An anti-regurgitation three-way mouthpiece bag

Abstract

The present application relates to the technical field of anti-reflux gas collection bag, and discloses an anti-reflux three-way mouthpiece gas collection bag, which comprises a three-way mouthpiece, the three-way mouthpiece is provided with an air inlet for exhalation, a gas collection bag connecting port for connecting a gas collection bag and a waste gas bag connecting port for connecting a waste gas bag; the gas collection bag is provided with a first opening, an anti-reflux device is arranged on the inner wall of the first opening and close to the direction of the gas collection bag, the anti-reflux device comprises a first soft belt, a second soft belt, a circular anti-reflux film and a circular gas inlet, the gas inlet is arranged at the center of the anti-reflux device, and the radius of the gas inlet is smaller than that of the anti-reflux film, the first soft belt and the second soft belt are both semicircular arcs, and the first soft belt and the second soft belt are arranged on the anti-reflux device in a central symmetry mode; the present application has the advantages that the gas in the alveoli can be collected, the accuracy of the detection result is ensured, the anti-reflux effect is good, and the gas collection bag can emit a sound prompt when it is full.

Description

Technical Field

[0001] This invention relates to the field of anti-backflow gas collection bag technology, specifically an anti-backflow three-way bite-mouth gas collection bag. Background Technology

[0002] The main function of medical methane and hydrogen breath collection bags is to collect exhaled gas and measure its methane and hydrogen content. The detection unit for methane and hydrogen is ppm (parts per million), where 1 ppm = 10^-6, a unit used in trace analysis to express the relative detection limit. This detection method helps doctors assess a patient's gut microbiota levels, gastrointestinal function, oral-to-blind transit time, gastrointestinal motility, carbohydrate malabsorption and intolerance, and pancreatic exocrine dysfunction and insufficiency, thus assisting in diagnosis and treatment. Currently, doctors have patients exhale directly into the collection bag, which is then sealed and sent to a laboratory for testing. By measuring the methane and hydrogen content in the gas, the patient's gastrointestinal condition can be understood, thus assisting doctors in diagnosis and treatment.

[0003] For example, Chinese Patent Application No. CN202222912507.7 discloses an anti-backflow gas collection bag for exhalation testing, belonging to the technical field of anti-backflow gas collection bags. It includes a gas collection bag body with a circular hole on its upper side. A leak-proof gas collection bag is fixedly connected to the inner wall of the gas collection bag body inside the circular hole. The upper end of the leak-proof gas collection bag is located outside the gas collection bag body, and the lower end of the leak-proof gas collection bag is located inside the gas collection bag body. The gas collection bag body contains a gas collection bag with a circular hole on its upper side. The leak-proof gas collection bag has an air inlet on one side. Using this design principle, an air valve is employed. When blowing air, gently pinching the air inlet end of the leak-proof gas collection bag opens the channel for gas collection. When blowing is finished, the gas pushes the lower side of the leak-proof gas collection bag, thus blocking the air inlet and preventing gas leakage, significantly improving the accuracy of the test results. However, this method cannot guarantee that the collected gas is from the alveoli, affecting the accuracy of the test results. The anti-backflow effect is also insufficient, and the fullness of the gas collection bag can only be observed visually. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a three-way mouthpiece gas collection bag with anti-backflow properties. It has the advantages of ensuring the collection of gas from the alveoli, guaranteeing the accuracy of test results, having a good anti-backflow effect, and emitting an audible alert when the gas collection bag is full. This solves the problems of impure collected gas affecting the accuracy of test results, poor anti-backflow effect, and the inability to indicate whether the gas collection bag is full.

[0005] (II) Technical Solution To achieve the aforementioned goals of ensuring the collection of gas from the alveoli, guaranteeing the accuracy of test results, providing good anti-reflux effect, and issuing an audible alert when the gas collection bag is full, this invention provides the following technical solution: an anti-reflux three-way mouthpiece gas collection bag, comprising a three-way mouthpiece, wherein the three-way mouthpiece is provided with an air inlet for exhalation, a gas collection bag connection port for connecting to the gas collection bag, and a waste gas bag connection port for connecting to the waste gas bag; a connector is fixedly provided on the inner wall of the gas collection bag connection port; and a connecting tube is provided along the direction of the gas collection bag connection port of the connector. A gas collecting bag has a first opening, which is detachably connected to a connecting pipe. An anti-backflow device is provided on the inner wall of the first opening near the gas collecting bag to prevent gas entering the bag from flowing back out. The anti-backflow device includes a first flexible band, a second flexible band, a circular anti-backflow membrane, and a circular gas collecting port. The gas collecting port is located at the center of the anti-backflow device, and its radius is smaller than the radius of the anti-backflow membrane. The first and second flexible bands are both semi-circular arcs and are centrally symmetrically arranged on the anti-backflow device. One end of the first flexible band is fixedly connected to the anti-backflow membrane, and the other end is fixedly connected to the inner wall of the first opening. Similarly, one end of the second flexible band is fixedly connected to the anti-backflow membrane, and the other end is fixedly connected to the inner wall of the first opening. The waste gas bag has a second opening, which is fitted onto the connection port of the waste gas bag.

[0006] Preferably, the connecting pipe has a channel in the middle, and the radius of the channel is smaller than the radius of the anti-backflow membrane.

[0007] Preferably, the anti-backflow membrane, the first soft strip, and the second soft strip are all attached to the anti-backflow device. When gas enters, the gas will push the anti-backflow membrane, the first soft strip, and the second soft strip into the gas collecting bag. The gas enters the gas collecting bag along the gas collecting port. When the gas collecting bag is full, the gas inside the gas collecting bag will press the anti-backflow membrane, the first soft strip, and the second soft strip tightly against the anti-backflow device to prevent gas backflow.

[0008] Preferably, an annular groove is formed on the outer wall of the connecting pipe, and a sealing ring for sealing is provided in the annular groove.

[0009] Preferably, a ring of protrusions is provided on the inner wall of the first opening, the protrusions being used to engage the first opening with the connecting pipe.

[0010] Preferably, the connector is molded and fixed to the inner wall of the gas collection bag connection port.

[0011] Preferably, the pipe where the air inlet is located is connected to the pipe where the exhaust bag connection port is located in an "L" shape, the exhaust bag connection port is located on the pipe wall of the pipe where the exhaust bag connection port is located, and the exhaust bag connection port faces the opposite direction to the air inlet.

[0012] Preferably, the connector has a small hole for indicating that the gas collection bag is full of gas.

[0013] Preferably, the second opening is fitted onto the exhaust bag connection port, and the second opening and the exhaust bag connection port are sealed and fixedly connected by a fixing strap.

[0014] Preferably, a fixing thin block for sealing connection with the gas collecting bag is provided on the outer wall of the tail end of the first opening. The fixing thin block and the gas collecting bag are sealed and fixed by strong adhesive. A positioning protrusion is also provided on the outer wall of the first opening to ensure that the bag cover is tightly closed after the gas collecting bag is full of gas.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a three-way mouthpiece gas collection bag for preventing backflow, which has the following beneficial effects: 1. The anti-backflow three-way bite-mouth gas collecting bag has an anti-backflow device on the inner wall of the first opening near the gas collecting bag to prevent gas entering the gas collecting bag from flowing back out of the gas collecting bag. The anti-backflow device includes a first flexible band, a second flexible band, a circular anti-backflow membrane, and a circular gas collecting port. The gas collecting port is located at the center of the anti-backflow device, and the radius of the gas collecting port is smaller than the radius of the anti-backflow membrane. The first and second flexible bands are both semi-circular arcs and are centrally symmetrically arranged on the anti-backflow device. One end of the first flexible band is fixedly connected to the anti-backflow membrane, and the other end is fixedly connected to the inner wall of the first opening. One end of the second flexible band is fixedly connected to the anti-backflow membrane, and the other end is fixedly connected to the inner wall of the first opening. When the gas collecting bag is full, the gas inside the gas collecting bag will tightly press the anti-backflow membrane, the first flexible band, and the second flexible band against the anti-backflow device to prevent gas backflow.

[0016] 2. This anti-backflow three-way bite nozzle gas collection bag features an air inlet, a gas collection bag connection port, and an exhaust gas bag connection port on the three-way bite nozzle. The gas collection bag is detachably connected to the connecting pipe inside the gas collection bag connection port, while the exhaust gas bag is fixedly connected to the exhaust gas connection port. The exhaled gas first enters the exhaust gas bag along the three-way bite nozzle. As gas enters the exhaust gas bag, the air pressure increases. Once the air pressure reaches a certain level, subsequent exhaled gas will enter the gas collection bag along the connecting pipe. This ensures that the gas collected in the gas collection bag is all exhaled from the alveoli, thereby guaranteeing the accuracy of the methane and hydrogen content detection results.

[0017] 3. This anti-backflow three-way mouthpiece gas collection bag has a small hole on the connector to indicate that the gas collection bag is full. When the gas collection bag is full, when you continue to blow air, the gas will flow out from the small hole on the connector and then the small hole will make a sound. You can know that the gas collection bag is full of alveolar gas without visual inspection, so that you can stop blowing air in time and ensure the efficiency of collecting gas in the alveoli. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front structural diagram of the three-way bite nozzle of the present invention; Figure 3 This is a side view of the three-way bite nozzle of the present invention; Figure 4 This is a cross-sectional view of the three-way bite nozzle of the present invention; Figure 5 This is a schematic diagram of the connector of the present invention; Figure 6 This is a partial structural cross-sectional view of the present invention after the connecting pipe is connected to the one-way valve; Figure 7 This is a schematic diagram of the anti-backflow membrane of the present invention.

[0019] In the diagram: 1. Three-way nozzle; 11. Air inlet; 12. Exhaust bag connection port; 13. Gas collection bag connection port; 2. Gas collection bag; 21. First opening; 211. Protrusion; 22. Positioning protrusion; 23. Fixing block; 3. Exhaust bag; 31. Second opening; 4. Fixing strap; 5. Connector; 51. Connecting pipe; 52. Small hole; 53. Annular groove; 54. Sealing ring; 6. Anti-backflow device; 61. First flexible band; 62. Second flexible band; 63. Anti-backflow membrane; 64. Gas collection port. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1-7 As shown, a backflow-preventing three-way mouthpiece gas collection bag includes a three-way mouthpiece 1, which is provided with an air inlet 11 for exhalation, a gas collection bag connection port 13 for connecting to a gas collection bag 2, and a waste gas bag connection port 12 for connecting to a waste gas bag 3; a connector 5 is fixedly provided on the inner wall of the gas collection bag connection port 13; a connecting pipe 51 is provided on the connector 5 along the direction of the gas collection bag connection port 13; A gas collecting bag 2 has a first opening 21, which is detachably connected to a connecting pipe 51. An anti-backflow device 6 is provided on the inner wall of the first opening 21 near the gas collecting bag 2 to prevent gas entering the gas collecting bag 2 from flowing back out. The anti-backflow device 6 includes a first flexible band 61, a second flexible band 62, a circular anti-backflow membrane 63, and a circular gas collecting port 64. The gas collecting port 64 is located at the center of the anti-backflow device 6, and its radius is smaller than that of the anti-backflow membrane 63. Both the first flexible band 61 and the second flexible band 62 are semi-circular arcs and are centrally symmetrically arranged on the anti-backflow device 6. One end of the first flexible band 61 is fixedly connected to the anti-backflow membrane 63, and the other end is fixedly connected to the inner wall of the first opening 21. One end of the second flexible band 62 is fixedly connected to the anti-backflow membrane 63, and the other end is fixedly connected to the inner wall of the first opening 21. The exhaust bag 3 has a second opening 31, which is fitted onto the exhaust bag connection port 12.

[0022] The exhaled gas first enters the waste gas bag through the three-way nozzle. As gas enters the waste gas bag, the air pressure increases. Once the air pressure reaches a certain level, the subsequent exhaled gas will enter the gas collection bag through the connecting tube. This ensures that the gas collected in the gas collection bag is all exhaled from the alveoli, thus guaranteeing the accuracy of the methane and hydrogen content detection results.

[0023] In this embodiment, a channel is provided in the middle of the connecting pipe 51, and the radius of the channel is smaller than the radius of the anti-backflow membrane 63. This allows the blown gas to enter the waste gas bag relatively and makes it more difficult for it to enter the gas collection bag, thereby ensuring that the blown waste gas enters the waste gas bag first, and thus ensuring that the gas collected in the gas collection bag is the gas in the alveoli. The inner coating of the gas collection bag has multiple layers of film, which will not react with the collected gas sample, thereby ensuring the stability of the gas sample and achieving the effect of preservation for up to 15 days.

[0024] In this embodiment, the anti-backflow membrane 63, the first soft strip 61, and the second soft strip 62 are all attached to the anti-backflow device 6. When gas enters, the gas will push the anti-backflow membrane 63, the first soft strip 61, and the second soft strip 62 into the gas collecting bag 2. The gas enters the gas collecting bag 2 along the gas collecting port 64. When the gas collecting bag 2 is full, the gas inside the gas collecting bag 2 will press the anti-backflow membrane 63, the first soft strip 61, and the second soft strip 62 tightly against the anti-backflow device 6 to prevent gas backflow.

[0025] In this embodiment, an annular groove 53 is provided on the outer wall of the connecting pipe 51, and a sealing ring 54 for sealing is provided in the annular groove 53; to ensure that the connecting pipe and the first opening can be tightly connected to prevent air leakage.

[0026] In this embodiment, a ring of protrusions 211 is provided on the inner wall of the first opening 21. The protrusions 211 are used to snap the first opening 21 onto the connecting pipe 51, ensuring that the connecting pipe and the first opening can be tightly connected, thereby ensuring good airtightness after the connecting pipe and the first opening are connected.

[0027] In this embodiment, the connector 5 is molded and fixed to the inner wall of the gas collection bag connection port 13; this ensures that the gas collection bag connector and the gas collection bag connection port are firmly connected together, and also allows for mass production, thus improving efficiency.

[0028] In this embodiment, the pipe where the air inlet 11 is located is connected to the pipe where the exhaust bag connection port 12 is located in an "L" shape. The gas collection bag connection port 13 is located on the pipe wall of the pipe where the exhaust bag connection port 12 is located, and the gas collection bag connection port 13 is opposite to the air inlet 11. This ensures that the blown gas preferentially flows to the exhaust bag, thereby ensuring that the gas collected in the gas collection bag is the gas in the alveoli.

[0029] In this embodiment, the connector 5 is provided with a small hole 52 for indicating that the gas collection bag is full of gas; after the gas collection bag is full of gas, when blowing air continues, the small hole on the connector will make an audible prompt so that blowing air can be stopped in time and the gas collection bag can be removed, thereby improving the efficiency of collecting alveolar gas.

[0030] In this embodiment, the second opening 31 is fitted onto the exhaust bag connection port 12, and the second opening 31 and the exhaust bag connection port 12 are sealed and fixedly connected by the fixing strap 4; this ensures good airtightness between the second opening and the exhaust bag connection port, thereby avoiding air leakage when blowing air and affecting the efficiency of gas collection in the alveoli.

[0031] In this embodiment, a fixing thin block 23 for sealing connection with the gas collection bag 2 is provided on the outer wall of the tail end of the first opening 21. The fixing thin block 23 and the gas collection bag 2 are sealed and fixed with strong adhesive. The outer wall of the first opening 21 is also provided with a positioning protrusion 22 to ensure that the bag cover is tightly closed after the gas collection bag 2 is filled with gas. The sealing and fixing between the fixing thin block and the gas collection bag with strong adhesive can ensure good air tightness between the first opening and the gas collection bag, thereby avoiding air leakage when blowing air and affecting the efficiency of gas collection in the alveoli. After the gas collection bag is filled with gas, the bag cover is used to cover the first opening up to the positioning protrusion to ensure that the bag cover and the gas collection bag are tightly closed.

[0032] Working principle: This application is used to collect gas in the alveoli. The user first puts on the gas collection bag 2 and snaps it onto the connecting tube 51, and then blows air into the air inlet 11. Due to the anti-backflow device 6 on the gas collection bag 2, when the air pressure in the exhaust bag 3 is low, the blown air first enters the exhaust bag 3 along the three-way bite 1. As the gas enters the exhaust bag 3, the air pressure increases. After the air pressure increases to a certain level, the subsequent blown air will enter the gas collection bag 2 along the connecting tube 51. When the gas collection bag 2 is full, when blowing air again, the small hole 52 on the connecting piece 5 will make a sound prompt. At the same time, the gas in the gas collection bag 2 will tightly press the anti-backflow membrane 63, the first soft band 61 and the second soft band 62 against the anti-backflow device 6 to prevent gas backflow. At this time, the gas collection bag 2 is removed and the bag cap is used to cover the first opening 21 to the positioning protrusion 22. Finally, the gas collection bag 2 is sent to test the content of methane and hydrogen.

[0033] In summary, this anti-backflow three-way mouthpiece gas collecting bag has an anti-backflow device 6 installed on the inner wall of the first opening 21 near the gas collecting bag 2 to prevent gas entering the gas collecting bag 2 from flowing back out of the gas collecting bag 2. The anti-backflow device 6 includes a first flexible band 61, a second flexible band 62, a circular anti-backflow membrane 63, and a circular gas collecting port 64. The gas collecting port 64 is located at the exact center of the anti-backflow device 6, and the radius of the gas collecting port 64 is smaller than the radius of the anti-backflow membrane 63. Both the first flexible band 61 and the second flexible band 62 are semi-circular. The first flexible band 61 and the second flexible band 62 are arranged in an arc shape and are centrally symmetrical on the anti-backflow device 6. One end of the first flexible band 61 is fixedly connected to the anti-backflow membrane 63, and the other end is fixedly connected to the inner wall of the first opening 21. One end of the second flexible band 62 is fixedly connected to the anti-backflow membrane 63, and the other end is fixedly connected to the inner wall of the first opening 21. When the gas collecting bag 2 is full, the gas in the gas collecting bag 2 will press the anti-backflow membrane 63, the first flexible band 61 and the second flexible band 62 tightly against the anti-backflow device 6 to prevent gas backflow.

[0034] This anti-backflow three-way mouthpiece gas collection bag has an air inlet 11, a gas collection bag connection port 13, and an exhaust gas bag connection port 12 on the three-way mouthpiece 1. The gas collection bag 2 is detachably connected to the connecting pipe 51 inside the gas collection bag connection port 13, and the exhaust gas bag 3 is fixedly connected to the exhaust gas connection port 12. The exhaled gas first enters the exhaust gas bag 3 along the three-way mouthpiece 1. As the gas enters the exhaust gas bag 3, the air pressure increases. After the air pressure increases to a certain level, the subsequent exhaled gas will enter the gas collection bag 2 along the connecting pipe. This ensures that the gas collected in the gas collection bag 2 is all exhaled from the alveoli, thereby ensuring the accuracy of the detection results of methane and hydrogen content in the gas.

[0035] The anti-backflow three-way mouthpiece gas collection bag has a small hole 52 on the connector 5 to indicate that the gas collection bag 2 is full of gas. When the gas collection bag 2 is full, the small hole 52 on the connector 5 will make an audible prompt when blowing air, so that blowing air can be stopped in time to ensure the efficiency of collecting gas in the alveoli.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A backflow-preventing three-way mouthpiece gas collection bag, comprising a three-way mouthpiece (1), characterized in that: The three-way mouthpiece (1) is provided with an air inlet (11) for exhalation, an air collection bag connection port (13) for connecting to the air collection bag (2), and an exhaust bag connection port (12) for connecting to the exhaust bag (3); a connector (5) is fixedly provided on the inner wall of the air collection bag connection port (13); the connector (5) is provided with a connecting tube (51) along the direction of the air collection bag connection port (13); A gas collecting bag (2) is provided with a first opening (21), which is detachably connected to the connecting pipe (51). An anti-backflow device (6) is provided on the inner wall of the first opening (21) near the gas collecting bag (2) to prevent gas entering the gas collecting bag (2) from flowing back out of the gas collecting bag (2). The anti-backflow device (6) includes a first soft band (61), a second soft band (62), a circular anti-backflow membrane (63), and a circular gas collecting port (64). The gas collecting port (64) is opened on the anti-backflow device. The first soft strip (61) and the second soft strip (62) are both semi-circular arcs and are centrally symmetrically arranged on the anti-backflow device (6). One end of the first soft strip (61) is fixedly connected to the anti-backflow membrane (63), and the other end is fixedly connected to the inner wall of the first opening (21). One end of the second soft strip (62) is fixedly connected to the anti-backflow membrane (63), and the other end is fixedly connected to the inner wall of the first opening (21). The exhaust bag (3) is provided with a second opening (31), which is fitted onto the exhaust bag connection port (12). The anti-backflow membrane (63), the first soft strip (61) and the second soft strip (62) are all attached to the anti-backflow device (6). When gas enters, the gas will push the anti-backflow membrane (63), the first soft strip (61) and the second soft strip (62) into the gas collection bag (2). The gas enters the gas collection bag (2) along the gas collection port (64). When the gas collection bag (2) is full, the gas inside the gas collection bag (2) will press the anti-backflow membrane (63), the first soft strip (61) and the second soft strip (62) tightly against the anti-backflow device (6) to prevent gas backflow. The pipe where the air inlet (11) is located is connected to the pipe where the exhaust bag connection port (12) is located in an "L" shape. The gas collection bag connection port (13) is located on the pipe wall of the pipe where the exhaust bag connection port (12) is located. The gas collection bag connection port (13) is opposite to the air inlet (11). The blown gas first enters the exhaust bag through the three-way bite nozzle. As the gas enters the exhaust bag, the air pressure increases. Once the air pressure reaches a certain level, the subsequent blown gas will enter the gas collection bag through the connecting pipe.

2. The anti-backflow three-way mouthpiece gas collection bag according to claim 1, characterized in that: The connecting pipe (51) has a channel in the middle, and the radius of the channel is smaller than the radius of the anti-backflow membrane (63).

3. The anti-backflow three-way mouthpiece gas collection bag according to claim 1, characterized in that: The outer wall of the connecting pipe (51) is provided with an annular groove (53), and a sealing ring (54) for sealing is provided in the annular groove (53).

4. The anti-backflow three-way mouthpiece gas collection bag according to claim 1, characterized in that: A ring of protrusions (211) is provided on the inner wall of the first opening (21), and the protrusions (211) are used to snap the first opening (21) onto the connecting pipe (51).

5. A three-way mouthpiece gas collection bag for preventing backflow according to claim 1, characterized in that: The connector (5) is molded and fixed to the inner wall of the gas collection bag connection port (13).

6. A three-way mouthpiece gas collection bag for preventing backflow according to claim 5, characterized in that: The connector (5) has a small hole (52) for indicating that the gas collection bag (2) is full of gas.

7. The anti-backflow three-way mouthpiece gas collection bag according to claim 1, characterized in that: The second opening (31) is fitted onto the exhaust bag connection port (12), and the second opening (31) and the exhaust bag connection port (12) are sealed and fixedly connected by a fixing strap (4).

8. A backflow-preventing three-way mouthpiece gas collection bag according to claim 1 or 4, characterized in that: The outer wall of the first opening (21) is provided with a fixing thin block (23) for sealing connection with the gas collecting bag (2). The fixing thin block (23) and the gas collecting bag (2) are sealed and fixed by strong adhesive. The outer wall of the first opening (21) is also provided with a positioning protrusion (22) for ensuring that the bag cover is tightly closed after the gas collecting bag (2) is filled with gas.

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