CN113974606A - Detection system for lung diffusion function - Google Patents
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- CN113974606A CN113974606A CN202111271625.8A CN202111271625A CN113974606A CN 113974606 A CN113974606 A CN 113974606A CN 202111271625 A CN202111271625 A CN 202111271625A CN 113974606 A CN113974606 A CN 113974606A
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- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
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Abstract
The invention relates to a detection system for a lung dispersion function, which comprises a gas supply element, a controller, a main gas path 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 into the main gas path, and one side of the main gas path, which is far away from the gas supply element, is sequentially communicated with a first flowmeter and a mouthpiece. Especially, the detection accuracy of the lung diffusion function is improved.
Description
Technical Field
The invention relates to the technical field of medical detection equipment, in particular to a detection system for lung diffusion function.
Background
The pulmonary dispersion function refers to the ability of some alveolar gas to diffuse from the alveoli to the capillaries through the alveolar-capillary membrane (composed of alveolar epithelium and basement membrane thereof, alveolar capillary endothelium and basement membrane thereof, and connective tissue between 2 basement membranes) and to bind to hemoglobin (Hb) in erythrocytes. The gas exchanged in the alveolar-capillary membrane is mainly oxygen (O)2) And carbon dioxide (CO)2). Due to the direct calculation of the oxygen dispersion requirementThe method for measuring the average partial pressure of the blood oxygen of the pulmonary capillary is complex; and the binding force of carbon monoxide (CO) to hemoglobin is stronger than that of oxygen (O)2) 210 times greater, oxygen partial pressure in the physiological range is not a major interference factor; except for a large number of smokers, the content of carbon monoxide (CO) in the blood plasma of normal people is almost zero, so that the carbon monoxide (CO) intake in the inspection can be calculated conveniently; carbon monoxide (CO) is also rarely dissolved in plasma during transport, and therefore is an ideal gas for measuring pulmonary dispersion function.
In 1915, Krogh first proposed the determination of the amount of lung dispersion (D) with carbon monoxide (CO) according to the principle of dispersionLCO). There are many different methods for pulmonary dispersion function examination using carbon monoxide (CO), including one-breath respiration, carbon monoxide uptake, constant state, rebreathing, and the most recently developed internal respiration that is simple to operate without breath-hold, but one-breath respiration with build-up of Ogilvie et al, pulmonary carbon monoxide (CO) dispersion function (D)LCO single-breath method，DLCO-sb) is most commonly used.
In the prior art, the lung function detection equipment mainly comprises a spirometer, a gas analyzer and a pressure gauge, can measure most indexes of lung functions such as lung capacity, ventilation, dispersion, respiratory muscle strength, oxygen consumption, carbon dioxide generation and the like, has a simple structure, can only detect common indexes of lung functions, and cannot accurately perform DLDetection of CO, and failure to achieve automated sample volume adjustment, D for children with VC less than 1L or severely restrictive disease patientsLCO is difficult to detect accurately;
in addition, existing equipment requires periodic weekly doubts of DLThe CO inspection has problems and is carried out before every inspection after the gas analyzer is started every day, zero point correction must be carried out on the gas analyzer and calibration is carried out by manually using a calibration cylinder, so that the volume or flow test of the pulmonary function instrument is normal, the manual operation is complex, the use is inconvenient, calibration misalignment easily occurs, the detection data misalignment and the detection efficiency are low, and the operation is unfavorable for operators and patients. Therefore, to solve the above problems, a detection system for lung dispersion function is proposed.
Disclosure of Invention
The invention aims to provide a lung diffusion function detection system to solve the problem that in the prior art, lung function detection equipment cannot accurately perform DLThe detection of CO, and can't realize the automatic sampling volume adjustment, use the problem that limits and manual operation are complicated and inconvenient.
In order to achieve the purpose, the invention provides the following technical scheme: a detection system for lung dispersion function comprises a gas supply element, a controller, a main gas path 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 into the main gas path, one side of the main gas path, which is far away from the gas supply element, is sequentially communicated with a first flowmeter and a mouthpiece, the main gas path is branched into a first auxiliary gas path, a second auxiliary gas path and a third auxiliary gas path which are positioned between the first valve and the first flowmeter, one end of the first auxiliary gas path, which is close to the main gas path, is connected into a second valve, the tail ends of the second auxiliary gas path and the third auxiliary gas path are respectively communicated with a sixth valve and a pressure sensor, the main gas path between the first auxiliary gas path and the second auxiliary gas path is connected into a fourth valve and a fifth valve, and the inlet end of the gas analyzer is communicated with a sampling pipe, the sampling pipe is used for gathering the test gas that first supplementary gas circuit was derived and the expired air of mouthpiece, gas analysis appearance's exit end intercommunication has the air pump, controller electric connection second valve, fourth valve, sixth valve, first flowmeter, gas analysis appearance and air pump.
Preferably, one end of the sampling pipe, which is far away from the gas analyzer, is inserted into the outlet end of the first auxiliary gas circuit.
Preferably, one end of the sampling pipe, which faces away from the gas analyzer, is communicated with the main gas path 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 are away from the gas analyzer, are both connected with a 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 valve further comprises a third valve communicated with the main air path, the third valve is a pressure relief valve, and the third valve is connected with the branch end of the main air path between the first valve and the fourth valve.
Preferably, the outlet end of the air pump is communicated with a second flow meter, and the second flow meter 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 an air 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 air conditioner further comprises a noise reduction smoothing device, wherein the noise reduction smoothing device is connected to the main air passage between the fifth valve and the second auxiliary air passage.
Preferably, the noise reduction smoothing device is a pipeline with a built-in honeycomb network, and the honeycomb network is composed of a plurality of stacked stainless steel mesh sheets.
The invention has at least the following beneficial effects:
1. compared with the existing lung function detection equipment, the invention provides a detection system for the lung carbon monoxide dispersion function on the basis of an one-breath breathing method, can more accurately detect the lung function basic index of a subject, and particularly improves the detection accuracy of the lung dispersion function;
2. the invention adopts the second valve to switch the sampling passage of the gas analyzer, realizes automatic sampling volume adjustment by matching the air pump and the second flowmeter, and is suitable for children with VC less than 1L or patients with severe restrictive diseasesLCO detection, application scope is wider, and each valve is controlled by the controller to be opened and closed, and the work cooperation of each component part can automatically carry out zero calibration andthe calibration of the test gas is realized without manual frequent operation, the phenomenon of calibration misalignment caused by manual use of a calibration cylinder is effectively avoided, the calibration 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 according to the present invention;
FIG. 2 is a schematic structural view of a dispersion test state according to the present invention;
FIG. 3 is a schematic structural diagram of another embodiment of the present invention;
fig. 4 is a schematic diagram of the connection of the controller in the present invention.
In the reference symbols: 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 flow meter; 13. biting mouth; 14. a pressure sensor; 15. a gas analyzer; 16. a sampling tube; 17. a seventh valve; 18. an air pump; 19. a second flow meter; 20. a noise reduction smoothing device; 21. and a controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, 2 and 4, the present invention provides a technical solution: a detection system for lung dispersion function comprises a gas supply element 1, a controller 21, a main gas path 2 connected with 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 can be a gas source bottle or a compressed gas source device and is used for providing test gas for detecting lung dispersion function, an outlet end of the gas supply element 1 is communicated with a first valve 6 connected into the main gas path 2, specifically, the first valve 6 is a pressure reducing valve and is used for reducing pressure at the outlet end of the gas supply element 1, so that the pressure of the main gas path 2 behind the first valve 6 is stable, the main gas path 2 is opened during work and closed during non-work, one side of the main gas path 2, which is far 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 and is used for measuring flow and volume values of a test subject during test, the mouthpiece 13 is a place where the oral cavity of the test subject is contacted with equipment, the testee needs to hold the mouthpiece 13 to perform the lung dispersion function test;
the main gas path 2 is branched with a first auxiliary gas path 3, a second auxiliary gas path 4 and a third auxiliary gas path 5 which are positioned between a first valve 6 and a first flowmeter 12, concretely, the first auxiliary gas path 3, the second auxiliary gas path 4 and the third auxiliary gas path 5 are distributed on the main gas path 2 between the first valve 6 and the first flowmeter 12 and distributed in the direction departing from the gas supply element 1, one end of the first auxiliary gas path 3 close to the main gas path 2 is connected with a second valve 7, concretely, 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 gas path 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 during air calibration, a port communicated with the first auxiliary gas path 3 is opened during test gas calibration, the other stages are normally closed, the tail ends of the second auxiliary gas path 4 and the third auxiliary gas path 5 are respectively communicated with a sixth valve 11 and a pressure sensor 14, specifically, the sixth valve 11 is a blocking valve for cutting off the gas path from communicating with the atmosphere, and is closed in the dispersion test inspiration and breath holding stage, and is opened in other stages, the pressure sensor 14 is used for measuring the oral cavity pressure in the test stage, generally, the pressure sensor focuses on the port pressure value in the breath holding stage, and the change of the port pressure is required to be not more than ± 3kPa in the dispersion test breath holding stage, the main gas path 2 between the first auxiliary gas path 3 and the second auxiliary gas path 4 is connected to the fourth valve 9 and the fifth valve 10, specifically, the fourth valve 9 is a gas supply valve, and is opened when gas source gas is required to be inhaled in the dispersion test stage, the other stages are normally closed, the fifth valve 10 is a one-way valve, and is opened when negative pressure exists in the main gas path 2, so that the gas source passes through;
the inlet end of the gas analyzer 15 is communicated with a sampling pipe 16, and the sampling pipe 16 is used for collecting the test gas led out from the first auxiliary gas path 3 and the exhaled gas of the mouthpiece 13;
in the gas calibration stage, one end of the sampling pipe 16, which is far away from the gas analyzer 15, is inserted into the outlet end of the first auxiliary gas circuit 3, that is, the sampling pipe 16 is communicated with the outlet end of the second valve 7, when the air is calibrated at zero point, the second valve 7 is adjusted to the position where the external air is communicated with the sampling pipe 16, the gas analyzer 15 performs zero point calibration through the air, when the gas is tested for calibration, the second valve 7 is adjusted to the position where the first auxiliary gas circuit 3 is communicated with the sampling pipe 16, and the gas analyzer 15 performs the test gas calibration on the gas supply element 1;
in the dispersion function testing stage, one end of the sampling pipe 16, which is far away from the gas analyzer 15, is communicated with the inside of the main gas path 2 at the inlet end or the outlet end of the first flowmeter 12, specifically, the main gas path 2 at the inlet end or the outlet end of the first flowmeter 12 is provided with a branch port, and is inserted into one end of the sampling pipe 16, which is far away from the gas analyzer 15, so that the gas exhaled by the subject through the mouthpiece 13 is guided into the gas analyzer 15 through the sampling pipe 16, and the gas analyzer 15 tests the exhaled gas of the subject;
the outlet end of the gas analyzer 15 is communicated with a gas pump 18, specifically, the gas pump 18 is a pump with adjustable rotating speed, and is used for pumping gas in the testing process through a gas path and 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 gas 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: a detection system for lung dispersion function comprises a gas supply element 1, a controller 21, a main gas path 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, specifically, the gas supply element 1 can be a gas source bottle or a compressed gas source device and is used for providing test gas for lung dispersion function detection, the outlet end of the gas supply element 1 is communicated with a first valve 6 connected into the main gas path 2, specifically, the first valve 6 is a pressure reducing valve and is used for reducing the pressure at the outlet end of the gas supply element 1, so that the pressure of the main gas path 2 behind the first valve 6 is stable, and the gas supply element is opened during working and closed during non-working;
one side of the main air path 2, which is far away from the air supply element 1, is sequentially communicated with a first flowmeter 12 and a mouthpiece 13, specifically, the first flowmeter 12 is a flow sensor and is used for measuring the flow and volume values in the test stage of a subject, the mouthpiece 13 is a place where the oral cavity of the subject contacts with equipment, the subject needs to hold the mouthpiece 13 for performing a lung dispersion function test, the main air path 2 is branched into a first auxiliary air path 3, a second auxiliary air path 4 and a third auxiliary air path 5 which are positioned between the first valve 6 and the first flowmeter 12, specifically, the first auxiliary air path 3, the second auxiliary air path 4 and the third auxiliary air path 5 are distributed on the main air path 2 between the first valve 6 and the first flowmeter 12 and are distributed towards the direction far away from the air supply element 1, the first auxiliary air path 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 path 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 during air calibration, a port communicated with the first auxiliary air path 3 is opened during testing gas calibration, the other stages are normally closed, the tail ends of the second auxiliary air path 4 and the third auxiliary air path 5 are respectively communicated with a sixth valve 11 and a pressure sensor 14, specifically, the sixth valve 11 is a blocking valve which is used for cutting off the air path from being communicated with the atmosphere, the sixth valve is closed during dispersion testing air suction and breath holding stages, the pressure sensor 14 is opened during other stages, the pressure sensor 14 is used for measuring the oral cavity pressure during testing, the oral cavity pressure value during breath holding stage is usually concerned, and the change of the oral cavity pressure is required to be not more than +/-3 kPa during dispersion testing breath holding stage, the main air path 2 between the first auxiliary air path 3 and the second auxiliary air path 4 is connected to a fourth valve 9 and a fifth valve 10, specifically, the fourth valve 9 is an air supply valve, in the dispersion test stage, the gas source gas is required to be sucked, the gas source gas is opened, the gas source gas is normally closed in the other stages, the fifth valve 10 is a one-way valve, and the fifth valve is automatically conducted when negative pressure exists in the main gas path 2, so that the 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 are away from the gas analyzer 15, are both connected with a sampling pipe 16, one of the ports is connected with the outlet end of the second valve 7 through the sampling pipe 16, the other port is connected into the main gas path 2 at the inlet end or the outlet end of the first flowmeter 12 through the sampling pipe 16, specifically, the main gas path 2 at the inlet end or the outlet end of the first flowmeter 12 is provided with a branch port communicated with the sampling pipe 16, and the seventh valve 17 can be controlled by the controller 21 to select, open, close and switch gas paths;
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 is calibrated at zero point, the second valve 7 is adjusted to a position where the outside air is communicated with the sampling pipe 16, the gas analyzer 15 performs zero point calibration through the air, when the gas is tested for calibration, the second valve 7 is adjusted to a position where the first auxiliary gas path 3 is communicated with the sampling pipe 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 introduced into the gas analyzer 15 through the sampling pipe 16, and the exhaled gas of the subject is further tested by the gas analyzer 15;
the outlet end of the gas analyzer 15 is communicated with a gas pump 18, specifically, the gas pump 18 is a pump with adjustable rotating speed, and is used for pumping gas in the testing process through a gas path and 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 gas pump 18, and specifically, the controller 21 is used for centralized control of electrical elements.
Example 3
Referring to fig. 1-4, the difference between the embodiments 1 and 2 is that:
the gas pressure protection device further comprises a third valve 8 communicated with the main gas path 2, the third valve 8 is a pressure relief valve, the third valve 8 is connected with a branch end of the main gas path 2 between the first valve 6 and the fourth valve 9, specifically, the main gas path 2 between the first valve 6 and the fourth valve 9 is provided with a branch port for installing the third valve 8, when the pressure of the main gas path 2 is too large due to some reason (such as the failure of the first valve 6 or the too large pressure impact of the gas supply element 1 after passing through the first valve 6), partial pressure is released by the third valve 8, and the main gas path 2 is protected.
The outlet end of the air pump 18 is communicated with a second flow meter 19, the second flow meter 19 is electrically connected with the controller 21, specifically, the second flow meter 19 is a small-range flow sensor, and is used for performing feedback control on the rotating speed of the air pump 18 or detecting whether the outlet flow of the air pump 18 is a value required by the gas analyzer 15, and the air pump 18 is matched to realize automatic sampling volume adjustment, so that the requirement of stable flow rate of the gas analyzer in the gas analyzer 15 is met.
The noise reduction and smoothing device 20 is connected to the main air path 2 between the fifth valve 10 and the second auxiliary air path 4, the noise reduction and smoothing device 20 is a pipeline with a built-in honeycomb network, specifically, the honeycomb network is composed of a plurality of stacked stainless steel mesh sheets, noise reduction and smoothing can be performed on air flow at the outlet end of the fifth valve 10 through the noise reduction and smoothing device 20, and air flow is stabilized, namely, the passing air flow is dispersed and smoothed through the densely-distributed honeycomb network, so that air flow impact is avoided, and the influence on air suction in the test process of a test subject is caused.
The working principle is as follows:
when the device is used, the controller 21 is connected with an upper computer (such as a computer) through data, and the data calculation result is analyzed through the upper computer, and the device specifically operates as follows:
firstly, a working process of a gas calibration stage:
when gas calibration is performed, the sampling pipe 16 is connected to the outlet end of the second valve 7.
Starting calibration:
step 1: 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 flow meter 19, the gas pump 18, and the gas analyzer 15 all start operating. The fifth valve 10, the sixth valve 11, the first flow meter 12, and the pressure sensor 14 do not operate.
Step 2: the controller 21 controls the second valve 7 to adjust the position where the external air is communicated with the sampling pipe 16, and the gas analyzer 15 firstly performs zero calibration after air passes for a period of time; after the zero point calibration is successful, the controller 21 controls the second valve 7 to repeatedly open and close the passage between the first auxiliary gas path 3 and the sampling tube 16, for example, opening for 5s, closing for 5s, or opening for 3s, closing for 3s, and after a plurality of cycles, closing the second valve 7; the test gas in the gas supply element 1 is calibrated by the gas analyzer 15 when the valve 2 is opened.
Step 3: and 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.
II, a test flow of lung diffusion function of the subject:
after the gas calibration is successful, when a lung dispersion function test is performed, the sampling tube 16 is communicated with a branch port of the main gas circuit 2 at the outlet end or the inlet end of the first flowmeter 12.
The test was started:
step 1: the test gas in the gas supply element 1 is introduced into the main gas path 2, the pressure at the outlet of the first valve 6 is maintained 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 normally works, the fourth valve 9 is closed, the fifth valve 10 is not subjected to negative pressure, and therefore, the fifth valve is temporarily in a closed state, and the sixth valve 11 is in an open state. The pressure sensor 14, the first flow meter 12, the second flow meter 19, the gas pump 18, and the gas analyzer 15 all start to operate.
Step 2: usually, zero calibration needs to be performed 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, a subject wears a nose clip and holds a mouthpiece 13, it is ensured that gas only enters and exits from the mouthpiece and does not enter and exit from the nasal cavity, quiet breathing (tidal breathing) is started, after the tidal breathing of the subject is stable, an operator guides the subject to inhale to a lung total volume (TLC) position, and then exhales to a residual gas (RV) position, in the exhalation process, the operator operates the controller 21 to open the fourth valve 9, the controller 21 starts to detect the breathing condition of the subject (whether the subject exhales or inhales at the moment, whether the value change is detected by the gas analyzer 15 to analyze, whether the value change is exhalation, and whether the value change is inhalation.
Step 3: when the controller 21 detects the moment when the subject changes from expiration to inspiration, the controller controls the sixth valve 11 to close, the fifth valve 10 to open under the effect of the negative pressure in the main gas circuit 2, and the subject inhales the test gas in the gas supply unit 1.
Step 4: the subject inspires gas to the level of total lung volume (TLC), when the controller 21 detects that the subject is at the end of inspiration, the fourth valve 9 is closed, the air pump 18 stops operating, and the controller 21 performs a 10 second breath hold countdown period (breath hold time can be set before starting the test, typically 10 seconds is required).
Step 5: after the controller 21 finishes counting down, the air pump 18 starts to work, opens the sixth valve 11, informs the examinee, and enables the examinee to breathe after breathing to the residual air level, and the test is finished.
Step 6: the test may be terminated by the controller 21 or by manually operating the controller 21, and the pressure sensor 14, the first flow meter 12, the second flow meter 19, the air pump 18, and the gas analyzer 15 are turned off and stopped. The controller 21 performs data analysis to obtain a dispersion test result.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, 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 is capable of 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 appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A detection system for pulmonary dispersion function, characterized by: the gas analyzer comprises a gas supply element (1), a controller (21), a main gas circuit (2) connected with an 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 circuit (2), one side of the main gas circuit (2) departing from the gas supply element (1) is sequentially communicated with a first flowmeter (12) and a mouthpiece (13), the main gas circuit (2) is branched into a first auxiliary gas circuit (3), a second auxiliary gas circuit (4) and a third auxiliary gas circuit (5) which are positioned between the first valve (6) and the first flowmeter (12), one end of the first auxiliary gas circuit (3) close to the main gas circuit (2) is connected with a second valve (7), and the tail ends of the second auxiliary gas circuit (4) and the third auxiliary gas circuit (5) are respectively communicated with a sixth valve (11) and a pressure sensor (14), the main gas circuit (2) between first supplementary gas circuit (3) and second supplementary gas circuit (4) inserts fourth valve (9) and fifth valve (10), the entry end intercommunication of gas analysis appearance (15) has sampling pipe (16), sampling pipe (16) are used for gathering the test gas that first supplementary gas circuit (3) were derived and the expired air of mouthpiece (13), the exit end intercommunication of gas analysis appearance (15) has air pump (18), controller (21) electric connection second valve (7), fourth valve (9), sixth valve (11), first flowmeter (12), gas analysis appearance (15) and air pump (18).
2. A detection system for lung diffusion function according to claim 1, characterized by: one end of the sampling pipe (16) departing from the gas analyzer (15) is inserted into the outlet end of the first auxiliary gas circuit (3).
3. A detection system for lung diffusion function according to claim 1, characterized by: one end of the sampling pipe (16) departing from the gas analyzer (15) is communicated with the inside of the main gas circuit (2) at the inlet end or the outlet end of the first flowmeter (12).
4. A detection system for lung diffusion function according to claim 1, characterized by: the gas analyzer also comprises a seventh valve (17) communicated with the inlet end of the gas analyzer (15), the seventh valve (17) is a three-position three-way electromagnetic valve, and the seventh valve (17) is electrically connected with the controller (21).
5. A detection system for lung diffusion function according to claim 4, characterized in that: and two ports of the seventh valve (17) departing from the gas analyzer (15) are connected with sampling pipes (16), one of the ports is connected with the first auxiliary gas circuit (3) through the sampling pipes (16), and the other port is connected into the main gas circuit (2) at the inlet end or the outlet end of the first flowmeter (12) through the sampling pipes (16).
6. A detection system for lung diffusion function according to claim 1, characterized by: still include third valve (8) with main gas circuit (2) intercommunication, third valve (8) are the relief valve, third valve (8) are connected with the branch end of main gas circuit (2) between first valve (6) and fourth valve (9).
7. A detection system for lung diffusion function according to claim 1, characterized by: the outlet end of the air pump (18) is communicated with a second flow meter (19), and the second flow meter (19) is electrically connected with a controller (21).
8. A detection system for lung diffusion function according to claim 1, characterized by: 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 an air 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.
9. A detection system for lung diffusion function according to claim 1, characterized by: the noise reduction and smoothing device (20) is connected between the fifth valve (10) and the second auxiliary air channel (4) through the main air channel (2) in an access mode.
10. A detection system for lung diffusion function according to claim 9, wherein: the noise reduction smoothing device (20) is a pipeline internally provided with a honeycomb network, and the honeycomb network consists of a plurality of laminated stainless steel mesh sheets.
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| CN202111271625.8A CN113974606A (en) | 2021-10-29 | 2021-10-29 | Detection system for lung diffusion function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114403853A (en) * | 2022-02-21 | 2022-04-29 | 中国人民解放军总医院第一医学中心 | Portable dispersion residual qi lung function tester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114403853A (en) * | 2022-02-21 | 2022-04-29 | 中国人民解放军总医院第一医学中心 | Portable dispersion residual qi lung function tester |
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