The detection method of respirator, equipment and systemTechnical field
The present invention relates to a kind of detection method, equipment and system of respirator.
Background technology
Respirator is first aid and the therapeutic equipment of commonly using clinically, and it can be supported for patient provides to breathe, even can substitute human body completely and ventilate.Because the use object of respirator is mainly critical state of an illness patient, therefore, guarantee stability and the reliability of respirator work, be to reduce medical-risk, guarantee of the medical safety prerequisite and needs.Medical department, before using respirator, must detect and check the output parameter of respirator, reliability and security performance.
Respirator checkout equipment in engineering in medicine field and armarium calibrating metering field obtained application comparatively widely.As the Certifier FAPlus of PF-300, the TSI of QA-VTM, the Imtmedical of the VT-PLUS of FLUKE and VT-Mobile, METRON.These checkout equipments adopt identical detection method, can both detect the s main working parameters of respirator.
At present, the detection of respirator is related generally to three aspects:
1, the detection of respirator s main working parameters: aforementioned respirator checkout equipment to the detection method of respirator s main working parameters as shown in Figure 1.Detector is serially connected between Y-type three way type and test lung, and by monitoring stream two-way airflow flow velocity and the airway pressure of instrument after testing, groundwork parameter and the output value that can realize respirator detect.Detector adopts two-way flow sensor, in the time that air-flow flows to test lung from breathing circuit, air-flow velocity get on the occasion of, this is inspiratory flow rate.In the time that air-flow flows to breathing circuit from test lung, this flow velocity is exhalation flow rate.
The flow velocity detecting when detector by zero or negative value increase on the occasion of time, can assert that current respiratory movement transfers inspiratory phase to by expiratory phase; And when flow velocity is by the time being reduced to negative value, can assert that current respiratory movement transfers expiratory phase to by inspiratory phase.An inspiratory phase and an expiratory phase are in succession a complete breathing cycle altogether.Like this, by judging the positive and negative and change in flow situation of the numerical value of flow velocity, coordinate the increase and decrease of airway pressure, can realize the measurement of respiratory frequency, inspiratory duration, expiratory duration, breath holding time, these time control parameters of expiratory apnea time.
By to carrying out integration in the flow velocity of inspiratory duration section, expiratory duration section, can realize the measurement to air-breathing tidal volume, expiration tidal volume; By the detection to the positive and negative peak value of flow velocity, can realize the detection to inspiration peak flow velocity and expiration peak velocity; By the detection to airway pressure peak value, can realize the detection to inspiration peak pressure; By to detecting in the airway pressure of breath holding time section, can realize the detection of flateau pressure; By to detecting in the airway pressure of expiratory apnea time period, can realize the measurement of end expiratory positive pressure.
According to parameters such as the inspiration peak pressure measuring, plateau pressure, tidal volume, inspiratory flow rates, can calculate compliance and these two mechanics of breathing indexs of airway resistance of lung.
Above-mentioned detection method as shown in Figure 2.
2, gas leakage is measured: because system shown in Figure 1 cannot be measured respectively the flow velocity in air-breathing loop and expiration loop, therefore, adopt this method of attachment not measure system gas leakage situation.So leak-testing is carried out in general employing method of attachment as shown in Figure 3.
Method of testing is by the loop certain pressure level of pressurizeing, and then measures the decrease of the circuit pressure in certain hour section.Using the pressure decline amount in the unit interval as gas leakage index.
This method can only static measurement test lung or the air-tightness of pressure vessel.Can not reflect the real-time gas leakage situation in the middle of work process in loop.
3, elementary streams is measured: the respirator with flow velocity Trigger Function can continue a stable flow velocity of output from suction end in expiratory phase, is used to detection patient autonomous respiration to make great efforts to provide biasing flow velocity.In respirator work process, the circulation path of elementary streams as shown in Figure 4.
VT-PLUS in aforementioned respiration detection equipment can Fundamentals of Measurement flow, but needs to adopt method as shown in Figure 5.In this case, need to interrupt the measurement of respirator routine work parameter, or can only measure inspiratory flow rate, and can not detect exhalation flow rate, thereby can not calculate a few thing parameter (such as expiration tidal volume, expiration peak velocity etc.) of expiratory phase.Thereby bring limitation and inconvenience to real-time Fundamentals of Measurement stream.
Can not carry out the problem of measuring in real time to air leakage or elementary streams when respirator being detected in correlation technique, not yet propose at present effective solution.
Summary of the invention
Can not carry out the problem of measuring in real time and propose the present invention air leakage or elementary streams when respirator being detected in correlation technique, for this reason, main purpose of the present invention be to provide a kind of detection method of respirator, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of checkout equipment of respirator.
Comprise according to the detection of respirator of the present invention, equipment and system method: test lung, under the control of respirator, carry out the air-breathing or operation of exhaling; Gas pressure sensor, is arranged in the 3rd gas passage being connected with test lung, and the gas pressure of input and output gas in the 3rd gas passage is detected; The first gas passage, one end is connected in the 3rd gas passage, and the other end is connected in the suction end of respirator; The second gas passage, one end is connected in the 3rd gas passage, and the other end is connected in the expiration end of respirator, wherein, is respectively arranged with the first air flow rate sensor and the second air flow rate sensor in the first gas passage and the second gas passage.
Preferably, the first gas passage is air intake passage, unlatching in the time that test lung is carried out suction operation, and the first air flow rate sensor detects the gas flow rate in the first gas passage; The second gas passage is exhalation passages, in the time that test lung is exhaled operation, opens, and the second air flow rate sensor detects the gas flow rate in the second gas passage.
Preferably, in the time that test lung is carried out suction operation, gas pressure sensor detects the pressure of inspiration(Pi) of respirator; In the time that test lung is exhaled operation, gas pressure sensor 8 detects the pressure of inspiration(Pi) of respirator.
Preferably, the first air flow rate sensor, the second air flow rate sensor and gas pressure sensor 8 are connected via Y-type three way type, and lay respectively at three ends of Y-type three way type.
Preferably, the first gas passage is connected by the suction end of the checkout equipment of respirator and the suction end of respirator; The second gas passage is connected by the expiration end of the checkout equipment of respirator and the expiration end of respirator.
To achieve these goals, according to a further aspect in the invention, provide a kind of detection system of respirator.
Comprise according to the detection system of respirator of the present invention: respirator, has suction end and the end of exhaling; The checkout gear of respirator, is provided with: the first gas passage, be connected in suction end, and be wherein provided with the first air flow rate sensor; The second gas passage, is connected in the end of exhaling, and is wherein provided with the second air flow rate sensor; Test lung, coordinates respirator to carry out the air-breathing or operation of exhaling; The 3rd gas passage, one end is connected with the first gas passage and the second gas passage, and the other end is connected with test lung, is wherein provided with gas pressure sensor.
Preferably, the first gas passage, the second gas passage and the 3rd gas passage form Y-type three way type.
To achieve these goals, according to a further aspect in the invention, provide a kind of detection method of respirator.
Comprise according to the detection method of respirator of the present invention: by the first air flow rate sensor, the air-breathing gas flow rate of respirator is detected; By the second air flow rate sensor, the expiration gas flow velocity of respirator is detected; By gas pressure sensor, the air-breathing gas pressure to respirator and expiration gas pressure detect respectively.
Preferably, at respirator, while being air-breathing, the first air flow rate sensor detects the air-breathing gas flow rate of respirator, and gas pressure sensor detects the inspiratory duration section airway pressure of respirator; In the time that respirator is expiration, the second air flow rate sensor detects the expiration gas flow velocity of respirator, and gas pressure sensor detects the expiratory duration section airway pressure of respirator.
Checkout equipment of the present invention, comprising: test lung; Gas pressure sensor, is arranged in the 3rd gas passage being connected with test lung, and the gas pressure of the 3rd gas passage inside is detected; The first gas passage, one end is connected in the 3rd gas passage, and the other end is connected in the suction end of respirator; The second gas passage, one end is connected in the 3rd gas passage, and the other end is connected in the expiration end of respirator, wherein, is respectively arranged with the first air flow rate sensor and the second air flow rate sensor in the first gas passage and the second gas passage.By the present invention, solve when respirator is detected and can not carry out the problem of measuring in real time to air leakage and elementary streams, and then reached the effect better parameters of respirator being detected.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the fundamental diagram of the respiration detection equipment of correlation technique;
Fig. 2 is the schematic diagram that carries out breathing cycle detection and respirator s main working parameters detection principle according to the respiration detection equipment of correlation technique;
Fig. 3 is according to the common leak detection method schematic diagram of the respiration detection equipment of correlation technique;
Fig. 4 is according to the circulation path schematic diagram of elementary streams in the respirator work process of correlation technique;
Fig. 5 is the common elementary streams detection method of the respiration detection equipment schematic diagram according to correlation technique
Fig. 6 is according to the schematic diagram of the checkout equipment of the respirator of the embodiment of the present invention;
Fig. 7 is according to the flow chart of the detection method of the respirator of the embodiment of the present invention;
Fig. 8 is the schematic diagram that carries out breathing cycle detection and respirator s main working parameters detection principle according to the respiration detection equipment of the embodiment of the present invention.
Detailed description of the invention
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
According to embodiments of the invention, provide a kind of checkout equipment of respirator.
Fig. 6 is according to the schematic diagram of the checkout equipment of the respirator of the embodiment of the present invention.
As shown in Figure 6, the checkout equipment of this respirator comprises: test lung 10, under the control of respirator, carry out the air-breathing or operation of exhaling; Gas pressure sensor 8, is arranged in the 3rd gas passage 13 being connected with test lung 10, and the gas pressure of the 3rd gas passage 13 inside is detected; The first gas passage 11, one end is connected in the 3rd gas passage 13, and the other end is connected in the suction end 1 of respirator; The second gas passage 12, one end is connected in the 3rd gas passage 13, and the other end is connected in the expiration end 2 of respirator, wherein, is respectively arranged with the first air flow rate sensor 5 and the second air flow rate sensor 6 in the first gas passage 11 and the second gas passage 12.
By above-mentioned according to the checkout equipment of the respirator of the embodiment of the present invention, in respirator is operated in inspiratory duration section, when in to the first gas passage 11, the gas flow rate of input and output gas detects, if the gas in the second gas passage 12 also detects gas flow rate, illustrate at the expiration end of respirator and have gas leak phenomenon.Correspondingly, in respirator is operated in expiratory duration section, when in to the second gas passage 12, the gas flow rate of input and output gas detects, if the gas in the first gas passage 11 also detects gas flow rate, in the situation that getting rid of respirator output elementary streams, illustrate at the suction end of respirator and have gas leak phenomenon.Thereby, by technical scheme of the present invention, can be when respirator suction end and the end of exhaling to be carried out to normal detection, the while is detected the gas leakage situation of respirator in real time.
Based on same reason, correspondingly, also can detect in real time the gas leakage situation of test lung by technical scheme above.
Preferably, as shown in Figure 6, respirator suction end 1 is connected to the suction end 3 of checkout equipment, and the suction end 3 of checkout equipment is connected to inspiratory flow rate sensor 5, and inspiratory flow rate sensor 5 is connected to one end of Y-type three way type 7.Respirator expiration end 2 is connected to the expiration end 4 of checkout equipment, and the expiration end of checkout equipment is connected to exhalation flow rate sensor 6, and exhalation flow rate sensor 6 is connected to Y-type three way type 7 other ends.The 3rd end of Y-type three way type 7 is connected to airway pressure sensor 8, and airway pressure sensor is connected to the test lung port 9 of checkout equipment, and the test lung port 9 of checkout equipment is connected with test lung.
Fig. 7 is according to the flow chart of the detection method of the respirator of the embodiment of the present invention.
As shown in Figure 7, the method comprises:
Step S702, detects the air-breathing gas flow rate of respirator by the first air flow rate sensor 5;
Step S704, detects the expiration gas flow velocity of respirator by the second air flow rate sensor 6;
Step S706, by gas pressure sensor 8, the air-breathing gas pressure to respirator and expiration gas pressure detect respectively.
Preferably, at respirator, while being air-breathing, the first air flow rate sensor 5 detects the air-breathing gas flow rate of respirator, and gas pressure sensor 8 detects the air-breathing gas pressure of respirator; In the time that respirator is expiration, the second air flow rate sensor 6 detects the expiration gas flow velocity of respirator, and gas pressure sensor 8 detects the expiration gas pressure of respirator.
In embodiments of the invention, when respirator is in inspiratory phase, the flow velocity of the inspiratory flow rate sensor of flowing through is inspiratory flow rate, and exhalation flow rate sensor indicating value is zero.When respirator is during in expiratory phase, inspiratory flow rate sensor flow velocity is zero (or being elementary streams), and exhalation flow rate sensor flow velocity is exhalation flow rate.Like this, can carry out breathing cycle, inspiratory phase and expiratory phase by the situation of change of inspiratory flow rate and exhalation flow rate, hold one's breath, the identification of expiratory apnea, thereby realize the detection of respirator routine work parameter.
The embodiment of the present invention also provides a kind of detection system of respirator.
Comprise according to the detection system of the respirator of the embodiment of the present invention: respirator, has suction end 1 and the end 2 of exhaling; The checkout gear of respirator, is provided with: the first gas passage 11, be connected in suction end 1, and be wherein provided with the first air flow rate sensor 5; The second gas passage 12, is connected in the end 2 of exhaling, and is wherein provided with the second air flow rate sensor 6; Test lung 10 is carried out the air-breathing or operation of exhaling under the control of respirator; The 3rd gas passage 13, one end is connected with the first gas passage 11 and the second gas passage 12, and the other end is connected with test lung, is wherein provided with gas pressure sensor 8.
In the present invention, the first gas passage 11, the second gas passage 12 and the 3rd gas passage 13 form Y-type three way type.
Fig. 8 is the schematic diagram that carries out breathing cycle detection and respirator s main working parameters detection principle according to the respiration detection equipment of the embodiment of the present invention.
As shown in Figure 8, can find out by gas flow rate curve chart, the present invention can utilize two gas pressure sensors to come respectively exhalation flow rate and inspiratory flow rate to be detected.
In pressure in Fig. 8 and current curve figure, along with the generation of inspiratory flow rate, pressure of inspiration(Pi) progressively rises with inspiratory duration, reaches inspiration peak pressure Ppeak; Secondly, inspiratory flow rate makes zero, and enters the phase of holding one's breath, and pressure of inspiration(Pi) is now stable gradually, forms platform and presses Pplat; In the whole inspiratory duration section that comprises the phase of holding one's breath, exhalation flow rate is zero; Afterwards, air-breathing end, exhales and starts, and forms exhalation flow rate, and airway pressure declines rapidly, if when respirator is exported elementary streams, inspiratory flow rate is now elementary streams, otherwise inspiratory flow rate is now zero; Finish when exhaling, but air-breathing while not yet starting, enter the expiratory apnea phase, if when respirator output elementary streams, exhalation flow rate is now elementary streams, otherwise exhalation flow rate is now zero, breath pressure is now end expiratory positive pressure (Positive End Expiratory Pressure, referred to as PEEP).
Elementary streams method for real-time measurement: when respirator is in expiratory duration section, the passage that eliminating respiratory air flow is flowed through exists in the situation of leaking, and inspiratory flow rate sensor real-time flow rate is elementary streams real-time flow rate.
Preferably, the passage of flowing through at respiratory air flow exists and leaks, inspiratory flow rate sensor real-time flow rate adds that the real-time flow rate of leakage current is elementary streams real-time flow rate.
Gas leakage situation method for real-time measurement: when respirator is during in inspiratory phase, if exhalation flow rate sensor has flow velocity, there is gas leakage in respirator expiration loop; When respirator is not in expiratory phase but within the expiratory apnea phase, and respirator do not export in the situation of elementary streams, if inspiratory flow rate sensor has reverse flow, there is gas leakage in the air-breathing loop of respirator; When respirator be operated in expiratory phase and within the expiratory apnea phase and output elementary streams, if exhalation flow rate sensor values is significantly less than inspiratory flow rate sensor values, test lung has gas leakage.By said method, not only can detect in real time gas leakage state, also can locate the position that gas leakage occurs, and characterize the size of air leakage with gas leakage flow velocity and working flow rate.
As can be seen from the above description, the present invention can, when the parameters such as the gas flow rate to respirator detect, realize the real-time detection to respirator air leakage and elementary streams.
The present invention can measure air leakage and elementary streams in real time.Air leakage detects in real time, and the Stability and veracity of judging respirator (in noinvasive ventilation or children's's ventilation situation) output services parameter in gas leakage situation is had to very important meaning.Meanwhile, in detection respirator routine work parameter, detect in real time elementary streams, be conducive to respirator manufacturer in the time of debugging and inspection respirator, guarantee the accurate and stable of relevant parameter.
Detection method of the present invention, can realize in detecting the conventional output parameter of respirator, detects in real time elementary streams and respirator gas leakage situation.And the Gas leak position in respirator work and air leakage are quantized.Thereby be conducive to assessment and analysis respirator and ensure the ability of accurate output parameter under gas leakage condition.This is to debugging and detect respirator gas leakage compensate function and a bit very important meaning of running parameter.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.