reducing control device and electronic hemomanometer |
| JP3818853B2 (en) * | 2001-01-17 | 2006-09-06 | テルモ株式会社 | Electronic blood pressure monitor |
| CN1394546A (en) * | 2002-08-08 | 2003-02-05 | 天津市先石光学技术有限公司 | Blood pressure measuring device and method |
| CN1418595A (en) * | 2002-12-26 | 2003-05-21 | 天津市先石光学技术有限公司 | Wrist type electric sphygmomanometer, and its application method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017193594A1 (en) * | 2016-05-11 | 2017-11-16 | 广州视源电子科技股份有限公司 | Pwm circuit duty ratio adjustment method and system for blood pressure measurement apparatus |
| CN109394194A (en) * | 2016-10-25 | 2019-03-01 | 深圳市柯林健康医疗有限公司 | A kind of blood pressure measuring method and system of staircase method anti motion interference |
| WO2019227329A1 (en) * | 2018-05-30 | 2019-12-05 | 深圳迈瑞生物医疗电子股份有限公司 | Method for optimizing blood pressure measurement, and blood pressure measurement apparatus |
| CN112135559A (en) * | 2018-05-30 | 2020-12-25 | 深圳迈瑞生物医疗电子股份有限公司 | Optimization method for blood pressure measurement and blood pressure measurement device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102626308B (en) | 2014-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20230058894A1 (en) | Air detection system and method for detecting air in a pump of an infusion system | |
| CN102270264B (en) | Physiological signal quality evaluation system and method | |
| CN103156583B (en) | Device for assessing function of vascular endothelium | |
| EP1195133B1 (en) | Oscillometric blood pressure monitor with improved perfomance in the presence of arrhythmias | |
| WO2014047310A4 (en) | System and method for determining sleep stage | |
| CN104132250B (en) | A kind of pipe leakage characteristic vector pickup method based on improvement wavelet packet | |
| CN106640722B (en) | A kind of device and method of pneumatic stability of gas compressor diagnosis and control | |
| CN108804740B (en) | Long-distance pipeline pressure monitoring method based on integrated improved ICA-KRR algorithm | |
| CN102626308A (en) | Blood pressure measurement method resistant to movement interference and system | |
| CN104575491B (en) | The method and device for the method for identification and the damage event on classification vehicle | |
| CN109214355B (en) | Mechanical monitoring data abnormal section detection method based on kernel estimation LOF | |
| CN102090883A (en) | Automatic identification method and device for fetal movement | |
| WO2008042347A3 (en) | Smart balloon catheter | |
| CN113143238B (en) | Blood pressure measuring device based on pressure signal and PPG signal | |
| US20110308299A1 (en) | Pressure guiding tube blockage diagnosing device and blockage diagnosing method | |
| CN105212915A (en) | Personalized at the real-time non-invasive detection methods of body blood pressure | |
| CN104042200B (en) | A kind of non-invasive monitoring devices and methods therefor of arteriotony by shooting | |
| CN108143419A (en) | A kind of resting metabolic rate fast acquiring method based on the analysis of sliding window heart rate signal | |
| CN106539562A (en) | A kind of method by pulse wave evaluation of cardiac function | |
| CN112208506A (en) | Intelligent fault detection method for air brake device of railway wagon | |
| JP2014530642A5 (en) | ||
| CN110420014A (en) | The wearable cardiovascular function evaluation system and method intelligently decomposed based on pulse wave | |
| CN109297928B (en) | A kind of method and system detecting soy sauce quality | |
| CN101782964A (en) | Weight loss feather extraction method based on acceleration transducer | |
| CN103445792A (en) | Step metering method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |