CN214252297U - Exhaled gas nitric oxide detector - Google Patents
Exhaled gas nitric oxide detector Download PDFInfo
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- CN214252297U CN214252297U CN202022968390.5U CN202022968390U CN214252297U CN 214252297 U CN214252297 U CN 214252297U CN 202022968390 U CN202022968390 U CN 202022968390U CN 214252297 U CN214252297 U CN 214252297U
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Abstract
The utility model provides an expired air nitric oxide detector, which comprises an exhalation device; the detection gas circuit is communicated with the exhalation device through an exhalation pipe and is used for circulating and detecting the concentration of nitric oxide of the gas to be detected; a zero setting gas circuit for realizing gas zero setting; the circuit part is used for controlling the starting and stopping of the detection gas circuit and the zero setting gas circuit, the on-off of a path and the control of filtering amplification, analysis and data transmission; the display screen also comprises a power supply and a display screen. The utility model discloses can the automatic switch-over zero setting gas circuit with detect the gas circuit, realize the nitric oxide concentration detection, show the detection precision and the detection efficiency who have improved nitric oxide.
Description
Technical Field
The utility model relates to the technical field of medical equipment, more specifically say, relate to an expired gas nitric oxide detector.
Background
Exhaled nitric oxide (FeNO) is considered a sensitive indicator of eosinophilic inflammation in the airways and methods for detecting FeNO have been applied to assess and predict patient response to anti-inflammatory therapy, as well as to monitor patient compliance. Currently, three main detectors, namely a chemiluminescence detector, an electrochemical detector and a laser detector, are used for detecting FeNO.
At present, most of electrochemical nitric oxide detectors on the market are single gas circuit detection, a zero return gas circuit is lacked, the detectors need to be restarted or the zero return is carried out in a NO-free environment, and when Chinese angelica is inaccurate, the measurement precision of the nitric oxide detectors is extremely easy to influence. As the FeNO concentration of the children is less than 20ppb and belongs to normal level, 20-35ppb and severe inflammation in clinical tests; the adult FeNO concentration is less than 25ppb and belongs to a normal level, 25-50ppb and >50ppb belong to mild inflammation, and the adult FeNO concentration is more than 50ppb and belongs to severe inflammation, so that the requirement on the detection accuracy of a medical exhaled gas nitric oxide detector is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an expired gas nitric oxide detector, this expired gas nitric oxide detector provide two gas circuit detection mode, have improved the detection precision of nitric oxide detector.
The utility model provides an expired air nitric oxide detector, which comprises an exhalation device;
the detection gas circuit is communicated with the exhalation device through an exhalation pipe;
the zero setting gas circuit is used for realizing gas zero setting;
the detection gas circuit and the zero setting gas circuit realize automatic switching through a valve assembly;
the circuit part is electrically connected with the detection gas circuit and the zero setting gas circuit to control the start and stop of the detection gas circuit and the zero setting gas circuit, the on-off of a path and the control of filtering amplification, analysis and data transmission;
the display screen is in communication connection with the circuit part to display the measurement data;
and the power supply is used for supplying power to the detection gas circuit, the zero setting gas circuit, the circuit part and the display screen.
Preferably, the exhalation device includes disposable to the mouth, be used for filtering disposable filter of bacterium and aqueous vapor and be used for getting rid of the handle of breathing in of nitric oxide, the bottom of handle of breathing in is equipped with a plurality of suction holes, the inside of handle of breathing in is equipped with zero pressure check valve and fills and is filled with the oxide.
Preferably, the disposable filter comprises an upper cover, a lower cover and a filter membrane made of three layers of hydrophobic material of polyolefin electret synthetic fibers.
Preferably, the disposable mouth-aligning handle and the air suction handle are connected with the disposable filter in a plugging mode.
Preferably, detect the gas circuit and include first three-way valve, second three-way valve, air pump, drying tube and the nitric oxide sensor that connects gradually through the trachea, expiration device with connect gaseous apotheca through the trachea between the first three-way valve, expiration device with install on the trachea between the first three-way valve and be used for controlling the pipe holder of gaseous apotheca break-make.
Preferably, the zero setting gas circuit comprises a nitric oxide removing chamber, the first three-way valve, the second three-way valve, the gas pump, the drying pipe and the nitric oxide sensor which are sequentially connected through a pipeline, and the nitric oxide removing chamber is provided with a gas inlet communicated with the outside; the nitric oxide removing chamber is filled with potassium permanganate.
Preferably, the circuit part comprises a filtering and amplifying circuit, a data analysis and processing circuit, a data transmission circuit and a control circuit, wherein the filtering and amplifying circuit consists of three nitric oxide electrochemical sensor filtering and amplifying circuits which are connected in parallel and a filtering and amplifying circuit on a main circuit; the circuit part is respectively and electrically connected with the pipe clamp, the first three-way valve, the air pump, the nitric oxide sensor and the display screen.
Preferably, a constant flow valve is installed between the exhalation device and the detection gas circuit, the constant flow valve is respectively connected with a first air pressure detection sensor and a second air pressure detection sensor through a gas pipe, and the circuit part is connected with the first air pressure detection sensor, the second air pressure detection sensor and the second three-way valve.
Preferably, the nitric oxide sensor is three nitric oxide electrochemical sensors connected in parallel.
Preferably, the gas storage chamber is formed by spirally folding the gas storage tube into a spiral cube.
Compared with the prior art, the utility model provides an exhalation gas nitric oxide detector, detect the gas circuit including exhalation device, zero setting gas circuit, circuit portion, display screen and power, wherein, exhalation device, detection gas circuit and zero setting gas circuit constitute gas collection portion, detect the nitric oxide concentration that the gas circuit is used for circulating and detecting the gas that awaits measuring, and the zero setting gas circuit is used for realizing detecting system zero setting, detects the gas circuit and realizes automatic switch through the valve member with zero setting. The automatic switching of the zero setting air circuit and the detection air circuit can be realized through the valve component connected with the circuit part and the built-in automatic coding program, and the detection mode of double air circuits is realized, specifically, before the test, a tester exhales to the exhalation device, and the detection of the flow velocity and flow of the exhaled air is realized through the detection air circuit, the circuit part and the display screen, so that the system reaches a response value; when the zero setting is carried out, external environment gas enters the inside of the detector, gas zero setting is carried out through the zero setting gas circuit, then, the detection of nitric oxide concentration of gas to be detected is realized through the detection gas circuit, and electric signals obtained through detection are transmitted to the display screen to be visualized after filtering amplification, analysis processing and data conversion of the circuit part, so that the detection precision of the detector can be effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 and 2 are schematic views of an exhaled nitric oxide detector according to the present invention.
The device comprises a disposable mouth, a disposable filter, an air suction handle, a 4-constant flow valve, a 5-pipe clamp, a 6-first air pressure detection sensor, a 7-first three-way valve, an 8-second three-way valve, a 9-air pump, a 10-drying pipe, an 11-nitric oxide sensor, a 12-circuit part, a 13-second air pressure detection sensor, a 14-power supply, a 15-air storage chamber, a 16-nitric oxide removal chamber and a 17-display screen, wherein the disposable mouth is matched with the disposable filter, the 3-air suction handle is matched with the air suction handle, the 4-constant flow valve is matched with the air suction handle, the 6-first air pressure detection sensor, the 7-first three-way valve, the 8-second three-way valve, the 9-air pump, the 10-drying pipe, the 11-nitric oxide sensor, the 12-circuit part, the 13-second air pressure detection sensor, the 14-power supply, the 15-air storage chamber, the 16-nitric oxide removal chamber and the 17-display screen.
Detailed Description
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 and 2, fig. 1 and 2 are schematic structural views of an exhaled nitric oxide detector according to the present invention.
The utility model provides an expired gas nitric oxide detector mainly includes expiratory device, detects the gas circuit, the gas circuit of zeroing, valve member, circuit portion 12, display screen 17 and power 14, and above-mentioned each part is installed in the casing.
Wherein, expiratory device is used for supplying the user to blow gas to the mouth, detects the gas circuit and is linked together through expiratory tube with expiratory device, detects the nitric oxide concentration that the gas circuit is used for circulating and detecting the gas that awaits measuring, and the zero setting gas circuit passes through the trachea and detects the gas circuit and link to each other, and the gas zero setting can be realized to the zero setting gas circuit, realizes the autonomic switching of detecting gas circuit and zero setting gas circuit through the valve member under the control of built-in coding procedure.
The circuit part 12 is electrically connected with the detection gas circuit, the zero setting gas circuit and the display screen 17, and is used for testing the flow speed and the flow of the exhaled gas so as to enable the system to reach a stable value and control the automatic high-precision detection of the gas zero setting and the exhaled nitric oxide concentration during detection.
The detection air passage, the zero setting air passage, the circuit part 12 and the display screen 17 are all powered by a power supply 14.
During testing, external environment gas enters the zero setting gas circuit, and nitric oxide gas in the air is removed through the zero setting gas circuit, so that zero setting gas without nitric oxide is obtained; moreover, by blowing air to the exhalation device, the air is subjected to system zero setting through the zero setting air passage, so that the accuracy of a subsequent test result is ensured; the gas to be detected realizes the automatic detection of the nitric oxide concentration of the exhaled gas to be detected through the detection gas circuit and the circuit part. In the test process, the valve assembly connected with the circuit part and the built-in self-encoding program can realize the self-switching of the zero setting air circuit and the detection air circuit, thereby realizing the double-air-circuit detection.
The exhalation system includes a disposable mouthpiece 1, a disposable filter 2 and an inhalation handle 3.
Disposable 1 is preferably chooseed for use the material and is polypropylene and for the aseptic blow gun of medical grade, and when the tester blows to disposable 1, the bacterium and the aqueous vapor in the gas are filtered to gas process disposable filter 4, and the nitric oxide in the gas is got rid of again through the handle 3 of breathing in.
The disposable filter 2 is used for filtering bacteria and moisture.
In addition, the air suction handle 3 is connected with the zero setting air passage and the detection air passage, and the disposable nozzle 1, the disposable filter 2 and the air suction handle 3 are sequentially connected. The bottom of the air suction handle 3 is provided with a plurality of air suction holes, the inside of the air suction handle 3 is provided with a zero-pressure one-way valve and is filled with oxide, and when gas enters the air suction handle 3, the oxide oxidizes the nitric oxide in the gas into nitrogen dioxide, so that zero-adjusting gas without nitric oxide is obtained, and the accuracy of a test result of a detection link is ensured.
In addition, the disposable filter 2 comprises an upper cover, a lower cover and a filter membrane, wherein the filter membrane is made of three layers of hydrophobic materials of polyolefin electret synthetic fibers, an installation cavity is formed in the upper cover and the lower cover after the upper cover and the lower cover are covered, the filter membrane is arranged in the installation cavity, bacteria and water vapor are filtered by the filter membrane, and repeated tests can be realized by replacing the filter membrane.
During the installation, once only equal with the internal diameter of disposable filter 2 upper end to the external diameter of 1 lower extreme of mouth, just insert disposable filter 2 upper end to the mouth, the internal diameter at the handle 3 top of breathing in equals with the external diameter of disposable filter 2's lower extreme, and once only to mouth 1, the handle 3 of breathing in can be through plug mode and disposable filter 2 plug-in connection, and the three also can threaded connection, during the test, realizes gaseous prefiltration through exhaling device.
In an embodiment, the detection gas path includes a first three-way valve 7, a second three-way valve 8, a gas pump 9, a drying tube 10 and a nitric oxide sensor 11 sequentially connected through a gas tube, a gas storage chamber 15 and a tube holder 5 are further disposed between the exhalation device and the first three-way valve 7, and a circuit portion 12 is respectively connected to the constant flow valve 4, the tube holder 5, the first three-way valve 7, the gas pump 9 and the nitric oxide sensor 11.
In addition, the zero setting gas circuit comprises a nitric oxide removing chamber 16, a first three-way valve 7, a second three-way valve 8, an air pump 9, a drying pipe 10 and a nitric oxide sensor 11 which are sequentially connected through pipelines, the nitric oxide removing chamber 16 is provided with an air inlet communicated with the outside, and the nitric oxide removing chamber 16 is filled with potassium permanganate.
The nitric oxide sensor 11 preferably comprises three sensors connected in parallel by a circuit as a nitric oxide detection module. The gas storage chamber 15 is formed by folding a 2m long gas storage tube; the diameter of the gas storage pipe is 1 cm. The drying tube 10 is a thin tube having a length of 30cm and a diameter of 0.2cm, and contains a drying agent.
In addition, the circuit part 12 comprises a filter amplifying circuit, a data analysis processing circuit, a data transmission circuit and a control circuit, the filter amplifying circuit is composed of three nitric oxide electrochemical sensor filter amplifying circuits which are connected in parallel and a filter amplifying circuit on a main circuit, and the circuit part 12 is respectively and electrically connected with the pipe clamping device 5, the first three-way valve 7, the air pump 9, the nitric oxide sensor 11 and the display screen 17.
In the expiration test process before the test, the expired gas flows through the constant flow valve 4, the second three-way valve 8 and the drying pipe 10 and reaches the nitric oxide sensor 11 to be subjected to flow rate and flow detection, a tester can perform expiration preliminary detection in the process, the tester deeply inhales a breath, the breath is blown to the opposite nozzle according to certain flow rate and flow, whether a response value is achieved through monitoring is judged, the detection can be performed after the preliminary detection is successful until the system achieves the response value, and the aim is to stabilize the nitric oxide sensor 11. After the test, the circuit part 12 controls the air pump 9 to start, controls the first three-way valve 7 to communicate with the nitric oxide removing chamber 16, and at the moment, the outside air enters the nitric oxide removing chamber 16 through the air inlet, and after nitric oxide in the air is oxidized by potassium permanganate, the zero-setting gas without nitric oxide is obtained. The zero-setting gas flows through the nitric oxide sensor 11 under the pressure of the air pump 9 through the first three-way valve 7, the second three-way valve 8 and the drying pipe 10 to be detected, and the nitric oxide sensor 11 transmits the detection result to the microprocessor of the circuit part 12 to be used as a zero-setting electric signal.
After zero setting is finished, during formal detection, the circuit part 12 opens the pipe clamp 5, gas to be detected is collected into the gas storage chamber 15, the circuit part 12 controls the first three-way valve 7 to be communicated with the gas storage chamber 15, the gas to be detected is pumped into the drying pipe 10 by the air pump 9, the dried gas to be detected enters the nitric oxide sensor 11 for detection, respective electric signals of the three nitric oxide sensors 11 firstly pass through respective filter amplifying circuits and are converged into electric signals of a main trunk circuit, the electric signals are filtered and amplified by the filter amplifying circuits, and then are processed by the data analysis processing circuit, the electric signals are converted into data signals by an A/D (analog to digital) converter in the data analysis processing circuit, and the data signals are transmitted to the display screen 17 through the data transmission circuit for display.
On the basis of the above embodiment, the constant flow valve 4 may be installed between the exhalation apparatus and the detection air path, the constant flow valve 4 is connected to the first air pressure detection sensor 6 and the second air pressure detection sensor 13 through the air tube, and the circuit portion 12 is connected to the first air pressure detection sensor 6, the second air pressure detection sensor 13, and the second three-way valve 8.
The filtered exhaled gas flows through the constant flow valve 4 through the exhalation tube, at the moment, the gas to be detected is detected by the first air pressure detection sensor 6, the detected electric signal is processed by the filtering amplification circuit and then transmitted to the microprocessor in the data analysis processing circuit, the tube clamping device 5 is started after the analysis of the microprocessor, the gas to be detected enters the gas storage chamber 15, meanwhile, the gas to be detected is detected by the second air pressure detection sensor 13, the electric signal is transmitted to the microprocessor, and the valve of the constant flow valve 4 is adjusted in real time after the analysis of the microprocessor, so that the gas volume blown out by each detector in the same time is the same. It can be seen that, in the present embodiment, the constant flow valve 4 and the air pressure detection sensor cooperate to allow the exhaled air to flow into the air storage chamber 15 at a constant flow rate, thereby achieving a flow stabilizing effect.
Preferably, the gas storage chamber 15 is formed by spirally folding a gas storage tube into a spiral cube.
The utility model provides an expiratory gas nitric oxide detector's work flow does: installing a disposable nozzle 1 and a disposable filter 2, and starting a detector; carrying out an expiration test, wherein expired gas passes through the constant flow valve 4, the second three-way valve 8 and the drying pipe 10 and reaches the nitric oxide sensor 11 for detection until the system reaches a response value; the tester inhales air firstly, the air enters through an air inhaling hole at the bottom of the air inhaling handle 3, and nitric oxide in the air is oxidized into nitrogen dioxide by oxide in the air inhaling handle 3 so as to remove the nitric oxide in the air; blowing air towards the disposable mouthpiece 1, and removing moisture, bacteria and the like in the exhaled air through a filter membrane of the disposable filter 2 by the exhaled air to be detected; filtered gas enters the constant flow valve 4, the first gas pressure detection sensor 6 detects the gas pressure of the filtered gas in the constant flow valve 4, when a preset gas pressure value is reached, the circuit part 12 opens the pipe clamp 5, and the gas enters the gas storage chamber 15 for storage; meanwhile, the second air pressure detection sensor 13 detects air synchronously, and the circuit part 12 adjusts the valve opening of the constant flow valve 4 according to the air pressure value, so that the constant flow control of the air is realized. Thereafter, system zeroing and nitric oxide detection of the gas to be measured are achieved under the control of the air pump 9.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The exhaled nitric oxide detector provided by the present invention is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. An exhaled nitric oxide detector, comprising:
an exhalation device;
the detection gas circuit is communicated with the exhalation device through an exhalation pipe and is used for circulating and detecting the concentration of nitric oxide in the gas to be detected;
the zero setting gas circuit is used for realizing gas zero setting;
the detection gas circuit and the zero setting gas circuit realize automatic switching through a valve assembly;
the circuit part (12) is electrically connected with the detection gas circuit and the zero setting gas circuit to control the start and stop of the detection gas circuit and the zero setting gas circuit, the on-off of a path and the control of filtering amplification, analysis and data transmission;
the display screen (17) is in communication connection with the circuit part (12) to display the measurement data;
and the power supply (14) is used for supplying power to the detection gas circuit, the zero setting gas circuit, the circuit part (12) and the display screen (17).
2. The exhaled nitric oxide detector of claim 1, wherein the exhalation system comprises a disposable mouthpiece (1), a disposable filter (2) for filtering bacteria and water vapor, and an inhalation handle (3) for removing nitric oxide, the bottom of the inhalation handle (3) is provided with several inhalation holes, and the inside of the inhalation handle (3) is provided with a zero-pressure one-way valve and filled with oxide.
3. The exhaled nitric oxide detector according to claim 2, wherein said disposable filter (2) comprises an upper cover, a lower cover and a filter membrane made of three layers of hydrophobic material of poly (alkene electret synthetic fibers).
4. The exhaled nitric oxide detector according to claim 3, wherein the disposable mouthpiece (1) and the inhalation handle (3) are connected to the disposable filter (2) by plugging.
5. The exhaled nitric oxide detector of claim 1, wherein the detection gas path comprises a first three-way valve (7), a second three-way valve (8), a gas pump (9), a drying tube (10) and a nitric oxide sensor (11) which are connected in sequence through a gas tube, a gas storage chamber (15) is connected between the exhalation device and the first three-way valve (7) through a gas tube, and a tube clamp (5) for controlling the on-off of the gas storage chamber (15) is installed on the gas tube between the exhalation device and the first three-way valve (7).
6. The exhaled nitric oxide detector according to claim 5, wherein the zero-setting gas circuit comprises a nitric oxide removing chamber (16), the first three-way valve (7), the second three-way valve (8), the gas pump (9), the drying tube (10) and the nitric oxide sensor (11) which are connected in sequence through a pipeline, and the nitric oxide removing chamber (16) is provided with an air inlet communicated with the outside; the nitric oxide removing chamber (16) is filled with potassium permanganate.
7. The exhaled nitric oxide detector according to claim 6, wherein the circuit part (12) comprises a filter amplifier circuit, a data analysis and processing circuit, a data transmission circuit and a control circuit, wherein the filter amplifier circuit comprises three nitric oxide electrochemical sensor filter amplifier circuits connected in parallel and a filter amplifier circuit on a main circuit; the circuit part (12) is electrically connected with the pipe clamp (5), the first three-way valve (7), the air pump (9), the nitric oxide sensor (11) and the display screen (17) respectively.
8. The exhaled nitric oxide detector according to any one of claims 5 to 7, wherein a constant flow valve (4) is installed between the exhalation device and the detection gas path, the constant flow valve (4) is connected to a first air pressure detection sensor and a second air pressure detection sensor through gas tubes, respectively, and the circuit portion is connected to the first air pressure detection sensor, the second air pressure detection sensor and the second three-way valve (8).
9. The exhaled nitric oxide detector according to claim 5, wherein said nitric oxide sensor (11) is three nitric oxide electrochemical sensors in parallel.
10. The exhaled nitric oxide detector of claim 5, wherein the gas storage chamber (15) is formed by a gas storage tube that is spirally folded to form a spiral cube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022968390.5U CN214252297U (en) | 2020-12-11 | 2020-12-11 | Exhaled gas nitric oxide detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022968390.5U CN214252297U (en) | 2020-12-11 | 2020-12-11 | Exhaled gas nitric oxide detector |
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| Publication Number | Publication Date |
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| CN214252297U true CN214252297U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022968390.5U Active CN214252297U (en) | 2020-12-11 | 2020-12-11 | Exhaled gas nitric oxide detector |
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| CN (1) | CN214252297U (en) |
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