CN105999490A - Method for adjusting pressure of draught fan of respirator - Google Patents
Method for adjusting pressure of draught fan of respirator Download PDFInfo
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- CN105999490A CN105999490A CN201610443638.1A CN201610443638A CN105999490A CN 105999490 A CN105999490 A CN 105999490A CN 201610443638 A CN201610443638 A CN 201610443638A CN 105999490 A CN105999490 A CN 105999490A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3368—Temperature
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2230/00—Measuring parameters of the user
- A61M2230/40—Respiratory characteristics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2230/00—Measuring parameters of the user
- A61M2230/40—Respiratory characteristics
- A61M2230/42—Rate
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention provides a method for adjusting the pressure of a draught fan of a respirator. The output pressure of the respirator is adjusted by controlling the rotating speed of the draught fan. The method specifically includes the steps that during inhalation, the rotating speed of the draught fan is accelerated to be increased, and the output pressure of the respirator is rapidly increased to IPAP from EPAP; during exhalation, the rotating speed of the draught fan is accelerated to be decreased, and the output pressure of the respirator is rapidly reduced to EPAP from IPAP. Thus, the rotating speed of the draught fan is accelerated to be adjusted, and therefore the output pressure of the respirator can be rapidly increased to IPAP from EPAP or reduced to EPAP from IPAP within the preset time. The preset time can be set to be 0.1 S to 2 S according to user requirements, a user breathes more smoothly, and the use comfort for the user is improved.
Description
Technical field
The present invention relates to field of medical technology, particularly to a kind of respirator blower pressure control method.
Background technology
In current clinical medicine, respirator is as the effective means of an energy artificial substituting expiratory positive airway pressure function, the most general
All over for the respiratory failure caused by a variety of causes, the management of the anesthesia respiration during major operation, Breathing Suppotion treatment and emergency resuscitation
In, in Modern Medical Field, occupy highly important position.Respirator is that one can play prevention and treatment respiratory failure,
Reduce complication, save and extend the vital armarium of patients ' lives.
Respirator is a kind of for the purpose of the air of output certain pressure or flow velocity, assisted respiartion functional defect or because of spy
Different situation cannot the medical apparatus and instruments of patient respiratory of autonomous respiration.Turbofan with motor as power be respirator be main portion
Part, therefore electric machine control system is one of the most key system of whole respirator system.Owing to respirator volume is more and more less,
Needing to save space, home-use noninvasive ventilator, on the premise of keeping base therapy function, needs to cut subelement
Subtract, and electromagnetic valve takes up room greatly, be the most usually cut in.
But, after removing electromagnetic valve, noninvasive ventilator remains a need for the pressure support ventilation of double level, over the course for the treatment of
Need nonetheless remain for ceaselessly change pressure, this change just can only be completed by the change of motor speed.Do not stop owing to blower fan is in
Run up, wanted the change of pressure, be necessary for the action overcoming the inertia of self to complete acceleration or deceleration.Therefore
The pressure change of blower fan will not as electromagnetic valve quickly and accurately.How to regulate and control the rotation speed of fan of respirator so that respirator
The pressure of output adjusts rapidly i.e. accurately the most again, is those skilled in the art's problems of needing solution badly.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of respirator blower pressure control method, can be quickly and accurately
The output pressure of respirator is adjusted to desired value so that the breathing of user is more smooth and easy, improves the comfort of user.
The solution of the present invention is achieved in that a kind of respirator blower pressure control method, and it is by controlling wind
The rotating speed of machine regulates the output pressure of respirator, when being specifically included in air-breathing, accelerates to improve the rotating speed of blower fan, makes respirator defeated
Go out pressure and be climbed to IPAP from EPAP；When exhaling, accelerate to reduce the rotating speed of blower fan, make respirator output pressure from IPAP
It is quickly reduced to EPAP.So, by accelerating the rotating speed of regulation blower fan, can be in Preset Time, by respirator output pressure
It is climbed to IPAP from EPAP or is quickly reduced to EPAP from IPAP.Wherein, Preset Time can according to user's request, if
It is scheduled in 0.1S-2S so that the breathing of user is more smooth and easy, improves the comfort of user.
Another technical scheme of the present invention is on above-mentioned basis, when air-breathing, accelerates the rotating speed of raising blower fan
Process, particularly as follows: assume a length of t when currently carrying out pressure controlled, carry out pressure controlled total duration T, gathers respirator wind
The initial rotating speed v0 of machine and respirator current output pressure value P, it is right current output pressure value P and goal pressure IPAP to be carried out
Ratio, construct an acceleration function a=f (P, t) so that in remaining acceleration time Δ t=T-t, respirator output pressure
Just reach goal pressure IPAP, then rotation speed of fan is: v=v0+ ∫ a (P, t) dt.
Another technical scheme of the present invention is on above-mentioned basis, described acceleration function particularly as follows:Wherein coefficient k is conversion factor,
V (t) represents current rotating speed, and p (t) represents current pressure.
Another technical scheme of the present invention is on above-mentioned basis, and the EPAP of described respirator is dynamic regulated value,
Concrete control method comprises the following steps:
Step S01, gathers breath signal when user breathes, and gathers user in preset time period by harvester
Breath signal；
Step S02, extracts and breathes index feature signal, extracts the breathing index feature letter of user from described breath signal
Number；
Step S03, adjusts the EPAP of respirator, increases the test degree of the EPAP of respirator with pre-set velocity；
Step S04, gathers the user's breath signal after adjusting, and extracts the breathing index feature signal after adjustment；
Step S05, it is judged that whether the breathing index feature after adjustment deteriorates, the breathing index after adjusting in step S04
Characteristic signal is analyzed with breathing index feature signal in step S02, if described breathing index feature is without deterioration,
Then jump to step S03；If deterioration occurs in described breathing index feature, then stop increasing the test journey of the EPAP of respirator
Degree.So, by gathering breath signal when user breathes in preset time period, and breathing index feature signal is therefrom extracted
After, the breathing then after automatically adjust the EPAP of respirator by preset value, before breathing index feature signal and adjusting after adjusting
Index feature signal contrasts, if without deterioration, adjusts the EPAP of respirator the most further, and refers to the breathing after adjusting
Mark characteristic signal is monitored again, forms circulation；If occurring deteriorating, then stop increasing the test degree of the EPAP of respirator, anti-
Only there is inadaptable sense in user, and respirator EPAP now is the desired value that user now needs.Therefore, described respirator
The EPAP of respirator can be adjusted to desired value by EPAP control method automatically so that the expiration of user is more smooth and easy, improves user
Comfort.
Another technical scheme of the present invention is on above-mentioned basis, in described step S05, if described breathing index
When deterioration occurs in feature, also the EPAP pressure test degree of respirator is gone back up to a upper adjusted value.
Another technical scheme of the present invention is on above-mentioned basis, in described step S05, if described breathing index
When deterioration occurs in feature, quickly go up a preset value by the EPAP pressure test degree of respirator.
Another technical scheme of the present invention is on above-mentioned basis, in described step S05, if described breathing index
There is deterioration in feature, after stopping adjusting by the EPAP pressure of respirator, jumps to step S01.
Another technical scheme of the present invention is on above-mentioned basis, and in described step S01, described breath signal includes
Flow signal, pressure signal and/or respiratory frequency when user breathes.
Another technical scheme of the present invention is that, on above-mentioned basis, described harvester includes flow transducer, pressure
Force transducer and/or temperature sensor.
Another technical scheme of the present invention is on above-mentioned basis, after described step S01, before step S02,
Also include breath signal filter step, by wave filter and filtering algorithm, described breath signal is carried out noise reduction, filtering.
Another technical scheme of the present invention is on above-mentioned basis, in described step S02, extracts and breathes index spy
Reference number includes in tidal volume, respiratory frequency, air-breathing expiratory duration ratio, air-breathing maximum peak flow velocity, expiration lowest speed at least
A kind of.
Another technical scheme of the present invention is on above-mentioned basis, also includes to breathe index in described step S02
Characteristic signal linear fit, will carry out linear fit by each of extraction breathing index feature signal in preset time period,
A matched curve of index feature signal is breathed to this kind.
Another technical scheme of the present invention is on above-mentioned basis, in described step S05, when at least one adjusts
After breathe index feature signal negative sense deviate this kind breathe index feature signal matched curve time, then judge adjust after exhaling
Inhale index feature to occur deteriorating.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.
Fig. 1 is the blower pressure control method representing the respirator involved by a kind of embodiment of this patent when air-breathing
Flow chart；
Fig. 2 to Fig. 5 is the flow chart of the control method representing the respirator EPAP involved by this patent several embodiments；
Fig. 6 carries out the pressure schematic diagram of pressure test regulation when being and exhale；
Fig. 7 is the flow waveform figure of respiration；
Fig. 8 is the matched curve figure of air-breathing maximum peak flow velocity in a period of time.
Detailed description of the invention
Describing the present invention below in conjunction with the accompanying drawings, the description of this part is only exemplary and explanatory, should not
Protection scope of the present invention is had any restriction effect.Additionally, those skilled in the art are according to the description of presents, can be right
In presents, the feature in embodiment and in different embodiment carries out respective combination.
The embodiment of the present invention is as follows, a kind of respirator blower pressure control method, and it is adjusted by controlling the rotating speed of blower fan
The output pressure of joint respirator, when being specifically included in air-breathing, accelerates to improve the rotating speed of blower fan, makes respirator output pressure from EPAP
It is climbed to IPAP；When exhaling, accelerate to reduce the rotating speed of blower fan, make respirator output pressure be quickly reduced to from IPAP
EPAP.So, by accelerating the rotating speed of regulation blower fan, can be quick from EPAP by respirator output pressure in Preset Time
Rise to IPAP or be quickly reduced to EPAP from IPAP.Wherein, Preset Time can be set in 0.1S-according to user's request
In 2S so that the breathing of user is more smooth and easy, improve the comfort of user.
On the basis of above-described embodiment, in another embodiment of the present invention, as it is shown in figure 1, when air-breathing, accelerate to improve wind
The process of the rotating speed of machine, particularly as follows: a length of t when assuming currently to carry out pressure controlled, carry out pressure controlled total duration T, is adopted
The initial rotating speed v0 of collection respirator blower fan and respirator current output pressure value P, by current output pressure value P and goal pressure
IPAP contrasts, and (P t) so that in remaining acceleration time Δ t=T-t, breathes to construct an acceleration function a=f
Machine output pressure reaches goal pressure IPAP just, then rotation speed of fan is: v=v0+ ∫ a (P, t) dt.
On the basis of above-described embodiment, in another embodiment of the present invention, described acceleration function particularly as follows:Wherein coefficient k is conversion factor,
V (t) represents current rotating speed, and p (t) represents current pressure.
On the basis of above-described embodiment, in another embodiment of the present invention, as in figure 2 it is shown, the EPAP of described respirator is
Dynamically regulated value, concrete control method comprises the following steps:
Step S01, gathers breath signal when user breathes, and gathers user in preset time period by harvester
Breath signal；
Step S02, extracts and breathes index feature signal, extracts the breathing index feature letter of user from described breath signal
Number；
Step S03, adjusts the EPAP of respirator, increases the test degree of the EPAP of respirator with pre-set velocity,
Step S04, gathers the user's breath signal after adjusting, and extracts the breathing index feature signal after adjustment；
Step S05, it is judged that whether the breathing index feature after adjustment deteriorates, the breathing index after adjusting in step S04
Characteristic signal is analyzed with breathing index feature signal in step S02, if described breathing index feature is without deterioration,
Then jump to step S03；If deterioration occurs in described breathing index feature, then stop increasing the test journey of the EPAP of respirator
Degree.
During use, user has worn face shield as requested and has connected respirator, and user opens treatment.Wherein, preset
Time period can set as required, such as 5 minutes, 10 minutes, 15 minutes, 30 minutes etc. can, when as a rule presetting
Between section from 1 minute to a few hours can, as long as disclosure satisfy that follow-up determination requirement.Respirator is at work Preset Time
After Duan, start to carry out the test of pressure, as shown in Figure 6, user exhales when, pressure originally user exhales when
Being to drop to EPAP, but pressure is now dropped to below EPAP by respirator, then go back up to EPAP, beneficially user's expiration is suitable
Freely with raising comfort level.Shown in Fig. 6 be only signal effect state for convenience, pressure test is regarded as one straight
Line, but actual be frequently not when implement straight, but the class parabolic curve of an opening upwards.Use user
This preset time period in, it is possible to use the harvesters such as flow transducer, pressure transducer and/or temperature sensor, gather
Breath signal when user breathes, this breath signal can include flow signal when user breathes, pressure signal and/or breathing
Frequencies etc., can be used to judge that the breath signal whether user's breathing state deteriorates can.When concrete collection user breathes
Breath signal method, at disclosed patent CN 105457135A, respirator pressure method of adjustment, device and respirator, CN
103736184A, a kind of domestic breathing machine flow sensor error correction, CN 104750129A, the ventilation flow rate of respirator
The document such as control system and control method is all described, does not repeats them here.
In the present embodiment, illustrate as a example by flow signal during to use flow transducer collection user to breathe, due to
Sensor acquisition to numerical value (the usually white Gaussian noise interference) that be typically there is noise jamming, therefore flow waveform presents
Going out jagged interference, subsequent extracted can be breathed the steps such as index feature signal and be produced bigger shadow by the existence of these interference
Ring, it is therefore desirable to flow waveform is filtered, interference is minimized.In the present embodiment, use bank of filters algorithm
With AR model algorithm, these algorithms are the common algorithms in filtering field, but other similar filtering algorithms should
In the present invention.Those skilled in the art should understand that the calculating process of these algorithms, within the rule go out these algorithms
Detailed process, after filtering, flow curve presents smooth ideal state.
As it is shown in fig. 7, be the flow waveform figure of user's respiration.Carry out breathing index feature signal for this waveform to carry
Take and computational analysis, according to the flow waveform of respiration, breathing index feature signal in need can be calculated, described
Breathe index feature signal and include tidal volume, respiratory frequency, air-breathing expiratory duration ratio, air-breathing maximum peak flow velocity, expiration lowest stream
At least one in speed.Wherein, cycle starting point is shown to be the air-breathing starting point of respiration, and cycle terminal is shown to be respiration
Expiration end point, the time between these 2 is exactly total duration T0 of respiration, frequency computing formula can draw 1 point
Respiratory frequency in clock is about: f=60/T0.Cycle midpoint is the timing node that air-breathing terminates to turn to expiration, is to inhale before this
Gas duration, is expiration duration after this: inspiration time=cycle midpoint-cycle starting point, expiration duration=cycle terminal-cycle
Midpoint, thus can release air-breathing expiratory duration ratio is: inspiration time: expiration duration.Tidal volume calculating is flow curve and exhales
The integration in gas stage, does not derives to it at this.Those skilled in the art should understand that these breathe index feature letter
Number extraction and analyze process, do not repeat them here.
In the present embodiment, illustrating as a example by air-breathing maximum peak flow velocity, other breathe index feature signals and air-breathing
The calculating process of big peak flow velocity is similar to, and tires out the most one by one at this and states.As a example by the preset time period of 15 minutes, by detection in this section
The respiratory flow of user in time, extracts all of air-breathing maximum peak flow speed value, with every 6 breathing cycles be one group (the most also
Can calculate with the breathing cycle of other quantity, 6 breathing cycles here are not logarithm quantitative limitations), calculate these 6
The meansigma methods of the air-breathing maximum peak flow speed characteristic data in cycle: avgF=(F1+F2+F3+F4+F5+F6)/6, with 15 minutes be
Whole average peak flow velocitys that 15 minutes interior are put together, line linearity matching of going forward side by side, obtain a matched curve, be use by boundary
Family is at the trend curve of the air-breathing maximum peak flow velocity of this period of time, as shown in Figure 8.
After 15 min, respirator starts to be gradually increased the test degree of the EPAP of respirator with pre-set velocity, specifically
The speed increased can be steady state value: 0.5cmH2O/min, it is also possible to is that other any form of are pushed the speed, as long as gradually
Transition user will cause bigger sense of discomfort push the speed.As: first accelerate to increase the test of the EPAP of respirator
Degree, after gradually slow down the test degree of EPAP increasing respirator, or with linear function, quadratic function, cubic function or
The rules such as exponential function are gradually increased the test degree of the EPAP of respirator.
Then, then gather the user's breath signal after adjusting, and extract the breathing index feature signal after adjustment, and judge
Whether the breathing index feature after adjustment deteriorates, if described breathing index feature is without deterioration, then jumps to step S03, enters
One step is gradually increased the test degree of the EPAP of respirator with pre-set velocity；If the breathing index feature after at least one adjusts
When signal negative sense deviates the matched curve that this kind breathes index feature signal, then judge that disliking occurs in the breathing index feature after adjusting
Change situation, then stop increasing the test degree of the EPAP of respirator.Certainly, in order to improve the accuracy of judgement, it is also possible to set
When the index feature signal of breathing having two or three or more than four kind occurs that negative sense deviates this kind and breathes index feature signal
During matched curve, then judge that deterioration occurs in the breathing index feature after adjusting, is not described in detail at this.
So, by gathering breath signal when user breathes in preset time period, and it is special therefrom to extract breathing index
After reference number, then after automatically adjust the EPAP of respirator by preset value, the breathing index feature signal after adjusting with adjust before
Breathing index feature signal contrast, if without deterioration, adjust the EPAP of respirator the most further, and to adjusting after
Breathe index feature signal to be monitored again, form circulation；If occurring deteriorating, then stop increasing the test journey of the EPAP of respirator
Degree, prevents user from inadaptable sense occur, and respirator EPAP now is the desired value that user now needs.Therefore, exhale described in
The EPAP of respirator can be adjusted to desired value by suction machine EPAP control method automatically so that the expiration of user is more smooth and easy, improves
The comfort of user.
On the basis of above-described embodiment, in another embodiment of the present invention, as it is shown on figure 3, in described step S05, if
When deterioration occurs in described breathing index feature, also the EPAP pressure test degree of respirator is gone back up to a upper adjustment
Value.So can reduce the sense of discomfort of user further so that the expiration of user is more smooth and easy.
Another technical scheme of the present invention is on above-mentioned basis, as shown in Figure 4, in described step S05, if institute
Stating breathing index feature when there is deterioration, quickly go up a preset value by the EPAP pressure test degree of respirator.Should
Preset value can be a fixed value, such as 0.5cmH2O, 1cmH2O or regulate the speed into certain relation with default in step S03
Value, the most proportional etc..So can reduce the sense of discomfort of user further so that the expiration of user is more smooth and easy.
Another technical scheme of the present invention is on above-mentioned basis, as it is shown in figure 5, in described step S05, if institute
State breathing index feature and deterioration occurs, after stopping adjusting by the EPAP pressure of respirator, jump to step S01.So, may be used
With the EPAP pressure test degree that holding is current, Resurvey user breath signal in preset time period, carry out breathing and refer to
Mark feature signal extraction, obtains new matched curve etc., carries out other steps successively, forms circulation.So can solve to use
Family is in the different use ages, and the EPAP pressure size adapted to most is likely to different situations, thus by the tune of above-mentioned circulation
Adjusting method so that what the EPAP pressure of respirator was in user all the time is best suitable for size, carries out parameter from without user
Setting and the behavior to respirator adapt to, and respirator can adapt to various user automatically, prop up providing enough pressure
On the premise of holding, moreover it is possible to farthest give users'comfort.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a respirator blower pressure control method, it is characterised in that regulate respirator by controlling the rotating speed of blower fan
Output pressure, when being specifically included in air-breathing, accelerates to improve the rotating speed of blower fan, makes respirator output pressure be climbed to from EPAP
IPAP；When exhaling, accelerate to reduce the rotating speed of blower fan, make respirator output pressure be quickly reduced to EPAP from IPAP.
Respirator blower pressure control method the most according to claim 1, it is characterised in that when air-breathing, accelerates to improve
The process of the rotating speed of blower fan particularly as follows:
A length of t when assuming currently to carry out pressure controlled, carry out pressure controlled total duration T, gather the initial of respirator blower fan
Rotating speed v0 and respirator current output pressure value P, contrast current output pressure value P and goal pressure IPAP, constructs one
Individual acceleration function a=f (P, t) so that in remaining acceleration time Δ t=T-t, respirator output pressure reaches mesh just
Mark pressure IPAP, then rotation speed of fan is: v=v0+ ∫ a (P, t) dt.
Respirator blower pressure control method the most according to claim 2, it is characterised in that described acceleration function is concrete
For:Wherein coefficient k is conversion factor,
V (t) represents current rotating speed, and p (t) represents current pressure.
Respirator blower pressure control method the most according to any one of claim 1 to 3, it is characterised in that described in exhale
The EPAP of suction machine is dynamic regulated value, and concrete control method comprises the following steps:
Step S01, gathers breath signal when user breathes, gathers user's breathing in preset time period by harvester
Signal；
Step S02, extracts and breathes index feature signal, extract the breathing index feature signal of user from described breath signal；
Step S03, adjusts the EPAP of respirator, increases the test degree of the EPAP of respirator with pre-set velocity；
Step S04, gathers the user's breath signal after adjusting, and extracts the breathing index feature signal after adjustment；
Step S05, it is judged that whether the breathing index feature after adjustment deteriorates, the breathing index feature after adjusting in step S04
Signal is analyzed with breathing index feature signal in step S02, if described breathing index feature is without deterioration, then jumps
Forward step S03 to；If deterioration occurs in described breathing index feature, then stop increasing the test degree of the EPAP of respirator.
Respirator blower pressure control method the most according to claim 4, it is characterised in that in described step S05, if
When deterioration occurs in described breathing index feature, also the EPAP pressure test degree of respirator is gone back up to a upper adjustment
Value；Or quickly go up a preset value by the EPAP pressure test degree of respirator.
Respirator blower pressure control method the most according to claim 4, it is characterised in that in described step S05, if
There is deterioration in described breathing index feature, after stopping adjusting by the EPAP pressure of respirator, jumps to step S01.
Respirator blower pressure control method the most according to claim 4, it is characterised in that in described step S01, described
Breath signal includes flow signal when user breathes, pressure signal and/or respiratory frequency；Or, described harvester includes
Flow transducer, pressure transducer and/or temperature sensor.
Respirator blower pressure control method the most according to claim 4, it is characterised in that in described step S02, carry
Take breathing index feature signal include tidal volume, respiratory frequency, air-breathing expiratory duration ratio, air-breathing maximum peak flow velocity, exhale minimum
At least one in flow velocity.
Respirator blower pressure control method the most according to claim 8, it is characterised in that also wrap in described step S02
Include breathing index feature linearly matching, will carry out by each of extraction breathing index feature signal in preset time period
Linear fit, obtains this kind and breathes a matched curve of index feature signal.
Respirator blower pressure control method the most according to claim 9, it is characterised in that in described step S05,
When the breathing index feature signal negative sense after at least one adjusts deviates the matched curve that this kind breathes index feature signal,
Then judge that deteriorating occurs in the breathing index feature after adjusting.
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