A gastric tube replacement auxiliary system with a C-shaped buckle, a catheter and a guide wire

Abstract

The application discloses a kind of auxiliary systems with C-shaped buckle, catheter and guide wire for replacing gastric tube, including catheter body, support guide wire, gastric tube and exchange guide wire, catheter body lower end is fixedly connected with C-shaped buckle, C-shaped buckle middle is provided with guide wire through-hole, C-shaped buckle upper end is fixedly connected with flared tube, support guide wire is in catheter body middle, support guide wire upper end is fixedly connected with auxiliary head, the integrated setting of the present application through catheter body and C-shaped buckle can be quickly connected original gastric tube, and the guide path established by original gastric tube avoids the gastric tube curling problem caused by traditional blind insertion from the root, and the two-way guiding and limiting of flared tube, the rigid support of support guide wire and the convenient operation of auxiliary head make the gastric tube replacement realize standardized simple operation, without complex professional skills, not only improve the operation efficiency of medical staff, but also let patient family members can independently complete operation after simple guidance.

Description

Technical Field

[0001] This invention relates to the field of medical assistive device technology, and more specifically, to an assistive system for changing a gastric tube with a C-shaped buckle, a catheter and a guidewire. Background Technology

[0002] A nasogastric tube is an important medical tool whose core function is to establish a lifeline for patients who are unable to eat orally or require gastrointestinal treatment. One of the common uses of a nasogastric tube is nutritional support and drug administration. For patients who are unable to eat orally due to coma, stroke, oral or pharyngeal diseases, a nasogastric tube can directly deliver liquid nutrition solutions or drugs to the stomach or jejunum to ensure the patient's basic nutritional needs and treatment effects, which is an important way to maintain life.

[0003] However, in clinical practice, some patients often have difficulty in the process of inserting a gastric tube. For example, comatose patients may have lost their swallowing function, causing the gastric tube to coil in the throat. Elderly or critically ill patients with poor cooperation will increase the difficulty of the operation. Since the gastric tube has a limited effective usage time, it needs to be replaced after the gastric tube is blocked or exceeds the effective time. The current common method is to directly remove the original gastric tube and reinsert a new gastric tube. However, since some patients have lost their swallowing function or have poor cooperation, the traditional method of reinserting the gastric tube will repeatedly increase the pain or even cause damage to such patients.

[0004] Therefore, in view of the above-mentioned technical problems, it is necessary to provide an auxiliary system for changing gastric tubes with C-shaped buckles, catheters and guidewires. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary system for changing a gastric tube with a C-shaped buckle, a catheter, and a guidewire, so as to solve the above-mentioned problems.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution: An auxiliary system for changing a gastric tube, comprising a C-shaped buckle, a catheter, and a guidewire, includes a catheter body, a support guidewire, a gastric tube, and an exchange guidewire. A C-shaped buckle is fixedly connected to the lower end of the catheter body, with a guidewire through-hole in the center of the C-shaped buckle. A bell-shaped tube is fixedly connected to the upper end of the C-shaped buckle. The support guidewire is located in the middle of the catheter body, with an auxiliary head fixedly connected to its upper end. The gastric tube is matched with the catheter body, the C-shaped buckle, and the bell-shaped tube. A tube head is fixedly connected to the upper end of the gastric tube, and multiple exchange holes are provided on its lower outer end. The exchange guidewire matches the catheter body. The integrated design of the catheter body and the C-shaped buckle allows for quick engagement and stable sliding of the original gastric tube. A guiding path is established based on the original gastric tube to fundamentally avoid blind insertion and coiling problems. The guidewire through-hole of the C-shaped buckle provides access for the support guidewire and the exchange guidewire. The precise channel design and the flared tube provide bidirectional guidance and restraint for the gastric tube insertion and clamping. The support guidewire provides rigid support for the catheter body and C-shaped buckle, preventing bending and deformation during push. The auxiliary head at the upper end allows for convenient hand-held push and removal, lowering the operational threshold. The gastric tube and all components are precisely matched, and the tube head has reinforced structural strength and provides positioning for guidewire insertion. Multiple exchange holes on the lower side of the gastric tube enable stable sliding of the exchange guidewire and avoid single-hole blockage. The exchange guidewire can be left in place to form an esophageal-gastric guiding path, allowing the new gastric tube to be precisely inserted along it. The overall structure enables standardized and simple operation of clamping the original gastric tube, pushing with the auxiliary system, leaving the guidewire in place, removing the original tube, and inserting the new tube. This significantly improves the success rate and operational efficiency of gastric tube replacement for patients with loss of swallowing function and poor cooperation, and effectively reduces gastrointestinal mucosal damage and patient suffering.

[0007] As a further improvement of the present invention, a cover buckle is fixedly connected to the outer end of the upper side of the tube head, which can cover the upper end of the tube head and reduce the falling in of foreign objects.

[0008] As a further improvement of the present invention, a curved strip is fixedly connected to the lower end of the exchange guidewire. The curved strip is made of a soft and tough material, which can reduce the risk of damage to the digestive tract.

[0009] As a further improvement of the present invention, the C-shaped buckle includes a soft outer buckle, which is fixedly connected to the lower end of the catheter body. A pair of soft blocks are fixedly connected in the middle of the soft outer buckle, and a hard inner buckle is fixedly connected to the inner end of the soft outer buckle. An installation groove is provided at the outer end of the soft outer buckle, and an anti-blocking block is provided in the installation groove. By using the soft outer buckle in conjunction with the soft blocks and the hard inner buckle, catheters of different specifications can be clamped.

[0010] As a further improvement of the present invention, the soft outer buckle is made of soft silicone material and the outer surface is fusiform, while the hard inner buckle is made of hard plastic material. By choosing the materials of the soft outer buckle and the hard inner buckle, the original gastric tube can be better wrapped around and the friction of the outer ring can be reduced, increasing the passage and reducing damage to the human body.

[0011] As a further improvement of the present invention, the anti-blocking block includes a screw block, which is threadedly connected to the mounting groove. A rolling groove is formed at the end of the screw block away from the soft outer buckle. A ball is fixedly connected in the rolling groove. A liquid storage tank is formed on the inner wall of the rolling groove. The liquid storage tank is filled with lubricant. A push plate is slidably connected in the liquid storage tank. A rigid tube is fixedly connected to the end of the push plate near the ball, and the rigid tube abuts against the ball. The rigid tube is slidably connected to the inner wall of the fixed groove. During the insertion and removal process, the rolling of the ball can play a lubricating role when moving in the esophagus through the C-shaped buckle. When obstructed, the ball pushes the rigid tube, which pushes the push plate to squeeze the lubricant in the liquid storage tank out from the middle of the rigid tube, thereby improving the lubrication effect.

[0012] As a further improvement of the present invention, the anti-blocking block also includes degreased cotton, which is fixedly connected to the end of the push plate away from the rigid tube. The degreased cotton can absorb and store lubricant for a long time and continuously guide the lubricant to the outer surface of the ball, thereby keeping the ball lubricated.

[0013] As a further improvement of the present invention, the anti-blocking block also includes a spring, which is disposed between the ball and the inner wall of the rolling groove, and the spring is wound around the outer end of the rigid tube. The spring force can push the ball to always abut against the esophageal wall, and when the ball is obstructed and retracts into the rolling groove, the spring force can be used to push the ball to reset.

[0014] As a further improvement of the present invention, the anti-blocking block also includes a sealing ring, which is fixedly connected to the inner wall of the rolling groove near the liquid storage tank. The sealing ring can improve the sealing between the rolling groove and the rigid pipe and reduce the leakage of lubricant from the gap.

[0015] As a further improvement of the present invention, the lubricant is medical liquid paraffin, and the degreased cotton is sterile degreased cotton. By using medical and sterile materials for both the lubricant and the degreased cotton, the safety of the device can be improved.

[0016] Compared with the prior art, the advantages of this invention are: This solution allows for quick connection of the original gastric tube via an integrated design of the catheter body and C-shaped clip. The guidance path established by the original gastric tube fundamentally avoids the tube coiling problem caused by traditional blind insertion. Combined with the bidirectional guiding and limiting of the horn tube, the rigid support of the guidewire, and the convenient operation of the auxiliary head, gastric tube replacement becomes a standardized and simple operation that requires no complicated professional skills. This not only improves the operational efficiency of medical staff but also allows patients' families to complete the operation independently after simple guidance.

[0017] This solution maximizes the safety of gastric tube replacement procedures through multiple structural innovations and material optimizations, significantly reducing patient pain and digestive tract damage. The C-shaped buckle uses a soft silicone spindle-shaped outer buckle paired with a hard plastic inner buckle, which not only securely holds the original gastric tubes of different sizes but also effectively reduces outer friction and improves in-body passage. The soft and flexible curved strip at the lower end of the exchange guidewire conforms to the physiological curvature of the digestive tract, avoiding hard contact that could damage the mucosa. The cap buckle on the tube head reduces the entry of foreign objects, ensuring the cleanliness of the gastric tube. Meanwhile, the ball bearings of the anti-obstruction block convert sliding friction into rolling friction for basic lubrication. When obstructed, it can automatically squeeze out medical liquid paraffin lubricant to enhance the lubrication effect, comprehensively reducing the risk of scratching and puncturing the digestive tract mucosa during the operation.

[0018] This solution uses a C-shaped snap-on soft stop to accommodate different sizes of gastric tubes, improving the system's versatility. The anti-blocking block is removable and replaceable via a threaded connection. The absorbent cotton can continuously store drainage lubricant. The spring enables the ball bearings to automatically reset, and the sealing ring effectively prevents lubricant leakage. Multiple features ensure the continuity and stability of the lubrication function. The multiple exchange holes on the lower side of the gastric tube not only enable stable sliding of the exchange guidewire but also avoid guidewire insertion failure or nutrient solution delivery obstruction caused by blockage of a single hole. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the gastric tube structure of the present invention; Figure 3 This is a schematic diagram of the exchange guidewire structure of the present invention; Figure 4 This is a top sectional view of the C-shaped buckle of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle.

[0020] Explanation of the labels in the diagram: 1. Catheter body; 2. C-shaped buckle; 21. Soft external buckle; 22. Soft stop block; 23. Hard internal buckle; 24. Anti-blocking block; 241. Screw block; 242. Ball bearing; 243. Hard tube; 244. Push plate; 245. Degreased cotton; 246. Lubricant; 247. Spring; 248. Sealing ring; 3. Trumpet tube; 4. Support guidewire; 5. Auxiliary head; 6. Gastric tube; 7. Tube tip; 8. Cap buckle; 9. Exchange guidewire; 10. Curved strip. Detailed Implementation

[0021] The technical solution 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Example 1:

[0023] Please see Figure 1-5 An auxiliary system for changing a gastric tube, comprising a C-shaped buckle, a catheter, and a guidewire, includes a catheter body 1, a support guidewire 4, a gastric tube 6, and an exchange guidewire 9. A C-shaped buckle 2 is fixedly connected to the lower end of the catheter body 1. The C-shaped buckle 2 has a guidewire through-hole in the middle with a diameter of 1 mm. The guidewire channel length is available in various specifications, including 40 cm, 50 cm, and 60 cm. A bell-shaped tube 3 is fixedly connected to the upper end of the C-shaped buckle 2. The support guidewire 4 is located in the middle of the catheter body 1 and is available in 40 cm and 50 cm lengths. Available in various sizes up to 60cm, the gastric tube 6 is fitted with an auxiliary head 5 fixedly connected to the upper end of the guidewire 4. The gastric tube 6 is matched with the catheter body 1, C-shaped clip 2, and bell-shaped tube 3. A tube head 7 is fixedly connected to the upper end of the gastric tube 6. Multiple exchange holes are located on the lower outer end of the gastric tube 6. The exchange guidewire 9 is matched with the catheter body 1, and its length is 100-120cm. The integrated design of the catheter body 1 and C-shaped clip 2 allows for quick and stable connection to the original gastric tube, establishing a guiding path based on the original gastric tube, thus reducing the need for traditional methods. The system addresses issues such as gastric tube coiling during blind insertion; the guidewire through-hole of the C-shaped buckle 2 provides a passage for the support guidewire 4 and exchange guidewire 9, improving the smoothness of guidewire insertion; the bell-shaped tube 3 guides and limits the connection and insertion of the gastric tube, reducing deviation and bending; the support guidewire 4 provides rigid support for the catheter body 1 and C-shaped buckle 2, reducing bending and deformation during pushing; the auxiliary head 5 facilitates hand-held pushing and removal operations, lowering the operational threshold; the gastric tube 6 matches all components, and the tube head 7 strengthens the structural strength of the gastric tube 6 tip and provides positioning for guidewire insertion; the multiple exchange holes on the lower side of the gastric tube 6 enable stable sliding cooperation with the exchange guidewire 9, reducing operational problems caused by single-hole blockage; the exchange guidewire 9 can be left in place to form an esophageal / gastric guiding path, assisting in the precise insertion of the new gastric tube 6. The overall structure makes gastric tube replacement operations simpler and more standardized, improving the success rate and efficiency of such operations, while reducing damage to the patient's digestive tract mucosa and reducing patient suffering.

[0024] A cap 8 is fixedly connected to the upper outer end of the tube head 7. The cap 8 added to the upper outer end of the tube head 7 can cover and protect the upper end of the tube head 7, which can reduce the possibility of foreign objects falling from the tube head 7 into the stomach tube 6 when not in use, maintain the cleanliness of the stomach tube 6, reduce the possibility of foreign objects blocking the stomach tube 6, and improve the stability of the stomach tube 6 in use.

[0025] A curved strip 10 is fixedly connected to the lower end of the exchange guidewire 9. The curved strip 10 is made of a soft and flexible material. The curved strip 10 fixed to the lower end of the exchange guidewire 9 is made of a soft and flexible material, which allows the tip of the exchange guidewire 9 to better conform to the physiological curvature of the human digestive tract, reducing the hard contact between the exchange guidewire 9 and the digestive tract mucosa during insertion and sliding. This can reduce the probability of the guidewire causing damage to the digestive tract mucosa and improve the safety of the operation.

[0026] Example 2:

[0027] Based on Embodiment 1, the C-shaped buckle 2 includes a soft outer buckle 21, which is fixedly connected to the lower end of the conduit body 1. A pair of soft stops 22 are fixedly connected in the middle of the soft outer buckle 21, and a hard inner buckle 23 is fixedly connected to the inner end of the soft outer buckle 21. An installation groove is provided at the outer end of the soft outer buckle 21, and an anti-blocking block 24 is provided in the installation groove. Through the combination structure of the soft outer buckle 21, soft stops 22, hard inner buckle 23 and anti-blocking block 24, the soft outer buckle 21 cooperates with the hard inner buckle. 23 can better fit the outer wall of the gastric tube, and a pair of soft blocks 22 can limit the gastric tube, reducing the possibility of the gastric tube slipping out of the C-shaped buckle 2. At the same time, the inner diameter of the C-shaped buckle 2 is available in various sizes from 6 to 18 Fr, which can be adapted to different sizes of gastric tubes, improving the universal compatibility of the C-shaped buckle 2. The anti-blocking block 24 at the outer end of the soft outer buckle 21 can reduce the resistance when the C-shaped buckle 2 slides in the digestive tract, improve the passability of the C-shaped buckle 2, and make the push of the auxiliary system smoother.

[0028] The soft outer buckle 21 is made of soft silicone and has a spindle-shaped outer surface, while the hard inner buckle 23 is made of hard plastic. By using soft silicone for the soft outer buckle 21 and a spindle-shaped outer surface, and using hard plastic for the hard inner buckle 23, the rigidity of the C-shaped buckle 2 can be ensured, allowing it to better hold the original gastric tube and reduce relative slippage after engagement. The soft silicone outer buckle 21 can reduce the friction between the outer ring of the C-shaped buckle 2 and the digestive tract mucosa, and the spindle-shaped structure can further improve the passage of the C-shaped buckle 2 in the digestive tract, while reducing the possibility of damage to the human body caused by the hard structure.

[0029] The anti-blocking block 24 includes a screw block 241, which is threaded into a mounting groove. A rolling groove is formed at the end of the screw block 241 away from the soft outer thread 21. A ball bearing 242 is fixedly connected within the rolling groove. A liquid storage tank filled with lubricant 246 is formed on the inner wall of the rolling groove. A push plate 244 is slidably connected within the liquid storage tank. A rigid tube 243 is fixedly connected to the end of the push plate 244 near the ball bearing 242, and the rigid tube 243 abuts against the ball bearing 242. The rigid tube 243 is slidably connected to the inner wall of the mounting groove. The screw block 241 of the anti-blocking block 24... 41 is threaded into the mounting slot, facilitating the disassembly and replacement of the anti-blocking block 24 and improving the maintenance convenience of the component; the ball 242 can convert the sliding friction between the C-shaped buckle 2 and the digestive tract into rolling friction, which can play a basic sliding role and reduce sliding resistance; when the C-shaped buckle 2 is obstructed, the ball 242 can push the rigid tube 243 and the push plate 244 to squeeze the lubricant 246 in the liquid storage tank, so that the lubricant 246 overflows from the middle of the rigid tube 243, which can further improve the lubrication effect and help the auxiliary system pass smoothly through the obstructed part.

[0030] The anti-blocking block 24 also includes degreased cotton 245, which is fixedly connected to the end of the push plate 244 away from the rigid tube 243. The degreased cotton 245 added to the push plate 244 can absorb and store the lubricant 246 in the liquid storage tank, so as to realize the continuous flow of lubricant 246 and continuously deliver lubricant 246 to the outer surface of the ball 242, so that the ball 242 always maintains a good lubrication state, ensuring the lubrication effect of the ball 242, and extending the effective service life of the lubricant 246.

[0031] The anti-blocking block 24 also includes a spring 247, which is located between the ball 242 and the inner wall of the rolling groove. The spring 247 is also wound around the outer end of the rigid tube 243. Through the spring 247 located between the ball 242 and the inner wall of the rolling groove, its elasticity can push the ball 242 to always be in contact with the esophageal wall, ensuring that the lubrication function of the ball 242 is effectively exerted. When the ball 242 retracts into the rolling groove due to obstruction, the elasticity of the spring 247 can push the ball 242 to quickly reset, allowing the ball 242 to return to the normal lubrication state, thereby improving the stability and continuity of the lubrication function of the anti-blocking block 24.

[0032] The anti-blocking block 24 also includes a sealing ring 248, which is fixedly connected to the inner wall of the rolling groove near the storage tank. The sealing ring 248 added to the inner wall of the rolling groove can improve the sealing performance between the rolling groove and the rigid pipe 243, reduce the leakage of lubricant 246 from the gap between the rolling groove and the rigid pipe 243 in the storage tank, avoid the ineffective loss of lubricant 246, ensure that there is enough lubricant 246 in the storage tank to cope with the obstruction of sliding, and at the same time reduce unnecessary contact of lubricant 246 leakage to the digestive tract.

[0033] The lubricant 246 uses medical-grade liquid paraffin, and the absorbent cotton 245 uses sterile absorbent cotton. By using medical-grade liquid paraffin for lubricant 246 and sterile absorbent cotton for absorbent cotton 245, the lubricant is suitable for the human digestive tract environment, is non-irritating and has a good lubricating effect, and the sterile absorbent cotton can ensure the sterility during the operation. The combination of the two can improve the safety of the entire auxiliary system in clinical use and reduce the occurrence of digestive tract infection or mucosal irritation caused by consumable material problems.

[0034] Working principle: First, based on the patient's original gastric tube specifications and digestive tract length, select C-shaped clips 2 with inner diameters of 6-18 Fr and support guidewires 4 in lengths of 40cm, 50cm, and 60cm, along with the catheter body 1. Insert the original gastric tube into the C-shaped clip 2 at the lower end of the catheter body 1, achieving a secure fit through the hard inner clip 23 within the soft outer clip 21. A soft stop 22 limits the original gastric tube to prevent slippage, and the flared tube 3 guides the insertion process. Then, insert the support guidewire 4 through the guidewire through-hole of the C-shaped clip 2 into the catheter body 1. Using the auxiliary head 5, manually push the support guidewire 4 to provide rigidity to the catheter body 1 and the C-shaped clip 2. Supporting and propelling the entire auxiliary system along the original gastric tube into the patient's body, during the sliding process, the anti-blocking block 24 on the outside of the C-shaped buckle 2 converts sliding friction into rolling friction through the rolling of the ball bearing 242, achieving basic sliding assistance. The spring 247 pushes the ball bearing 242 to always be in contact with the esophageal wall. If obstruction occurs, the ball bearing 242 is pressed, pushing the rigid tube 243 and the push plate 244 to squeeze the medical liquid paraffin lubricant 246 in the reservoir. The lubricant 246 overflows from the rigid tube 243 to enhance the lubrication effect. The absorbent cotton 245 continuously absorbs and drains the lubricant 246 to ensure the lubrication of the ball bearing 242. The sealing ring 248 effectively prevents... To prevent lubricant 246 leakage, the soft silicone spindle structure of the soft outer buckle 21 further reduces sliding friction. After the C-shaped buckle 2 enters the patient's esophagus and stomach, the support guidewire 4 is removed through the auxiliary head 5. The 100-120cm exchange guidewire 9 is then inserted into the patient's body through the guidewire through-hole. Its lower end, with its soft and flexible curved strip 10, conforms to the physiological curvature of the digestive tract to avoid damaging the mucosa. After the exchange guidewire 9 is in place, the original gastric tube and catheter body 1 are simultaneously removed without retracting the exchange guidewire 9. At this point, the exchange guidewire 9 forms a separate esophageal-gastric guiding path. Then, the tube tip 7 of the new gastric tube 6 is aligned with the exchange guidewire 6. The guide wire 9 is positioned at the end, allowing it to pass through multiple exchange holes on the underside of the gastric tube 6. The bell tube 3 guides and limits the insertion of the new gastric tube 6. After slowly pushing the new gastric tube 6 to the preset position along the exchange guide wire 9, the exchange guide wire 9 is removed, completing the gastric tube replacement. When not in use, the cap 8 on the tube head 7 can cover the tube head 7 to prevent foreign objects from falling into the gastric tube 6. If the anti-blocking block 24 is worn or the lubricant 246 is depleted, it can be unscrewed from the mounting slot by the screw block 241 for disassembly and replacement. Through the coordinated operation of all components, the system establishes a guiding path based on the original gastric tube, enabling convenient and safe replacement of the gastric tube.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An auxiliary system for changing a gastric tube, comprising a C-shaped clip, a catheter, and a guidewire, characterized in that: include: The catheter body (1) is fixedly connected to a C-shaped buckle (2) at its lower end. A guide wire through hole is opened in the middle of the C-shaped buckle (2). A trumpet tube (3) is fixedly connected to the upper end of the C-shaped buckle (2). A support guidewire (4) is located in the middle of the catheter body (1), and an auxiliary head (5) is fixedly connected to the upper end of the support guidewire (4). The gastric tube (6) is matched with the catheter body (1), C-shaped buckle (2) and trumpet tube (3). The upper end of the gastric tube (6) is fixedly connected with a tube head (7). Multiple exchange holes are opened on the lower outer end of the gastric tube (6). The guidewire (9) is exchanged and matched with the catheter body (1).

2. The auxiliary system for changing a gastric tube with a C-shaped buckle, catheter, and guidewire according to claim 1, characterized in that: The outer end of the upper side of the tube head (7) is fixedly connected with a cap buckle (8).

3. The auxiliary system for changing a gastric tube with a C-shaped buckle, catheter, and guidewire according to claim 1, characterized in that: The lower end of the exchange guide wire (9) is fixedly connected to a bending strip (10), which is made of a soft and tough material.

4. The auxiliary system for changing a gastric tube with a C-shaped buckle, catheter, and guidewire according to claim 1, characterized in that: The C-shaped buckle (2) includes a soft outer buckle (21), which is fixedly connected to the lower end of the conduit body (1). A pair of soft blocks (22) are fixedly connected in the middle of the soft outer buckle (21). A hard inner buckle (23) is fixedly connected to the inner end of the soft outer buckle (21). An installation groove is provided at the outer end of the soft outer buckle (21), and an anti-blocking block (24) is provided in the installation groove.

5. The auxiliary system for changing a gastric tube with a C-shaped buckle, catheter, and guidewire according to claim 4, characterized in that: The soft outer buckle (21) is made of soft silicone and has a spindle-shaped outer surface, while the hard inner buckle (23) is made of hard plastic.

6. The auxiliary system for changing a gastric tube with a C-shaped buckle, catheter, and guidewire according to claim 4, characterized in that: The anti-blocking block (24) includes a screw block (241), which is threaded into the mounting groove. A rolling groove is provided at the end of the screw block (241) away from the soft outer buckle (21). A ball (242) is fixedly connected in the rolling groove. A liquid storage tank is provided on the inner wall of the rolling groove. The liquid storage tank is filled with lubricant (246). A push plate (244) is slidably connected in the liquid storage tank. A rigid tube (243) is fixedly connected at the end of the push plate (244) near the ball (242), and the rigid tube (243) abuts against the ball (242). The rigid tube (243) is slidably connected to the inner wall of the fixed groove.

7. An auxiliary system for changing a gastric tube with a C-shaped buckle, a catheter, and a guidewire as described in claim 6, characterized in that: The anti-blocking block (24) also includes degreased cotton (245), which is fixedly connected to the end of the push plate (244) away from the hard tube (243).

8. The auxiliary system for changing a gastric tube with a C-shaped buckle, catheter, and guidewire according to claim 6, characterized in that: The anti-blocking block (24) also includes a spring (247), which is located between the ball (242) and the inner wall of the rolling groove, and the spring (247) is wound around the outer end of the rigid tube (243).

9. An auxiliary system for changing a gastric tube with a C-shaped buckle, a catheter, and a guidewire according to claim 6, characterized in that: The anti-blocking block (24) also includes a sealing ring (248), which is fixedly connected to the inner wall of the rolling groove near the liquid storage tank.

10. An auxiliary system for changing a gastric tube with a C-shaped buckle, a catheter, and a guidewire according to claim 7, characterized in that: The lubricant (246) is medical liquid paraffin, and the degreased cotton (245) is sterile degreased cotton.

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