CN105708433A - Protection method and device applied to non-invasive blood pressure measurement system - Google Patents
Protection method and device applied to non-invasive blood pressure measurement system Download PDFInfo
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/02233—Occluders specially adapted therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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Abstract
The invention discloses a protection method and device applied to a non-invasive blood pressure measurement system, wherein the protection method comprises the following steps: detecting pressure values of the non-invasive blood pressure measurement system on a first position and a second position, so that a first cuff pressure value and a second cuff pressure value are obtained, wherein the first position and the second position are two different positions in a same air conduit; calculating the absolute value of a difference of the first cuff pressure value and the second cuff pressure value, so as to obtain a pressure difference; comparing the pressure difference with a preset pressure difference threshold as a detection value; and ending the current blood pressure measurement task of the non-invasive blood pressure measurement system when the detection value is more than the pressure difference threshold. According to the technical scheme provided by the invention, the safety of the non-invasive blood pressure measurement system can be effectively improved.
Description
Technical field
The present invention relates to processing of biomedical signals field, be specifically related to a kind of non-invasive blood pressure that is applied to and measure means of defence and the device of system.
Background technology
Blood pressure is the pressure that blood vessel wall is produced by blood when intravascular flow, as the physiological parameter that body weight for humans is wanted, blood pressure can reflect the function status of human heart and blood vessel, thus become and diagnose the illness clinically, observe therapeutic effect, carry out the important evidence of Index for diagnosis etc..The measurement of blood pressure can be passed through directly or indirectly two kinds of methods and realize, and direct method is invasive blood pressure measuring method, by conduit is inserted people's Ink vessel transfusing, pressure transducer obtains pressure value；Indirect method is non-invasive blood pressure measuring method, obtains pressure value by being analyzed relevant characteristic signal processing.
The measurements adopting non-invasive blood pressure measuring method to carry out blood pressure at present more, but, human body, by pressurizeing thus interruption artery blood flow to cuff inflation, if the Stress control in cuff is improper, can be worked the mischief by non-invasive blood pressure measuring method.So in the world for the safety of blood pressure measuring function and the design of effectiveness with evaluate and have detailed standard, such as ANSI/AAMISP10:2002 standard and IEC80601-2-30 (Edition1.02009-01) standard, safety is proposed requirement by the two standard especially.It is to safety requirement below in IEC80601-2-30 (Edition1.02009-01) standard:
One, during normal use, under neonate pattern, the maximum pressure value that non-invasive blood pressure is measured may not exceed 150mmHg (i.e. millimetres of mercury)；Under other pattern, the maximum pressure value that non-invasive blood pressure is measured may not exceed 300mmHg；
Two, when single failure:
The time of+10% scope (namely neonate pattern downforce value is more than 165mmHg, and other pattern downforce value is more than 330mmHg) that a, force value exceed maximum pressure value not can exceed that 3 seconds；
B, force value exceed maximum pressure value but time in+10% scope of maximum pressure value not can exceed that 15 seconds.
The requirement of standard and existing processing scheme are all according to when single failure (fault namely being broken down by individual devices in non-invasive blood pressure measurement process or causing due to single reason); after there occurs the situations such as pressure superelevation, time-out; carry out overvoltage protection as closed pump, open the measures such as valve.But during this time pressure superelevation and time-out cause injury to measured user, and the measure of overvoltage protection can only reduce the extent of injury to measured user, it is impossible to avoids injury.
Summary of the invention
The present invention provides a kind of non-invasive blood pressure that is applied to measure means of defence and the device of system, measures the safety of system for improving non-invasive blood pressure.
One aspect of the present invention provides a kind of non-invasive blood pressure that is applied to measure the means of defence of system, including:
Detection non-invasive blood pressure measures the primary importance of system and the force value of the second position respectively, obtains the first cuff pressure value and the second cuff pressure value, and wherein, above-mentioned primary importance and said second position are two diverse locations in same gas circuit；
Calculate the absolute value of the difference of above-mentioned first cuff pressure value and above-mentioned second cuff pressure value, obtain pressure differential；
Above-mentioned pressure differential is compared as detected value with the threshold pressure difference preset；
If above-mentioned detected value is more than above-mentioned threshold pressure difference, then terminates above-mentioned non-invasive blood pressure and measure the blood pressure measurement task that system is current.
Another aspect of the present invention provides a kind of non-invasive blood pressure that is applied to measure the preventer of system, including:
First detection unit, for detecting the force value that non-invasive blood pressure measures the primary importance of system, obtains the first cuff pressure value；
Second detection unit, for detecting the force value that above-mentioned non-invasive blood pressure measures the second position of system, obtains the second cuff pressure value；
First computing unit, for calculating the absolute value of the difference of above-mentioned first cuff pressure value and above-mentioned second cuff pressure value, obtains pressure differential；
Comparing unit, for comparing above-mentioned pressure differential with the threshold pressure difference preset as detected value；
Control unit, for when above-mentioned comparing unit compares above-mentioned detected value more than above-mentioned threshold pressure difference, terminating above-mentioned non-invasive blood pressure and measure the blood pressure measurement task that system is current；
Wherein, above-mentioned primary importance and said second position are two diverse locations in same gas circuit.
Therefore; the present invention detects and calculates non-invasive blood pressure and measure the pressure differential of two diverse locations in the same gas circuit of system; when pressure differential reaches a degree of time (time namely more than default threshold pressure difference); namely safety precautions (namely terminate this non-invasive blood pressure and measure the blood pressure measurement task that system is current) is taked; the fault caused due to the reason such as device or gas circuit can be early found; from source, avoid the generation of harm, and then improve the safety of non-invasive blood pressure measurement system.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that a kind of non-invasive blood pressure that is applied to provided by the invention measures one embodiment schematic flow sheet of means of defence of system；
Fig. 2 is that a kind of non-invasive blood pressure that is applied to provided by the invention measures another embodiment schematic flow sheet of means of defence of system；
Fig. 3 is that a kind of non-invasive blood pressure that is applied to provided by the invention measures one example structure schematic diagram of preventer of system；
Fig. 4 is that a kind of non-invasive blood pressure provided by the invention measures one example structure schematic diagram of system.
Detailed description of the invention
For making the goal of the invention of the present invention, feature, the advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, and not all embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment one
The embodiment of the present invention provides a kind of non-invasive blood pressure that is applied to measure the means of defence of system, and this non-invasive blood pressure is measured system and referred to and adopt the non-invasive blood pressure measuring method blood pressure measuring method of cuff inflation pressurization interruption artery blood flow (such as Korotkoff's Sound auscultation and the oscillographic method etc. utilize) to measure the blood pressure measuring system of blood pressure.Refer to Fig. 1, the means of defence in the embodiment of the present invention, including:
Step 101, respectively detection non-invasive blood pressure measure the primary importance of system and the force value of the second position, obtain the first cuff pressure value and the second cuff pressure value；
Wherein, above-mentioned primary importance and said second position are two diverse locations in same gas circuit, that is, above-mentioned the first cuff pressure value recorded and the second cuff pressure value are the force value that non-invasive blood pressure measures two diverse locations in the same cuff of system.
The embodiment of the present invention can be detected by pressure transducer the force value of above-mentioned primary importance and the second position, specifically, two pressure transducers can be individually positioned in above-mentioned primary importance and said second position detects.In general, when pressure is in static state, above-mentioned first cuff pressure value and above-mentioned second cuff pressure value are equal, and when pressure is in dynamically (namely having air-flow to change), above-mentioned first cuff pressure value and above-mentioned second cuff pressure value may be different.
The embodiment of the present invention, can non-invasive blood pressure measure system enable time, detect the force value of above-mentioned primary importance and said second position in real time, or, an interval can also be preset, when non-invasive blood pressure measurement system enables, every this interval, the force value of above-mentioned primary importance and said second position is detected, be not construed as limiting herein.
Step 102, calculate the absolute value of the difference of above-mentioned first cuff pressure value and above-mentioned second cuff pressure value, obtain pressure differential；
Illustrating, if current procedures 101 detects above-mentioned first cuff pressure value and difference respectively A1 and the B1 of above-mentioned second cuff pressure value, then calculating the absolute value of the difference of A1 and B1, obtaining pressure differential is: | A1-B1 |.
Step 103, using above-mentioned pressure differential as detected value with preset threshold pressure difference compare；
In the embodiment of the present invention, each for step 102 calculated pressure differential is compared with the threshold pressure difference preset, with this calculated pressure differential of determination step 102 whether more than this threshold pressure difference.
Owing to when non-invasive blood pressure measurement system is in different conditions, the pace of change of air pressure and air-flow is likely to different, therefore, measures system state in which for non-invasive blood pressure and set corresponding threshold pressure difference, it is possible to identify fault more exactly.Optionally, for non-invasive blood pressure measure system various states (such as holding state, measure inflated condition, measure in deflation status and be measured deflation status) corresponding threshold pressure difference is set so that non-invasive blood pressure measures every kind of state corresponding threshold pressure difference respectively of system.Such as: when non-invasive blood pressure measurement system is in holding state, owing to now measuring valve and relief valve all in opening, system air pressure should be suitable with atmospheric pressure, and does not have any action, and therefore, threshold pressure difference can arrange smaller value, for instance is set to 3mmHg；When non-invasive blood pressure measurement system is in measurement inflated condition, owing to now system gas is pressed in Rapid Variable Design, therefore threshold pressure difference can arrange higher value, for instance 15mmHg；When non-invasive blood pressure measurement system is in deflation status in measurement, where there is two kinds of situations, one is linear deflation, system air pressure change is slower, threshold pressure difference may be configured as 8mmHg, alternative step is exitted, it is less that system gas is pressed in plateau change, threshold pressure difference may be configured as 5mmHg, further, can also by the change of deflation status, identify that non-invasive blood pressure measures the Rapid degassing stage whether system is between step, if being in this Rapid degassing stage, owing to this phase duration is very short, can suspend and compare (namely suspend and perform step 103), after treating the Rapid degassing stage, reenter the step platform phase, then re-execute step 103, pressure fluctuations pressure comparison result huge when avoiding step platform transition.On this basis, step 103 specifically includes: determine current noinvasive blood pressure measuring system state in which；This non-invasive blood pressure obtained and currently determine measures the threshold pressure difference that system state in which is corresponding；Calculated for step 102 pressure differential is compared as detected value with the current above-mentioned threshold pressure difference obtained.It should be noted that, above-mentioned for non-invasive blood pressure measure system holding state, measure inflated condition, measure in deflation status and be measured four kinds of states of deflation status and illustrate, measure other state (such as piezometer pattern when non-measured state, gas leakage detection pattern etc. also can have the states such as inflation, venting) of system at non-invasive blood pressure and can refer to foregoing description and carry out the adjustment of threshold pressure difference.
Optionally, according to measurement procedure (such as, after being inflated to goal pressure, repeatedly step is exitted, and enters holding state after being measured) and current system pressure, it is determined that non-invasive blood pressure measures system state in which.Or, it is also possible to determine that non-invasive blood pressure measures system state in which by the speed of air pressure change, be not construed as limiting herein.
If the above-mentioned detected value of step 104 is more than above-mentioned threshold pressure difference, then terminates above-mentioned non-invasive blood pressure and measure the blood pressure measurement task that system is current；
In present example, when comparing above-mentioned detected value more than above-mentioned threshold pressure difference, take safety precautions, namely terminate above-mentioned non-invasive blood pressure and measure the blood pressure measurement task that system is current.
Specifically, the above-mentioned non-invasive blood pressure of above-mentioned termination is measured the action of the current blood pressure measurement task of system and is included: closes above-mentioned non-invasive blood pressure and measures the air pump of system, and opens measurement valve and/or the relief valve of above-mentioned non-invasive blood pressure measurement system；Or, it is also possible to only include closing above-mentioned non-invasive blood pressure and measure the air pump of system；Or, it is also possible to only open above-mentioned non-invasive blood pressure and measure measurement valve and/or the relief valve of system, be not construed as limiting herein.
Further, when comparing above-mentioned detected value more than above-mentioned threshold pressure difference, it is also possible to output abnormality alarm signal, in order to staff (such as medical personnel) can pinpoint the problems in time.
Further, if above-mentioned detected value is not more than above-mentioned threshold pressure difference, then immediately or wait returning after preset duration and perform step 101.
Therefore; the present invention detects and calculates non-invasive blood pressure and measure the pressure differential of two diverse locations in the same gas circuit of system; when pressure differential reaches a degree of time (time namely more than default threshold pressure difference); namely safety precautions (namely terminate this non-invasive blood pressure and measure the blood pressure measurement task that system is current) is taked; the fault caused due to the reason such as device or gas circuit can be early found; from source, avoid the generation of harm, and then improve the safety of non-invasive blood pressure measurement system.
Embodiment two
In order to avoid the erroneous judgement that abnormal pressure fluctuation (motion of such as user's body or shake make pressure measxurement fluctuation occur) causes, the embodiment of the present invention replaces the pressure differential of a single point by calculating repeatedly the meansigma methods of pressure differential, the another kind below embodiment of the present invention provided is applied to the means of defence of non-invasive blood pressure measurement system and illustrates, same, this non-invasive blood pressure is measured system and is referred to and adopt the non-invasive blood pressure measuring method blood pressure measuring method of cuff inflation pressurization interruption artery blood flow (such as Korotkoff's Sound auscultation and the oscillographic method etc. utilize) to measure the blood pressure measuring system of blood pressure.Refer to Fig. 2, the means of defence in the embodiment of the present invention, including:
Step 201, respectively detection non-invasive blood pressure measure the primary importance of system and the force value of the second position, obtain the first cuff pressure value and the second cuff pressure value；
Wherein, above-mentioned primary importance and said second position are two diverse locations in same gas circuit, that is, above-mentioned the first cuff pressure value recorded and the second cuff pressure value are the force value that non-invasive blood pressure measures two diverse locations in the same cuff of system.
The embodiment of the present invention can be detected by pressure transducer the force value of above-mentioned primary importance and the second position, specifically, two pressure transducers can be individually positioned in above-mentioned primary importance and said second position detects.In general, when pressure is in static state, above-mentioned first cuff pressure value and above-mentioned second cuff pressure value are equal, and when pressure is in dynamically (namely having air-flow to change), above-mentioned first cuff pressure value and above-mentioned second cuff pressure value may be different.
The embodiment of the present invention, can non-invasive blood pressure measure system enable time, detect the force value of above-mentioned primary importance and said second position in real time, or, an interval can also be preset, when non-invasive blood pressure measurement system enables, every this interval, the force value of above-mentioned primary importance and said second position is detected, be not construed as limiting herein.
Step 202, calculate the absolute value of the difference of above-mentioned first cuff pressure value and above-mentioned second cuff pressure value, obtain pressure differential；
Illustrating, if current procedures 201 detects above-mentioned first cuff pressure value and difference respectively A1 and the A2 of above-mentioned second cuff pressure value, then calculating the absolute value of the difference of A1 and A2, obtaining pressure differential is: | A1-A2 |.
Step 203, N continuous time calculated above-mentioned pressure differential is averaged, obtain average differential pressure；
Wherein, above-mentioned N is preset value and more than or equal to 2, and specifically, the value of N can be set according to actual needs, is not construed as limiting herein.
Illustrate, if N takes 3, then step 201 detects above-mentioned first cuff pressure value and difference respectively A1, A2, A3 and B1, B2, B3 of above-mentioned second cuff pressure value for continuous 3 times, then in step 203, continuous 3 calculated above-mentioned pressure differentials being averaged, obtaining average differential pressure is: (| A1-B1 |+| A2-B2 |+| A3-B3 |)/3.
Step 204, using above-mentioned average differential pressure as detected value with preset threshold pressure difference compare；
In the embodiment of the present invention, each for step 203 calculated pressure differential is compared with the threshold pressure difference preset, with this calculated pressure differential of determination step 203 whether more than this threshold pressure difference.
Owing to when non-invasive blood pressure measurement system is in different conditions, the pace of change of air pressure and air-flow is likely to different, therefore, measures system state in which for non-invasive blood pressure and set corresponding threshold pressure difference, it is possible to identify fault more exactly.Optionally, for non-invasive blood pressure measure system various states (such as holding state, measure inflated condition, measure in deflation status and be measured deflation status) corresponding threshold pressure difference is set so that non-invasive blood pressure measures every kind of state corresponding threshold pressure difference respectively of system.Such as: when non-invasive blood pressure measurement system is in holding state, owing to now measuring valve and relief valve all in opening, system air pressure should be suitable with atmospheric pressure, and does not have any action, and therefore, threshold pressure difference can arrange smaller value, for instance is set to 3mmHg；When non-invasive blood pressure measurement system is in measurement inflated condition, owing to now system gas is pressed in Rapid Variable Design, therefore threshold pressure difference can arrange higher value, for instance 15mmHg；When non-invasive blood pressure measurement system is in deflation status in measurement, where there is two kinds of situations, one is linear deflation, system air pressure change is slower, threshold pressure difference may be configured as 8mmHg, alternative step is exitted, it is less that system gas is pressed in plateau change, threshold pressure difference may be configured as 5mmHg, further, can also by the change of deflation status, identify that non-invasive blood pressure measures the Rapid degassing stage whether system is between step, if being in this Rapid degassing stage, owing to this phase duration is very short, can suspend and compare, after treating the Rapid degassing stage, reenter the step platform phase, then re-start and compare, pressure fluctuations pressure comparison result huge when avoiding step platform transition.On this basis, step 204 specifically includes: determine current noinvasive blood pressure measuring system state in which；This non-invasive blood pressure obtained and currently determine measures the threshold pressure difference that system state in which is corresponding；Calculated for step 204 average differential pressure is compared as detected value with the current above-mentioned threshold pressure difference obtained.It should be noted that, above-mentioned for non-invasive blood pressure measure system holding state, measure inflated condition, measure in deflation status and be measured four kinds of states of deflation status and illustrate, measure other state (such as piezometer pattern when non-measured state, gas leakage detection pattern etc. also can have the states such as inflation, venting) of system at non-invasive blood pressure and can refer to foregoing description and carry out the adjustment of threshold pressure difference.
Optionally, according to measurement procedure (such as, after being inflated to goal pressure, repeatedly step is exitted, and enters holding state after being measured) and current system pressure, it is determined that non-invasive blood pressure measures system state in which.Or, it is also possible to determine that non-invasive blood pressure measures system state in which by the speed of air pressure change, be not construed as limiting herein.
If the above-mentioned detected value of step 205 is more than above-mentioned threshold pressure difference, then terminates above-mentioned non-invasive blood pressure and measure the blood pressure measurement task that system is current；
In present example, when comparing above-mentioned detected value more than above-mentioned threshold pressure difference, take safety precautions, namely terminate above-mentioned non-invasive blood pressure and measure the blood pressure measurement task that system is current.
Specifically, the above-mentioned non-invasive blood pressure of above-mentioned termination is measured the action of the current blood pressure measurement task of system and is included: closes above-mentioned non-invasive blood pressure and measures the air pump of system, and opens measurement valve and/or the relief valve of above-mentioned non-invasive blood pressure measurement system；Or, it is also possible to only include closing above-mentioned non-invasive blood pressure and measure the air pump of system；Or, it is also possible to only open above-mentioned non-invasive blood pressure and measure measurement valve and/or the relief valve of system, be not construed as limiting herein.
Further, when comparing above-mentioned detected value more than above-mentioned threshold pressure difference, it is also possible to output abnormality alarm signal, in order to staff (such as medical personnel) can pinpoint the problems in time.
Further, if above-mentioned detected value is not more than above-mentioned threshold pressure difference, then immediately or wait returning after preset duration and perform step 201.
Therefore; the present invention detects and calculates non-invasive blood pressure and measure the pressure differential of two diverse locations in the same gas circuit of system; when pressure differential reaches a degree of time (time namely more than default threshold pressure difference); namely safety precautions (namely terminate this non-invasive blood pressure and measure the blood pressure measurement task that system is current) is taked; the fault caused due to the reason such as device or gas circuit can be early found; from source, avoid the generation of harm, and then improve the safety of non-invasive blood pressure measurement system.
Embodiment three
The embodiment of the present invention provides a kind of non-invasive blood pressure that is applied to measure the preventer of system, and this non-invasive blood pressure is measured system and referred to and adopt the non-invasive blood pressure measuring method blood pressure measuring method of cuff inflation pressurization interruption artery blood flow (such as Korotkoff's Sound auscultation and the oscillographic method etc. utilize) to measure the blood pressure measuring system of blood pressure.Refer to Fig. 3, the preventer in the embodiment of the present invention, including:
First detection unit 301, for detecting the force value that non-invasive blood pressure measures the primary importance of system, obtains the first cuff pressure value；
Second detection unit 302, for detecting the force value that above-mentioned non-invasive blood pressure measures the second position of system, obtains the second cuff pressure value；
First computing unit 303, for calculating the absolute value of the difference of above-mentioned first cuff pressure value and above-mentioned second cuff pressure value, obtains pressure differential；
Comparing unit 304, for comparing above-mentioned pressure differential with the threshold pressure difference preset as detected value；
Control unit 305, for when comparing unit 304 compares above-mentioned detected value more than above-mentioned threshold pressure difference, terminating above-mentioned non-invasive blood pressure and measure the blood pressure measurement task that system is current；
Wherein, above-mentioned primary importance and said second position are two diverse locations in same gas circuit, that is, above-mentioned the first cuff pressure value recorded and the second cuff pressure value are the force value that non-invasive blood pressure measures two diverse locations in the same cuff of system.
Optionally, the preventer in the embodiment of the present invention also includes: the second computing unit, for above-mentioned first computing unit N continuous time calculated above-mentioned pressure differential being averaged, obtains average differential pressure, and wherein, N is preset value and more than or equal to 2；Comparing unit 304 specifically for: using above-mentioned average differential pressure as detected value with preset threshold pressure difference compare.
Optionally, above-mentioned non-invasive blood pressure is measured system and is included following four kinds of states: holding state, measure inflated condition, measure in deflation status and be measured deflation status, above-mentioned four kinds of states are corresponding four threshold pressure difference respectively；Comparing unit 304 also comprises determining that unit, is used for determining that current above-mentioned non-invasive blood pressure measures system state in which；Acquiring unit, measures, with the currently above-mentioned above-mentioned non-invasive blood pressure determining that unit is determined, the threshold pressure difference that system state in which is corresponding for obtaining；Sub-comparing unit, for comparing above-mentioned pressure differential with the current above-mentioned threshold pressure difference obtained as detected value.
Optionally, control unit 305 specifically for: when comparing unit 304 compares above-mentioned detected value more than above-mentioned threshold pressure difference, close above-mentioned non-invasive blood pressure and measure the air pump of system, and open above-mentioned non-invasive blood pressure and measure the measurement valve of system and/or relief valve.
Optionally, the preventer in the embodiment of the present invention also includes: alarm output unit, is used for when comparing unit 304 compares above-mentioned detected value more than above-mentioned threshold pressure difference, output abnormality alarm signal.
It should be noted that, preventer in the embodiment of the present invention specifically can be integrated in the main frame that above-mentioned non-invasive blood pressure measures system, this preventer may be used for realizing the whole technical schemes in above-described embodiment one or embodiment two, the function of its each functional module can implement according to the method in above-described embodiment one or embodiment two, it implements the associated description that process can refer in above-described embodiment, repeats no more herein.
Therefore; the present invention detects and calculates non-invasive blood pressure and measure the pressure differential of two diverse locations in the same gas circuit of system; when pressure differential reaches a degree of time (time namely more than default threshold pressure difference); namely safety precautions (namely terminate this non-invasive blood pressure and measure the blood pressure measurement task that system is current) is taked; the fault caused due to the reason such as device or gas circuit can be early found; from source, avoid the generation of harm, and then improve the safety of non-invasive blood pressure measurement system.
Embodiment four
The structure that a kind of non-invasive blood pressure of means of defence shown in Application Example one or embodiment two is measured in the embodiment of the present invention system is described, and as shown in Figure 4, this non-invasive blood pressure is measured system and included:
Blood pressure gas circuit and cuff 401, main measuring circuit 402, safety protective circuit 403 and pump valve control circuit 404.Wherein:
Main measuring circuit 402 includes: primary pressure sensor circuit 4021 and master microprocessor circuit 4022.
Primary pressure sensor circuit 4021 gathers blood pressure gas circuit and the pressure signal of cuff 401, inputs to master microprocessor circuit 4022.
Master microprocessor circuit 4022 is mainly used in: the pressure signal of primary pressure sensor circuit 4021 input is sampled and calculates (such as calculate and shrink pressure, diastolic pressure, mean pressure, pulse frequency and other result)；By pump valve control circuit 404, air pump and the startup of valve (such as measuring valve and/or relief valve), closedown, inflation, venting speed are controlled.Further; master microprocessor circuit 4022 also includes: pressure comparison unit (not shown); for calculating in same gas circuit the pressure differential (or average differential pressure) of two not coordinatioies, determine whether to perform safety precautions (such as terminate this non-invasive blood pressure and measure the current blood pressure measurement task of system, output abnormality alarm signal etc.) by comparing pressure differential (or average differential pressure) and the size of threshold pressure difference.
Safety protective circuit 403 includes: auxiliary pressure sensor circuit 4031 and support microprocessor circuit 4032.Auxiliary pressure sensor circuit 4031 gathers blood pressure gas circuit and the pressure signal of cuff 401, inputs to support microprocessor circuit 4031.
Support microprocessor circuit 4032 is mainly used in: the pressure signal of auxiliary pressure sensor circuit 4031 input is sampled; perform safety precautions by detecting the control signal of pressure change and reduced pressure difference generation pump valve, and air pump and the power supply signal of valve (such as relief valve and/or measurement valve) can be monitored.Further; support microprocessor circuit 4032 also includes: pressure comparison unit (not shown); for calculating in same gas circuit the pressure differential (or average differential pressure) of two not coordinatioies, determine whether to perform safety precautions (such as terminate this non-invasive blood pressure and measure the current blood pressure measurement task of system, output abnormality alarm signal etc.) by comparing pressure differential (or average differential pressure) and the size of threshold pressure difference.
It should be noted that, above-mentioned pressure comparison unit both can be arranged in master microprocessor circuit 4022, can also be arranged in support microprocessor circuit 4032, in embodiments of the present invention, master microprocessor circuit 4022 and support microprocessor circuit 4032 are provided with above-mentioned pressure comparison unit, so, when wherein a path processor circuit breaks down time, it is also possible to normal operation.It is of course also possible to above-mentioned pressure comparison unit is arranged on the place except master microprocessor circuit 4022 and support microprocessor circuit 4032, it is not construed as limiting herein.
Pump valve control circuit 404 is mainly used in: accept master microprocessor circuit 4022 and the control signal of support microprocessor circuit 4032, and air pump and valve (such as measuring valve and/or relief valve) are carried out on-off control.
It should be noted that in several embodiments provided herein, it should be understood that disclosed apparatus and method, it is possible to realize by another way.Such as, device embodiment described above is merely schematic, such as, the division of said units, being only a kind of logic function to divide, actual can have other dividing mode when realizing, for instance multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some interfaces, device or unit, it is possible to be electrical, machinery or other form.
For aforesaid each embodiment of the method, in order to simplicity describes, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other order or carry out simultaneously.Secondly, those skilled in the art also should know, it might not be all necessary to the present invention that embodiment described in this description belongs to preferred embodiment, involved action and module.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, certain embodiment there is no the part described in detail, it is possible to referring to the associated description of other embodiments.
More than for a kind of non-invasive blood pressure that is applied to provided by the present invention is measured the means of defence of system and the description of device, for one of ordinary skill in the art, thought according to the embodiment of the present invention, all will change in specific embodiments and applications, to sum up, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. the means of defence being applied to non-invasive blood pressure measurement system, it is characterised in that including:
Detection non-invasive blood pressure measures the primary importance of system and the force value of the second position respectively, obtains the first cuff pressure value and the second cuff pressure value, and wherein, described primary importance and the described second position are two diverse locations in same gas circuit；
Calculate the absolute value of the difference of described first cuff pressure value and described second cuff pressure value, obtain pressure differential；
Described pressure differential is compared as detected value with the threshold pressure difference preset；
If described detected value is more than described threshold pressure difference, then terminates described non-invasive blood pressure and measure the blood pressure measurement task that system is current.
2. method according to claim 1, it is characterised in that
Described obtain pressure differential after also include: N continuous time calculated described pressure differential being averaged, obtain average differential pressure, wherein, N is preset value and more than or equal to 2；
Described using described pressure differential as detected value with preset threshold pressure difference compare particularly as follows:
Described average differential pressure is compared as detected value with the threshold pressure difference preset.
3. method according to claim 1, it is characterized in that, described non-invasive blood pressure is measured system and is included following four kinds of states: holding state, measure inflated condition, measure in deflation status and be measured deflation status, every kind of state in described four kinds of states is a corresponding threshold pressure difference respectively；
Described using described pressure differential as detected value with preset threshold pressure difference compare, including:
Determine that presently described non-invasive blood pressure measures system state in which；
The described non-invasive blood pressure obtained and currently determine measures the threshold pressure difference that system state in which is corresponding；
Described pressure differential is compared as detected value with the current described threshold pressure difference obtained.
4. the method according to any one of claims 1 to 3, it is characterized in that, the blood pressure measurement task that the described non-invasive blood pressure of described termination measures system current includes: closes described non-invasive blood pressure and measures the air pump of system, and opens measurement valve and/or the relief valve of described non-invasive blood pressure measurement system.
5. the method according to any one of claims 1 to 3, it is characterised in that if described detected value is more than described threshold pressure difference, described method also includes:
Output abnormality alarm signal.
6. the preventer being applied to non-invasive blood pressure measurement system, it is characterised in that including:
First detection unit, for detecting the force value that non-invasive blood pressure measures the primary importance of system, obtains the first cuff pressure value；
Second detection unit, for detecting the force value that described non-invasive blood pressure measures the second position of system, obtains the second cuff pressure value；
First computing unit, for calculating the absolute value of the difference of described first cuff pressure value and described second cuff pressure value, obtains pressure differential；
Comparing unit, for comparing described pressure differential with the threshold pressure difference preset as detected value；
Control unit, for when described comparing unit compares described detected value more than described threshold pressure difference, terminating described non-invasive blood pressure and measure the blood pressure measurement task that system is current；
Wherein, described primary importance and the described second position are two diverse locations in same gas circuit.
7. preventer according to claim 6, it is characterised in that described preventer also includes:
Second computing unit, for described first computing unit N continuous time calculated described pressure differential being averaged, obtains average differential pressure, and wherein, N is preset value and more than or equal to 2；
Described comparing unit specifically for: using described average differential pressure as detected value with preset threshold pressure difference compare.
8. preventer according to claim 6, it is characterized in that, described non-invasive blood pressure is measured system and is included following four kinds of states: holding state, measure inflated condition, measure in deflation status and be measured deflation status, described four kinds of states are corresponding four threshold pressure difference respectively；
Described comparing unit also includes:
Determine unit, be used for determining that presently described non-invasive blood pressure measures system state in which；
Acquiring unit, measures, with the presently described described non-invasive blood pressure determining that unit is determined, the threshold pressure difference that system state in which is corresponding for obtaining；
Sub-comparing unit, for comparing described pressure differential with the current described threshold pressure difference obtained as detected value.
9. the preventer according to any one of claim 6 to 8, it is characterized in that, described control unit specifically for: when described comparing unit compares described detected value more than described threshold pressure difference, close described non-invasive blood pressure and measure the air pump of system, and open measurement valve and/or the relief valve of described non-invasive blood pressure measurement system.
10. the preventer according to any one of claim 6 to 8, it is characterised in that described preventer also includes:
Alarm output unit, is used for when described comparing unit compares described detected value more than described threshold pressure difference, output abnormality alarm signal.
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| CN105708433B (en) | 2018-10-09 |
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