CN102579025A - Pressure protection method and pressure protection apparatus used in non-invasive blood pressure measurement process - Google Patents
Pressure protection method and pressure protection apparatus used in non-invasive blood pressure measurement process Download PDFInfo
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- CN102579025A CN102579025A CN2011104359791A CN201110435979A CN102579025A CN 102579025 A CN102579025 A CN 102579025A CN 2011104359791 A CN2011104359791 A CN 2011104359791A CN 201110435979 A CN201110435979 A CN 201110435979A CN 102579025 A CN102579025 A CN 102579025A
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Abstract
The invention belongs to the field of biomedical signal processing, and particularly relates to a pressure protection method and a pressure protection apparatus used in the non-invasive blood pressure measurement process. Energy value of pressure generated in a cuff serves as a reference for pressure protection so that different types of patients can be protected. By the pressure protection method, measurement effectiveness of the non-invasive blood measurement device can be improved effectively, and harm to patients due to energy variation caused by pressure difference can be considered. The pressure protection method has the advantages of higher flexibility and more effective protection and higher safety in measurement.
Description
Technical field
The invention belongs to the processing of biomedical signals field, the pressure protect method and the device that adopt in a kind of specifically non-invasive blood pressure signal measurement process
Background technology
The measurement overwhelming majority of
non-invasive blood pressure has adopted succusion.This method needs with cuff interruption artery blood flow also as traditional " Ke Shi sound method ".But in deflation course, not to detect the Ke Shi sound, but detect the wave of oscillation signal of gas in the sleeve through pressure transducer.These waves of oscillation originate from the vibration of arterial blood tube wall.This wave of oscillation signal and arterial wall systolic pressure, diastolic pressure, mean pressure all have certain functional relation.Through wave of oscillation signal being amplified, after the filtering, envelope is detected, the certain criterion of reuse is judged the time corresponding relation of envelope and systolic pressure, diastolic pressure.
The simple principle introduction that pressure signal is measured and overvoltage protection is realized in the prior art is introduced in order better to set forth the present invention in
at present.Shown in Figure of description 1, the measuring device of this existing non-invasive blood pressure signal comprises blood pressure measurement module (10), blood pressure gas circuit and cuff (11), host computer (12).
Wherein: described blood pressure measurement module (10) comprising: pump valve control circuit (101), safety protective circuit (102), main measuring circuit (103);
Described pump valve control circuit (101) comprising: pump control circuit, measure valve controling circuit, relief valve control circuit, these 3 circuit are accepted master microprocessor circuit (1032) and from the control signal of microcontroller circuit (1022), are carried out on-off control;
Described safety protective circuit (102) comprising: from pressure sensor circuit (1021), from microcontroller circuit (1022); From the pressure signal of pressure sensor circuit (1021) collection cuff (11), input is from microcontroller circuit (1022);
are described to be comprised from microcontroller circuit (1022): parts such as microprocessor, analog-digital converter, memorizer; The control signal that can produce pump valve is carried out safeguard protection; Realization is to signals sampling in the cuff (11), and can monitor the power supply signal of pump, relief valve, measurement valve.
are described has realized the auxiliary security defencive function from microcontroller circuit (1022), comprises the function of pressure protect; The function of monitoring Measuring Time; The duty of monitoring master microprocessor etc.
described main measuring circuit (103) comprising: primary pressure sensor circuit (1031), master microprocessor electrical equipment (1032); Primary pressure sensor circuit (1031) is gathered the pressure signal of cuff (11), and it is inputed to master microprocessor circuit (1032).
described master microprocessor circuit (1032) comprises parts such as microprocessor, analog-digital converter, memorizer; The control signal that produces pump valve is controlled whole measuring process; And realize signals sampling in the cuff (11); According to sampled result, calculate the intermediate treatment data.
described master microprocessor circuit (1032) also comprises safety protection function, as comprises the function of pressure protect; The function of monitoring Measuring Time; Monitoring is from duty of microprocessor etc.
described host computer (12) is a relatively independent processing system, and host computer (12) transmission information is given blood pressure measurement module (10), and handles the information that blood pressure measurement module (10) is sent.Host computer (12) is realized carrying out communication with master microprocessor (1032) and any one or two from microprocessor communication (1022).
thus non-invasive blood pressure measure through giving cuff pressurization interruption artery blood flow automatically, if the control of the pressure in the cuff is improper, can bring harm, so need introducing pressure protect method to human body.
have multiple pressure protect method in practical application, wherein commonly used is the method for software protection.This method has been optimized the inconvenience that the hardware protection method brings and the drift of pressure protect point.The method of software protection at present mainly contains two kinds, and a kind of is as long as pressure has reached the pressure protect point, the protection of exitting so immediately; Another kind is to protect through the method for software timing, after promptly pressure reaches pressure protect point, and the protection of exitting again after time-delay a period of time.Above-mentioned two kinds of methods can play the effect of protection; But first method is when measuring the higher patient of blood pressure, if due to illness people's motion or other interference causes the of short duration overpressure protection point of pressure; The non-invasive blood pressure device can be protected immediately, has reduced the effectiveness of measuring.The guard method of second kind of software timing does not consider that when cuff pressure is very high to the extent of injury that patient brings, the defective that this method produces is particularly outstanding under the neonate pattern
Summary of the invention
for overcoming above-mentioned defective, the object of the invention promptly is to adopt in a kind of non-invasive blood pressure signal measurement process reliable and safe pressure protect method and device.
The objective of the invention is to realize through following technical scheme:
The pressure protect method that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process has comprised,
Step 1, preset pressure signal value and preset energy value, and gather the cuff pressure signal;
Step 2 is carried out pretreatment to the cuff pressure signal that collects;
Step 3 judges that whether pretreated pressure signal value is greater than preset pressure signal value;
Step 4, if described pretreated pressure signal value is greater than preset pressure signal value, the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
Step 5 judges that whether the energy value that calculates is greater than preset energy value;
step 6 is if the said energy value that calculates, then carries out the pressure protect operation greater than preset energy value.
Further, also comprise before the described step 4,
The cuff pressure signal is continued to gather if described pretreated pressure signal value smaller or equal to preset pressure signal value, is then returned said step 1 in
.
further also comprise before the described step 6, if the said energy value that calculates then returns said step 1 smaller or equal to preset energy value, continue to gather the cuff pressure signal.
Further, described step 2 further comprises,
Step 21 deducts pressure null offset value with the cuff pressure value signal of gathering;
step 22 is carried out Filtering Processing with the difference of gained.
Further, said step 4 further comprises,
If described pretreated pressure signal value then judges whether to exceed Preset Time greater than preset pressure signal value,
If judge that not exceeding Preset Time sets the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
otherwise, then directly carry out pressure protect operation.
Further, described pressure protect is operating as the inflation of closing pump, opens valve and exits, and send warning message.
Further, the formula of the energy value of calculating pressure signal generation does in the step 4,
Wherein, Q is an energy value, and P is a force value, and V is a bulking value, and t is a time value, and n and k are natural number, and m is 0 and natural number,
Be parameter preset.
Further, the formula of the energy value of calculating pressure signal generation does in the described step 4,
Wherein, Q is an energy value,
Expression i is the increment of pressure P constantly,
Expression i is the increment of volume V constantly, and t is a time value, and n and k are natural number, and m is 0 and natural number,
Be parameter preset.
Further, the formula of the energy value of calculating pressure signal generation does in the described step 4,
Wherein, Q is an energy value,
Expression i pressure P constantly,
Expression i-1 pressure P constantly,
Expression i-1 pressure P constantly, t is a time value, and n, j, s and k are natural number, and m is 0 and natural number,
Be parameter preset.
The pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process mainly comprises:
The pressure signal acquisition module is used in scheduled duration, gathering the pressure signal in the cuff;
The pressure signal pre-processing module is connected with described pressure signal acquisition module, is used for the cuff pressure signal that collects is carried out pretreatment;
The pressure signal comparison module is connected with the pressure signal acquisition module with described pressure signal pre-processing module, is used to judge that whether pretreated pressure signal value is greater than preset pressure signal value;
The energy value computing module is connected with described pressure signal comparison module, is used for when described pretreated pressure signal value during greater than preset pressure signal value the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
The energy value comparison module is connected with the pressure signal acquisition module with described energy value computing module, is used to judge that whether the energy value that calculates is greater than preset energy value;
overvoltage protective module is connected with described energy value comparison module, is used for then carrying out the pressure protect operation when the said energy value that calculates during greater than preset energy value.
Further, the pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process has also comprised,
The Preset Time comparison module; Be connected with overvoltage protective module with described pressure signal comparison module, energy value computing module; Be used for when described pretreated pressure signal value during greater than preset pressure signal value; Judge whether to exceed Preset Time, then carry out the overvoltage protection operation if exceed Preset Time, if do not exceed the energy value that Preset Time then produces according to pretreated pressure signal value calculating pressure signal;
parameter presetting module is connected with described pressure signal comparison module, Preset Time comparison module, energy value comparison module, is used for the parameter of said each module is preestablished.
Further, described pressure signal pre-processing module comprised,
The pressure signal difference unit is used for the cuff pressure value signal of gathering is deducted pressure null offset value;
The difference signal filter unit is connected with described pressure signal difference unit, is used for the difference of gained is carried out Filtering Processing;
Described overvoltage protective module comprised,
The pump valve control unit is used to close the inflation of pump, opens valve and exits;
alarm unit is used for output alarm information.
the present invention has adopted the reference as pressure protect of energy value that pressure produces in cuff, dissimilar patients is protected.This method not only can improve the measurement effectiveness of Woundless blood pressure measuring device, and the energy variation that causes in the time of can also be from different pressure considers the harm size that patient causes, and it is higher to have a motility, protect more effective, safer characteristics in measuring process.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing
.
Fig. 1 is existing non-invasive blood pressure Signal Measurement System device sketch map;
The sketch map of the energy loss that Fig. 2 causes for pressure;
Fig. 3 is an embodiment flow chart of the pressure protect method that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process;
Fig. 4 is another embodiment flow chart of the pressure protect method that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process;
Fig. 5 is an embodiment flow chart of the pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process;
Fig. 6 is another embodiment flow chart of the pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process.
The specific embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Can know according to thermodynamic (al) isothermal process, when pressure increases, produce the externally acting of expanding.And the corresponding relation of merit and time promptly is an energy.Externally do identical merit, lasting asynchronism(-nization), the energy that is then produced is different.The externally acting of expanding shows as the cuff inflation and can push patient in the measurement of non-invasive blood pressure, pressure is big more, and externally more promptly to push patient serious more in acting, and the time is long more, and the energy that is produced is big more, and the injury that accordingly patient is caused is just big more.
For this phenomenon of vivider explanation, be illustrated below, as shown in Figure 2.Among the figure, when pressure P 1 expression pressure is relatively low, when pressure P 2 expression pressure are higher.Carry out pressure protect when the method for using software delay, keep the AC time 1 time in pressure P, its energy range is ACDE; Keep the AC time 2 times in pressure P, the energy area of its generation is ACFH; Pressure P 2 specific pressure P1 fecund is given birth to energy E DFH, and the energy that fecund is given birth to can cause irreversible injury to patient, especially under the highly compressed situation of neonate pattern.
When using ENERGY METHOD to carry out pressure protect, after the energy of pressure generation reaches certain value, protect immediately.Like the energy area ABGH among Fig. 2, the energy of its generation is littler than the energy value ACFH that uses the software delay method to obtain, and is also little to the extent of injury that patient caused, and therefore can more effective patient be protected.
The present invention proposes pressure energy-producing thought in cuff, protects.Cardinal principle is: in normal the measurement, and timing sampling cuff pressure signal, and calculating pressure energy; The minimum pressure energy value that the energy value that calculates and each patient's type are presetted relatively; Demarcate minimum energy value if the pressure energy value that calculates surpasses, send control signal and close the pump inflation, open valve venting protection.An embodiment flow chart of the pressure protect method that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process, as shown in Figure 3, concrete steps are following:
301. gather the cuff pressure signal;
In scheduled duration, gather pressure signal, preset pressure signal value and preset energy value in the cuff.
302. the cuff pressure signal to collecting carries out pretreatment;
The preferred pretreatment mode of present embodiment is:
The cuff pressure signal that will in step 301, collect and zero point Zero_AD do difference, promptly deduct the zero migration value that pick off causes because of variations in temperature.Cuff pressure signal after then difference being handled carries out Filtering Processing.Like processing such as smothing filtering, LPFs.
Zero point, Zero_AD referred to: when powering on, open valve at every turn, close pump; Cuff is communicated with atmospheric pressure, and the force value that obtains in cuff this moment is Zero_AD at zero point, accomplishes once school zero this moment; Later at valve open; Pump cuts out under the situation, lets pressure in blood pressure gas circuit and the cuff near atmospheric pressure, carries out cycle school zero.
303. judge that whether pretreated pressure signal value is greater than preset pressure signal value;
With the pretreated cuff pressure signal value of step 302 and corresponding preset different patient's types (as; Adult/children's/neonate) the pressure protect point value of setting down relatively; If pretreated cuff pressure signal value is greater than the pressure protect point value that presets; Then carry out step 304, otherwise get back to step 301, continue to gather the cuff pressure signal.
The general preferred needs of the setting of pressure protect point satisfy ANSI/AAMI SP10:2002 standard and IEC 80601-2-30 (Edition1.0 2009-01) standard.Such as, wherein stipulate among the standard IEC 80601-2-30 (Edition1.0 2009-01): during normal use, under the neonate pattern, the maximum pressure value of non-invasive blood pressure can not surpass 150mmHg; Under other patterns, the maximum pressure value of non-invasive blood pressure can not surpass 300mmHg.
304. if described pretreated pressure signal value is greater than preset pressure signal value, the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
Utilize the pretreated cuff pressure signal that obtains in the step 302, calculate the energy value that the cuff internal pressure produces.
The energy value computational methods of cuff pressure have a lot of in, according to energy, pressure and the functional relationship that exists between the time, calculate the pressure energy in the cuff.Energy Q, pressure P, volume V, the mapping relations formula between the time t is that (t), in practical application, this mapping relations formula has multiple expression way to Q=f, all can explain like expression formula (1), (2), (3) for P, V.
（1）
Wherein:
n=1,2...，m=0,1,2...，k=1,2...，j=1,2...，s=1,2...。
T representes to sample T constantly.
Satisfying under the situation of above-mentioned standard-required, can select to be fit to the pressure protect point value of own product according to the actual software and hardware signal processing situation of the product design of each producer.
305. judge that whether the energy value that calculates is greater than preset energy value;
The minimum energy value that presets under the cuff pressure energy value that calculates and the corresponding patient's type (adult/children's/neonate) is compared.If the energy value that calculates then gets into step 306 greater than the minimum energy value of demarcating, otherwise continue step 301.
Demarcate the setting of minimum energy value, when adding was pushed patient to cuff under the different pressures, factors such as the patient comfortableness of patient were considered.
306. if the said energy value that calculates, then carries out the pressure protect operation greater than preset energy value;
The pressure protect operation mainly is the inflation of closing pump, opens valve and exits, and send warning message.
Another embodiment flow chart of the pressure protect method that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process, as shown in Figure 4, concrete steps are following:
401. gather the cuff pressure signal;
In scheduled duration, gather pressure signal, preset pressure signal value and preset energy value in the cuff.
402. the cuff pressure value signal of gathering is deducted pressure null offset value;
The cuff pressure signal that will in step 401, collect and zero point Zero_AD do difference, promptly deduct the zero migration value that pick off causes because of variations in temperature.Zero point, Zero_AD referred to: when powering on, open valve at every turn, close pump; Cuff is communicated with atmospheric pressure, and the force value that obtains in cuff this moment is Zero_AD at zero point, accomplishes once school zero this moment; Later at valve open; Pump cuts out under the situation, lets pressure in blood pressure gas circuit and the cuff near atmospheric pressure, carries out cycle school zero.
403. the difference of gained is carried out Filtering Processing;
With in the step 402, the cuff pressure signal after difference is handled carries out Filtering Processing then.Like processing such as smothing filtering, LPFs.
Above-mentioned step 402 and step 403 are the detailed descriptions to the preprocessing process of step 302; Certainly also have other pretreated modes; For example: directly carry out pressure signal and remove the processing of zero migration value or directly carry out Filtering Processing, perhaps increase compensation deals of signal or the like.
404. judge that whether pretreated pressure signal value is greater than preset pressure signal value;
With pretreated cuff pressure signal value and corresponding preset different patient's types (as; Adult/children's/neonate) the pressure protect point value of setting down relatively; If pretreated cuff pressure signal value is greater than the pressure protect point value that presets; Then carry out step 405, otherwise get back to step 401, continue to gather the cuff pressure signal.
The general preferred needs of the setting of pressure protect point satisfy ANSI/AAMI SP10:2002 standard and IEC 80601-2-30 (Edition1.0 2009-01) standard.Such as, wherein stipulate among the standard IEC 80601-2-30 (Edition1.0 2009-01): during normal use, under the neonate pattern, the maximum pressure value of non-invasive blood pressure can not surpass 150mmHg; Under other patterns, the maximum pressure value of non-invasive blood pressure can not surpass 300mmHg.
405. if described pretreated pressure signal value then judges whether to exceed Preset Time greater than preset pressure signal value;
Behind the pressure protect point of pressure signal value greater than corresponding patient's type in the step 404; Step 405 judge greater than time of pressure protect point whether greater than time of setting; If exceeded the time of setting, then directly get into step 408 and carried out press operation, otherwise continue to get into step 406.
Setting-up time present embodiment in this step preferably satisfies ANSI/AAMI SP10:2002 standard and IEC 80601-2-30 (Edition1.0 2009-01) standard.For example, wherein among the standard IEC 80601-2-30 (Edition1.0 2009-01) the safety requirement has been proposed the pressure under the single failure condition:
A) pressure surpass time of maximum pressure+10% scope (being neonate 165mmHg, other types 330mmHg) can not be greater than 3 seconds;
B) pressure can not be above 15 seconds above the time of maximum pressure.
The setting value of time also can be selected and preset according to other standards or condition.
Such operation can better realize the effect of non-invasive blood pressure measurement safeguard protection.
406. if judge that not exceeding Preset Time sets the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
The energy value computational methods of cuff pressure have a lot of in, according to energy, pressure and the functional relationship that exists between the time, calculate the pressure energy in the cuff.Energy Q, pressure P, volume V, the mapping relations formula between the time t is that (t), in practical application, this mapping relations formula has multiple expression way to Q=f, all can explain like expression formula (1), (2), (3) for P, V.
Wherein:
n=1,2...，m=0,1,2...，k=1,2...，j=1,2...，s=1,2...。
expression i is the increment of pressure P constantly;
expression i is the increment of volume V constantly;
expression i pressure P constantly,
expression i-1 pressure P constantly.
T representes to sample T constantly.
Satisfying under the situation of above-mentioned standard-required, can select to be fit to the pressure protect point value of own product according to the actual software and hardware signal processing situation of the product design of each producer.
407. judge that whether the energy value that calculates is greater than preset energy value;
The minimum energy value that presets under the cuff pressure energy value that calculates and the corresponding patient's type (adult/children's/neonate) is compared.If the energy value that calculates then gets into step 408 greater than the minimum energy value of demarcating, otherwise continue step 401.
Demarcate the setting of minimum energy value, when adding was pushed patient to cuff under the different pressures, factors such as the patient comfortableness of patient were considered.
408. pressure protect operation;
If the said energy value that calculates is greater than preset energy value, when perhaps described step 405 is judged greater than time of pressure protect point greater than time of setting, close the inflation of pump, open valve and exit, and the transmission warning message.
An embodiment flow chart of the pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process, as shown in Figure 5, specifically describe as follows:
It has comprised:
Pressure signal acquisition module 501 is used in scheduled duration, gathering the pressure signal in the cuff;
Pressure signal pre-processing module 502 is connected with described pressure signal acquisition module 501, is used for the cuff pressure signal that collects is carried out pretreatment;
Pressure signal comparison module 503 is connected with pressure signal acquisition module 501 with described pressure signal pre-processing module 502, is used to judge that whether pretreated pressure signal value is greater than preset pressure signal value;
Energy value computing module 504 is connected with described pressure signal comparison module 503, is used for when described pretreated pressure signal value during greater than preset pressure signal value the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
Energy value comparison module 505 is connected with pressure signal acquisition module 501 with described energy value computing module 504, is used to judge that whether the energy value that calculates is greater than preset energy value;
Overvoltage protective module 506 is connected with described energy value comparison module 505, is used for then carrying out the pressure protect operation when the said energy value that calculates during greater than preset energy value;
Another embodiment flow chart of the pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process, as shown in Figure 6, specifically describe as follows:
Described pressure signal pre-processing module 502 comprised,
Pressure signal difference unit 507 is used for the cuff pressure value signal of gathering is deducted pressure null offset value;
Difference signal filter unit 508 is connected with described pressure signal difference unit 507, is used for the difference of gained is carried out Filtering Processing;
Described overvoltage protective module 506 comprised,
Pump valve control unit 511 is used to close the inflation of pump, opens valve and exits;
Alarm unit 512 is used for output alarm information;
The pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement of the present invention process has also comprised:
Preset Time comparison module 509; Be connected with overvoltage protective module 506 with described pressure signal comparison module 503, energy value computing module 504; Be used for when described pretreated pressure signal value during greater than preset pressure signal value; Judge whether to exceed Preset Time, then carry out the overvoltage protection operation if exceed Preset Time, if do not exceed the energy value that Preset Time then produces according to pretreated pressure signal value calculating pressure signal;
Parameter presetting module 510 is connected with described pressure signal comparison module 503, Preset Time comparison module 509, energy value comparison module 505, is used for the parameter of said each module is preestablished;
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention
Claims (12)
1. the pressure protect method that adopts in the non-invasive blood pressure signal measurement process is characterized in that, comprised,
Step 1, preset pressure signal value and preset energy value are gathered the cuff pressure signal;
Step 2 is carried out pretreatment to the cuff pressure signal that collects;
Step 3 judges that whether pretreated pressure signal value is greater than preset pressure signal value;
Step 4, if described pretreated pressure signal value is greater than preset pressure signal value, the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
Step 5 judges that whether the energy value that calculates is greater than preset energy value;
Step 6 is if the said energy value that calculates, then carries out the pressure protect operation greater than preset energy value.
2. the pressure protect method that adopts in a kind of non-invasive blood pressure signal measurement process according to claim 1 is characterized in that, also comprises before the described step 4,
If described pretreated pressure signal value is then returned said step 1 smaller or equal to preset pressure signal value, continue to gather the cuff pressure signal.
3. the pressure protect method that adopts in a kind of non-invasive blood pressure signal measurement process according to claim 1; It is characterized in that; Also comprise before the described step 6; If the said energy value that calculates then returns said step 1 smaller or equal to preset energy value, continue to gather the cuff pressure signal.
4. according to the pressure protect method that adopts in each described a kind of non-invasive blood pressure signal measurement process in the claim 1,2,3, it is characterized in that described step 2 further comprises,
Step 21 deducts pressure null offset value with the cuff pressure value signal of gathering;
Step 22 is carried out Filtering Processing with the difference of gained.
5. according to the pressure protect method that adopts in each described a kind of non-invasive blood pressure signal measurement process in the claim 1,2,3, it is characterized in that said step 4 also comprises,
If described pretreated pressure signal value then judges whether to exceed Preset Time greater than preset pressure signal value:
If judge that not exceeding Preset Time sets the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
Otherwise, then directly carry out the pressure protect operation.
6. according to the pressure protect method that adopts in each described a kind of non-invasive blood pressure signal measurement process in the claim 1,2,3, it is characterized in that, in the said step 6; Carrying out the pressure protect operation comprises; Close the inflation of pump, open valve and exit, and send warning message.
7. according to the pressure protect method that adopts in each described a kind of non-invasive blood pressure signal measurement process in the claim 1,2,3, it is characterized in that the formula of the energy value of calculating pressure signal generation does in the described step 4,
Wherein, Q is an energy value, and P is a force value, and V is a bulking value; T is a time value; N and k are natural number, and m is 0 and natural number, and
is parameter preset.
8. according to the pressure protect method that adopts in each described a kind of non-invasive blood pressure signal measurement process in the claim 1,2,3, it is characterized in that the formula of the energy value of calculating pressure signal generation does in the described step 4,
Wherein, Q is an energy value;
expression i is the increment of pressure P constantly;
expression i is the increment of volume V constantly; T is a time value; N and k are natural number; M is 0 and natural number, and
is parameter preset.
9. according to the pressure protect method that adopts in each described a kind of non-invasive blood pressure signal measurement process in the claim 1,2,3, it is characterized in that the formula of the energy value of calculating pressure signal generation does in the described step 4,
Wherein, Q is an energy value;
expression i pressure P constantly;
expression i-1 pressure P constantly;
expression i is the increment of volume V constantly; T is a time value; N, j, s and k are natural number; M is 0 and natural number, and
is parameter preset.
10. the pressure protective device that adopts in the non-invasive blood pressure signal measurement process is characterized in that, comprised,
The pressure signal acquisition module is used in scheduled duration, gathering the pressure signal in the cuff;
The pressure signal pre-processing module is connected with described pressure signal acquisition module, is used for the cuff pressure signal that collects is carried out pretreatment;
The pressure signal comparison module is connected with the pressure signal acquisition module with described pressure signal pre-processing module, is used to judge that whether pretreated pressure signal value is greater than preset pressure signal value;
The energy value computing module is connected with described pressure signal comparison module, is used for when described pretreated pressure signal value during greater than preset pressure signal value the energy value that then produces according to pretreated pressure signal value calculating pressure signal;
The energy value comparison module is connected with the pressure signal acquisition module with described energy value computing module, is used to judge that whether the energy value that calculates is greater than preset energy value;
Overvoltage protective module is connected with described energy value comparison module, is used for then carrying out the pressure protect operation when the said energy value that calculates during greater than preset energy value.
11. the pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement process according to claim 10 is characterized in that, also comprised,
The Preset Time comparison module; Be connected with overvoltage protective module with described pressure signal comparison module, energy value computing module; Be used for when described pretreated pressure signal value during greater than preset pressure signal value; Judge whether to exceed Preset Time, then carry out the overvoltage protection operation if exceed Preset Time, if do not exceed the energy value that Preset Time then produces according to pretreated pressure signal value calculating pressure signal;
The parameter presetting module is connected with described pressure signal comparison module, Preset Time comparison module, energy value comparison module, is used for the parameter of said each module is preestablished.
12. the pressure protective device that adopts in a kind of non-invasive blood pressure signal measurement process according to claim 10 is characterized in that,
Described pressure signal pre-processing module comprised,
The pressure signal difference unit is used for the cuff pressure value signal of gathering is deducted pressure null offset value;
The difference signal filter unit is connected with described pressure signal difference unit, is used for the difference of gained is carried out Filtering Processing;
Described overvoltage protective module comprised,
The pump valve control unit is used to close the inflation of pump, opens valve and exits;
Alarm unit is used for output alarm information.
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Cited By (5)
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| CN102772202A (en) * | 2012-07-27 | 2012-11-14 | 深圳市理邦精密仪器股份有限公司 | Safe detection system, safe detection method, non-invasive blood pressure measuring device and safe protection method |
| CN102824167A (en) * | 2012-09-07 | 2012-12-19 | 深圳市华智康电子有限公司 | Overpressure protection device for non-invasive sphygmomanometer and threshold setting method thereof |
| CN105708433A (en) * | 2016-01-20 | 2016-06-29 | 深圳市理邦精密仪器股份有限公司 | Protection method and device applied to non-invasive blood pressure measurement system |
| CN105852832A (en) * | 2016-04-13 | 2016-08-17 | 清华大学 | Blood pressure real-time measurement device and method for measuring mean blood pressure |
| CN107536605A (en) * | 2017-09-05 | 2018-01-05 | 广州视源电子科技股份有限公司 | A kind of pwm circuit dutyfactor adjusting method, controller and blood pressure measuring device |
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| CN101103908A (en) * | 2006-07-11 | 2008-01-16 | 深圳迈瑞生物医疗电子股份有限公司 | Woundless blood pressure measuring device and its safety protecting method |
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| CN2910110Y (en) * | 2006-01-25 | 2007-06-13 | 沈阳东软医疗系统有限公司 | Over-pressure protector of automatic sphyg momanometer |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772202A (en) * | 2012-07-27 | 2012-11-14 | 深圳市理邦精密仪器股份有限公司 | Safe detection system, safe detection method, non-invasive blood pressure measuring device and safe protection method |
| CN102772202B (en) * | 2012-07-27 | 2014-07-23 | 深圳市理邦精密仪器股份有限公司 | Safe detection system, safe detection method, non-invasive blood pressure measuring device and safe protection method |
| CN102824167A (en) * | 2012-09-07 | 2012-12-19 | 深圳市华智康电子有限公司 | Overpressure protection device for non-invasive sphygmomanometer and threshold setting method thereof |
| CN105708433A (en) * | 2016-01-20 | 2016-06-29 | 深圳市理邦精密仪器股份有限公司 | Protection method and device applied to non-invasive blood pressure measurement system |
| CN105708433B (en) * | 2016-01-20 | 2018-10-09 | 深圳市理邦精密仪器股份有限公司 | Means of defence and device applied to non-invasive blood pressure measuring system |
| CN105852832A (en) * | 2016-04-13 | 2016-08-17 | 清华大学 | Blood pressure real-time measurement device and method for measuring mean blood pressure |
| CN105852832B (en) * | 2016-04-13 | 2019-08-09 | 清华大学 | The measurement method of blood pressure real-time measurement apparatus and mean blood pressure |
| CN107536605A (en) * | 2017-09-05 | 2018-01-05 | 广州视源电子科技股份有限公司 | A kind of pwm circuit dutyfactor adjusting method, controller and blood pressure measuring device |
| CN107536605B (en) * | 2017-09-05 | 2020-05-05 | 广州视源电子科技股份有限公司 | PWM circuit duty ratio adjusting method, controller and blood pressure measuring device |
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