Exhaled gas analysis device

Abstract

The invention discloses an exhaled gas analysis device, and relates to the technical field of medical instruments, the exhaled gas analysis device comprises a ventilation handle, a first gas inlet, a second gas inlet and a gas analysis module, the gas analysis module is used for analyzing components of gas exhaled by a human body; one end of the first gas inlet and one end of the second gas inlet are both communicated with the gas analysis module; the other end of the first gas inlet is communicated with the ventilation handle, and the other end of the second gas inlet is communicated with calibration gas; and when the gas analysis module is calibrated, the first gas inlet is closed, the second gas inlet is opened, and the gas analysis module performs calibration by using calibration gas introduced from the second gas inlet. Compared with an existing scheme, the expired gas analysis device solves the technical problem that when repeated lung dispersion function measurement is carried out, gas zero calibration is inaccurate due to the fact that measurement errors exist.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an exhaled gas analysis device. Background Art

[0002] The diffusion function of the lungs refers to the ability of a certain alveolar gas to diffuse from the alveoli to the capillaries through the alveolar membrane into the blood and bind to the hemoglobin in the red blood cells. There are many ways to measure the diffusion function of the lungs, including the one-breath breathing method, the carbon monoxide uptake method, the steady-state method, the repeated breathing method, and the internal breathing method. The most commonly used method is the one-breath breathing method. The lung diffusion function test involves a gas analyzer. Before the test, the instrument needs to be calibrated to improve the measurement accuracy. For example, before each test, the gas analyzer needs to be zero-calibrated, that is, to ensure the accuracy of the instrument's gas zero position.

[0003] However, when repeatedly measuring the pulmonary diffusion function, there may be residual detection gas in the instrument's pipeline. When there is residual detection gas in the pipeline, it will affect the accuracy of the gas zero point and the accuracy of the pulmonary diffusion function measurement. For example, when using the one-breath breathing method to measure the pulmonary diffusion function, detection gas is required. Commonly used detection gases include carbon monoxide (CO) and methane (CH4). After the measurement is completed, there will be residual detection gas in the pipeline of the measuring instrument. At this time, if the pipeline with residual detection gas is used to calibrate the gas concentration to zero, the gas concentration zero point result will have errors, which will affect the accuracy of subsequent pulmonary diffusion function measurements.

[0004] It can be seen that how to reduce the error of gas zero calibration and improve the accuracy of gas zero calibration when performing repeated pulmonary diffusion function measurements is a technical problem that has yet to be solved. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an exhaled gas analysis device, which solves the technical problem of inaccurate calibration of gas zero calibration due to measurement error when performing repeated pulmonary diffusion function measurements.

[0006] In a first aspect, in order to solve the above technical problems, the present application provides an exhaled gas analysis device, which may include: A ventilation handle, a first air inlet, a second air inlet and a gas analysis module, wherein the gas analysis module is used to analyze the gas components exhaled by a human body; One end of the first air inlet and one end of the second air inlet are both connected to the gas analysis module; The other end of the first air inlet is connected to the ventilation handle, and the other end of the second air inlet is connected to the calibration gas; When the gas analysis module is calibrated, the first gas inlet is closed and the second gas inlet is opened, and the gas analysis module is calibrated using the calibration gas introduced from the second gas inlet.

[0007] In some possible implementations, the exhaled gas analysis device may further include a first air inlet valve, which is a three-way valve, the first air inlet port and the second air inlet port are both input ports of the first air inlet valve, and the output port of the first air inlet valve is connected to the gas analysis module.

[0008] In some possible implementations, the exhaled gas analysis device may further include a control module, which is communicatively connected to the first air inlet valve, and is used to control the first air inlet valve to close the first air inlet and open the second air inlet when calibrating the gas analysis module.

[0009] In some possible implementations, the control module is further configured to control the first air intake valve to open the first air intake port and close the second air intake port after determining that the calibration process is completed.

[0010] In some possible implementations, the exhaled gas analysis device may further include an air extraction module, which is connected to the gas analysis module. When calibrating the gas analysis module, the air extraction module is used to draw calibration gas into the gas analysis module from the second air inlet.

[0011] In some possible implementations, the control module is further used to control the gas extraction module to extract calibration gas for a preset time period from the second gas inlet into the gas analysis module when calibrating the gas analysis module.

[0012] In some possible implementations, the first air inlet valve is provided with a knob or a control button for controlling the opening and closing of the first air inlet and the second air inlet.

[0013] In some possible implementations, the exhaled gas analysis device may further include a second air inlet valve and a third air inlet valve, both of which are two-way valves, the second air inlet valve is arranged on the air path between the first air inlet port and the gas analysis module, and the third air inlet valve is arranged on the air path between the second air inlet port and the gas analysis module.

[0014] According to an exhaled gas analysis device of an embodiment of the present application, it has at least the following beneficial effects: The exhaled gas analysis device comprises a ventilation handle, a first air inlet, a second air inlet and a gas analysis module. The gas analysis module is used to analyze the gas components exhaled by the human body. The user's mouthpiece is connected to the ventilation handle. One end of the first air inlet and the second air inlet are both connected to the gas analysis module, the other end of the first air inlet is connected to the ventilation handle, and the other end of the second air inlet is connected to the calibration gas. When performing a diffusion test, the first air inlet is opened and the second air inlet is closed. The user can transmit the exhaled gas to the gas split module through the ventilation handle via the first air inlet for analysis; when calibrating the gas analysis module, the calibration gas can be outside air. At this time, the first air inlet is closed and the second air inlet is opened. The gas analysis module can be calibrated using the calibration gas introduced from the second air inlet. Since the gas analysis module directly uses the calibration gas for zero calibration when calibrating the gas analysis module, compared with the prior art, the exhaled gas analysis device can avoid the calibration error caused by the residual detection gas in the pipeline when calibrating the gas analysis module, and has better calibration accuracy.

[0015] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of an embodiment of an exhaled gas analysis device provided in an embodiment of the present application; Figure 2 is a schematic diagram of another embodiment of an exhaled gas analysis device provided in an embodiment of the present application; Figure 3 is a schematic diagram of another embodiment of an exhaled gas analysis device provided in an embodiment of the present application; Figure 4 It is a schematic diagram of another embodiment of an exhaled gas analysis device provided in an embodiment of the present application. Implementation

[0017] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0018] In the description of this application, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0019] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] In the description of this application, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0021] In the embodiments of the present application, exhaled gas analysis mainly refers to a medical diagnostic technology that analyzes the gas components exhaled by the human body and uses the analysis results to diagnose diseases, wherein the gas components may include component information and concentration information, and the objects analyzed in exhaled gas analysis are different in different application scenarios, and common ones may include carbon monoxide detection in pulmonary diffusion function tests, exhaled nitric oxide detection, etc.

[0022] It should be noted that the exhaled gas analysis device in the embodiment of the present application may be applied to other exhaled gas detection scenarios, such as exhaled nitric oxide detection, in addition to the above-mentioned lung diffusion test scenario. In these scenarios, in order to improve the accuracy of the exhaled gas detection results, it is necessary to calibrate the gas analysis module regularly or irregularly using calibration gas.

[0023] Specifically, taking the lung diffusion test scenario as an example, when the exhaled gas analysis device is used in the lung diffusion test, it can exist as a component of the lung function detection equipment, and the gas analysis module in the exhaled gas analysis device can include a carbon monoxide sensor. In this scenario, in order to ensure the accuracy of the lung diffusion test results, the gas analysis module needs to be calibrated each time the test is performed, that is, the gas analysis module is calibrated to zero gas using a calibration gas, and the calibration gas can refer to the outside air.

[0024] However, in the case of repeated testing, the test gas path between the user's mouthpiece and the gas analysis module contains the exhaled gas of the previous test personnel, and the composition of the exhaled gas is unknown or inaccurate. If the subsequent calibration uses the gas in the test gas path as the calibration gas, the subsequent calibration will inevitably be inaccurate. Based on this, the exhaled gas analysis device provided in the embodiment of the present application is provided with a second air inlet that is in air path communication with the gas analysis module. When calibrating the gas analysis module, the calibration gas introduced from the second air inlet can be used for calibration, thereby improving the calibration accuracy.

[0025] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments.

[0026] Specific reference Figure 1 , Figure 1 FIG. 1 is a schematic diagram of an embodiment of an exhaled gas analysis device provided by the present application, wherein the exhaled gas analysis device comprises: A ventilation handle 110, a first air inlet 120, a second air inlet 130 and a gas analysis module 140, wherein the gas analysis module 140 is used to analyze the gas components exhaled by a human body; One end of the first air inlet 120 and one end of the second air inlet 130 are both connected to the gas analysis module 140; The other end of the first air inlet 120 is connected to the ventilation handle 110, and the other end of the second air inlet 130 is connected to the calibration gas; When the gas analysis module 140 is calibrated, the first gas inlet 120 is closed and the second gas inlet 130 is opened, and the gas analysis module 140 is calibrated using the calibration gas introduced from the second gas inlet 130 .

[0027] In this embodiment, the gas analysis module 140 may include a gas sensor, which can detect the gas components exhaled by the human body, such as components or concentrations, and generate detection results for subsequent analysis and diagnosis. The input source gas of the gas analysis module 140 can come from the first air inlet 120 of the ventilation handle 110 or the second air inlet 130 of the calibration gas. One end of the first air inlet 120 and the second air inlet 130 are both connected to the gas analysis module 140, the other end of the first air inlet 120 is connected to the ventilation handle 110, and the other end of the second air inlet 130 is connected to the calibration gas, which can be a gas with known concentration and composition and suitable for calibration requirements, such as air can be used as the calibration gas in the gas zero calibration of the carbon monoxide sensor. Specifically, the ventilation handle 110 can be connected to a user mouthpiece and a sampling connector, the sampling connector is connected to the user mouthpiece, and the sampling connector can be connected to the first air inlet 120 through a sampling tube.

[0028] In this embodiment, the exhaled gas analysis device may have relevant components for controlling the opening and closing of the first air inlet 120 and the second air inlet 130, so that when performing exhaled gas detection, such as pulmonary diffusion function testing, the air path between the first air inlet 120 and the gas analysis module 140 can be set to be connected, and the second air inlet 130 can be set to be closed. At this time, the gas analysis module 140 can obtain the user's exhaled gas from the first air inlet 120 and perform detection; and when calibrating the gas analysis module 140, the first air inlet 120 can be set to be closed and the second air inlet 130 can be opened. At this time, the gas analysis module 140 uses the calibration gas introduced from the second air inlet 130 for calibration.

[0029] It should be noted that the exhaled gas analysis device may receive a calibration instruction from the user before calibration, thereby starting the calibration process, or it may automatically perform the calibration process according to an automatically set program before detection, or use other methods to trigger the calibration program, which is not limited here.

[0030] According to an exhaled gas analysis device of an embodiment of the present application, it has at least the following beneficial effects: The exhaled gas analysis device includes a ventilation handle 110, a first air inlet 120, a second air inlet 130 and a gas analysis module 140. The gas analysis module 140 is used to analyze the gas components exhaled by a human body. The user mouthpiece is connected to the ventilation handle 110. One end of the first air inlet 120 and one end of the second air inlet 130 are both connected to the gas analysis module 140, the other end of the first air inlet 120 is connected to the ventilation handle 110, and the other end of the second air inlet 130 is connected to the calibration gas. When conducting a diffusion test, the first air inlet 120 is opened and the second air inlet 130 is closed. The user can transmit the exhaled air to the gas separation module for analysis through the ventilation handle 110 via the first air inlet 120; when calibrating the gas analysis module 140, the calibration gas can be outside air. At this time, the first air inlet 120 is closed and the second air inlet 130 is opened. The gas analysis module 140 can be calibrated using the calibration gas transmitted from the second air inlet 130. Since the gas analysis module 140 directly uses the calibration gas for zero-point calibration when calibrating the gas analysis module 140, compared with the prior art, the exhaled gas analysis device can avoid the calibration error caused by the residual detection gas in the pipeline when calibrating the gas analysis module 140, and has better calibration accuracy.

[0031] In some possible implementations, specific reference is made to Figure 2 As shown in the schematic diagram of the embodiment, the exhaled gas analysis device may further include a first air inlet valve 150, which is a three-way valve. The first air inlet port 120 and the second air inlet port 130 are both input ports of the first air inlet valve 150, and the output port of the first air inlet valve 150 is connected to the gas analysis module 140.

[0032] In this embodiment, the exhaled gas analysis device may further include a first air inlet valve 150, which is a three-way valve having two air inlets, or input ports, and one air outlet, or output port. The first air inlet 120 and the second air inlet 130 are both input ports of the first air inlet valve 150, and the output port of the first air inlet valve 150 is connected to the gas analysis module 140. The three-way valve may be a two-position three-way valve, which is normally in a first state (during the detection process or the standby process), that is, the first air inlet 120 and the second air inlet 130 are respectively in an open and closed state; and when calibrating, it is in a second state, that is, the first air inlet 120 and the second air inlet 130 are respectively in a closed and open state. Among them, the three-way valve can control the connection state between the air inlet and the air outlet manually or automatically.

[0033] In some possible implementations, specific reference is made to Figure 3As shown in the schematic diagram of the embodiment, the exhaled gas analysis device may also include a control module 160, which is communicatively connected to the first air inlet valve 150, and the control module 160 is used to control the first air inlet valve 150 to close the first air inlet port 120 and open the second air inlet port 130 when calibrating the gas analysis module 140.

[0034] In this embodiment, the exhaled gas analysis device may further include a control module 160. The first air inlet valve 150 may be a solenoid valve. The control module 160 is communicatively connected to the first air inlet valve 150. The control module 160 may have a control chip, such as a microcontroller unit (MCU) or a field programmable gate array (FPGA) chip, etc., which can control the working state of the first air inlet valve 150, that is, control the opening and closing states of the first air inlet port 120 and the second air inlet port 130 by issuing instructions.

[0035] In some possible implementations, the control module 160 is further configured to control the first air intake valve 150 to open the first air intake port 120 and close the second air intake port 130 after determining that the calibration process is completed.

[0036] In this embodiment, the above-mentioned control module 160 is also used to stop the calibration after determining that the calibration process is completed, such as receiving a calibration end instruction, or after satisfying certain pre-set calibration process limits, such as a calibration time limit, and send a control instruction to the first intake valve 150 to open the first intake port 120 and close the second intake port 130 at the same time.

[0037] In some possible implementations, specific reference is made to Figure 4 As shown in the schematic diagram of the embodiment, the exhaled gas analysis device may further include an exhaust module 170, which is connected to the gas analysis module 140. When calibrating the gas analysis module 140, the exhaust module 170 is used to draw calibration gas into the gas analysis module 140 from the second air inlet 130.

[0038] In this embodiment, the gas analysis module 140 has an air inlet and an air outlet, the first air inlet 120 and the second air inlet 130 are both connected to the air inlet of the gas analysis module 140, and the air extraction module 170, such as an air extraction pump, is connected to the air outlet of the gas analysis module 140. When calibrating the gas analysis module 140, by starting the air extraction module 170, the calibration gas can be drawn from the second air inlet 130 into the gas analysis module 140 for detection and calibration.

[0039] In some possible implementations, the control module 160 is further used to control the gas extraction module 170 to extract calibration gas for a preset time period from the second gas inlet 130 into the gas analysis module 140 when calibrating the gas analysis module 140 .

[0040] In this embodiment, the calibration duration can be pre-set. When performing calibration, the exhaust module 170 is controlled to draw calibration gas for a preset duration from the second air inlet 130 into the gas analysis module 140 for calibration, and the exhaust can be stopped after the timing reaches the preset duration.

[0041] In some possible implementations, the first air inlet valve 150 is provided with a knob or a control button for controlling the opening and closing of the first air inlet 120 and the second air inlet 130 .

[0042] In this embodiment, a knob or a control button may also be provided on the first air intake valve 150. During calibration, the user may also manually control the opening and closing states of the first air intake port 120 and the second air intake port 130 on the first air intake valve 150 through the knob or the control button.

[0043] In some possible implementations, the exhaled gas analysis device may further include a second air intake valve and a third air intake valve, both of which are two-way valves, the second air intake valve is arranged on the air path between the first air inlet port 120 and the gas analysis module 140, and the third air intake valve is arranged on the air path between the second air inlet port 130 and the gas analysis module 140.

[0044] In this embodiment, in addition to the three-way valve structure used to connect the first air inlet 120, the second air inlet 130 and the gas analysis module 140 in the above-mentioned related embodiments, the gas paths where the first air inlet 120 and the second air inlet 130 are respectively connected to the gas analysis module 140 may also be respectively connected in series with a second air inlet valve and a third air inlet valve. Both the second air inlet valve and the third air inlet valve are two-way valves, and the second air inlet valve and the third air inlet valve may be controlled by the manual control method shown above, or may be automatically controlled by the control module 160 as described above, and the details will not be repeated here.

[0045] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. An exhaled gas analysis device, characterized in that: include: A ventilation handle, a first air inlet, a second air inlet and a gas analysis module, wherein the gas analysis module is used to analyze the gas components exhaled by a human body; One end of the first air inlet and one end of the second air inlet are both connected to the gas analysis module; The other end of the first air inlet is connected to the ventilation handle, and the other end of the second air inlet is connected to the calibration gas; When the gas analysis module is calibrated, the first gas inlet is closed and the second gas inlet is opened, and the gas analysis module is calibrated using the calibration gas introduced from the second gas inlet.

2. The exhaled gas analysis device according to claim 1, characterized in that: The exhaled gas analysis device further includes a first air intake valve, which is a three-way valve. The first air intake port and the second air intake port are both input ports of the first air intake valve, and the output port of the first air intake valve is connected to the gas analysis module.

3. The exhaled gas analysis device according to claim 2, characterized in that: The exhaled gas analysis device further includes a control module, which is communicatively connected to the first air inlet valve, and is used to control the first air inlet valve to close the first air inlet and open the second air inlet when calibrating the gas analysis module.

4. The exhaled gas analysis device according to claim 3, characterized in that: The control module is further configured to control the first air intake valve to open the first air intake port and close the second air intake port after determining that the calibration process is completed.

5. The exhaled gas analysis device according to claim 3, characterized in that: The exhaled gas analysis device further comprises an air extraction module, which is in communication with the gas analysis module. When calibrating the gas analysis module, the air extraction module is used to draw the calibration gas into the gas analysis module from the second gas inlet.

6. The exhaled gas analysis device according to claim 5, characterized in that: The control module is further configured to control the gas extraction module to extract the calibration gas for a preset time period from the second gas inlet into the gas analysis module when calibrating the gas analysis module.

7. The exhaled gas analysis device according to claim 2, characterized in that: The first air inlet valve is provided with a knob or a control button for controlling the opening and closing of the first air inlet and the second air inlet.

8. The exhaled gas analysis device according to claim 1, characterized in that: The exhaled gas analysis device also includes a second air inlet valve and a third air inlet valve, both of which are two-way valves. The second air inlet valve is arranged on the air path between the first air inlet port and the gas analysis module, and the third air inlet valve is arranged on the air path between the second air inlet port and the gas analysis module.

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