CN113974606B - A detection system for lung diffusion function - Google Patents
A detection system for lung diffusion function Download PDFInfo
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- CN113974606B CN113974606B CN202111271625.8A CN202111271625A CN113974606B CN 113974606 B CN113974606 B CN 113974606B CN 202111271625 A CN202111271625 A CN 202111271625A CN 113974606 B CN113974606 B CN 113974606B
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 210000004072 lung Anatomy 0.000 title claims abstract description 15
- 238000009792 diffusion process Methods 0.000 title abstract 4
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 238000005070 sampling Methods 0.000 claims abstract description 43
- 239000006185 dispersion Substances 0.000 claims description 37
- 230000002685 pulmonary effect Effects 0.000 claims description 19
- 238000009499 grossing Methods 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 25
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 15
- 230000004199 lung function Effects 0.000 abstract description 6
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 171
- 230000006870 function Effects 0.000 description 18
- 230000008569 process Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 210000002469 basement membrane Anatomy 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 210000000214 mouth Anatomy 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 102000001554 Hemoglobins Human genes 0.000 description 2
- 108010054147 Hemoglobins Proteins 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 210000001601 blood-air barrier Anatomy 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 210000002381 plasma Anatomy 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 206010006322 Breath holding Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 210000002821 alveolar epithelial cell Anatomy 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 210000002808 connective tissue Anatomy 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 210000003989 endothelium vascular Anatomy 0.000 description 1
- 210000003743 erythrocyte Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003928 nasal cavity Anatomy 0.000 description 1
- 210000001331 nose Anatomy 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000009325 pulmonary function Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 210000003019 respiratory muscle Anatomy 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003797 telogen phase Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Measuring devices for evaluating the respiratory organs
- A61B5/082—Evaluation by breath analysis, e.g. determination of the chemical composition of exhaled breath
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Measuring devices for evaluating the respiratory organs
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- Pulmonology (AREA)
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- Physiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
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- General Health & Medical Sciences (AREA)
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- Investigating Or Analysing Biological Materials (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
本发明涉及一种用于肺弥散功能的检测系统，包括供气元件、控制器、连接供气元件出口端的主气路以及标定测试气体和检测呼出气体的气体分析仪，所述供气元件的出口端连通有接入主气路的第一阀，所述主气路背离供气元件的一侧依次连通有第一流量计和咬嘴，本发明采用主气路、第一辅助气路、第二辅助气路、第三辅助气路和采样管配合，连通供气元件、气体分析仪、气泵、流量计，并通过控制器控制各个阀进行自动启闭，相较于现有的肺功能检测设备，本发明以一口气呼吸法为基础，提供用于肺一氧化碳弥散功能的检测系统，能够更加准确地检测受试者的肺功能基本指标，尤其是提高了肺弥散功能的检测准确性。
The present invention relates to a detection system for lung diffusion function, comprising an air supply element, a controller, a main air circuit connected to the outlet end of the air supply element, and a gas analyzer for calibrating test gas and detecting exhaled gas. The outlet end of the air supply element is connected to a first valve connected to the main air circuit, and the side of the main air circuit away from the air supply element is connected to a first flow meter and a mouthpiece in sequence. The present invention adopts the main air circuit, the first auxiliary air circuit, the second auxiliary air circuit, the third auxiliary air circuit and a sampling tube to connect the air supply element, the gas analyzer, the air pump, and the flow meter, and controls each valve to be automatically opened and closed by the controller. Compared with the existing lung function detection equipment, the present invention is based on the one-breath breathing method to provide a detection system for lung carbon monoxide diffusion function, which can more accurately detect the basic indicators of lung function of the subject, especially improve the detection accuracy of lung diffusion function.
Description
Technical Field
The invention relates to the technical field of medical detection equipment, in particular to a detection system for a lung dispersion function.
Background
Pulmonary dispersion function refers to the ability of some alveolar gas to diffuse from the alveoli to the capillaries through the alveolar-capillary membrane (consisting of the alveolar epithelium and its basement membrane, the alveolar capillary endothelium and its basement membrane, and connective tissue between 2 basement membranes) to the blood and bind to hemoglobin (Hb) in erythrocytes. The gases exchanged in the alveolar-capillary membrane are mainly oxygen (O 2) and carbon dioxide (CO 2). The method is complex, the binding force of carbon monoxide (CO) and hemoglobin is 210 times greater than that of oxygen (O 2), the oxygen partial pressure in physiological range is not a main interference factor, besides a large number of smokers, the content of carbon monoxide (CO) in normal human blood plasma is almost zero, so that the intake of carbon monoxide (CO) in examination is calculated conveniently, and carbon monoxide (CO) is rarely dissolved in blood plasma in the transportation process, so that carbon monoxide (CO) becomes ideal gas for measuring the dispersing function of the lung.
In 1915, krogh first proposed measuring the pulmonary dispersion (D L CO) with carbon monoxide (CO) according to the dispersion principle. There are many different methods for examining pulmonary dispersion function using carbon monoxide (CO), including a breath-taking method, a carbon monoxide intake method, a constant state method, a repeated breathing method, and a recently developed internal respiration method which is simple to operate and does not require breath-holding, but the respiratory method of one-breath-taking pulmonary carbon monoxide (CO) dispersion function (D LCO single-breath method,DL CO-sb) established by Ogilvie and the like is most commonly used.
In the prior art, the lung function detection device mainly comprises a lung meter, a gas analyzer and a pressure meter, can overstep most indexes of the lung function, such as lung capacity, ventilation, dispersion, respiratory muscle strength, oxygen consumption, carbon dioxide production and the like, has a simple structure, can only detect common indexes of the lung function, can not accurately detect D L CO, can not realize automatic sampling volume adjustment, and can not accurately detect D L CO of children with VC less than 1L or patients with severe restriction diseases;
In addition, the existing equipment needs to perform zero point correction on the gas analyzer and manually calibrate the calibration cylinder after the gas analyzer is started every week and before every human inspection after the D L CO inspection is suspected to be problematic, so that the normal volume or flow test of the pulmonary function instrument is determined and ensured, the manual operation is complicated, the use is inconvenient, the calibration misalignment is easy to occur, the detection data is inaccurate, the detection efficiency is low, and the equipment is unfavorable for operators and patients. Therefore, to solve the above-mentioned problems, a detection system for pulmonary dispersion function is now proposed.
Disclosure of Invention
The invention aims to provide a detection system for a lung dispersion function, which solves the problems that in the prior art, a lung function detection device cannot accurately detect D L CO, automatic sampling volume adjustment cannot be realized, use is limited, manual operation is complex, and use is inconvenient.
In order to achieve the purpose, the invention provides the technical scheme that the detection system for the lung dispersion function comprises a gas supply element, a controller, a main gas channel connected with the outlet end of the gas supply element, and a gas analyzer for calibrating test gas and detecting exhaled gas, wherein the outlet end of the gas supply element is communicated with a first valve connected with the main gas channel, one side of the main gas channel, which is away from the gas supply element, is sequentially communicated with a first flowmeter and a mouthpiece, a branch of the main gas channel is provided with a first auxiliary gas channel, a second auxiliary gas channel and a third auxiliary gas channel which are positioned between the first valve and the first flowmeter, one end of the first auxiliary gas channel, which is close to the main gas channel, is connected with a second valve, the tail ends of the second auxiliary gas channel and the third auxiliary gas channel are respectively communicated with a sixth valve and a pressure sensor, the inlet end of the gas analyzer is communicated with a sampling tube, and the outlet end of the gas analyzer is communicated with an air pump, the controller is connected with the fourth valve, the fourth valve and the air analyzer.
Preferably, one end of the sampling tube, which is away from the gas analyzer, is spliced with the outlet end of the first auxiliary gas circuit.
Preferably, one end of the sampling tube, which is away from the gas analyzer, is communicated with the main gas circuit at the inlet end or the outlet end of the first flowmeter.
Preferably, the gas analyzer further comprises a seventh valve communicated with the inlet end of the gas analyzer, the seventh valve is a three-position three-way electromagnetic valve, and the seventh valve is electrically connected with the controller.
Preferably, two ports of the seventh valve, which deviate from the gas analyzer, are both connected with the sampling pipe, one of the ports is connected with the first auxiliary gas circuit through the sampling pipe, and the other port is connected into the main gas circuit at the inlet end or the outlet end of the first flowmeter through the sampling pipe.
Preferably, the device further comprises a third valve communicated with the main gas path, wherein the third valve is a pressure relief valve, and the third valve is connected with a branch end of the main gas path between the first valve and the fourth valve.
Preferably, the outlet end of the air pump is communicated with a second flowmeter, and the second flowmeter is electrically connected with the controller.
Preferably, the first valve is a pressure reducing valve, the second valve is a three-position three-way electromagnetic valve, the fourth valve is a gas supply valve, the fifth valve is a one-way valve or an on-demand valve, and the sixth valve is a blocking valve.
Preferably, the system further comprises a noise reduction smoothing device, and the noise reduction smoothing device is connected to the main gas path between the fifth valve and the second auxiliary gas path.
Preferably, the noise reduction smoothing device is a pipeline with a built-in honeycomb net, and the honeycomb net is formed by a plurality of laminated stainless steel net sheets.
The invention has at least the following beneficial effects:
1. The invention adopts the main gas path, the first auxiliary gas path, the second auxiliary gas path, the third auxiliary gas path and the sampling pipe to cooperate, is communicated with the gas supply element, the gas analyzer, the gas pump and the flowmeter, and controls each valve to be opened and closed automatically through the controller;
2. According to the invention, the sampling passage of the gas analyzer is switched by the second valve, and the automatic sampling volume adjustment is realized by matching the air pump with the second flowmeter, so that the device is suitable for D L CO detection of children with VC less than 1L or patients with severe restriction diseases, the application range is wider, the controller is used for controlling the opening and closing of each valve, and the working matching of each component can automatically perform zero point calibration and test gas calibration, the manual frequent operation is not needed, the phenomenon of calibration misalignment caused by manual use of the calibration cylinder is effectively avoided, the calibration working operation before starting and testing is simpler and more convenient, and the test efficiency and accuracy of a subject are improved.
Drawings
FIG. 1 is a schematic diagram of the gas calibration state of the present invention;
FIG. 2 is a schematic view of a dispersion test state according to the present invention;
FIG. 3 is a schematic diagram of another embodiment of the present invention;
Fig. 4 is a schematic diagram of a controller connection in the present invention.
The reference numerals comprise 1, a gas supply element, 2, a main gas path, 3, a first auxiliary gas path, 4, a second auxiliary gas path, 5, a third auxiliary gas path, 6, a first valve, 7, a second valve, 8, a third valve, 9, a fourth valve, 10, a fifth valve, 11, a sixth valve, 12, a first flowmeter, 13, a mouthpiece, 14, a pressure sensor, 15, a gas analyzer, 16, a sampling pipe, 17, a seventh valve, 18, an air pump, 19, a second flowmeter, 20, a noise reduction smoothing device and 21, and a controller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, 2 and 4, the present invention provides a technical solution, a detection system for pulmonary dispersion function, including a gas supply element 1, a controller 21, a main gas path 2 connected to an outlet end of the gas supply element 1, and a gas analyzer 15 for calibrating test gas and detecting exhaled gas, specifically, the gas supply element 1 may be a gas source bottle or a compressed gas source device for providing test gas for pulmonary dispersion function detection, the outlet end of the gas supply element 1 is communicated with a first valve 6 connected to the main gas path 2, specifically, the first valve 6 is a pressure reducing valve for reducing pressure at the outlet of the gas supply element 1, so that the pressure of the main gas path 2 behind the first valve 6 is stable, and is opened when working, and closed when not working, one side of the main gas path 2 away from the gas supply element 1 is sequentially communicated with a first flowmeter 12 and a mouthpiece 13, specifically, the first flowmeter 12 is a flow sensor for measuring flow and volume value of a test stage of a subject, the mouthpiece 13 is a place where the oral cavity of the subject contacts with equipment, and the subject has the mouthpiece 13 to perform pulmonary dispersion function test;
The main air channel 2 is branched with a first auxiliary air channel 3, a second auxiliary air channel 4 and a third auxiliary air channel 5 which are positioned between a first valve 6 and a first flowmeter 12, specifically, the first auxiliary air channel 3, the second auxiliary air channel 4 and the third auxiliary air channel 5 are distributed on the main air channel 2 between the first valve 6 and the first flowmeter 12 and are distributed towards the direction away from the air supply element 1, one end of the first auxiliary air channel 3 close to the main air channel 2 is connected with a second valve 7, specifically, the second valve 7 is a three-position three-way electromagnetic valve, one inlet end of the second valve 7 is communicated with the first auxiliary air channel 3, the other inlet end of the second valve 7 is communicated with the outside air, when the air is marked, a port communicated with the outside air is opened, when the test gas is marked, the ports communicated with the first auxiliary air channel 3 are opened, and the rest phases are normally closed, the tail ends of the second auxiliary air channel 4 and the third auxiliary air channel 5 are respectively communicated with a sixth valve 11 and a pressure sensor 14, the sixth valve 11 is a blocking valve for cutting off the air channel from being communicated with the atmosphere, the air channel is closed in a dispersion test air suction and shielding stage, the other stages are opened, the pressure sensor 14 is used for measuring the oral pressure in the test stage, the oral pressure value in the shielding stage is usually focused, the oral pressure change in the dispersion test air shielding stage is not more than +/-3 kPa, the main air channel 2 between the first auxiliary air channel 3 and the second auxiliary air channel 4 is connected with a fourth valve 9 and a fifth valve 10, the fourth valve 9 is an air supply valve, the rest stages are normally closed when the air source is required to be sucked in the dispersion test stage, and the fifth valve 10 is a one-way valve, and is opened when the negative pressure exists in the main air channel 2, so that the air source passes;
the inlet end of the gas analyzer 15 is communicated with a sampling tube 16, and the sampling tube 16 is used for collecting test gas led out by the first auxiliary gas circuit 3 and exhaled gas of the mouthpiece 13;
In the gas calibration stage, one end of the sampling tube 16, which is away from the gas analyzer 15, is spliced with the outlet end of the first auxiliary gas channel 3, namely the outlet end of the second valve 7 can be communicated through the sampling tube 16, when the air zero point is calibrated, the second valve 7 is adjusted to the position where the outside air is communicated with the sampling tube 16, the gas analyzer 15 performs zero point calibration through the air, when the gas is tested, the second valve 7 is adjusted to the position where the first auxiliary gas channel 3 is communicated with the sampling tube 16, and the gas analyzer 15 performs test gas calibration on the gas supply element 1;
In the dispersion function test stage, one end of the sampling tube 16, which is far away from the gas analyzer 15, is communicated with the main gas channel 2 at the inlet end or the outlet end of the first flowmeter 12, specifically, the main gas channel 2 at the inlet end or the outlet end of the first flowmeter 12 is provided with a branch port and is spliced with one end of the sampling tube 16, which is far away from the gas analyzer 15, so that gas exhaled by a subject through the mouthpiece 13 is guided into the gas analyzer 15 through the sampling tube 16, and further the exhaled gas of the subject is tested by the gas analyzer 15;
The outlet end of the gas analyzer 15 is communicated with an air pump 18, specifically, the air pump 18 is a pump with adjustable rotation speed, and is used for pumping out the gas in the testing process through a gas path, and for realizing automatic sampling volume adjustment, the controller 21 is electrically connected with the second valve 7, the fourth valve 9, the sixth valve 11, the first flowmeter 12, the gas analyzer 15 and the air pump 18, and specifically, the controller 21 is used for centralized control of electrical elements.
Example 2
Referring to fig. 3 and 4, the present invention provides a technical solution, including a gas supply element 1, a controller 21, a main gas path 2 connected to an outlet end of the gas supply element 1, and a gas analyzer 15 for calibrating test gas and detecting exhaled gas, wherein the gas supply element 1 may be a gas source bottle or a compressed gas source device for providing test gas for detecting the pulmonary dispersion function, the outlet end of the gas supply element 1 is communicated with a first valve 6 connected to the main gas path 2, and the first valve 6 is a pressure reducing valve for reducing the pressure at the outlet of the gas supply element 1, so that the pressure of the main gas path 2 behind the first valve 6 is stable, and is opened when working and closed when not working;
The main air channel 2 is sequentially communicated with a first flowmeter 12 and a mouthpiece 13 at one side away from the air supply element 1, specifically, the first flowmeter 12 is a flow sensor and is used for measuring flow and volume values of a test stage of a subject, the mouthpiece 13 is a place where the oral cavity of the subject contacts equipment, the subject needs to mouthpiece 13 to perform a lung dispersion function test, the main air channel 2 is branched with a first auxiliary air channel 3, a second auxiliary air channel 4 and a third auxiliary air channel 5 which are positioned between the first valve 6 and the first flowmeter 12, specifically, the first auxiliary air channel 3, the second auxiliary air channel 4 and the third auxiliary air channel 5 are distributed on the main air channel 2 between the first valve 6 and the first flowmeter 12 and are distributed towards the direction away from the air supply element 1, the first auxiliary air channel 3 is connected with a second valve 7, specifically, the second valve 7 is a three-position three-way electromagnetic valve, one inlet end of the second valve 7 is communicated with the first auxiliary air channel 3, the other inlet end of the second valve 7 is communicated with the outside air, a port communicated with the outside air is opened when the air is marked, a port communicated with the first auxiliary air channel 3 is opened when the test gas is marked, the other phases are normally closed, the tail ends of the second auxiliary air channel 4 and the third auxiliary air channel 5 are respectively communicated with a sixth valve 11 and a pressure sensor 14, the sixth valve 11 is a blocking valve for cutting off the air channel from the atmosphere, the blocking valve is closed in the dispersion test inspiration and breath-hold phases, the other phases are opened, the pressure sensor 14 is used for measuring the oral pressure in the test phase, the oral pressure value in the breath-hold phase is usually focused, the change of the oral pressure is required to be not more than +/-3 kPa in the dispersion test breath-hold phase, the main air channel 2 between the first auxiliary air channel 3 and the second auxiliary air channel 4 is connected with the fourth valve 9 and the fifth valve 10, specifically, the fourth valve 9 is an air supply valve, and is opened when air source gas is required to be inhaled in the dispersion test stage, the rest stages are normally closed, the fifth valve 10 is a one-way valve, and the valve is automatically conducted when negative pressure exists in the main air passage 2, so that test gas passes through;
The inlet end of the gas analyzer 15 is communicated with a seventh valve 17, the seventh valve 17 is a three-position three-way electromagnetic valve, the seventh valve 17 is electrically connected with a controller 21, two ports of the seventh valve 17, which deviate from the gas analyzer 15, are both connected with a sampling tube 16, one port is connected with the outlet end of the second valve 7 through the sampling tube 16, the other port is connected into a main gas channel 2 at the inlet end or the outlet end of the first flowmeter 12 through the sampling tube 16, and specifically, the main gas channel 2 at the inlet end or the outlet end of the first flowmeter 12 is provided with a branch port communicated with the sampling tube 16, namely, the seventh valve 17 can be controlled by the controller 21 to select, open and close the gas channel and switch the gas channel;
Namely, in the gas calibration stage, the seventh valve 17 is adjusted to a position where the second valve 7 is communicated with the gas analyzer 15, when the air zero point calibration is performed, the second valve 7 is adjusted to a position where the outside air is communicated with the sampling tube 16, the air analyzer 15 performs zero point calibration through the air, and when the test gas calibration is performed, the second valve 7 is adjusted to a position where the first auxiliary gas path 3 is communicated with the sampling tube 16, and the gas analyzer 15 performs test gas calibration on the gas supply element 1;
In the dispersion function testing stage, the seventh valve 17 is adjusted to a position where the mouthpiece 13 is communicated with the gas analyzer 15, so that the gas exhaled by the subject through the mouthpiece 13 is led into the gas analyzer 15 through the sampling tube 16, and then the exhaled gas of the subject is tested by the gas analyzer 15;
The outlet end of the gas analyzer 15 is communicated with an air pump 18, specifically, the air pump 18 is a pump with adjustable rotation speed, and is used for pumping out the gas in the testing process through a gas path, and for realizing automatic sampling volume adjustment, the controller 21 is electrically connected with the second valve 7, the fourth valve 9, the sixth valve 11, the first flowmeter 12, the gas analyzer 15 and the air pump 18, and specifically, the controller 21 is used for centralized control of electrical elements.
Example 3
Referring to fig. 1 to 4, on the basis of embodiment 1 or 2, the difference is that:
The air supply device further comprises a third valve 8 communicated with the main air passage 2, the third valve 8 is a pressure relief valve, the third valve 8 is connected with a branch end of the main air passage 2 between the first valve 6 and the fourth valve 9, specifically, the main air passage 2 between the first valve 6 and the fourth valve 9 is provided with a branch port for installing the third valve 8, and when the pressure of the main air passage 2 is overlarge due to a certain reason (such as the failure of the first valve 6 or the pressure impact of the air supply element 1 passing through the first valve 6 is overlarge), part of the pressure is relieved by the third valve 8, so that the main air passage 2 is protected.
The outlet end of the air pump 18 is communicated with a second flowmeter 19, the second flowmeter 19 is electrically connected with the controller 21, specifically, the second flowmeter 19 is a small-range flow sensor, and is used for performing feedback control on the rotation speed of the air pump 18 or detecting whether the flow of the outlet of the air pump 18 is a value required by the gas analyzer 15, and the automatic sampling volume adjustment is realized by matching with the air pump 18, so that the requirement of stabilizing the flow rate of the gas analyzer in the gas analyzer 15 is ensured.
The device further comprises a noise reduction smoothing device 20, the noise reduction smoothing device 20 is connected to the main air channel 2 between the fifth valve 10 and the second auxiliary air channel 4, the noise reduction smoothing device 20 is a pipeline with a built-in honeycomb net, and specifically, the honeycomb net is formed by a plurality of laminated stainless steel net sheets, and can reduce noise and smooth air flow of air flow at the outlet end of the fifth valve 10 through the noise reduction smoothing device 20, namely, the air flow passing through the dense honeycomb net is dispersed smoothly, so that air flow impact is avoided, and air suction of a test process of a subject is influenced.
Working principle:
When in use, the controller 21 is connected with an upper computer (such as a computer) in a data way, and the data calculation result is analyzed by the upper computer, and the specific operation is as follows:
1. the working flow of the gas calibration stage is as follows:
when gas calibration is performed, the sampling tube 16 is connected to the outlet end of the second valve 7.
Starting calibration:
Step1, the test gas in the gas supply element 1 is led into the main gas path 2, the pressure at the outlet of the first valve 6 is kept stable, the second valve 7 is in a normally closed state, the third valve 8 is normally closed when the gas pressure in the main gas path 2 works normally, and the fourth valve 9 is closed. The second flowmeter 19, the air pump 18, and the gas analyzer 15 all start to operate. The fifth valve 10, the sixth valve 11, the first flowmeter 12 and the pressure sensor 14 are not operated.
Step2, the controller 21 controls the second valve 7 to be adjusted to a position where external air is communicated with the sampling tube 16, the gas analyzer 15 performs zero calibration after passing through air for a period of time, after the zero calibration is successful, the controller 21 controls the second valve 7 to repeatedly open and close the paths of the first auxiliary gas path 3 and the sampling tube 16, such as 5s, 3s, and the like, after a plurality of periods, the second valve 7 is closed, and the test gas in the gas supply element 1 is subjected to test gas calibration by the gas analyzer 15 when the valve 2 is opened.
And Step3, after the calibration is finished, the second flowmeter 19, the air pump 18 and the gas analyzer 15 stop working, the controller 21 uploads data, and the calibration result is analyzed by the upper computer.
2. Subject pulmonary dispersion function test procedure:
after the gas calibration is successful, when the pulmonary dispersion function test is performed, the sampling tube 16 is communicated with the branch port of the main gas circuit 2 at the outlet end or the inlet end of the first flowmeter 12.
Starting the test:
Step1, the test gas in the gas supply element 1 is led into the main gas path 2, the pressure at the outlet of the first valve 6 is kept stable, the second valve 7 is in a normally closed state, the third valve 8 is normally closed, the fourth valve 9 is closed when the gas pressure in the main gas path 2 works normally, the fifth valve 10 is not subjected to negative pressure, and therefore the valve is in a temporarily closed state, and the sixth valve 11 is in an open state. The pressure sensor 14, the first flowmeter 12, the second flowmeter 19, the air pump 18, and the gas analyzer 15 all start to operate.
Step2, normally, zero calibration is needed to be carried out on the gas analysis module at the beginning of the test, so after the gas analysis module is calibrated successfully for a period of time, the subject wears the nose clip and holds the mouthpiece 13 in mouth, the gas is guaranteed to only enter and exit from the mouthpiece, the gas does not enter and exit from the nasal cavity, calm breath (moisture breath) is started, after the moisture breath of the subject is stable, an operator guides the subject to inhale to the Total Lung (TLC) position, then exhale to the residual gas (RV) position, in the exhaling process, the operator operates the controller 21, the fourth valve 9 is opened, the controller 21 starts to detect the breathing condition of the subject (whether the subject exhales or is inhaling at the moment, whether the value is changed or not detected by the gas analyzer 15 for analysis, and the value change is exhaling, and the value is unchanged.
Step3, when the controller 21 detects the moment that the subject changes from exhaling to inhaling, the controller controls the sixth valve 11 to be closed, the fifth valve 10 is opened under the action of the negative pressure in the main gas path 2, and the subject inhales the test gas in the gas supply element 1.
Step4, the subject inhales the air to the total lung volume (TLC), when the controller 21 detects that the subject is inhaling end, the fourth valve 9 is closed, the air pump 18 stops working, and the controller 21 performs a 10 second breath-hold countdown period (the breath-hold time can be set before starting the test, and is usually 10 seconds).
Step5, after the controller 21 finishes counting down, the air pump 18 starts to work, the sixth valve 11 is opened, the subject is informed, and the subject exhales to the residual air position and then performs the inhalation action, and the test is finished.
Step6, the controller 21 can be operated manually to stop the test, and the pressure sensor 14, the first flowmeter 12, the second flowmeter 19, the air pump 18 and the gas analyzer 15 are closed and stopped when the test is finished. The controller 21 performs data analysis to obtain dispersion test results.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A detection system for a lung dispersion function is characterized by comprising a gas supply element (1), a controller (21), a main gas channel (2) connected with the outlet end of the gas supply element (1) and a gas analyzer (15) for calibrating test gas and detecting exhaled gas, wherein the outlet end of the gas supply element (1) is communicated with a first valve (6) connected with the main gas channel (2), one side of the main gas channel (2) deviating from the gas supply element (1) is sequentially communicated with a first flowmeter (12) and a mouthpiece (13), the main gas channel (2) is branched with a first auxiliary gas channel (3), a second auxiliary gas channel (4) and a third auxiliary gas channel (5) which are positioned between the first valve (6) and the first flowmeter (12), one end of the first auxiliary gas channel (3) close to the main gas channel (2) is connected with a second valve (7), the tail ends of the second auxiliary gas channel (4) and the third auxiliary gas channel (5) are respectively communicated with a sixth valve (11) and a pressure sensor (14), the first auxiliary gas channel (4) is connected with the fourth valve (9) between the first auxiliary gas channel (3) and the second auxiliary gas channel (4) is connected with the fourth valve (15), the sampling tube (16) is used for collecting test gas led out by the first auxiliary gas circuit (3) and exhaled gas of the mouthpiece (13), an air pump (18) is communicated with the outlet end of the gas analyzer (15), and the controller (21) is electrically connected with the second valve (7), the fourth valve (9), the sixth valve (11), the first flowmeter (12), the gas analyzer (15) and the air pump (18);
The first valve (6) is a pressure reducing valve, the second valve (7) is a three-position three-way electromagnetic valve, the fourth valve (9) is a gas supply valve, the fifth valve (10) is a one-way valve or an on-demand valve, and the sixth valve (11) is a blocking valve;
One inlet end of the second valve (7) is communicated with the first auxiliary air channel (3), the other inlet end of the second valve (7) is communicated with outside air, a port communicated with the outside air is opened when the air is marked, and a port communicated with the first auxiliary air channel (3) is opened when the test gas is marked;
when gas calibration is performed, the sampling tube (16) is connected with the outlet end of the second valve (7).
2. A detection system for pulmonary dispersion according to claim 1, characterized in that the end of the sampling tube (16) facing away from the gas analyzer (15) is plugged into the outlet end of the first auxiliary gas circuit (3).
3. A detection system for pulmonary dispersion according to claim 1, characterized in that the end of the sampling tube (16) facing away from the gas analyzer (15) communicates with the inlet or outlet end of the first flowmeter (12) in the main gas path (2).
4. The system for detecting pulmonary dispersion according to claim 1, further comprising a seventh valve (17) in communication with an inlet of the gas analyzer (15), wherein the seventh valve (17) is a three-position three-way solenoid valve, and wherein the seventh valve (17) is electrically connected to the controller (21).
5. A detection system for pulmonary dispersion according to claim 4, wherein the seventh valve (17) is connected to the sampling tube (16) at both ports facing away from the gas analyzer (15), one of said ports being connected to the first auxiliary gas circuit (3) via the sampling tube (16) and the other of said ports being connected to the main gas circuit (2) at the inlet or outlet end of the first flow meter (12) via the sampling tube (16).
6. The detection system for pulmonary dispersion according to claim 1, further comprising a third valve (8) in communication with the main air path (2), the third valve (8) being a pressure relief valve, the third valve (8) being connected to a branching end of the main air path (2) between the first valve (6) and the fourth valve (9).
7. A detection system for pulmonary dispersion according to claim 1, wherein the outlet end of the air pump (18) is connected to a second flowmeter (19), the second flowmeter (19) being electrically connected to the controller (21).
8. A detection system for pulmonary dispersion according to claim 1, further comprising a noise reduction smoothing device (20), the noise reduction smoothing device (20) being connected to the main air path (2) between the fifth valve (10) and the second auxiliary air path (4).
9. The system for detecting pulmonary dispersion according to claim 8, wherein the noise reduction smoothing device (20) is a pipeline with a built-in honeycomb net, and the honeycomb net is composed of a plurality of laminated stainless steel net sheets.
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| JP7756949B2 (en) * | 2024-02-26 | 2025-10-21 | チェスト株式会社 | Pulmonary function measuring device and calibration gas generation method |
| CN119745365B (en) * | 2024-12-26 | 2025-12-12 | 深圳市美好创亿医疗科技股份有限公司 | A lung diffusion testing device |
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