A pulmonary function breathing sampling device for the department of respiratory medicine

Abstract

The present invention discloses a pulmonary function respiratory sampling device for the department of respiratory medicine, which relates to the technical field of sampling in respiratory medicine. It includes a gas collecting pipe, one end of the gas collecting pipe is fixedly connected with a connecting mouth, the other end of the gas collecting pipe is provided with an air outlet head, a respiratory interface is clamped inside the connecting mouth, and it further includes a saliva separation mechanism. The saliva separation mechanism includes a diversion pipe arranged inside the gas collecting pipe. Inside the diversion pipe, there are a variable flow channel and a return flow channel that are interconnected. A water-absorbing cloth is arranged at the connection of the variable flow channel and the return flow channel. A first sealing unit is arranged inside the respiratory interface. Through the saliva separation mechanism, this application avoids saliva from entering the inside of the gas collecting pipe together with the exhaled gas, thereby ensuring the purity of the sample and significantly improving the authenticity of the subsequent test results. Moreover, before and after respiratory sampling, the air inlet of the gas collecting pipe is sealed by the first sealing unit and the second sealing unit, effectively preventing external gas from entering the inside of the gas collecting pipe during the sampling process.

Description

Technical Field

[0001] The present invention relates to the technical field of respiratory medicine sampling, and particularly to a pulmonary function respiratory sampling device for the respiratory department. Background Art

[0002] A respiratory sampling device is a medical tool used to collect exhaled gas samples to evaluate lung function and diagnose related diseases. By detecting and analyzing exhaled samples, the physiological and pathological states of the human body can be evaluated. For example, detecting components such as nitric oxide, volatile organic compounds (VOCs), and ketone bodies in exhaled breath can assist in diagnosing diseases such as asthma, chronic obstructive pulmonary disease (COPD), and diabetes, monitor airway inflammation, metabolic levels, and treatment responses, and can also be used for screening infectious diseases, monitoring drug concentrations, etc., providing key data support for early disease detection, efficacy evaluation, and health management.

[0003] Traditional respiratory sampling devices consist of a respiratory interface and a gas collection container. During use, the respiratory interface is installed on the gas collection container, and breathing sampling is achieved by blowing air into the container through the respiratory interface. During the sampling process, saliva in the user's mouth easily enters the container along with the exhaled gas, and microorganisms, enzymes, and chemical substances in the saliva will mix into the exhaled sample, interfering with the detection of gas components. For example, bacterial metabolism in saliva may produce additional carbon dioxide or ammonia, resulting in the test results deviating from the true alveolar gas components. Therefore, it is urgent to improve the existing respiratory sampling device. Summary of the Invention

[0004] The purpose of the present invention is to propose a pulmonary function respiratory sampling device for the respiratory department to solve the problem that saliva in the user's mouth easily enters the container along with the exhaled gas during the respiratory sampling process, resulting in the test results deviating from the true alveolar gas components.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A pulmonary function respiratory sampling device for the respiratory department includes a gas collection pipe, one end of the gas collection pipe is fixedly connected with a connecting mouth, the other end of the gas collection pipe is provided with an air outlet head, a respiratory interface is clamped inside the connecting mouth, and further includes:

[0006] A saliva separation mechanism, the saliva separation mechanism includes a diversion pipe arranged inside the gas collection pipe, a variable flow channel and a return flow channel that are interconnected are arranged inside the diversion pipe, a water absorption cloth is arranged at the connection of the variable flow channel and the return flow channel, a first sealing unit is arranged inside the respiratory interface, a second sealing unit is arranged inside the gas collection pipe, a connection component is arranged between the respiratory interface and the diversion pipe, and a sealing film is arranged at the air inlet of the gas collection pipe;

[0007] The exhaled air flow is accelerated through the variable flow channel of the diversion pipe and then returns, and the water absorption cloth adsorbs the saliva separated by inertia in the air flow.

[0008] As a further description of the above technical solution: The first sealing unit includes a plastic tube fixed inside the breathing interface, and a one-way diaphragm is fixed to the inner wall of the plastic tube. The second sealing unit includes an outer tube slidably connected inside the gas collecting tube, and a sealing plug is fixed to one end of the outer tube.

[0009] As a further description of the above technical solution: Plastic sheets are fixed to both the top and bottom of the breathing interface.

[0010] As a further description of the above technical solution: The connecting component includes an insertion tube fixed to one end of the breathing interface. A ring is fixed to one side of the sealing plug, and a first clamping pin and a second clamping pin for clamping the guide tube are respectively fixed to the inner walls of the insertion tube and the ring.

[0011] As a further description of the above technical solution: Both sides of the first clamping pin are inclined. When the guide tube is rotated, the first clamping pin embedded in the outer wall of the guide tube is disengaged from the clamping connection with the guide tube.

[0012] As a further description of the above technical solution: It further includes a separating mechanism. An inner tube inserted into the outer tube is rotatably connected inside the gas collecting tube. At least one first baffle is fixed to the inner wall of the gas collecting tube, and a second baffle with the same number as the first baffle is fixed to the outside of the outer tube.

[0013] As a further description of the above technical solution: The air outlet head is slidably connected inside the inner tube, and a spring is provided between the air outlet head and the inner tube.

[0014] As a further description of the above technical solution: An air outlet hole communicating with the inside of the inner tube is formed in the middle of the air outlet head, and a rubber membrane is fixed inside the air outlet hole. The first baffle and the second baffle divide the inside of the gas collecting tube into multiple independent spaces, and ventilation holes communicating with each space are formed in the outer tube.

[0015] As a further description of the above technical solution: A strip-shaped hole is formed in the inner tube, and the inner tube can be sequentially and separately communicated with each ventilation hole on the outer tube through deflection.

[0016] In summary, due to the adoption of the above technology, for a pulmonary function breathing sampling device in the respiratory department, the beneficial effects of the present invention are:

[0017] First, during sampling, the saliva separation mechanism of the present application separates and captures saliva in the exhaled gas, preventing saliva from entering the inside of the gas collection pipe along with the exhaled gas and interfering with the detection of gas components, thereby ensuring the purity of the sample and significantly improving the authenticity of subsequent test results. Moreover, before and after respiratory sampling, the present application seals the air inlet of the gas collection pipe through the first sealing unit and the second sealing unit, effectively preventing external gas from entering the inside of the gas collection pipe during sampling and further improving the sampling effect.

[0018] Second, considering the clinical characteristics of patients with chronic obstructive pulmonary disease (COPD) who generally have difficulty exhaling and significantly increased airway resistance, while the first sealing unit in the present application plays a sealing role, it can also be automatically opened by relying on the natural biting force of the patient, reducing the resistance that the patient needs to overcome during exhalation and effectively alleviating the respiratory work load. This design not only significantly improves the comfort of COPD patients during sampling but also ensures the integrity and accuracy of respiratory sample collection.

[0019] Third, after respiratory sampling is completed, the present application can divide the inside of the gas collection pipe into multiple independent spaces through the partitioning mechanism and can separately access the respiratory samples in each space. This design can meet scenarios such as sample detection retention and multiple access requirements, improving the flexibility of subsequent test use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 shows the overall schematic diagram provided according to an embodiment of the present invention;

[0021] Figure 2 shows the exploded view of the respiratory interface provided according to an embodiment of the present invention;

[0022] Figure 3 shows the cross-sectional schematic diagram of the respiratory interface provided according to an embodiment of the present invention;

[0023] Figure 4 shows the cross-sectional schematic diagram of the gas collection pipe provided according to an embodiment of the present invention;

[0024] Figure 5 shows the one provided according to an embodiment of the present invention Figure 4 enlarged view at A in;

[0025] Figure 6 shows the exploded view of the diversion pipe provided according to an embodiment of the present invention;

[0026] Figure 7 shows the cross-sectional schematic diagram of the diversion pipe provided according to an embodiment of the present invention;

[0027] Figure 8 shows the one provided according to an embodiment of the present invention Figure 7 enlarged view at C in;

[0028] Figure 9 shows the enlarged view at position B in Figure 4 ;

[0029] Figure 10 shows the schematic diagram of the air flow direction of the diversion tube provided according to an embodiment of the present invention;

[0030] Figure 11 shows the enlarged view at position D in Figure 10 ;

[0031] Figure 12 shows the schematic diagram of the air flow direction of the air outlet head provided according to an embodiment of the present invention;

[0032] Figure 13 shows the schematic diagram of the positional relationship between the inner tube and the outer tube provided according to an embodiment of the present invention.

[0033] Legend:

[0034] 10, gas collecting pipe; 11, connecting nozzle; 12, breathing interface; 13, air outlet head;

[0035] 20, saliva separation mechanism; 21, diversion tube; 22, water absorption cloth; 23, first sealing unit; 231, plastic tube; 232, one-way diaphragm; 233, plastic sheet; 24, connecting component; 241, inserting tube; 242, first latch; 243, circular ring; 244, second latch; 25, second sealing unit; 251, outer tube; 252, sealing plug;

[0036] 30, separation mechanism; 31, inner tube; 32, first baffle; 33, second baffle; 34, spring; 35, rubber film. Detailed implementation manners

[0037] Next, the technical solution of a pulmonary function breathing sampling device in the respiratory department of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

[0038] As Figures 1 - 13As shown in the figure, a pulmonary function breathing sampling device for the department of respiratory medicine provided by the present invention includes a gas collecting pipe 10. One end of the gas collecting pipe 10 is fixedly connected with a connecting nozzle 11. A sealing film is provided at the air inlet of the gas collecting pipe 10 to keep the gas collecting pipe 10 in a sealed state before breathing sampling to prevent external substances from entering. The other end of the gas collecting pipe 10 is provided with an air outlet head 13. A breathing interface 12 is clamped inside the connecting nozzle 11. During breathing sampling, the breathing interface 12 is clamped and installed with the connecting nozzle 11, and through the breathing interface 12, it is convenient for the user to exhale gas into the gas collecting pipe 10. After sampling, the breathing interface 12 is removed to avoid contamination of the sample by residual substances such as saliva.

[0039] Refer to Figure 7 and Figure 8 In order to eliminate the interference of saliva on the breathing sample, it further includes a saliva separation mechanism 20. The saliva separation mechanism 20 includes a diversion pipe 21 arranged inside the gas collecting pipe 10. The inside of the diversion pipe 21 is provided with a variable flow channel and a return flow channel that are interconnected. A water-absorbing cloth 22 is provided at the connection of the variable flow channel and the return flow channel. The exhaled air flow is accelerated through the variable flow channel of the diversion pipe 21 and then returns. The water-absorbing cloth 22 adsorbs the saliva separated by inertia in the air flow. The diameter of the variable flow channel gradually decreases from the outside to the inside to gradually increase the flow rate of the exhaled gas, so that the saliva in the air flow is more likely to contact the water-absorbing cloth 22 under the action of inertia. The water-absorbing cloth 22 is bowl-shaped and the inner wall is provided with a retention groove to prevent the adsorbed saliva from being blown into the gas collecting pipe 10 by the air flow.

[0040] Refer to Figure 3 Inside the breathing interface 12, a first sealing unit 23 is provided. The first sealing unit 23 includes a plastic pipe 231 fixed inside the breathing interface 12. A one-way membrane flap 232 is fixed on the inner wall of the plastic pipe 231. The one-way membrane flap 232 is used to make the air flow enter the inside of the plastic pipe 231 only unidirectionally, to prevent external air from entering the gas collecting pipe 10 through the plastic pipe 231 after the breathing interface 12 is connected to the gas collecting pipe 10.

[0041] Refer to Figure 4 and Figure 5 Inside the gas collecting pipe 10, a second sealing unit 25 is provided. The second sealing unit 25 includes an outer pipe 251 slidably connected inside the gas collecting pipe 10. A sealing plug 252 is fixed at one end of the outer pipe 251. After the breathing interface 12 is pulled out after breathing sampling, the sealing plug 252 can seal the damaged air inlet of the gas collecting pipe 10, thus avoiding sample leakage and preventing external gas from contaminating the sample.

[0042] Considering the clinical characteristics of patients with chronic obstructive pulmonary disease (COPD) who generally have difficulty in exhaling and significantly increased airway resistance, plastic sheets 233 are fixed to both the top and bottom of the breathing interface 12. Both the plastic tube 231 and the plastic sheet 233 are elastic. When the patient holds the breathing interface 12 during respiratory sampling, the plastic sheet 233 can squeeze the plastic tube 231 through the biting force. The plastic tube 231 deforms to open the one-way membrane flap 232, thereby weakening the blockage of the one-way membrane flap 232 to the airflow, reducing the resistance that the patient needs to overcome during exhalation, effectively relieving the respiratory work load, and improving the comfort of COPD patients during the sampling process.

[0043] Refer to Figure 5 and Figure 6 In order to prevent the evaporated separated saliva from mixing back into the respiratory sample again, a connecting component 24 is provided between the breathing interface 12 and the diversion tube 21. The connecting component 24 includes an intubation tube 241 fixed to one end of the breathing interface 12. After the breathing interface 12 is installed in the connecting nozzle 11, the intubation tube 241 pierces the sealing film at the air inlet of the gas collecting tube 10 and is sleeved outside the diversion tube 21. A circular ring 243 is fixed to one side of the sealing plug 252. A first retaining pin 242 and a second retaining pin 244 that are clamped with the diversion tube 21 are respectively fixed to the inner walls of the intubation tube 241 and the circular ring 243. Both the first retaining pin 242 and the second retaining pin 244 are made of elastic plastic and achieve clamping and detachment with the diversion tube 21 through their own deformation ability.

[0044] When the breathing interface 12 is pulled out of the connecting nozzle 11, the intubation tube 241 pulls the diversion tube 21 outwards through the first retaining pin 242. The diversion tube 21 drives the circular ring 243 and the sealing plug 252 to move towards the air inlet of the gas collecting tube 10 through the second retaining pin 244 until the sealing plug 252 seals the air inlet. At this time, the sealing plug 252 and the circular ring 243 cannot move any further under the support of the gas collecting tube 10. The diversion tube 21 causes the second retaining pin 244 to disengage from the slot of the diversion tube 21 under the pulling force, and then the diversion tube 21 is pulled out of the interior of the gas collecting tube 10 together with the intubation tube 241, preventing the saliva collected in the diversion tube 21 from continuously contacting the respiratory sample in the gas collecting tube 10 and ensuring the purity of the respiratory sample.

[0045] The two sides of the latch 242 are tilted, and when the guide tube 21 is rotated, the latch 242 embedded in the outer wall of the guide tube 21 is disengaged from the guide tube 21. At this time, the guide tube 21 can be pulled out from the inside of the cannula 241 and used as an independent saliva sample, and the respiratory interface 12 and the cannula 241 can be disinfected and put into use again. It is worth mentioning that at this time, pushing the guide tube 21 into the inside of the cannula 241 can also enable the cannula 241 to seal the return flow channel of the guide tube 21. At this time, the plastic tube 231 and the one-way membrane flap 232 seal the other opening of the guide tube 21, so that the guide tube 21 is in a sealed state, preventing the saliva inside the guide tube 21 from contaminating the external environment, or being contaminated by external substances when the guide tube 21 is used as a saliva sample.

[0046] Reference Figure 10 In order to enable a single sampling to be used multiple times and improve convenience, a separation mechanism 30 is also included. The interior of the gas collecting pipe 10 is rotatably connected to an inner tube 31 inserted into the outer tube 251. The inner wall of the gas collecting pipe 10 is fixedly connected to at least one baffle 1 32. The outside of the outer tube 251 is fixed with the same number of baffles 2 33 as the baffles 1 32. The spacing between each baffle 1 32 and the adjacent baffle 2 33 is the same. In the process of pulling out the breathing interface 12 to drive the sealing plug 252 to move, the outer tube 251 drives the baffle 2 33 to move. After each baffle 2 33 is in contact and sealed with the baffle 1 32, several baffles 2 33 and baffle 1 32 separate the internal space of the gas collecting pipe 10 into multiple independent spaces, so that the respiratory sample inside the gas collecting pipe 10 is divided into multiple parts for separate use.

[0047] It is worth mentioning that the staggered baffles 1 32 and 2 33 can also play a turbulent role during respiratory sampling, increase the complexity of the internal flow channel of the gas collecting tube 10, thereby improving the uniformity of the gas inside the gas collecting tube 10, and prolong the residence time of the exhaled gas in the gas collecting tube 10, thereby improving the capture rate of the respiratory sample.

[0048] Reference Figure 9 and Figure 11 The air outlet head 13 is slidably connected to the inside of the inner tube 31. A spring 34 is provided between the air outlet head 13 and the inner tube 31. A circular hole connected to the air outlet of the gas collecting pipe 10 is opened at one end of the inner tube 31. When the air outlet head 13 blocks the circular hole of the inner tube 31, the gas inside the gas collecting pipe 10 cannot be discharged from the air outlet through the circular hole; when the air outlet head 13 is pressed to retract it into the inner tube 31, the circular hole of the inner tube 31 is opened, and the gas inside the gas collecting pipe 10 can be discharged from the air outlet through the circular hole. This design can control the opening and closing of the air outlet of the gas collecting pipe 10 only by pressing the air outlet head 13, thereby improving the convenience of using the device.

[0049] Reference Figure 12 and Figure 13, in order to independently access each part of the sample after the sample inside the gas collecting pipe 10 is divided into multiple parts, an air outlet hole communicating with the inside of the inner pipe 31 is provided in the middle of the air outlet head 13, and a rubber membrane 35 is fixed inside the air outlet hole. Ventilation holes communicating with each space are provided on the outer pipe 251, and strip-shaped holes are provided on the inner pipe 31. Rotating the air outlet head 13 can drive the inner pipe 31 to rotate. The inner pipe 31 can be deflected to sequentially and separately communicate with each ventilation hole on the outer pipe 251 through the strip-shaped holes, realizing the independent access of each part of the sample inside the gas collecting pipe 10. During detection, the rubber membrane 35 can be penetrated through an external connector to detect the breathing sample inside the gas collecting pipe 10. If the sample does not need to be divided, an external connector is inserted into the air inlet of the gas collecting pipe 10 to push the sealing plug 252 into the inside of the gas collecting pipe 10. The sealing plug 252 no longer seals the air inlet of the gas collecting pipe 10. At this time, the internal spaces of the gas collecting pipe 10 are merged again, facilitating the direct access of the sample.

[0050] Working principle: In the initial state, the air inlet of the gas collecting pipe 10 is closed by a sealing film, and the air outlet head 13 closes the air outlet of the gas collecting pipe 10;

[0051] Before sampling, the intubation tube 241 is inserted into the air inlet of the gas collecting pipe 10. The intubation tube 241 pierces the sealing film and extends into the inside of the gas collecting pipe 10 to be sleeved outside the diversion tube 21. The breathing interface 12 is inserted into the inside of the connecting nozzle 11. After the breathing interface 12 is clamped with the connecting nozzle 11, the intubation tube 241 is clamped with the diversion tube 21 through the first latch 242;

[0052] During sampling, the user first presses the air outlet head 13 so that the air outlet head 13 no longer closes the round hole of the inner pipe 31. At this time, the internal space of the gas collecting pipe 10 communicates with the outside through the round hole and the air outlet. Then the breathing interface 12 is put into the mouth and the user blows outwards. The blown air flow pushes open the one-way membrane flap 232. The air flow passes through the plastic tube 231, the intubation tube 241, the variable cross-section flow channel and the return flow channel of the diversion tube 21 in sequence and then enters the gas collecting pipe 10. The user continues to blow. The exhaled gas passes through the gas collecting pipe 10 and is ejected outwards from the air outlet. The first baffle 32 and the second baffle 33 block the exhaled gas, so that the exhaled gas is retained inside the gas collecting pipe 10;

[0053] After the exhaled gas is accelerated through the variable cross-section flow channel of the diversion tube 21, it enters the gas collecting pipe 10 through the return flow channel. During this process, the saliva in the air flow will contact the water-absorbing cloth 22 under the action of inertia, and the water-absorbing cloth 22 adsorbs the saliva to separate the saliva from the breathing sample;

[0054] After sampling, stop blowing air and loosen the air outlet head 13. The air outlet head 13 closes the round hole of the inner tube 31, closing the air outlet of the gas collecting pipe 10. Then, pull out the breathing interface 12 and the intubation tube 241. When the intubation tube 241 is pulled out, it drives the diversion tube 21 to move outwards through the first detent 242. The diversion tube 21 drives the circular ring 243 and the sealing plug 252 to move towards the air inlet of the gas collecting pipe 10 through the second detent 244 until the sealing plug 252 seals the air inlet. At this time, the sealing plug 252 and the circular ring 243 cannot move anymore under the support of the gas collecting pipe 10. The diversion tube 21 causes the second detent 244 to disengage from the slot of the diversion tube 21 under the action of the pulling force. After that, the diversion tube 21 is pulled out from the inside of the gas collecting pipe 10 together with the intubation tube 241;

[0055] When the sealing plug 252 moves, it drives the outer tube 251 to move. The outer tube 251 drives the second retaining piece 33 to approach the first retaining piece 32. After the second retaining piece 33 contacts and seals with the first retaining piece 32, several second retaining pieces 33 and the first retaining piece 32 divide the internal space of the gas collecting pipe 10 into multiple independent spaces. Each space is filled with the breathing sample, so that the breathing sample inside the gas collecting pipe 10 is divided into multiple portions for separate use.

[0056] As mentioned above, only the preferred specific embodiments of the present invention are described, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A respiratory function breathing sampling device for respiratory medicine, comprising an air collecting pipe (10), one end of the air collecting pipe (10) is fixedly connected to a connecting nozzle (11), the other end of the air collecting pipe (10) is provided with an air outlet head (13), the interior of the connecting nozzle (11) is clamped with a breathing interface (12), characterized in that: Also includes: A saliva separation mechanism (20), the saliva separation mechanism (20) comprising a guide tube (21) arranged inside the air collecting tube (10), the guide tube (21) being provided with a variable diameter flow channel and a return flow channel communicating with each other, a water-absorbing cloth (22) being provided at the connection between the variable diameter flow channel and the return flow channel, the breathing interface (12) being provided with a first sealing unit (23), the air collecting tube (10) being provided with a second sealing unit (25), a connecting assembly (24) being provided between the breathing interface (12) and the guide tube (21), and the air inlet of the air collecting tube (10) being provided with a sealing membrane; The first sealing unit (23) comprises a plastic tube (231) fixed inside the breathing interface (12), a one-way membrane flap (232) being fixed to the inner wall of the plastic tube (231), the second sealing unit (25) comprises an outer tube (251) slidably connected to the inside of the gas collecting pipe (10), a sealing plug (252) being fixed to one end of the outer tube (251), and plastic sheets (233) being fixed to the top and bottom of the breathing interface (12); The plastic tube (231) and the plastic sheet (233) are both elastic. After the patient holds the breathing interface (12) in his mouth, the plastic sheet (233) squeezes the plastic tube (231) through the bite force. The plastic tube (231) opens the one-way membrane flap (232) through deformation, thereby weakening the obstruction of the one-way membrane flap (232) to the airflow and reducing the resistance that the patient needs to overcome when exhaling. The exhaled airflow is accelerated through the variable diameter flow channel of the guide tube (21) and then returns, and the absorbent cloth (22) absorbs the saliva separated by inertia in the airflow.

2. A respiratory function breathing sampling device according to claim 1, characterized in that: The connecting assembly (24) includes a cannula (241) fixed to one end of the breathing interface (12), a circular ring (243) fixed to one side of the sealing plug (252), and a first latch (242) and a second latch (244) respectively fixed to the inner walls of the cannula (241) and the circular ring (243) for engaging with the guide tube (21).

3. A respiratory function breathing sampling device according to claim 2, characterized in that: Both sides of the first latch (242) are inclined, and when the guide tube (21) is rotated, the first latch (242) embedded in the outer wall of the guide tube (21) is disengaged from the guide tube (21).

4. A respiratory function breathing sampling device according to claim 1, characterized in that: The gas collecting pipe (10) further comprises a separating mechanism (30), wherein the interior of the gas collecting pipe (10) is rotatably connected to an inner pipe (31) inserted into the interior of the outer pipe (251), the inner wall of the gas collecting pipe (10) is fixedly connected to at least one baffle 1 (32), and the exterior of the outer pipe (251) is fixed with the same number of baffle 2 (33) as the number of baffle 1 (32).

5. A respiratory function breathing sampling device according to claim 4, characterized in that: The air outlet head (13) is slidably connected to the interior of the inner tube (31), and a spring (34) is provided between the air outlet head (13) and the inner tube (31).

6. A respiratory function breathing sampling device according to claim 4, characterized in that: The middle of the air outlet head (13) is provided with an air outlet hole connected to the interior of the inner tube (31), and a rubber membrane (35) is fixed inside the air outlet hole. The first baffle (32) and the second baffle (33) divide the interior of the gas collecting pipe (10) into multiple independent spaces. The outer tube (251) is provided with an air vent hole connected to each space.

7. A respiratory function breathing sampling device according to claim 6, characterized in that: The inner tube (31) is provided with a strip-shaped hole, and the inner tube (31) can be individually connected to each vent hole on the outer tube (251) in sequence through deflection.

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