The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of method, device and the noninvasive ventilator of lung ventilator leak compensation,To solve the problem of lung ventilator can not compensate response in time when occurring gas leakage, so as to provide enough gas for userAmount, to meet the respiratory demand of user.
In order to solve the above technical problems, the embodiment of the present invention provides following technical scheme：
On the one hand the embodiment of the present invention provides a kind of method of lung ventilator leak compensation, including：
The first pressure sensor positioned at lung ventilator blower fan outlet side is obtained respectively, and positioned in the lung ventilator outletThe second pressure sensor at end, each pressure value in preset time period；
The pressure difference value of the first pressure sensor and the second pressure sensor in synchronization is calculated, and is unitedCount each number of the pressure difference value in the range of threshold pressure difference；
When the number of the pressure difference value meets preparatory condition, according to each pressure in the range of the threshold pressure differenceThe endpoint value of difference and the threshold pressure difference scope, obtains the output adjustment power of the blower fan；
The power output of the lung ventilator blower fan is adjusted according to the output adjustment power, until described defaultIn period, the number of the pressure difference value in the threshold pressure difference scope is unsatisfactory for the preparatory condition.
Optionally, it is described that bag is adjusted to the power output of the lung ventilator blower fan according to the output adjustment powerInclude：
When the power output of lung ventilator blower fan according to the output adjustment power ascension, and presently described lung ventilatorWhen the power output of blower fan reaches peak power output threshold value, judge whether the output adjustment power is not more than adjustment power-thresholdValue；
When judging that the output adjustment power is not more than the adjustment power threshold, continue to adjust the lung ventilator blower fanPower output until blower fan peak power output；When judging that the output adjustment power is more than the adjustment power threshold,Then the power output of the lung ventilator blower fan is adjusted to blower fan minimum output power.
Optionally, when the power output of lung ventilator blower fan according to the output adjustment power ascension, and current instituteWhen the power output for stating lung ventilator blower fan reaches the blower fan peak power output, it is described according to the output adjustment power to instituteState lung ventilator blower fan power output be adjusted including：
When the pressure value of the second pressure sensor can not meet user's request pressure value in preset time range, thenThe power output of the lung ventilator blower fan is adjusted to blower fan minimum output power.
Optionally, it is described and count each number of pressure difference value in the range of threshold pressure difference and be：
The pressure difference value is counted less than 8cmH2O number, or
The pressure difference value is counted more than 10cmH2O number.
Optionally, the number of the pressure difference value meets preparatory condition and is：
When the pressure difference value is less than 8cmH2The pressure value number got in O number, with the preset time periodRatio be not less than 10%, then judge that the number of the pressure difference value meets preparatory condition；
When the pressure difference value is more than 10cmH2The pressure value got in O number, with the preset time periodSeveral ratio is not less than 90%, then judges that the number of the pressure difference value meets preparatory condition.
Optionally, described each pressure difference value and the threshold pressure difference model according in the range of the threshold pressure differenceThe endpoint value enclosed, the output adjustment power for obtaining the lung ventilator blower fan is specifically included：
When the pressure difference value is less than 8cmH2When O number meets preparatory condition, calculate and be less than 8cmH2O pressure difference valueAverage value, by the 8cmH2The difference of O and the average value as the blower fan output adjustment power；
When the pressure difference value is more than 10cmH2When O number meets preparatory condition, calculate and be more than 10cmH2O pressure differentialThe average value of value, by the average value and the 10cmH2O difference as the blower fan output adjustment power.
Optionally, the peak power output threshold value is the 90% of the blower fan peak power output.
Optionally, the adjustment power threshold is 2cmH2O。
On the other hand the embodiment of the present invention provides a kind of device of lung ventilator leak compensation, including：
Pressure value module is obtained, for obtaining the first pressure sensor positioned at lung ventilator blower fan outlet side respectively, andPositioned at the second pressure sensor in the lung ventilator outlet side, each pressure value in preset time period；
Pressure difference value module is calculated, for calculating the first pressure sensor and the second pressure sensor sameThe pressure difference value at one moment, and count each number of the pressure difference value in the range of threshold pressure difference；
It is determined that adjustment power model, for when the number of the pressure difference value meets preparatory condition, according to the pressureThe endpoint value of each pressure difference value and the threshold pressure difference scope in poor threshold range, the output for obtaining the blower fan is adjustedWhole power；
Power of fan module is adjusted, for entering according to the output adjustment power to the power output of the lung ventilator blower fanRow adjustment, until in the preset time period, the number of the pressure difference value in the threshold pressure difference scope is unsatisfactory for instituteState preparatory condition.
The embodiment of the present invention additionally provides a kind of noninvasive ventilator, including pressure sensor, blower fan and as described aboveThe device of lung ventilator leak compensation.
It is same by counting in preset time period the embodiments of the invention provide a kind of method of lung ventilator leak compensationWhen inscribe number of the pressure difference value in threshold pressure difference scope of first pressure sensor and second pressure sensor, it is pre- when meetingIf during condition, then judging that current lung ventilator is in gas leakage state, then according to pressure difference value and the end of threshold pressure difference scopePoint value, obtains the output adjustment power of blower fan, and the power output to blower fan is adjusted, until in preset time period, being inThe number of the pressure difference value of threshold pressure difference scope is unsatisfactory for preparatory condition.
The advantage of technical scheme that the application is provided is, by obtain in real time at fan outlet pressure sensor withThe pressure difference value of the pressure sensor of lung ventilator complete machine gas outlet, timely judges whether current lung ventilator is in gas leakage state,So as to make leak compensation response in time, for the tolerance needed for user provides, the respiratory demand of user is met, breathing is improvedThe reliability and stability of machine, are conducive to improving the comfort level of respiratory disorder patient, are conducive to improving the treatment of respiratory disorderQuality.
In addition, the embodiment of the present invention is provided also directed to the method for lung ventilator leak compensation realizes device and one accordinglyNoninvasive ventilator is planted, further such that methods described has more practicality, described device and noninvasive ventilator have corresponding excellentPoint.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed descriptionThe present invention is described in further detail.Obviously, described embodiment is only a part of embodiment of the invention, rather thanWhole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premiseLower obtained every other embodiment, belongs to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " " in the description and claims of this application and above-mentioned accompanying drawingFour " etc. be for distinguishing different objects, rather than for describing specific order.In addition term " comprising " and " having " andTheir any deformations, it is intended that covering is non-exclusive to be included.For example contain the process of series of steps or unit, method,The step of system, product or equipment are not limited to list or unit, but the step of may include not list or unit.
The structural representation of noninvasive ventilator is referred to shown in Fig. 1, and blower fan 100 produces gas-pressurized, by a bit of pipeMagnetic valve is reached behind road, on this section of pipeline, has a sensor 101 for being used for detection pressure to be located at close to blower fan gas outletPosition, collection be blower fan pressurization after gas pressure.After valve, there is other one section of pipeline, on this section of pipeline, distributionFlow sensor 102 and another pressure sensor 103.Flow sensor 102 is located at the stage casing of this section of pipeline, and collection isGas flow after magnetic valve, pressure sensor 103 is located at the gas outlet of complete machine, and collection is after magnetic valve, to arriveUp to the pressure at gas outlet.
Present inventor has found by research, in the therapeutic process of lung ventilator, if there is pressure sensor 103Collection value be consistent with expected treatment pressure value, but the difference between pressure sensor 101 and pressure sensor 103 is too lowSituation, then be likely to result in the state that magnetic valve is substantially at maximum opening, now the gas in whole air flue is than sparse, therefore the relatively low situation of flow can be caused to occur, then occur that tidal volume is relatively low with specific reflection to patient, under blood oxygenThe situation of drop.
In order to provide maximum tolerance to patient under equal pressure, then need to lift the rotating speed of blower fan, allow pressure to passPressure at sensor 101 rises so that the pressure difference increase between sensor 101 and sensor 103, passes through magnetic valve accurate adjustmentPressure so that gas outlet pressure is constant, but flow rising.
In consideration of it, the application is by counting in preset time period (10s), under synchronization first pressure sensor 101 withThe pressure difference value of second pressure sensor 103 when meeting preparatory condition, then judges current in the number of threshold pressure difference scopeLung ventilator is in gas leakage state, then according to pressure difference value and the endpoint value of threshold pressure difference scope, obtains the defeated of blower fan 100Go out to adjust power, the power output to blower fan 100 is adjusted, until in preset time period, in threshold pressure difference scopeThe number of pressure difference value be unsatisfactory for preparatory condition.
It should be noted that above-mentioned application scenarios are for only for ease of the thought and principle for understanding the application and shown, thisThe embodiment of application is unrestricted in this regard.On the contrary, presently filed embodiment can apply to it is applicable anyScene.
After the technical scheme of the embodiment of the present invention is described, the various non-limiting realities of detailed description below the applicationApply mode.
Referring first to Fig. 2, Fig. 2 illustrates for a kind of flow of lung ventilator leak compensation method provided in an embodiment of the present inventionFigure, the embodiment of the present invention may include herein below：
S201：The first pressure sensor positioned at lung ventilator blower fan outlet side is obtained respectively, and positioned in the breathingThe second pressure sensor of machine outlet side, each pressure value in preset time period.
The pressure value that first pressure sensor is collected is regarded as the corresponding pressure of power output of blower fan, and second pressesThe pressure value that force snesor is collected is regarded as the pressure that user currently experiences.
Preset time period can be in 10s, or other any time, those skilled in the art can according to experience withAnd specific actual conditions are chosen, the application is not limited in any way to this.
Carried out in the section of preset time, pressure sensor carries out acquisition pressure value, pressure by different sample frequencysThe sample frequency of sensor can be any value in 500HZ, or 100-1000HZ, and this does not influence the realization of the application.
Preset time period determines the pressure data number of acquisition with sample frequency, for example, during 10s uses,Data are acquired with 500HZ sample frequencys, then can obtain 5000 data.
S202：Calculate the pressure differential of the first pressure sensor and the second pressure sensor in synchronizationValue, and count each number of the pressure difference value in the range of threshold pressure difference.
Because gas leakage can cause the insufficient pressure of lung ventilator, therefore need to increase the power output (rotating speed) of blower fan, to ensureUser has enough oxygen flows.But, in use, when power of fan is boosted to get on, and user passes throughCrossing adjustment causes gas leakage to recover normal, and now blower fan just belongs to excessive output state, so that the usage comfort of user is influenceed,Therefore need the power output gradually to blower fan to reduce.
Therefore, the leak compensation effect for blower fan can consider the two factor, therefore when judging the two pressure difference value,Need first to carry out judging which threshold range is difference is in.Threshold pressure difference scope may be less than 8cmH2O, or be more than10cmH2O, certainly, or other any values, this does not influence the realization of the application.Therefore when carrying out statistics number, canIt is less than 8cmH for statistics pressure difference value2O number, or statistics pressure difference value are more than 10cmH2O number.
S203：When the number of the pressure difference value meets preparatory condition, according to each in the range of the threshold pressure differenceThe endpoint value of individual pressure difference value and the threshold pressure difference scope, obtains the output adjustment power of the lung ventilator blower fan.
Judge whether the number of pressure difference value meets preparatory condition, can be：
When the pressure difference value is less than 8cmH2The pressure value number got in O number, with the preset time periodRatio be not less than 10%, then judge that the number of the pressure difference value meets preparatory condition；
When the pressure difference value is more than 10cmH2The pressure value got in O number, with the preset time periodSeveral ratio is not less than 90%, then judges that the number of the pressure difference value meets preparatory condition.
For example, when the sample frequency of pressure sensor is 500HZ, in 10S time span, 5000 can be gatheredData, as the pressure difference value ▽ P ﹤ 8cmH of the two2When O, an insufficient pressure is recorded, is occurred about when in 5000 dataDuring the record of 50 insufficient pressures, then judge to meet preparatory condition；When there are ▽ P ﹥ 10cmH2When O, a pressure is recordedIt is too high, when in 5000 data 90% as shown by data hypertonia, then judge to meet preparatory condition.
Certainly, the ratio of the number for meeting condition and the data amount check got altogether also can not be 10% and 90%,Those skilled in the art can be chosen according to experience and specific actual conditions, and the application is not limited in any way to this.
For being calculated according to the endpoint value of each pressure difference value in the range of threshold pressure difference and threshold pressure difference scopeThe output adjustment power of blower fan can be：
When the pressure difference value is less than 8cmH2When O number meets preparatory condition, calculate and be less than 8cmH2O pressure difference valueAverage value, by the 8cmH2The difference of O and the average value as the blower fan output adjustment power；
When the pressure difference value is more than 10cmH2When O number meets preparatory condition, calculate and be more than 10cmH2O pressure differentialThe average value of value, by the average value and the 10cmH2O difference as the blower fan output adjustment power.
For example, the pressure difference value of the two is ▽ P, and blower fan output adjustment power is OP.As ▽ P ﹤ 8cmH2O, then needThe power output of blower fan is improved, the average value MP of ▽ P when can calculate whole insufficient pressures, circular can be MP=(∑ ▽ P)/N, wherein N represent to meet the number of preparatory condition, N>50.After obtaining MP, then calculate between MP and 8cmH2OGap, then OP=8-MP；As ▽ P>10cmH2O, then need to reduce the power output of blower fan, can calculate whole hypertoniaWhen ▽ P average value MP, circular can be MP=(∑ ▽ P)/N, then OP=MP-10.
S204：The power output of the lung ventilator blower fan is adjusted according to the output adjustment power, until in instituteState in preset time period, the number of the pressure difference value in the threshold pressure difference scope is unsatisfactory for the preparatory condition.
The output adjustment power obtained according to S203, the power output to blower fan is adjusted, before, it is necessary to first be sentencedIt is disconnected, it is hoisting power or reduction power.
It should be noted that after to blower fan once adjust, increasing or decreasing after blower fan output power value, in addition it is also necessary toProceed S203 judgement, then the power output to blower fan carries out secondary adjustment again, until meeting threshold pressure difference scopeUntill the number of interior pressure value is unsatisfactory for preparatory condition.
In the technical scheme that the application is provided, by obtaining pressure sensor and lung ventilator at fan outlet in real timeThe pressure difference value of the pressure sensor of complete machine gas outlet, timely judges whether current lung ventilator is in gas leakage state, so that andWhen make leak compensation response, for the tolerance needed for user provides, meet the respiratory demand of user, raising lung ventilator canBy property and stability, be conducive to improving the comfort level of respiratory disorder patient, be conducive to improving the therapeutic quality of respiratory disorder.
Due to the influence of environmental factor, such as gas outlet is opened wide completely, sensor blocking or failure etc., now, blower fanRotating speed needs to accelerate, and power needs to improve, and the number of the pressure difference value in the range of the threshold pressure difference be unsatisfactory for always it is pre-If condition, then power of fan can be caused infinitely to rise, blower fan output pressure may finally be caused too high, blower fan overheat is even damagedThe problems such as occur, therefore also need to limit the peak power of blower fan, while provide the defencive function to blower fan, in view ofThis, based on above-described embodiment, present invention also provides another embodiment, specifically may include：
S205：When the power output of presently described lung ventilator blower fan reaches peak power output threshold value, judge described defeatedGo out to adjust whether power is not more than adjustment power threshold；
The peak power output of blower fan determines that peak power output threshold value can by blower fan parameter in itself and actual conditionsFor the 90% of the blower fan peak power output.
It can be 2cmH to adjust power threshold2O, or other values, this does not influence the realization of the application.
S206：When judging that the output adjustment power is not more than the adjustment power threshold, continue to adjust the breathingThe power output of machine blower fan is until blower fan peak power output；
S207：When judging that the output adjustment power is more than the adjustment power threshold, then by the lung ventilator blower fanPower output adjust to blower fan minimum output power.
The minimum output power of blower fan is determined by blower fan parameter in itself and actual conditions.
In addition, when according to the power output of output adjustment power ascension lung ventilator blower fan, and current lung ventilator blower fanWhen power output reaches the blower fan peak power output, for some reason, cause the pressure in the range of threshold pressure differenceThe number of power difference is unsatisfactory for preparatory condition always, in order to avoid blower fan output pressure is too high, and the even damage etc. of blower fan overheat is askedTopic occurs, and the application additionally provides one embodiment based on one embodiment.
S205：Judge whether the pressure value of second pressure sensor meets user's request pressure in preset time rangeValue；
Time more than 50% during preset time range can be intended for single use for lung ventilator, or other times section.For example, during the use in 10s, if more than the 5s pressure values exported, can not all to meet user required, thenIllustrate that lung ventilator can not meet the respiratory demand of user by compensating power output.
S206：When the pressure value for judging the second pressure sensor can not meet user's request in preset time rangePressure value, then adjusted the power output of the lung ventilator blower fan to blower fan minimum output power.
In this case, lung ventilator there may be other problemses, in order to ensure treatment experience that user got well, it is necessary toReminded in time, to point out relevant staff to take certain measure.
Alarm that can be by sending a hypotony is used to remind user that treatment now has been unable to reach expection.
The embodiment of the present invention provides also directed to lung ventilator leak compensation method and realizes device accordingly, further such that instituteMethod is stated with more practicality.Device provided in an embodiment of the present invention is introduced below, lung ventilator leakage described belowThe device of gas compensation and the method for above-described lung ventilator leak compensation can be mutually to should refer to.
Referring to Fig. 4, Fig. 4 is lung ventilator leak compensation device provided in an embodiment of the present invention under a kind of embodimentStructure chart, the device may include：
Pressure value module 401 is obtained, for obtaining the first pressure sensor positioned at lung ventilator blower fan outlet side respectively, withAnd positioned at the second pressure sensor in the lung ventilator outlet side, each pressure value in preset time period.
Pressure difference value module 402 is calculated, for calculating the first pressure sensor and the second pressure sensorIn the pressure difference value of synchronization, and count each number of the pressure difference value in the range of threshold pressure difference.
It is determined that adjustment power model 403, for when the number of the pressure difference value meets preparatory condition, according to the pressureThe endpoint value of each pressure difference value and the threshold pressure difference scope in power difference threshold range, obtains the lung ventilator blower fanOutput adjustment power.
Power of fan module 404 is adjusted, for according to output work of the output adjustment power to the lung ventilator blower fanRate is adjusted, until in the preset time period, the number of the pressure difference value in the threshold pressure difference scope is discontented withThe foot preparatory condition.
Optionally, in some embodiments of the present embodiment, referring to Fig. 5, described device can also for example include：
First judge module 405, for when the output work of the lung ventilator blower fan according to the output adjustment power ascensionDuring rate, and the power output of presently described lung ventilator blower fan is when reaching peak power output threshold value, judges the output adjustment work(Whether rate is not more than adjustment power threshold；When judging that the output adjustment power is not more than the adjustment power threshold, continueThe power output of the lung ventilator blower fan is adjusted until blower fan peak power output；When the judgement output adjustment power is more than instituteWhen stating adjustment power threshold, then the power output of the lung ventilator blower fan is adjusted to blower fan minimum output power.
In another embodiment, referring to Fig. 5, described device for example also includes：
Second judge module 406, for can not in preset time range when the pressure value of the second pressure sensorUser's request pressure value is met, then is adjusted the power output of the lung ventilator blower fan to blower fan minimum output power.
The function of each functional module of lung ventilator leak compensation device described in the embodiment of the present invention can be real according to the above methodThe method applied in example is implemented, and it implements the associated description that process is referred to above method embodiment, herein no longerRepeat.
From the foregoing, it will be observed that the embodiment of the present invention by obtaining pressure sensor and lung ventilator complete machine at fan outlet in real timeThe pressure difference value of the pressure sensor of gas outlet, timely judges whether current lung ventilator is in gas leakage state, so as to make in timeGo out leak compensation response, for the tolerance needed for user provides, meet the respiratory demand of user, improve the reliability of lung ventilatorAnd stability, be conducive to improving the comfort level of respiratory disorder patient, be conducive to improving the therapeutic quality of respiratory disorder.
The embodiment of the present invention additionally provides a kind of noninvasive ventilator, refers to Fig. 6, it may include pressure sensor 601, blower fan602 and the device 603 of lung ventilator leak compensation as described above.
Pressure sensor 601 is used to gather breathing machine pipeline, blower fan gas outlet and the pressure value of complete machine gas outlet in real time.
Blower fan 602 is used to provide pressure for lung ventilator.
The function of the device 603 of lung ventilator leak compensation refers to above-described embodiment with implementing, and just no longer goes to live in the household of one's in-laws on getting married hereinState.
Certainly, the noninvasive ventilator also includes other elements, and such as flow sensor is just repeated no more herein.
The function of each functional module of noninvasive ventilator described in the embodiment of the present invention can be according in above method embodimentMethod is implemented, and it implements the associated description that process is referred to above method embodiment, and here is omitted.
From the foregoing, it will be observed that the embodiment of the present invention by obtaining pressure sensor and lung ventilator complete machine at fan outlet in real timeThe pressure difference value of the pressure sensor of gas outlet, timely judges whether current lung ventilator is in gas leakage state, so as to make in timeGo out leak compensation response, for the tolerance needed for user provides, meet the respiratory demand of user, improve the reliability of lung ventilatorAnd stability, be conducive to improving the comfort level of respiratory disorder patient, be conducive to improving the therapeutic quality of respiratory disorder.
The embodiment of each in this specification is described by the way of progressive, what each embodiment was stressed be with it is otherBetween the difference of embodiment, each embodiment same or similar part mutually referring to.For being filled disclosed in embodimentFor putting, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method partExplanation.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein descriptionAnd algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware andThe interchangeability of software, generally describes the composition and step of each example according to function in the above description.TheseFunction is performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.SpecialtyTechnical staff can realize described function to each specific application using distinct methods, but this realization should notThink beyond the scope of this invention.
Directly it can be held with reference to the step of the method or algorithm that the embodiments described herein is described with hardware, processorCapable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only depositReservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technologyIn any other form of storage medium well known in field.
A kind of method, device and the noninvasive ventilator of lung ventilator leak compensation provided by the present invention are carried out aboveIt is discussed in detail.Specific case used herein is set forth to the principle and embodiment of the present invention, above exampleIllustrate the method and its core concept for being only intended to help to understand the present invention.It should be pointed out that for the common skill of the artFor art personnel, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these changeEnter and modify to also fall into the protection domain of the claims in the present invention.