A test system and test device for a diffusion spirometer

Abstract

The present invention discloses a test system for a diffusion spirometer. The test system includes a terminal module, a control module and an air supply module. The terminal module is used to input preset data, and output the preset data to the control module, and calculate the lung carbon monoxide diffusion data according to the preset data, and compare it with the result of the diffusion spirometer. The control module is used to receive the preset data and control the operation of the air supply module with the preset data. The air supply module is connected to the diffusion spirometer and is used to simulate the breathing process according to the preset data. The test system and test device of the diffusion spirometer of the present invention simulate the entire diffusion function test of the human body, and can preset the concentrations of alveolar carbon monoxide and tracer gas after breath holding, the amount of inhaled gas, the breath holding time and other key parameters, so as to calculate the reference value of the test result of the lung diffusion function, compare it with the result of the diffusion spirometer, and verify the correctness and accuracy of the calculation of the parameters tested by the lung diffusion function.

Description

Technical Field

[0001] The present invention relates to the technical field of testing of pulmonary function instruments, in particular to a testing system and a testing device of a diffusion pulmonary function instrument. Background Art

[0002] Pulmonary diffusion capacity refers to the ability of a particular alveolar gas to diffuse through the alveolar membrane from the alveoli into the capillaries, reach the bloodstream, and bind to hemoglobin in red blood cells. Pulmonary diffusion capacity measurement measures the exchange of oxygen and carbon dioxide across the alveoli and pulmonary capillary walls within the lungs. Currently, the following methods and steps are commonly used to test pulmonary diffusion capacity: 1. Quiet breathing: The subject wears a nasal clip and a mouthpiece, then breathes quietly for 4-5 cycles. 2. Full exhalation: After the end-tidal baseline stabilizes, exhale completely to the residual volume. 3. Rapid inspiration: Inhale quickly and evenly to the total lung volume (recommended within 2 seconds, or within 4 seconds for those with airway obstruction). 4. Breath-hold: Hold for approximately 10 seconds. 5. Moderate and uniform exhalation: Exhale evenly and continuously at a moderate rate to the residual volume (recommended within 2-4 seconds). The corresponding data obtained in these steps are then calculated using the DLCO (diffusing capacity of the lungs for carbon monoxide) formula. Without taking into account the correction factors for hemoglobin and altitude, using traditional units (mL(STPD) min-1 mmHg-1), DLCO is calculated as follows:

[0003]

[0004] Among them, v ASTPD It represents the value of alveolar capacity in the STPD state, (VI-physiological dead space-systemic dead space)*FICH4 / FACH4; the physiological dead space is 150ml (not applicable to children) or calculated by the formula 2.2ml*body weight (kg) (not applicable to obese people); the systemic dead space is a fixed value and can be measured according to the structure of the diffusion spirometer.

[0005] t BH Indicates breath-holding time, in seconds;

[0006] p B Indicates atmospheric pressure in mmHg;

[0007] 47 is the water vapor pressure at 37 degrees Celsius, in mmHg;

[0008] F ICO Indicates the concentration of inhaled gas CO;

[0009] F ACH4 Indicates the concentration of exhaled CH4;

[0010] F ICH4Indicates the concentration of CH4 in the inhaled gas;

[0011] F ACO Indicates the concentration of exhaled CO;

[0012] The above method uses carbon monoxide to test the lung diffusion function. In order to calculate the carbon monoxide diffusion capacity, it is necessary to measure the carbon monoxide concentration in the alveolar gas at the beginning of diffusion and after breath holding, as well as the alveolar volume.

[0013] The diffusion spirometers currently used in medical treatment are developed and produced based on the above-mentioned test methods. They require a set of test systems and test devices to verify the correctness and accuracy of their parameters. They can only be put into use after passing the inspection. At present, there are no relevant test systems and test devices, which brings inconvenience to the calibration and use of diffusion spirometers. Summary of the Invention

[0014] The main technical problem solved by the present invention is to provide a test system and a test device for a diffusion spirometer, so as to solve the problem that the correctness and accuracy of the current diffusion spirometer parameter calculation and results cannot be verified.

[0015] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a test system for a diffusion spirometer for testing the diffusion spirometer, the test system comprising a terminal module, a control module and an air supply module;

[0016] The terminal module is used to input preset data, output the preset data to the control module, and calculate the lung carbon monoxide diffusion data based on the preset data, and compare it with the result of the diffusion spirometer;

[0017] The control module is used to receive the preset data and control the operation of the gas supply module according to the preset data;

[0018] The air supply module is connected to the diffusion spirometer and is used to simulate the breathing process according to the preset data.

[0019] Wherein, the air supply module includes a breathing simulation module, an inhaled gas supply module and an exhaled gas supply module, the diffusion spirometer includes an air inlet and an air outlet, and the breathing simulation module, the inhaled gas supply module and the exhaled gas supply module are all connected to the air inlet;

[0020] The breathing simulation module is used to output fixed-frequency inspiration and exhalation, complete exhalation, and rapid inspiration to the diffusion spirometer, and the breathing simulation module, the air inlet, and the air outlet form a first gas passage;

[0021] The inhalation gas supply module is used to output the gas during rapid inhalation to the diffusion spirometer, and the inhalation gas supply module, the air inlet and the breathing simulation module form a second gas passage;

[0022] The exhaled gas supply module is used to output the gas during uniform exhalation to the diffusion spirometer. The exhaled gas supply module, the air inlet and the air outlet form a third gas passage.

[0023] Among them, the gas output by the breathing simulation module is air; the gas output by the inhalation gas supply module contains 0.3% CO, 0.3% CH4, 21% O2, and the rest is N2; the gas output by the exhalation gas supply module contains 5% CO2, 21% O2, 0.08% to 0.13% CO, 0.16% to 0.22% CH4, and the rest is N2.

[0024] The control module is used to control the operation of the breathing simulation module, the inhalation gas supply module and the exhalation gas supply module.

[0025] The control module is further configured to control the opening and closing of the first gas passage, the second gas passage, and the third gas passage.

[0026] The preset data include tidal volume, tidal breathing cycle, residual volume, inspiratory volume, inspiratory time, breath-holding time, exhalation time and the composition of exhaled gas during the exhalation time.

[0027] To solve the technical problem, the present invention also provides a test device for a diffusion spirometer, which uses the above-mentioned test system for the diffusion spirometer. The test device includes a terminal host, a controller, and an air supply mechanism.

[0028] The terminal host includes an input panel, a CPU and a display screen, wherein the input panel is used to input preset data, the CPU calculates lung carbon monoxide diffusion data based on the preset data and compares it with the result of the diffusion spirometer, and the display screen is used to display the calculation result;

[0029] The controller is electrically connected to the terminal host and is used to control the operation of the gas supply mechanism according to the preset data;

[0030] The gas supply mechanism is connected to the diffusion spirometry instrument and is used to supply gas to the diffusion spirometry instrument according to the preset data.

[0031] Wherein, the air supply mechanism includes a breathing simulation air cylinder, an inhaled gas storage chamber and an exhaled gas supply air cylinder, and the breathing simulation air cylinder, the inhaled gas storage chamber and the exhaled gas supply air cylinder are all connected to the diffusion spirometer;

[0032] The gas supply mechanism further comprises a plurality of gas storage bins, and the plurality of gas storage bins are all connected to the exhaled gas supply cylinder.

[0033] Wherein, the breathing simulation cylinder, the inhaled gas storage chamber and the exhaled gas supply cylinder are all provided with a pusher, and the controller is used to control the operation of the pusher.

[0034] Among them, a first valve is provided between the breathing simulation gas cylinder and the diffusion spirometry instrument, a second valve is provided between the inhaled gas storage tank and the diffusion spirometry instrument, a third valve is provided between the exhaled gas supply gas cylinder and the diffusion spirometry instrument, and a fourth valve is provided between the gas storage tank and the exhaled gas supply gas cylinder. The controller is also used to control the opening and closing of the first valve, the second valve, the third valve and the fourth valve.

[0035] Compared with the prior art, the test system and test device of the diffusion spirometer of the present invention achieve the following beneficial effects: simulating the entire diffusion function test of the human body, and being able to preset key parameters such as the concentration of alveolar carbon monoxide and tracer gas after breath-holding, the amount of inhaled gas, and the breath-holding time, thereby calculating the reference values ​​of the key parameters tested by the pulmonary diffusion function, and comparing them with the results of the diffusion spirometer to verify the correctness and accuracy of the calculation of the parameters tested by the pulmonary diffusion function, thereby calibrating the diffusion spirometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a schematic diagram of the testing process of lung diffusion function;

[0038] Figure 2 It is a structural block diagram of the test system of the diffusion spirometer of the present invention;

[0039] Figure 3 It is a structural block diagram of the testing device of the diffusion spirometer of the present invention;

[0040] Figure 4 It is a structural diagram of the air supply mechanism. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] In the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units that are inherent to these processes, methods, products or devices.

[0043] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] The diffusion spirometer test system of the present invention is used to test the diffusion spirometer. The test principle is to test the lung diffusion function of a simulated person in an external environment, pre-set test data, simulate the diffusion spirometer test according to the preset data, and then compare the test data of the diffusion spirometer with the standard data calculated by the test system to obtain the test accuracy of the diffusion spirometer, thereby calibrating the diffusion spirometer. The standard data calculated by the test system is obtained according to the DLCO calculation formula.

[0045] For details, please refer to Figure 2The test system of the present application includes a terminal module, a control module, and an air supply module. The terminal module is used to input preset data, output the preset data to the control module, and calculate the carbon monoxide diffusion data based on the preset data, and compare it with the results of the diffusion spirometer. The terminal module can be an entity capable of issuing instructions, such as a computer with a CPU, buttons, a mouse, a screen, etc. Preset test data can be input through manual operation and output the preset data to the control module. The CPU can calculate the standard DLCO data under the conditions of the preset data based on the known DLCO calculation formula and the preset data. The standard DLCO data is then compared with the results displayed by the diffusion spirometer to analyze whether there is any deviation in the test results of the diffusion spirometer.

[0046] The control module is used to receive preset data and control the operation of the air supply module based on the preset data. The control module receives instructions from the terminal module and controls the opening and closing of the air supply module to achieve breathing simulation under the preset data.

[0047] The air supply module is connected to the diffusion spirometer and is used to simulate the breathing process according to preset data. The air supply module can be a physical entity that can output and contain gas to simulate human breathing. Specifically, the breathing process includes calm breathing, full exhalation, rapid inhalation, breath holding, and moderate and constant exhalation. The air supply module simulates the entire test process from the outside of the diffusion spirometer to obtain the test results of the diffusion spirometer under specific data.

[0048] Through the above-mentioned test system, the test parameters can be preset to simulate the human body's diffusion function test process, and the results of the diffusion spirometer can be compared with the standard DLCO data to verify whether the test results of the diffusion spirometer are accurate, thereby calibrating the diffusion spirometer.

[0049] The air supply module in this application includes a breathing simulation module, an inhalation gas supply module, and an exhalation gas supply module. The diffusion spirometer includes an air inlet and an air outlet. The breathing simulation module, the inhalation gas supply module, and the exhalation gas supply module are all connected to the air inlet. Gas input into the diffusion spirometer is discharged through the air outlet. The breathing simulation module, the inhalation gas supply module, and the exhalation gas supply module operate according to the steps of the diffusion test, providing and accommodating gas for different steps to simulate the breathing process.

[0050] Specifically, the breathing simulation module is used to output fixed-frequency inspiration and exhalation, complete exhalation, and rapid inspiration to the diffusion spirometer. The breathing simulation module, the air inlet, and the air outlet form a first gas passage. The breathing simulation module supplies air in the first step of the test, quiet breathing, to simulate the calm breathing of the subject. The gas provided in this step is air. The values ​​of tidal volume and residual volume can be arbitrarily selected from the clinical extremes. The cycle of quiet breathing can be set to 4 to 5 times, and then the second step of complete exhalation is performed to exhale to the residual volume. In the above-mentioned first and second steps, the first gas passage is always connected, and the breathing simulation module inhales and exhales air.

[0051] The inhalation gas supply module is used to output the gas during rapid inhalation to the diffusion spirometer. The inhalation gas supply module, the air inlet and the breathing simulation module form a second gas path. The inhalation gas supply module supplies gas during the third step of the test, rapid inhalation. In this step, the second gas path is connected, and the inhalation gas supply module provides the required gas, which is inhaled into the breathing simulation module through the diffusion spirometer, thereby simulating the rapid inhalation step. The gas in this step is the gas inhaled during rapid inhalation before holding the breath in the diffusion test step. The components include 0.3% CO, 0.3% CH4 (for tracing) and 21% O2, and the rest is N2. In this step, the inhalation is complete to the total lung capacity, and the total lung capacity value can be selected arbitrarily from the clinical extremes. The fourth step of breath holding is then performed, and the breath holding time can be selected according to the test requirements.

[0052] The exhaled gas supply module is used to output gas during uniform exhalation to the diffusion spirometer. The exhaled gas supply module, the air inlet, and the air outlet form a third gas path. The exhaled gas supply module provides gas during the uniform exhalation in the fifth step of the test. The gas composition output to the diffusion spirometer is 5% CO2, 21% O2, 0.08% to 0.13% CO, 0.16% to 0.22% CH4, and the remainder is N2. The residual volume in this step is the same as in the first step, and the breathing duration is set according to the test requirements. The accuracy of the above gas components should be within ±1%.

[0053] In the fifth step, the completely exhaled gas during the medium-speed uniform exhalation is divided into three types of concentrations: high concentration, medium concentration, and low concentration. The settings of the above three gases are distinguished by the concentration differences of CO and tracer gas CH4. The concentration values ​​of CO and CH4 in the three gases are shown in the following table.

[0054] <![CDATA[CH4 concentration]]> CO concentration High concentration 0.22 and above 0.08-0.1 (excluding 0.1) Medium concentration 0.2-0.22 (excluding 0.22) 0.1-0.13 (excluding 0.13) Low concentration 0.16-0.2 (excluding 0.2) 0.13 and above

[0055] In a specific test process, any value within the numerical range of high concentration, medium concentration and low concentration can be selected, covering multiple tests of the three categories, so as to conduct a comprehensive accuracy verification of the diffusion spirometer.

[0056] The control module in this application is used to control the operation of the breathing simulation module, the inhalation gas supply module and the exhalation gas supply module, and to open and close them according to different test data in the test steps. It is also used to control the opening and closing of the first gas passage, the second gas passage and the third gas passage. In the first and second steps of the test, only the first gas passage is opened, and the rest are closed. In the third step of the test, only the second gas passage is opened, and the rest are closed. In the fourth step of the test, the first gas passage, the second gas passage and the third gas passage are all closed. In the fifth step of the test, only the third gas passage is opened, and the rest are closed.

[0057] The preset data in this application include tidal volume, tidal breathing cycle, residual volume, inspiratory volume, inspiratory time, breath-holding time, expiratory time and the composition of exhaled gas during the exhalation time, covering the entire process of pulmonary diffusion function test. Specifically, the range of tidal volume is set to 200-800ml, the tidal breathing cycle is 15-40 times per minute, the rapid inspiratory volume IVC value is 2-5L, the rapid inspiratory time is 1-4s, the breath-holding time is 7s-15s, the complete exhalation time is 2-4s, and the composition of exhaled gas during the exhalation time can be arbitrarily selected from the above-mentioned high-concentration, medium-concentration and low-concentration gases. The above data are common data in human breathing in clinical practice, and the upper and lower limits of the interval are both extreme values ​​in the human breathing process to cover all situations in the test. In the specific test process, the above data can be arbitrarily combined to conduct a comprehensive test of the diffusion spirometer.

[0058] To address the technical problem, the present invention also provides a diffusion spirometer test device. Utilizing the aforementioned diffusion spirometer test system, the test device operates by simulating a person's lung diffusion function in an external environment, presetting test data, and performing a simulated test on the diffusion spirometer according to the pre-set data. The test data from the diffusion spirometer is then compared with standard data calculated by the test system to determine the test accuracy of the diffusion spirometer, thereby calibrating the diffusion spirometer. The standard data calculated by the test system is obtained according to the DLCO calculation formula.

[0059] For details, please refer to Figure 3 and Figure 4 The test device includes a terminal host, a controller, and an air supply mechanism. The terminal host includes an input panel, a CPU, and a display screen. The input panel is used to input preset data. The CPU calculates lung carbon monoxide diffusion data based on the preset data and compares it with the results of the diffusion spirometer. The display screen is used to display the calculated results. The controller is electrically connected to the terminal host and is used to control the operation of the air supply mechanism according to the preset data. The air supply mechanism is connected to the diffusion spirometer and is used to supply gas to the diffusion spirometer according to the preset data.

[0060] Specifically, the air supply mechanism includes a breathing simulation cylinder, an inhalation gas storage chamber, and an exhalation gas supply cylinder, which are all connected to the diffusion spirometer. The breathing simulation cylinder, the inhalation gas storage chamber, and the exhalation gas supply cylinder can draw air and exhaust it outward to simulate the process of human inhalation and exhalation. The inhalation gas storage chamber and the exhalation gas supply cylinder also store gases that meet the test standards. The gas composition provided by the inhalation gas storage chamber includes 0.3% CO, 0.3% CH4 (for tracing), and 21% O2, with the remainder being N2. The gas composition provided by the exhalation gas supply cylinder is 5% CO2, 21% O2, 0.08% to 0.13% CO, 0.16% to 0.22% CH4, and the remainder being N2.

[0061] The breathing simulation cylinder has a total volume of 5L and is a high-precision cylinder with an accuracy of ±0.5%. The cylinder volume is uniform, and the volume of gas pushed out can be calculated based on the length of the push. This is used for calm breathing before breath holding, full exhalation, and rapid inhalation. The average adult vital capacity is approximately 3500-4000ml for men and 2500-3500ml for women. Regular athletes can have a vital capacity of up to 5000ml. Since this cylinder needs to simulate full breathing movements, a 5L volume was selected.

[0062] The exhaled gas supply cylinder has a total volume of 2L and is a high-precision cylinder with an accuracy of ±0.5%. Its volume is uniform, and the volume of gas pushed out can be calculated based on the length of the push, allowing for complete exhalation after breath-holding. The volume of gas pushed out by this cylinder is not included in the calculation, so its volume only needs to meet the sampling volume. The typical exhaled gas volume is 0.75-1.0L, and the analytical gas sampling volume is 0.5-1.0L. At this stage, approximately 2L of exhaled gas is sufficient, so a 2L volume is selected.

[0063] The gas supply mechanism also includes multiple gas storage chambers, each connected to the exhaled gas supply cylinder. These chambers are used to store the fully exhaled gas from the uniformly exhaled gas phase in step 5, including the aforementioned high, medium, and low concentrations. Therefore, at least three gas storage chambers are provided, storing high, medium, and low concentration gases, respectively. This allows for multiple tests to cover a wider range of test conditions, encompassing gases of varying concentrations.

[0064] The breathing simulation cylinder, inhalation gas storage tank and exhalation gas supply cylinder in this application are all equipped with pushers to transport gas into the diffusion spirometer to simulate exhalation and store gas to simulate inhalation. The controller is used to control the push and pull operation of the pusher to simulate the breathing process according to the test steps.

[0065] In the present application, a first valve is provided between the breathing simulation gas cylinder and the diffusion spirometer, a second valve is provided between the inhaled gas storage chamber and the diffusion spirometer, a third valve is provided between the exhaled gas supply gas cylinder and the diffusion spirometer, and a fourth valve is provided between the gas storage chamber and the exhaled gas supply gas cylinder. The controller is also used to control the opening and closing of the first valve, the second valve, the third valve and the fourth valve.

[0066] Specifically, before the first step of the test, the fourth valve is opened to transfer the gas from the gas storage bin to the exhaled gas supply cylinder. In the first and second steps of the test, only the first valve and the air outlet of the diffusion spirometer are opened, and the rest are closed, so that a circulation is formed between the breathing simulation cylinder and the external air to simulate breathing. In the third step of the test, only the second valve is opened, and the rest are closed, so that the gas from the inhaled gas storage bin is inhaled into the breathing simulation cylinder through the diffusion spirometer, simulating the rapid inhalation step of the human body. In the fourth step of the test, the first valve, the second valve, the third valve and the fourth valve are all closed. In the fifth step of the test, only the third valve and the air outlet of the diffusion spirometer are opened, and the rest are closed, so that the gas in the exhaled gas supply cylinder is discharged through the diffusion spirometer, simulating the uniform exhalation step.

[0067] The working process of the test device of the diffusion spirometer of the present application is as follows:

[0068] 1. Set the test data on the terminal host's input panel. The tidal volume range is set to 200-800ml, the tidal breathing cycle is set to 15-40 times per minute, the rapid inspiratory volume IVC value is set to 2-5L, the rapid inspiratory time is set to 1-4s, the breath-holding time is set to 7s-15s, and the complete exhalation time is set to 2-4s. The composition of the exhaled gas during the exhalation time can be arbitrarily selected from the high-concentration, medium-concentration, and low-concentration gases mentioned above. The above data are commonly used in clinical practice, and the upper and lower limits of the interval are based on common human data to cover all situations in the test. During the specific test process, the above data can be arbitrarily combined to conduct a comprehensive test of the diffusion spirometer.

[0069] 2. Start the device and select different concentrations of complete exhaled gas. Taking high concentration as an example, the fourth valve is opened and the other valves are closed. The exhaled gas supply cylinder is driven to move so that the gas in the corresponding gas storage chamber is filled into this cylinder.

[0070] 3. Entering the quiet breathing phase, the first valve opens, connecting the diffusion spirometer to the breathing simulation cylinder. The instrument's outlet opens, and all other valves close. The breathing simulation cylinder pushes and pulls according to the preset tidal volume and tidal breathing cycle in the test data, simulating breathing.

[0071] 4. Entering the complete exhalation stage, the valve switch remains unchanged, and the breathing simulation air cylinder is driven to push and pull according to the complete exhalation volume EVC value in the preset test data.

[0072] 5. Enter the rapid inhalation stage: At this time, the second valve is opened, the other valves and the air outlet of the diffusion spirometer are closed, the inhalation gas storage chamber is connected to the breathing simulation gas cylinder, and the inhalation gas storage chamber and the breathing simulation gas cylinder are driven to push and pull according to the rapid inhalation volume IVC and inhalation time in the preset test data.

[0073] 6. Enter the breath-holding stage: At this time, all valves are closed, all air cylinders do not move, and the countdown begins according to the breath-holding time in the preset test data.

[0074] 7. Enter the medium-speed complete exhalation stage: At this time, the third valve and the air outlet of the diffusion spirometer are opened, the other valves are closed, the exhaled gas supply cylinder is connected to the diffusion spirometer, and other channels are closed. Push the exhaled gas supply cylinder to deliver gas to the diffusion spirometer until the set residual volume position is reached, and the entire test is completed.

[0075] 8. After the test is complete, the terminal host calculates the DLCO and VA values ​​for the test process based on the preset test data and calculation formula, and compares them with the values ​​measured by the diffusion spirometer. If there is a deviation between the two, the diffusion spirometer needs to be calibrated.

[0076] 9. Continue to repeat steps 1-8 above with different preset data and perform multiple tests. The preset data can cover the extreme values ​​and the median between the extreme values.

[0077] The test system and test device of the diffusion spirometer of the present invention are used to simulate the entire diffusion function test of the human body, and key parameters such as the concentration of alveolar carbon monoxide and tracer gas after breath holding, the amount of inhaled gas, and the breath holding time can be preset. Based on this, reference values ​​of the key parameters tested by the pulmonary diffusion function can be calculated and compared with the results of the diffusion spirometer to verify the correctness and accuracy of the calculation of the parameters tested by the pulmonary diffusion function, thereby calibrating the diffusion spirometer.

[0078] The above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A test system for a diffusion spirometer, used for testing a diffusion spirometer, characterized in that: The test system includes a terminal module, a control module and a gas supply module; The terminal module is used to input preset data, output the preset data to the control module, and calculate the lung carbon monoxide diffusion data based on the preset data, and compare it with the result of the diffusion spirometer; The control module is used to receive the preset data and control the operation of the gas supply module according to the preset data; The air supply module is connected to the diffusion spirometer and is used to simulate the breathing process according to the preset data; The air supply module includes a breathing simulation module, an inhaled gas supply module and an exhaled gas supply module, the diffusion spirometer includes an air inlet and an air outlet, and the breathing simulation module, the inhaled gas supply module and the exhaled gas supply module are all connected to the air inlet; The breathing simulation module is used to output fixed-frequency inspiration and exhalation, complete exhalation, and rapid inspiration to the diffusion spirometer, and the breathing simulation module, the air inlet, and the air outlet form a first gas passage; The inhalation gas supply module is used to output the gas during rapid inhalation to the diffusion spirometer, and the inhalation gas supply module, the air inlet and the breathing simulation module form a second gas passage; The exhaled gas supply module is used to output the gas during uniform exhalation to the diffusion spirometer, and the exhaled gas supply module, the air inlet and the air outlet form a third gas passage; The breathing process includes calm breathing, complete exhalation, rapid inhalation, breath holding and moderate-speed uniform exhalation in sequence. During calm breathing and complete exhalation, the control module controls the first gas passage to open, and the second gas passage and the third gas passage to close; during rapid inhalation, the control module controls the second gas passage to open, and the first gas passage and the third gas passage to close; when holding the breath, the control module controls the first gas passage, the second gas passage and the third gas passage to close; during moderate-speed uniform exhalation, the control module controls the third gas passage to open, and the first gas passage and the second gas passage to close.

2. The test system of the diffusion spirometer according to claim 1, characterized in that: The gas output by the breathing simulation module is air; the gas output by the inhalation gas supply module contains 0.3% CO, 0.3% CH4, 21% O2, and the rest is N2; the gas output by the exhalation gas supply module contains 5% CO2, 21% O2, 0.08% to 0.13% CO, 0.16% to 0.22% CH4, and the rest is N2.

3. The test system of the diffusion spirometer according to claim 1, characterized in that: The control module is used to control the operations of the breathing simulation module, the inhalation gas supply module, and the exhalation gas supply module.

4. The diffusion spirometer test system according to any one of claims 1 to 3, characterized in that: The preset data include tidal volume, tidal breathing cycle, residual volume, inspiratory volume, inspiratory time, breath-holding time, exhalation time and components of exhaled gas during the exhalation time.

5. A test device for a diffusion spirometer, using the test system for a diffusion spirometer according to any one of claims 1 to 4, characterized in that: The testing device includes a terminal host, a controller and an air supply mechanism; The terminal host includes an input panel, a CPU and a display screen, wherein the input panel is used to input preset data, the CPU calculates lung carbon monoxide diffusion data based on the preset data and compares it with the result of the diffusion spirometer, and the display screen is used to display the calculation result; The controller is electrically connected to the terminal host and is used to control the operation of the gas supply mechanism according to the preset data; The gas supply mechanism is connected to the diffusion spirometer and is used to supply gas to the diffusion spirometer according to the preset data, wherein the supplied gas simulates the breathing process; The air supply mechanism includes a breathing simulation air cylinder, an inhaled gas storage chamber and an exhaled gas supply air cylinder, and the breathing simulation air cylinder, the inhaled gas storage chamber and the exhaled gas supply air cylinder are all connected to the diffusion spirometer; The gas supply mechanism further comprises a plurality of gas storage chambers, each of which is connected to the exhaled gas supply cylinder; The breathing process includes calm breathing, complete exhalation, rapid inhalation, breath holding and medium-speed uniform exhalation in sequence. During calm breathing and complete exhalation, the breathing simulation air cylinder pushes and pulls; during rapid inhalation, the inhaled gas storage chamber is connected to the breathing simulation air cylinder, and the breathing simulation air cylinder pushes and pulls; when holding the breath, the breathing simulation air cylinder and the exhaled gas supply air cylinder are stationary; during medium-speed uniform exhalation, the exhaled gas supply air cylinder is pushed.

6. The test device for the diffusion spirometer according to claim 5, characterized in that: The breathing simulation cylinder, the inhaled gas storage chamber and the exhaled gas supply cylinder are all provided with pushers, and the controller is used to control the operation of the pushers.

7. The test device for the diffusion spirometer according to claim 6, characterized in that: A first valve is provided between the breathing simulation gas cylinder and the diffusion spirometer, a second valve is provided between the inhaled gas storage tank and the diffusion spirometer, a third valve is provided between the exhaled gas supply gas cylinder and the diffusion spirometer, and a fourth valve is provided between the gas storage tank and the exhaled gas supply gas cylinder. The controller is also used to control the opening and closing of the first valve, the second valve, the third valve and the fourth valve.

Images