CN104623777A - Pressure generator type recognition method and device - Google Patents
Pressure generator type recognition method and device Download PDFInfo
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- CN104623777A CN104623777A CN201510091577.2A CN201510091577A CN104623777A CN 104623777 A CN104623777 A CN 104623777A CN 201510091577 A CN201510091577 A CN 201510091577A CN 104623777 A CN104623777 A CN 104623777A
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Abstract
The invention discloses a pressure generator type recognition method. The method includes the steps of acquiring a pressure signal of an intake end of a pressure generator in a respirator, a pressure signal of an adnasal end of the pressure generator and a flow signal of gas flowing by the pressure generator; calculating a correspondence of the signals; acquiring feature relations among the intake end pressures and adnasal end pressures of various pressure generators, suitable for the respirator, and the flows of gas flowing by the pressure generators; comparing the correspondence with the feature relations of the pressure generators so as to determine the types of the pressure generators. The pressure generator type recognition method and device has the advantages that medical staff can directly use recognition results to accurately set the types of the pressure generators in the respirator, mistaken setting caused by the fact that the medical staff is not familiar with the types of the pressure generators in the respirator and safety is high. The invention further discloses the pressure generator type recognition device.
Description
Technical field
The present invention relates to technical field of medical equipment, particularly relate to a kind of pressure generator kind identification method and device.
Background technology
Current respirator (such as neonate per nasal noninvasive ventilator) can be divided into according to its Positive Airway Pressure producing method: (1) dual circuit type respirator with mechanical outlet valve, produces Positive Airway Pressure by the pressure controlling mechanical outlet valve; (2) using the respirator of pressure generator, producing Positive Airway Pressure by regulating flow velocity size.Use the respirator of pressure generator can realize nearly nose pressure monitoring with it and more and more be applied clinically.
The type being applicable to the pressure generator in respirator is at present many, and different pressure generator types has different pressure and flow corresponding relation.Traditional respirator can not identify automatically to pressure generator type, need to pre-set pressure generator type by medical personnel, and according to the pressure of pressure generator and flow corresponding relation featured configuration flow or the laggard gas that works of pressure, operation comparatively bothers.And medical personnel be not to the flow of often kind of pressure generator and pressure corresponding relation characteristic all very clear, some that can cause clinically arrange by mistake and then cause respirator Output pressure abnormal and produce clinical risk.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of and can automatically identify pressure generator type and the higher pressure generator kind identification method of safety.
Additionally provide a kind of pressure generator type identification device.
A kind of pressure generator kind identification method, for automatically identifying the type of the pressure generator in respirator, comprise the following steps: gather the inlet end pressure signal of the pressure generator in respirator, nearly nose pressure signal and flow through the gas flow signals of described pressure generator; Calculate the corresponding relation between described inlet end pressure signal, nearly nose pressure signal and described gas flow signals three; Obtain the characteristic relation between the inlet end pressure, closely the nose pressure that are applicable to each pressure generator type of respirator and the gas flow flowing through pressure generator; Identify the type of described pressure generator; Be specially, by the inlet end pressure of the corresponding relation calculated and each pressure generator type, nearly nose pressure and flow through pressure generator gas flow between characteristic relation compare thus determine the type of described pressure generator.
Wherein in an embodiment, the inlet end pressure signal of the pressure generator in described collection respirator, nearly nose pressure signal and flow through described pressure generator gas flow signals step before also comprise step: zero point correction is carried out to pressure transducer.
Wherein in an embodiment, the inlet end pressure signal of the pressure generator in described collection respirator, nearly nose pressure signal and flow through described pressure generator gas flow signals step after, also comprise step before the step of corresponding relation between described calculating described inlet end pressure signal, nearly nose pressure signal and described gas flow signals three: described inlet end pressure signal and described nearly nose pressure signal to be amplified, Filtering Processing.
Wherein in an embodiment, also comprise after the step of the type of the described pressure generator of described identification: the pressure generator type automatically upgrading described respirator.
Wherein in an embodiment, after the step of the pressure generator type of the described respirator of described automatic renewal, also comprise step: pressure or flow that pressure generator is set according to the characteristic relation of the pressure generator type after renewal.
Wherein in an embodiment, after the step of the type of the described pressure generator of described identification, before the step of the pressure generator type of the described respirator of described automatic renewal, also comprise step: judge that whether the pressure generator type recognized is consistent with pressure generator type default in described respirator; If not, then perform the step of the pressure generator type of the described respirator of described automatic renewal, and give the alarm; If so, then end operation.
A kind of pressure generator type identification device, for automatically identifying the type of the pressure generator in respirator, comprising: inlet end pressure transducer, for gathering the inlet end pressure signal of pressure generator; Nearly nose pressure transducer, for gathering the nearly nose pressure signal of described pressure generator; Gas flow sensor, for the gas flow signals of acquisition stream through described pressure generator; Memory module, for the characteristic relation between the gas flow that stores the inlet end pressure of each pressure generator type being applicable to respirator, nearly nose pressure and flow through pressure generator; And control module, comprise computing unit, for calculating the corresponding relation between described inlet end pressure signal, nearly nose pressure signal and described gas flow signals three; Recognition unit, for the type of pressure generator according to described corresponding relation identification; Be specially, the characteristic relation between the described inlet end pressure of each pressure generator type stored in the corresponding relation calculated and described memory module, nearly nose pressure and described gas flow is compared thus determines the type of described pressure generator.
Wherein in an embodiment, also comprise signal processing circuit, for amplifying described inlet end pressure signal, nearly nose pressure signal, Filtering Processing.
Wherein in an embodiment, also comprise school zero circuit, be connected with described control module, described inlet end pressure transducer and described nearly nose pressure transducer respectively; Described school zero circuit is used for carrying out zero point correction to described inlet end pressure transducer and described nearly nose pressure transducer under the control of described control module.
Wherein in an embodiment, described control module also comprises judging unit and updating block; Whether described judging unit is consistent with the pressure generator type preset in described respirator for judging the pressure generator type recognized; When described updating block is used for the pressure generator Type-Inconsistencies preset in described judging unit judges the pressure generator type that recognizes and described respirator, the pressure generator type in renewal respirator.
Above-mentioned pressure generator kind identification method and device, the corresponding relation between three is calculated according to the inlet end pressure signal collected, nearly nose pressure signal and gas flow signals, and by the corresponding relation calculated and the known inlet end pressure being applicable to each pressure generator type of respirator, nearly nose pressure and flow through pressure generator gas flow between characteristic relation compare, thus realize the automatic accurate identification to the pressure generator type in respirator.By above-mentioned pressure generator kind identification method and device, medical personnel can directly utilize recognition result accurately to arrange the pressure generator type in respirator, can effectively avoid because to the pressure generator type in respirator, medical personnel do not know that the mistake caused is arranged, safety is higher.
Accompanying drawing explanation
Fig. 1 is the flow chart of the pressure generator kind identification method in an embodiment;
Fig. 2 is the flow chart of the pressure generator kind identification method in another embodiment;
Fig. 3 is the structural representation of the pressure generator recognition device in an embodiment;
Fig. 4 is the circuit theory diagrams of the school zero circuit in the pressure generator recognition device shown in Fig. 3;
Fig. 5 is the structural representation of school zero valve in the pressure generator recognition device shown in Fig. 3;
Fig. 6 is the circuit theory diagrams of the signal processing circuit in the pressure generator recognition device shown in Fig. 3.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 is the flow chart of the pressure generator kind identification method in an embodiment, for automatically identifying the type of the pressure generator in respirator.In the present embodiment, pressure generator is the device that a kind of single breathing pipeline connects, produces by continuous flow airway pressure.Pressure generator is arranged on patient's nasal cavity, is connected with patient by nasal obstruction or nose cup, and operation principle is the size of the gas flow by regulating pressure generator, realizes different airway pressures.A kind of pressure generator kind identification method comprises the following steps:
S110, gathers the inlet end pressure signal of the pressure generator in respirator, nearly nose pressure signal and flows through the gas flow signals of pressure generator.
The inlet end of the pressure generator in respirator arranges inlet end pressure transducer and gathers inlet end pressure signal, and the pressure signal collected is P1.Arrange nearly nose pressure transducer at the nearly nose of pressure generator to gather nearly nose pressure signal, the pressure signal collected is P2.In the present embodiment, the gas outputted in pressure generator comprises oxygen source and air source of the gas, therefore arrange corresponding flow transducer in each source output end respectively to gather the oxygen flow F1 be sent in pressure generator and air mass flow F2, thus realize the collection to the gas flow F flowed through in pressure generator.In other examples, also can be gathered the gas flow F flowed through in pressure generator by a flow transducer.Gas flow outputs to pressure generator by pipeline, and under the effect of pressure generator, finally produces Positive Airway Pressure at the nearly nose of patient.
In the present embodiment, be improve the precision of image data, also can perform step: inlet end pressure signal, nearly nose pressure signal to be amplified, Filtering Processing.For the precision improving image data also can perform step before S110: carry out zero point correction to pressure transducer.That is, controlled unlatching and the closedown of school zero valve by school zero circuit, thus realize the zero point correction to pressure transducer, to ensure precision and the accuracy of image data.
S120, calculates the corresponding relation between inlet end pressure signal, nearly nose pressure signal and gas flow signals three.
The corresponding relation between three is calculated by the inlet end pressure signal collected, nearly nose pressure signal and gas flow.For this corresponding relation can be calculated accurately, acquisition can be calculated by gathering multi-group data.In pressure generator, when flowing through the gas flow in pressure generator in different scopes, different corresponding relations can be there is between inlet end pressure signal, nearly nose pressure signal, therefore can obtain the corresponding relation between three by inlet end pressure signal, closely the nose pressure signal gathered under gas with various range of flow.
S130, obtains the characteristic relation between the inlet end pressure, closely the nose pressure that are applicable to each pressure generator type of respirator and the gas flow flowing through pressure generator.
The pressure generator type be applicable at present in respirator is more, and different pressure generator types has different inlet end pressure, nearly nose pressure and flows through the characteristic relation between the gas flow of pressure generator.Therefore need to get the characteristic relation corresponding to pressure generator type be applicable in respirator existed at present.Because S130 only can have an impact to subsequent step, therefore in other examples, before S130 also can be placed on the step of S110 or S120.In the present embodiment, for alleviating the workload of the identifying of whole pressure generator, for there is the different pressures generator type of identical characteristics relation all with a kind of pressure generator type wherein representatively.For the pressure generator type in per nasal noninvasive ventilator, it is several that its pressure generator type comprises Infant Flow, Medijet, Infant Flow LP and Inspire nCPAP, wherein the characteristic of Infant Flow, Infant Flow LP and Inspire nCPAP pressure generator is basically identical, therefore in acquisition process, only with Infant Flow pressure generator for representative, the characteristic relation got is as shown in table 1.
Table 1: the inlet end pressure of each pressure generator type of per nasal noninvasive ventilator, nearly nose pressure and flow through pressure generator gas flow between characteristic relation
| Fresh gas flow F (L/Min) | Infant Flow pressure generator | Medijet pressure generator |
| <＝2 | P1>2*P2 | P1>P2+0.5 |
| >2，<＝10 | P1>2.5*P2 | P1>P2+1 |
| >10，<＝20 | P1>3*P2 | P1>1.5*P2 |
S140, identifies the type of pressure generator.
The characteristic relation of the corresponding relation calculated with each pressure generator type got is compared, the pressure generator type in respirator can be determined when corresponding relation meets the characteristic relation of a certain pressure generator type, thus realize automatically identifying pressure generator type.
Above-mentioned pressure generator kind identification method, the corresponding relation between three is calculated according to the inlet end pressure signal collected, nearly nose pressure signal and gas flow signals, and by the corresponding relation calculated and the known inlet end pressure being applicable to each pressure generator type of respirator, nearly nose pressure and flow through pressure generator gas flow between characteristic relation compare, thus realize the automatic accurate identification to the pressure generator type in respirator.By above-mentioned pressure generator kind identification method, medical personnel can directly utilize recognition result accurately to arrange the pressure generator type in respirator, can effectively avoid because to the pressure generator type in respirator, medical personnel do not know that the mistake caused is arranged, safety is higher.
Fig. 2 is the flow chart of the pressure generator kind identification method in another embodiment, comprises step S210 ~ S270.Wherein, S210 ~ S240 by the agency of in the aforementioned embodiment, does not repeat herein.
S250, judges that whether the pressure generator type recognized is consistent with the pressure generator type preset in respirator.
When the pressure generator Type-Inconsistencies preset in the pressure generator type recognized and respirator, perform step S260, otherwise then perform step S270.
S260, upgrades the pressure occurrence type of respirator automatically.
Pressure generator type in respirator is upgraded automatically, and gives the alarm, remind medical personnel to reach the risk reducing Clinical practice, improve safety.In the present embodiment, pressure or the flow of pressure generator also can be set according to the characteristic relation of the pressure generator type after renewal, export to reach airway pressure accurately, finally reach the therapeutic effect of expection, and reduce Clinical practice risk.
S270, end operation.
Above-mentioned pressure generator kind identification method, automatically identify the pressure generator type of respirator and the pressure generator type recognized and preset pressure generator Type-Inconsistencies time, automatic renewal also gives the alarm, and can reduce Clinical practice risk, improve safety.Further, pressure or the flow of pressure generator also can be set according to the characteristic relation of the pressure generator type after renewal, export to reach airway pressure accurately, finally reach the therapeutic effect of expection, and reduce Clinical practice risk.
Present invention also offers a kind of pressure generator type identification device, for automatically identifying the type of the pressure generator in respirator, its structural representation as shown in Figure 3.In the present embodiment, pressure generator is the device that a kind of single breathing pipeline connects, produces by continuous flow airway pressure.Pressure generator is arranged on patient's nasal cavity, is connected with patient by nasal obstruction or nose cup, and operation principle is the size of the air-flow by regulating pressure generator, realizes different airway pressures.
A kind of pressure generator type identification device, comprises inlet end pressure transducer 302, nearly nose pressure transducer 304, gas flow sensor 306, memory module (not shown) and control module (not shown).Wherein, inlet end pressure transducer 302 is arranged at the inlet end of pressure generator, i.e. the exit of live gas, for gathering the inlet end pressure signal P 1 of pressure generator.Nearly nose pressure transducer 304 is arranged at the nearly nose of pressure generator, for gathering nearly nose pressure signal P 2.In the present embodiment, the gas outputted in pressure generator comprises oxygen source and air source of the gas, therefore arrange corresponding gas flow sensor 306 in each source output end respectively to gather the oxygen flow F1 be sent in pressure generator and air mass flow F2, thus realize the collection to the gas flow F flowed through in pressure generator.In other examples, also can be gathered by the gas flow F of a flow transducer to live gas exit.In the present embodiment, flow transducer uses the high-precision flow sensor of Honeywell company, and precision is high, good stability, well can realize the high precision monitor of ventilation flow rate.Pressure transducer then uses the high accuracy differential pressure type pressure transducer of GE company, and the measuring range of pressure transducer is 1psi (1psi=6.895kPa), outputs signal as differential signal.
For improving the precision of image data, above-mentioned pressure generator type identification device also comprises school zero circuit 308 and signal processing circuit (not shown).School zero circuit 308 for carrying out zero point correction, to ensure precision and the accuracy of image data to inlet end pressure transducer 302 and nearly nose pressure transducer 304 under the control of control module.In the present embodiment, school zero circuit 308 comprises circuit part and school zero valve, and Fig. 4 is the circuit theory diagrams of school zero circuit 308, and Fig. 5 is then the structural representation of school zero valve.In the present embodiment, school zero valve adopts 23 flow-through valves, and pressure transducer is connected to the port 2 of school zero valve, and the port one of school zero valve is then connected with air, and port 3 is pressure transducer thief hatch.Particularly, when pressure transducer normally works, port 3 is communicated with port 2.When carrying out school zero to pressure transducer, port 3 closes, and port 2 is communicated with port one, and the thief hatch of pressure transducer is facing to air, and pressure is input as 0.The switching of school zero valve is realized by the control of metal-oxide-semiconductor Q17.
Signal processing circuit is used for amplifying inlet end pressure signal, nearly nose pressure signal, Filtering Processing.Pressure transducer adopts constant-current source type of drive, and Constant Current-Source Design adopts operational amplifier design, and drive current is set to 1mA.Amplifying circuit adopts instrumentation amplifier AD623, and have high input impedance, high cmrr, low noise, low drifting, temperature stability is good, and amplification band is wide, the advantage that noise coefficient is little, and operational amplifier amplifies 35 times.Signal after amplification exports to control module after second-order active power filter circuit filtering, and its circuit theory as shown in Figure 6.
Memory module is for the characteristic relation between the gas flow that stores the inlet end pressure of each pressure generator type being applicable to respirator, nearly nose pressure and flow through pressure generator.In the present embodiment, for alleviating the workload of the identifying of whole pressure generator, the different pressures generator type with identical characteristics relation is all representatively stored with a kind of pressure generator type wherein.
Control module comprises computing unit and recognition unit.Computing unit is for calculating the corresponding relation between described inlet end pressure signal, nearly nose pressure signal and described gas flow signals three.Recognition unit, for the type according to the corresponding relation identification pressure generator calculated.Particularly, characteristic relation between the inlet end pressure of each pressure generator type stored in the corresponding relation calculated and memory module, nearly nose pressure and gas flow can compare by recognition unit, the pressure generator type in respirator can be determined when corresponding relation meets the characteristic relation of a certain pressure generator type, thus realize automatically identifying pressure generator type.
Above-mentioned pressure generator type identification device, the corresponding relation between three is calculated according to the inlet end pressure signal collected, nearly nose pressure signal and gas flow signals, and by the corresponding relation calculated and the known inlet end pressure being applicable to each pressure generator type of respirator, nearly nose pressure and flow through pressure generator gas flow between characteristic relation compare, thus realize the automatic accurate identification to the pressure generator type in respirator.By above-mentioned pressure generator type identification device, medical personnel can directly utilize recognition result accurately to arrange the pressure generator type in respirator, can effectively avoid because to the pressure generator type in respirator, medical personnel do not know that the mistake caused is arranged, safety is higher.
In another embodiment, control module also comprises judging unit, updating block and alarm unit.Whether judging unit is consistent with the pressure generator type preset in respirator for judging the pressure generator type recognized.When updating block is used for the pressure generator Type-Inconsistencies preset in judging unit judges the pressure generator type that recognizes and respirator, the pressure generator type in renewal respirator.Meanwhile, alarm unit can give the alarm, and to remind medical personnel to reach the risk reducing Clinical practice, improves safety.In the present embodiment, updating block also can arrange pressure or the flow of pressure generator according to the characteristic relation of the pressure generator type after renewal, exports, finally reach the therapeutic effect of expection, and reduce Clinical practice risk to reach airway pressure accurately.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this description is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a pressure generator kind identification method, for automatically identifying the type of the pressure generator in respirator, comprises the following steps:
Gather the inlet end pressure signal of the pressure generator in respirator, nearly nose pressure signal and flow through the gas flow signals of described pressure generator;
Calculate the corresponding relation between described inlet end pressure signal, nearly nose pressure signal and described gas flow signals three;
Obtain the characteristic relation between the inlet end pressure, closely the nose pressure that are applicable to each pressure generator type of respirator and the gas flow flowing through pressure generator;
Identify the type of described pressure generator; Be specially, by the inlet end pressure of the corresponding relation calculated and each pressure generator type, nearly nose pressure and flow through pressure generator gas flow between characteristic relation compare thus determine the type of described pressure generator.
2. pressure generator kind identification method according to claim 1, it is characterized in that, the inlet end pressure signal of the pressure generator in described collection respirator, nearly nose pressure signal and flow through described pressure generator gas flow signals step before also comprise step: zero point correction is carried out to pressure transducer.
3. pressure generator kind identification method according to claim 1, it is characterized in that, the inlet end pressure signal of the pressure generator in described collection respirator, nearly nose pressure signal and flow through described pressure generator gas flow signals step after, also comprise step before the step of corresponding relation between described calculating described inlet end pressure signal, nearly nose pressure signal and described gas flow signals three:
Described inlet end pressure signal and described nearly nose pressure signal are amplified, Filtering Processing.
4. pressure generator kind identification method according to claim 1, is characterized in that, also comprises after the step of the type of the described pressure generator of described identification: the pressure generator type automatically upgrading described respirator.
5. pressure generator kind identification method according to claim 4, it is characterized in that, after the step of the pressure generator type of the described respirator of described automatic renewal, also comprise step: pressure or flow that pressure generator is set according to the characteristic relation of the pressure generator type after renewal.
6. pressure generator kind identification method according to claim 4, is characterized in that, after the step of the type of the described pressure generator of described identification, also comprises step before the step of the pressure generator type of the described respirator of described automatic renewal:
Judge that whether the pressure generator type recognized is consistent with the pressure generator type preset in described respirator; If not, then perform the step of the pressure generator type of the described respirator of described automatic renewal, and give the alarm; If so, then end operation.
7. a pressure generator type identification device, for automatically identifying the type of the pressure generator in respirator, is characterized in that, comprising:
Inlet end pressure transducer, for gathering the inlet end pressure signal of pressure generator;
Nearly nose pressure transducer, for gathering the nearly nose pressure signal of described pressure generator;
Gas flow sensor, for the gas flow signals of acquisition stream through described pressure generator;
Memory module, for the characteristic relation between the gas flow that stores the inlet end pressure of each pressure generator type being applicable to respirator, nearly nose pressure and flow through pressure generator; And
Control module, comprises
Computing unit, for calculating the corresponding relation between described inlet end pressure signal, nearly nose pressure signal and described gas flow signals three;
Recognition unit, for the type of pressure generator according to described corresponding relation identification; Be specially, the characteristic relation between the described inlet end pressure of each pressure generator type stored in the corresponding relation calculated and described memory module, nearly nose pressure and described gas flow is compared thus determines the type of described pressure generator.
8. pressure generator type identification device according to claim 7, is characterized in that, also comprise signal processing circuit, for amplifying described inlet end pressure signal, nearly nose pressure signal, Filtering Processing.
9. pressure generator type identification device according to claim 7, is characterized in that, also comprise school zero circuit, is connected respectively with described control module, described inlet end pressure transducer and described nearly nose pressure transducer; Described school zero circuit is used for carrying out zero point correction to described inlet end pressure transducer and described nearly nose pressure transducer under the control of described control module.
10. pressure generator type identification device according to claim 7, it is characterized in that, described control module also comprises judging unit and updating block;
Whether described judging unit is consistent with the pressure generator type preset in described respirator for judging the pressure generator type recognized;
When described updating block is used for the pressure generator Type-Inconsistencies preset in described judging unit judges the pressure generator type that recognizes and described respirator, the pressure generator type in renewal respirator.
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| CN114126691A (en) * | 2019-12-03 | 2022-03-01 | 深圳迈瑞生物医疗电子股份有限公司 | Pressure generating device identification method and system, ventilation support device, and storage medium |
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Effective date of registration: 20190304 Address after: 518000 South Ring Road, Matian Street, Guangming District, Shenzhen City, Guangdong Province Co-patentee after: Seventh Medical Center, General Hospital of the Chinese People's Liberation Army Patentee after: Shenzhen Comen Medical Instruments Co., Ltd. Address before: 518052 Nanshan Avenue Nanyou Fourth Industrial Zone, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Comen Medical Instruments Co., Ltd. |