Gastroscope anti-reflux device

Abstract

A gastroscope anti-reflux device comprises a gastroscope outer sleeve and a cardia air bag assembly, and an inner ring groove and an outer ring groove are formed in the gastroscope outer sleeve; the cardia air bag assembly comprises an inner clamping ring air bag, an outer clamping ring air bag and a cardia ring air bag, the inner clamping ring air bag and the outer clamping ring air bag are fixedly installed in the inner ring groove and the outer ring groove, an inner clamping ring groove and the outer clamping ring groove in the cardia ring air bag are bonded to the inner clamping ring air bag and the outer clamping ring air bag respectively, and an inflation tube is arranged in the tube wall of the gastroscope outer sleeve. The inflation tube is communicated with the inner and outer snap ring air bags, the inner and outer snap ring air bags are respectively communicated with the cardia ring air bag, and a one-way valve is arranged in the cardia ring air bag; the cardia ring air bag has the beneficial effects that the cardia ring air bag can prevent regurgitation of gastric contents; meanwhile, the front end of the gastroscope outer sleeve is completely wrapped by the cardia ring air bag and cannot be stained with any gastric contents, and when the gastroscope outer sleeve is pulled out, the situation that the gastric contents are taken out is avoided, and the situation that the gastric contents enter the trachea by mistake is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an anti-reflux device for gastroscopes. Background Art

[0002] The incidence of upper gastrointestinal bleeding is very high, and there are many clinical patients. It is a common emergency in the digestive department. Gastroscopy is an important means for clear diagnosis and treatment. During gastroscopy, a great risk is the reflux of gastric contents in the stomach. The gastric contents include: 1. A small amount or a large amount of food or a mixture of food and gastric juice retained in the stomach, 2. A large amount of water drunk during the gastroenteroscopy package, and part of it remains in the stomach, 3. A mixture of blood and gastric juice in acute bleeding, etc. Since gastroscopy can induce the vomiting action of the examinee, it is usually required that the stomach of the examinee is empty before gastroscopy. Otherwise, the gastric contents can flow back into the oral cavity through the gap between the esophagus and the gastroscope. The oral cavity is the common opening of the esophagus and the airway, and the refluxed gastric contents may be accidentally aspirated into the airway, which may cause aspiration pneumonia or asphyxia, and will endanger life seriously in severe cases.

[0003] For emergency patients, they are usually in a full-stomach state during rescue. When performing gastroscopy on such patients, reflux and aspiration are likely to occur. Especially in patients with gastrointestinal bleeding, due to blood loss, there may be changes in consciousness, and the protective reflex functions such as coughing and swallowing in the throat are abnormal, and the possibility of reflux and aspiration is even greater. At present, the clinical practices to reduce the risk of reflux and aspiration during gastroscopy for full-stomach patients include inserting a gastric tube for drainage in advance, using drugs to reduce gastric secretions, delaying the examination time, etc. However, the above methods have an insignificant effect when gastric contents persist. As long as there are gastric contents, reflux cannot be completely avoided, so the risk of reflux and aspiration during gastroscopy for full-stomach patients cannot be completely eliminated. The risk of gastroscopy for full-stomach patients restricts the application scope of gastroscopy to a certain extent.

[0004] To this end, Patent No. 2021116686340 discloses an anti-reflux device for a gastroscope, which is arranged at the front part of the handle end of the endoscope tube and is connected to the working channel of the endoscope tube. The anti-reflux device for the gastroscope has an up-and-down bidirectional channel, and there are staggered reflux grooves between the up-and-down bidirectional channels. The reflux grooves are in a U-shaped structure, which communicate the up-and-down channels with each other. The opening direction of the reflux grooves faces the lens direction of the gastroscope. It has two staggered reflux channels, which do not generate resistance to the forward liquid flow, and for the impact of the reverse-flowing liquid, it will continuously generate a diversion and backflow effect, blocking the flow of the fluid in the up-and-down channels under pressure, achieving a stable and reliable anti-reflux effect. However, this solution cannot completely achieve the anti-reflux effect. Especially after the gastroscopy is completed and the device is withdrawn, the device itself will stick to and carry out gastric contents, and may accidentally enter the trachea. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a device for preventing the reflux of gastric contents and preventing the contents from being carried out at the end of the operation, so as to prevent the gastric contents from accidentally entering the trachea.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is a gastroscope anti-reflux device, including a gastroscope outer sleeve and a cardiac airbag assembly, wherein the front part of the gastroscope outer sleeve (the front part is located at the cardiac exit position in the stomach when in use) is provided with an inner ring groove on the inner ring wall, and the outer ring groove is provided on the outer ring wall; the cardiac airbag assembly includes an inner snap ring airbag, an outer snap ring airbag and a cardiac ring airbag, and the inner snap ring airbag and the outer snap ring airbag are both in the shape of a tire, and the airbag wall on the side with a smaller diameter is called the inner ring wall, and the airbag wall on the side with a larger diameter is called the inner ring wall. The bladder wall is called the outer ring wall, the inner ring wall of the outer snap ring airbag is fixedly mounted on the groove bottom ring of the outer ring groove, the outer ring wall of the inner snap ring airbag is fixedly mounted on the groove bottom ring of the inner ring groove, the cardia ring airbag is an annular tubular airbag, the inner upper part of the cross section of the annular tubular airbag is concave, and the outer lower part is convex, that is, the cardia ring airbag is composed of an inner concave ring wall and an outer convex ring wall, the inner concave ring wall includes an outer ring concave wall, an end ring side wall and an inner ring concave wall, the outer ring concave wall is provided with an outer snap ring groove, and the outer snap ring groove is bonded On the outer ring wall of the outer ring clamping airbag, an inner clamping ring groove is provided on the inner ring concave wall, the inner clamping ring groove is bonded to the inner ring wall of the inner clamping ring airbag, and the end ring side wall is bonded to the front end surface of the gastroscope outer sleeve; an inflation tube is provided in the tube wall of the gastroscope outer sleeve, and an inner bronchus and an outer bronchus are provided on the inflation tube, the inner bronchus passes through the bottom of the inner ring groove to connect to the inner clamping ring airbag, and the outer bronchus passes through the bottom of the outer ring groove to connect to the outer clamping ring airbag; a first passage is provided on the inner ring wall of the inner clamping ring airbag Air hole, a first air inlet hole is provided on the inner retaining ring groove, the first air vent is directly connected with the first air inlet hole, a one-way valve is provided on the inner side of the first air inlet hole to prevent the gas in the cardia ring airbag from being discharged, so that the gas in the cardia ring airbag can only enter but not exit; a second air vent is provided on the outer ring wall of the outer retaining ring airbag, the second air inlet hole is provided on the outer retaining ring groove, the second air vent is directly connected with the second air inlet hole, and a one-way valve is provided on the inner side of the second air inlet hole, so that the gas in the cardia ring airbag can only enter but not exit.

[0007] The bonding is a wet-release bonding, that is, the bonding is released after it is wetted in the stomach after use, that is, the outer clamping ring groove is bonded to the outer ring wall of the outer ring clamping airbag before use, and is released after use. The bonding in this article is all wet-release bonding.

[0008] The cardia ring airbag is an edible timed disintegrating retractable inflatable airbag made of edible hollow capsule shell material. It can be inflated and elastically expanded, and the disintegration time can be set to 2-10 hours, and the disintegration time length is set according to the patient's anesthesia awakening time.

[0009] Before use, the inner retaining ring airbag, outer retaining ring airbag, and cardia ring airbag are not inflated. The inner retaining ring airbag is recessed in the inner ring groove, the outer retaining ring airbag is recessed in the outer ring groove, the outer retaining ring groove on the outer concave wall of the cardia ring airbag is bonded to the outer retaining ring airbag and recessed in the outer ring groove, the inner retaining ring groove on the inner concave wall of the cardia ring airbag is bonded to the inner retaining ring airbag and recessed in the inner ring groove, and the side wall of the end ring is bonded to the front end face of the gastroscope outer sleeve.

[0010] During use, the gastroscope outer sleeve is sleeved on the gastroscope tube and inserted along the gastroscope tube until the front end passes through the cardia and reaches the inside of the gastric balloon. Then, it is inflated through the inflation tube, causing the inner retaining ring airbag, outer retaining ring airbag, and cardia ring airbag to bulge and protrude outside the outer ring wall of the gastroscope outer sleeve respectively. At the same time, the cardia ring airbag bulges, and the outer retaining ring groove on it is stuck on the outer retaining ring airbag, and the inner retaining ring groove is stuck on the inner retaining ring airbag. At the same time, the outer convex outer wall of the outer convex ring wall on the cardia ring airbag is stuck on the cardia, and the outer convex inner wall of the outer convex ring wall is stuck on the gastroscope tube, thus preventing gastric contents from refluxing. At this time, the front end of the gastroscope outer sleeve is completely wrapped by the cardia ring airbag, and the front end of the gastroscope outer sleeve will not be contaminated with any gastric contents.

[0011] On the outer ring wall of the front part of the gastroscope outer sleeve, the outer diameter of the outer ring wall on the side of the outer ring groove close to the front end face is smaller than the outer diameter of the outer ring wall on the side of the outer ring groove far from the front end face and larger than the bottom ring diameter of the outer ring groove. In this way, the tube body of the cardia ring airbag before inflation is closely attached to the front end of the gastroscope outer sleeve, and its outer diameter after being closely attached is smaller than the main body outer diameter of the gastroscope outer sleeve, so that the irritation to the esophageal wall of the patient can be reduced during insertion.

[0012] Furthermore, an esophageal wall airbag assembly is also provided on the outer ring wall of the gastroscope outer sleeve. The esophageal wall airbag assembly includes a second outer ring groove, a second outer retaining ring airbag, and an esophageal wall ring airbag; the second outer retaining ring airbag is fixedly installed on the second outer ring groove, the esophageal wall ring airbag is bonded to the outer ring wall of the second outer retaining ring airbag, the inner ring wall of the esophageal wall ring airbag is set as an inner concave ring wall and is bonded to the outer ring wall of the second outer retaining ring airbag, a second outward bronchus is provided on the inflation tube, the second outward bronchus passes through the bottom of the second outer ring groove to communicate with the second outer retaining ring airbag, a third ventilation hole is provided on the outer ring wall of the second outer retaining ring airbag, a third air inlet hole is provided on the inner ring wall of the esophageal wall ring airbag, the third ventilation hole is directly connected to the third air inlet hole, and a one-way valve is provided inside the third air inlet hole, so that the gas in the esophageal wall ring airbag can only enter and cannot exit.

[0013] During use, after the gastroscope outer cannula is inserted and the cardia ring airbag bulges, air can be further inflated into the second outer clamping ring airbag, and then into the esophageal wall ring airbag. Both the second outer clamping ring airbag and the esophageal wall ring airbag will bulge. The second outer clamping ring airbag will bulge out beyond the outer ring wall of the gastroscope outer cannula. The concave ring wall on the inner ring wall of the esophageal wall ring airbag will be clamped to the outer ring wall of the second outer clamping ring airbag. At the same time, the outer ring wall of the esophageal wall ring airbag will press against the esophageal wall. A small amount of gastric contents that bypass the cardia ring airbag can no longer bypass the esophageal wall ring airbag, thus further preventing gastric content reflux.

[0014] Furthermore, a third outer ring groove is also provided on the outer ring wall of the gastroscope outer cannula. A third outer clamping ring airbag is fixedly installed on the third outer ring groove. A second esophageal wall ring airbag is adhered to the outer ring wall of the third outer clamping ring airbag. The inner ring wall of the second esophageal wall ring airbag is provided as a concave ring wall and is adhered to the outer ring wall of the third outer clamping ring airbag. The inflatable tube is provided with a third outward bronchus. The third outward bronchus passes through the bottom of the third outer ring groove and communicates with the third outer clamping ring airbag. A fourth ventilation hole is provided on the outer ring wall of the third outer clamping ring airbag, and a fourth air inlet hole is provided on the inner ring wall of the esophageal wall ring airbag. The fourth ventilation hole is directly connected to the fourth air inlet hole. A one-way valve is provided inside the fourth air inlet hole, so that the gas in the second esophageal wall ring airbag can only enter and cannot exit.

[0015] During use, after the gastroscope outer cannula is inserted and the cardia ring airbag and the first esophageal wall ring airbag bulge, air can be further inflated into the third outer clamping ring airbag, and then into the second esophageal wall ring airbag. Both the third outer clamping ring airbag and the second esophageal wall ring airbag will bulge. The third outer clamping ring airbag will bulge out beyond the outer ring wall of the gastroscope outer cannula. The concave ring wall on the inner ring wall of the second esophageal wall ring airbag will be clamped to the outer ring wall of the third outer clamping ring airbag. At the same time, the outer ring wall of the second esophageal wall ring airbag will press against the esophageal wall. A small amount of gastric contents that bypass the cardia ring airbag and the first esophageal wall ring airbag can no longer bypass the second esophageal wall ring airbag, thus further preventing gastric content reflux.

[0016] After the gastroscopy is completed and the patient wakes up from the anesthesia, gas can be released or pumped out through the inflation tube. At this time, due to the one-way valve blocking the outflow of gas, the cardia ring airbag, the esophageal wall ring airbag, and the second esophageal wall ring airbag will all remain inflated and press against the cardia or the esophageal wall. The gas in the inner snap ring airbag, the outer snap ring airbag, the second outer snap ring airbag, and the third outer snap ring airbag will all be pumped out, and the airbags will shrink and collapse, retracting into the inner annular grooves at their respective positions, and the adhesion will automatically detach. Since the front end of the gastroscope outer tube was completely wrapped by the cardia ring airbag before, the front end of the gastroscope outer tube did not get contaminated with any gastric contents. When the gastroscope outer tube is withdrawn, no gastric contents will adhere to the esophageal wall, and even less will gastric contents enter the trachea by mistake, thus effectively avoiding potential safety hazards. The remaining cardia ring airbag, esophageal wall ring airbag, and second esophageal wall ring airbag are made of edible hollow capsule shell materials, which will automatically disintegrate and be digested within a set time. Compared with the prior art, the present invention has the following beneficial effects: ⑴ The gastroscope outer tube and the cardia ring airbag are designed. When the cardia ring airbag is inserted into the cardia position and inflated, the outer convex outer wall of the outer convex ring wall of the cardia ring airbag abuts against and clamps on the cardia, which can prevent gastric contents from refluxing along the esophageal wall outside the gastroscope outer tube; the outer convex inner wall of the outer convex ring wall of the cardia ring airbag abuts against and clamps on the gastroscope tube, which can prevent gastric contents from refluxing along the gastroscope tube inside the gastroscope outer tube; at the same time, the front end of the gastroscope outer tube is completely wrapped by the cardia ring airbag, and the front end of the gastroscope outer tube will not get contaminated with any gastric contents; when the gastroscope outer tube is withdrawn, the situation of bringing out gastric contents will not occur, nor will the situation of gastric contents entering the trachea by mistake.

[0017] ⑵ The inner annular groove and the outer annular groove, as well as the inner snap ring airbag, the outer snap ring airbag, and the cardia ring airbag are designed. When the gastroscope outer tube is inserted, the inner snap ring airbag, the outer snap ring airbag, and the cardia ring airbag without inflated gas can be recessed into the inner annular groove or the outer annular groove, which is convenient for insertion; when the gastroscope outer tube is withdrawn, the deflated inner snap ring airbag and the outer snap ring airbag can be recessed into the inner annular groove or the outer annular groove, which is convenient for withdrawal. And there is a one-way valve in the cardia ring airbag. When the inner snap ring airbag and the outer snap ring airbag are deflated, the cardia ring airbag will not deflate and will still remain in the cardia position to continue preventing gastric contents from refluxing.

[0018] ⑶ The inner snap ring airbag and the outer snap ring airbag, as well as the outer snap ring groove and the inner snap ring groove on the cardia ring airbag are designed. During use, the outer snap ring groove and the inner snap ring groove can be adhered to the inner snap ring airbag and the outer snap ring airbag to fix the gastroscope outer tube, and the outside of the cardia ring airbag can abut against the cardia and the inside can abut against the gastroscope tube, so that gastric contents cannot leak out. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front structure of the gastroscope anti-reflux device of the present invention.

[0020] Figure 2 is Figure 1 Schematic longitudinal sectional view of the central axis of the anti-reflux device for gastroscope in

[0021] Figure 3 is Figure 2 Magnified structural schematic diagram within circle A in

[0022] Figure 4 is Figure 3 Exploded structural schematic diagram of each component in

[0023] Figure 5 Schematic diagram of the outer diameter comparison of each section at the front end of the outer gastroscope tube of the present invention, where a is the outer diameter of the outer ring wall on the side close to the front end face of the outer ring groove, b is the outer diameter of the outer ring wall on the side far from the front end face of the outer ring groove, and c is the bottom ring diameter of the outer ring groove.

[0024] Figure 6 Schematic central sectional view of the anti-reflux device for gastroscope of the present invention during use, where A is the schematic central sectional view before inserting into the esophagus and when inserting into the esophagus, B is the schematic structural view of 1 during use after inserting into the esophagus, and C is the schematic central sectional view when pulling out the anti-reflux device for gastroscope after the gastroscope is completed and the anesthetic wears off, where the outer gastroscope tube is pulled out, the cardia ring airbag cannot be pulled out at the cardia position, and the esophageal wall airbag and the second esophageal wall airbag are both stuck on the esophagus and cannot be pulled out.

[0025] In the figure: 1. Outer gastroscope tube, 2. Inner ring groove, 3. Outer ring groove, 4. Inner clamping ring airbag, 5. Outer clamping ring airbag, 6. Cardia ring airbag, 7. Inner concave ring wall, 8. Outer convex ring wall, 9. Outer ring concave wall, 10. End ring side wall, 11. Inner ring concave wall, 12. Outer clamping ring groove, 13. Inner clamping ring groove, 14. Inflation tube, 15. Inner bronchus, 16. Outer bronchus, 17. First ventilation hole, 18. First air inlet hole, 19. Second ventilation hole, 20. Second air inlet hole, 21. Check valve, 22. Outer convex outer wall of the outer convex ring wall, 23. Outer convex inner wall of the outer convex ring wall, a. Outer diameter of the outer ring wall on the side close to the front end face of the outer ring groove, b. Outer diameter of the outer ring wall on the side far from the front end face of the outer ring groove, c. Bottom ring diameter of the outer ring groove, 24. Second outer ring groove, 25. Second outer clamping ring airbag, 26. Esophageal wall airbag, 27. Second outer bronchus, 28. Second esophageal wall airbag. Detailed implementation mode

[0026] The present invention will be further described below in conjunction with embodiments. The following embodiments are intended to illustrate the present invention rather than further limit the present invention, and the protection scope of the present invention should not be limited thereby.

[0027] Such as Figure 1As shown, a gastroscope anti-reflux device is made, which includes a gastroscope outer tube 1, a cardia airbag assembly, and an esophageal wall airbag assembly.

[0028] As Figure 2 , 3 , as shown in Figure 4, the front part of the gastroscope outer tube 1 is located at the cardia outlet position in the stomach during use. An inner ring groove 2 is provided on the inner ring wall of the front part of the gastroscope outer tube 1, and an outer ring groove 3 is provided on the outer ring wall.

[0029] The cardia airbag assembly includes an inner snap ring airbag 4, an outer snap ring airbag 5, and a cardia ring airbag 6; both the inner snap ring airbag 4 and the outer snap ring airbag 5 are in the shape of a tire. The airbag wall on the side with a smaller diameter is called the inner ring wall, and the airbag wall on the side with a larger diameter is called the outer ring wall. The inner ring wall of the outer snap ring airbag 5 is fixedly installed on the bottom ring of the outer ring groove 3, and the outer ring wall of the inner snap ring airbag 4 is fixedly installed on the bottom ring of the inner ring groove 2.

[0030] The cardia ring airbag 6 is an annular tubular airbag. The airbag wall at the position near the upper inner side of the cross-section of the annular tubular airbag is concave, called the inner concave ring wall 7, and the airbag walls at the positions near the outer side, lower side, and inner side are convex, called the outer convex ring wall 8. That is, the cardia ring airbag 6 is composed of the inner concave ring wall 7 and the outer convex ring wall 8. The inner concave ring wall 7 includes an outer ring concave wall 9, an end ring side wall 10, and an inner ring concave wall 11. The end ring side wall 10 is used to abut against the annular end face of the gastroscope outer tube. An outer snap ring groove 12 is provided on the outer ring concave wall 9, and the outer snap ring groove 12 is bonded to the outer ring wall of the outer snap ring airbag 5. An inner snap ring groove 13 is provided on the inner ring concave wall 11, and the inner snap ring groove 13 is bonded to the inner ring wall of the inner snap ring airbag 4. The end ring side wall 10 is bonded to the front end face at the cardia position of the gastroscope outer tube 1.

[0031] An air charging tube 14 is provided inside the tube wall of the gastroscope outer tube 1. An inner bronchus 15 and an outer bronchus 16 are provided on the air charging tube 14. The inner bronchus 15 passes through the bottom of the inner ring groove 2 to communicate with the inner snap ring airbag 4, and the outer bronchus 15 passes through the bottom of the outer ring groove 3 to communicate with the outer snap ring airbag 5; a first ventilation hole 17 is provided on the inner ring wall of the inner snap ring airbag 4, a first air inlet hole 18 is provided on the inner snap ring groove 13 of the cardia ring airbag 6, and the first ventilation hole 17 is directly connected to the first air inlet hole 18. A one-way valve 21 for preventing the gas in the cardia ring airbag from discharging is provided inside the first air inlet hole 18, so that the gas in the cardia ring airbag 6 can only enter and cannot exit; a second ventilation hole 19 is provided on the outer ring wall of the outer snap ring airbag 5, a second air inlet hole 20 is provided on the outer snap ring groove 12 of the cardia ring airbag 6, and the second ventilation hole 19 is directly connected to the second air inlet hole 20. A one-way valve 21 is provided inside the second air inlet hole 20, so that the gas in the cardia ring airbag 6 can only enter and cannot exit.

[0032] The esophageal wall airbag assembly includes a second outer ring groove 24, a second outer clamping ring airbag 25, and an esophageal wall ring airbag 26; the second outer clamping ring airbag 25 is fixedly installed on the second outer ring groove 24, and the esophageal wall ring airbag 26 is bonded to the outer ring wall of the second outer clamping ring airbag 25. The inner ring wall of the esophageal wall ring airbag 26 is set as a concave inner ring wall and is bonded to the outer ring wall of the second outer clamping ring airbag 25. A second outward bronchus 27 is provided on the air supply pipe 14. The second outward bronchus 27 passes through the bottom of the second outer ring groove 24 to communicate with the second outer clamping ring airbag 25. A third ventilation hole is provided on the outer ring wall of the second outer clamping ring airbag 25, and a third air inlet hole is provided on the inner ring wall of the esophageal wall ring airbag 26. The third ventilation hole is directly connected to the third air inlet hole, and a one-way valve is provided inside the third air inlet hole, so that the gas in the esophageal wall ring airbag can only enter and cannot exit.

[0033] The bonding is a wet detachment type bonding, that is, it detaches after being wetted in the stomach after use. That is, the outer clamping ring groove is bonded to the outer ring wall of the outer clamping ring airbag before use and detaches after use. All the bondings in this article are wet detachment type bondings.

[0034] Both the cardia ring airbag and the esophageal wall ring airbag are edible timed disintegrating stretchable inflatable airbags, which are made of edible hollow capsule shell materials, can be inflated and elastically expanded. In this embodiment, the disintegration time is set to 4 hours, the gastroscopy examination time is set to 1 hour, the anesthesia time is 3 hours, and the cardia ring airbag and the esophageal wall ring airbag disintegrate 1 hour after waking up from anesthesia and are digested in the stomach.

[0035] As Figure 6 As shown in A, before use, the inner clamping ring airbag 4, the outer clamping ring airbag 5, the cardia ring airbag 6, the second outer clamping ring airbag 25, and the esophageal wall ring airbag 26 are not inflated. The inner clamping ring airbag 4 is recessed in the inner ring groove 2, the outer clamping ring airbag 5 is recessed in the outer ring groove 3, the outer clamping ring groove 12 on the outer ring concave wall 9 of the cardia ring airbag 6 is bonded to the outer clamping ring airbag 5 and is recessed in the outer ring groove 3, the inner clamping ring groove 13 on the inner ring concave wall 11 of the cardia ring airbag 6 is bonded to the inner clamping ring airbag 4 and is recessed in the inner ring groove 2, the end ring side wall 10 is bonded to the front end face of the gastroscope outer tube 1, and the second outer clamping ring airbag 25 and the esophageal wall ring airbag 26 are recessed in the second outer ring groove 24.

[0036] As Figure 6As shown in Figure B, during use, the gastroscope outer sleeve 1 is sleeved on the gastroscope tube and inserted along the gastroscope tube until the front end passes through the cardiac orifice and reaches the inside of the gastric sac. Then, it is inflated through the inflatable tube 14, so that the inner snap-ring airbag 4, the outer snap-ring airbag 5, and the cardiac-ring airbag 6 bulge out respectively beyond the outer ring wall of the gastroscope outer sleeve 1. At the same time, the cardiac-ring airbag 6 bulges, and the outer snap-ring groove 12 on it is stuck on the outer snap-ring airbag 5, and the inner snap-ring groove 13 is stuck on the inner snap-ring airbag 4. At the same time, the outer convex outer wall 22 of the outer convex ring wall on the cardiac-ring airbag 6 is stuck on the cardiac orifice, and the outer convex inner wall 23 of the outer convex ring wall is stuck on the gastroscope tube, so as to prevent gastric contents from refluxing. At this time, the front end of the gastroscope outer sleeve 1 is completely wrapped by the cardiac-ring airbag 6, so that the front end of the gastroscope outer sleeve 1 will not be contaminated with any gastric contents. At the same time, the inflatable tube 14 also inflates the second outer snap-ring airbag 25, and then inflates the esophageal-wall ring airbag 26. Both the second outer snap-ring airbag 25 and the esophageal-wall ring airbag 26 bulge. The second outer snap-ring airbag 25 bulges out beyond the outer ring wall of the gastroscope outer sleeve 1. The concave ring wall on the inner ring wall of the esophageal-wall ring airbag 26 is clamped on the outer ring wall of the second outer snap-ring airbag 25. At the same time, the outer ring wall of the esophageal-wall ring airbag 26 abuts against the esophageal wall. A small amount of gastric contents bypassing the cardiac-ring airbag 6 cannot bypass the esophageal-wall ring airbag 26 anymore, so as to further prevent gastric contents from refluxing.

[0037] As Figure 6 As shown in Figure C, after the gastroscope examination is completed and the patient wakes up from the anesthesia, the gas can be deflated or the gas can be pumped out through the inflatable tube 14. At this time, since the one-way valve 21 resists the outflow of the gas, both the cardiac-ring airbag 6 and the esophageal-wall ring airbag 26 will still bulge and continue to abut against the cardiac orifice or the esophageal wall. However, the gas in the inner snap-ring airbag 4, the outer snap-ring airbag 5, and the second outer snap-ring airbag 25 is pumped out, and the airbags shrink and collapse, and retract into the ring grooves in their respective positions, and the adhesion will automatically detach. Since the front end of the gastroscope outer sleeve 1 was completely wrapped by the cardiac-ring airbag 6 before, the front end of the gastroscope outer sleeve 1 was not contaminated with any gastric contents. When the gastroscope outer sleeve 1 is withdrawn, no gastric contents will stick to the esophageal wall, and even less gastric contents will enter the trachea by mistake, thus effectively avoiding potential safety hazards. The remaining cardiac-ring airbag 6 and esophageal-wall ring airbag 26 are made of an edible hollow capsule shell material, and they will automatically disintegrate and be digested within a set time.

[0038] Furthermore, as Figure 5 shown, on the outer ring wall of the front part of the gastroscope outer sleeve 1, the outer ring wall diameter b on the side of the outer ring groove close to the front end face is smaller than the outer ring wall diameter a on the side of the outer ring groove far from the front end face and larger than the bottom ring diameter c of the outer ring groove. In this way, the tube body of the cardiac-ring airbag 6 before inflation is closely attached to the front end of the gastroscope outer sleeve 1, and its outer diameter after being closely attached is smaller than the main body outer diameter of the gastroscope outer sleeve 1, so that the irritation to the patient's esophageal wall can be reduced during insertion.

[0039] Furthermore, a third outer ring groove is also provided on the outer ring wall of the gastroscope outer tube 1. A third outer clamping ring airbag is fixedly installed on the third outer ring groove. A second esophageal wall ring airbag 28 is adhered to the outer ring wall of the third outer clamping ring airbag. The inner ring wall of the second esophageal wall ring airbag 28 is set as a concave ring wall and is adhered to the outer ring wall of the third outer clamping ring airbag. A third outward bronchus is provided on the air charging tube 14. The third outward bronchus penetrates through the bottom of the third outer ring groove and communicates with the third outer clamping ring airbag. A fourth ventilation hole is provided on the outer ring wall of the third outer clamping ring airbag. A fourth air inlet hole is provided on the inner ring wall of the esophageal wall ring airbag. The fourth ventilation hole is directly connected to the fourth air inlet hole. A one-way valve 21 is provided inside the fourth air inlet hole, so that the gas in the second esophageal wall ring airbag can only enter and cannot exit.

[0040] During use, after the gastroscope outer tube 1 is inserted and the cardia ring airbag 6 and the first esophageal wall ring airbag are inflated, the third outer clamping ring airbag can be further inflated, and then the second esophageal wall ring airbag 28 can be inflated. Both the third outer clamping ring airbag and the second esophageal wall ring airbag 28 will bulge. The third outer clamping ring airbag will bulge out beyond the outer ring wall of the gastroscope outer tube 1. The concave ring wall on the inner ring wall of the second esophageal wall ring airbag 28 will be clamped to the outer ring wall of the third outer clamping ring airbag. At the same time, the outer ring wall of the second esophageal wall ring airbag 28 will abut against the esophageal wall. A small amount of gastric contents that bypass the cardia ring airbag 6 and the first esophageal wall ring airbag can no longer bypass the second esophageal wall ring airbag 28, thus further preventing gastric content reflux.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gastroscope anti-reflux device, characterized in that Comprising a gastroscope outer cannula (1) and a cardia airbag assembly; the front part of the gastroscope outer cannula (1) is provided with an inner ring groove (2) and an outer ring groove (3); the cardia airbag assembly includes an inner snap ring airbag (4), an outer snap ring airbag (5) and a cardia ring airbag (6), the inner ring wall of the outer snap ring airbag (5) is fixedly installed on the bottom ring of the outer ring groove (3), the outer ring wall of the inner snap ring airbag (4) is fixedly installed on the bottom ring of the inner ring groove (2), the cardia ring airbag (6) is composed of an inner concave ring wall (7) and an outer convex ring wall (8), the inner concave ring wall (7) includes an outer ring concave wall (9), an end ring side wall (10) and an inner ring concave wall (11), an outer snap ring groove (12) is provided on the outer ring concave wall (9), the outer snap ring groove (12) is adhesively bonded to the outer ring wall of the outer snap ring airbag (5), an inner snap ring groove (13) is provided on the inner ring concave wall (11), the inner snap ring groove (13) is adhesively bonded to the inner ring wall of the inner snap ring airbag (4), and the end ring side wall (10) is adhesively bonded to the front end face of the gastroscope outer cannula (1); an air charging tube (14) is arranged inside the tube wall of the gastroscope outer cannula (1), an inner bronchus (15) and an outer bronchus (16) are provided on the air charging tube (14), the inner bronchus (15) passes through the bottom of the inner ring groove (2) to communicate with the inner snap ring airbag (4), and the outer bronchus (16) passes through the bottom of the outer ring groove (3) to communicate with the outer snap ring airbag (5); a first ventilation hole (17) is provided on the inner ring wall of the inner snap ring airbag (4), a first air inlet hole (18) is provided on the inner snap ring groove (13), the first ventilation hole (17) is directly communicated with the first air inlet hole (18), and a one-way valve (21) is arranged inside the first air inlet hole (18); a second ventilation hole (19) is provided on the outer ring wall of the outer snap ring airbag (5), a second air inlet hole (20) is provided on the outer snap ring groove (12), the second ventilation hole (19) is directly communicated with the second air inlet hole (20), and a one-way valve (21) is arranged inside the second air inlet hole (20).

2. The gastroscope anti-reflux device according to claim 1, characterized in that The bonding is a wet detachment type bonding.

3. The gastroscope anti-reflux device according to claim 1, wherein The cardia ring airbag (5) is an edible timed disintegrating stretchable inflatable airbag.

4. The gastroscope anti-reflux device according to claim 1, wherein On the outer ring wall of the front part of the gastroscope outer cannula (1), the outer ring wall diameter on the side of the outer ring groove (3) close to the front end face is smaller than the outer ring wall diameter on the side of the outer ring groove (3) far from the front end face and larger than the diameter of the bottom ring of the outer ring groove (3).

5. The gastroscope anti-reflux device according to claim 1, characterized in that An esophageal wall airbag assembly is further provided on the outer circumferential wall of the gastroscope outer cannula (1). The esophageal wall airbag assembly includes a second outer circumferential groove (24), a second outer clamping ring airbag (25), and an esophageal wall circumferential airbag (26); the second outer circumferential groove (24) is fixedly installed with the second outer clamping ring airbag (25), the outer circumferential wall of the second outer clamping ring airbag (25) is bonded with the esophageal wall circumferential airbag (26), the inner circumferential wall of the esophageal wall circumferential airbag (26) is set as a concave inner circumferential wall and is bonded to the outer circumferential wall of the second outer clamping ring airbag (25), a second outward bronchus (27) is provided on the air supply tube (14), the second outward bronchus (27) passes through the bottom of the second outer circumferential groove (24) to communicate with the second outer clamping ring airbag (25), a third ventilation hole is provided on the outer circumferential wall of the second outer clamping ring airbag (25), a third air inlet hole is provided on the inner circumferential wall of the esophageal wall circumferential airbag (26), the third ventilation hole is directly communicated with the third air inlet hole, and a one-way valve is provided inside the third air inlet hole.

6. The gastroscope anti-reflux device according to claim 1, characterized in that A third outer circumferential groove is further provided on the outer circumferential wall of the gastroscope outer cannula. A third outer clamping ring airbag is fixedly installed on the third outer circumferential groove. A second esophageal wall circumferential airbag is bonded to the outer circumferential wall of the third outer clamping ring airbag. The inner circumferential wall of the second esophageal wall circumferential airbag is set as a concave inner circumferential wall and is bonded to the outer circumferential wall of the third outer clamping ring airbag. A third outward bronchus is provided on the air supply tube. The third outward bronchus passes through the bottom of the third outer circumferential groove to communicate with the third outer clamping ring airbag. A fourth ventilation hole is provided on the outer circumferential wall of the third outer clamping ring airbag. A fourth air inlet hole is provided on the inner circumferential wall of the esophageal wall circumferential airbag. The fourth ventilation hole is directly communicated with the fourth air inlet hole. A one-way valve is provided inside the fourth air inlet hole.

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