Positioning anti-falling urinary catheterization assembly

Abstract

The application relates to the technical field of medical accessories, and provides a positioning and anti-falling urinary catheter assembly, which comprises an outer tube, one end of the outer tube is fixedly connected with a tapered part, the inner part of the outer tube is fixedly connected with an inner tube, the inner part of the outer tube is sequentially divided into a urinary catheter cavity and a liquid injection cavity from inside to outside through an isolation part at the top end of the inner tube, and the urinary catheter cavity and the liquid injection cavity are used for urinary catheterization and triggering positioning and anti-falling of the assembly in the bladder; a force applying sleeve is connected with a fixing sleeve through a clamping assembly at the top end of the force applying sleeve, a lubricating assembly is arranged at the top end of the fixing sleeve, and the tapered part and the outer surface of the outer tube are lubricated. The problems that the end part is not lubricated when being inserted and the lubricating oil is easy to dry and fail in the prior art are effectively solved, the silicone oil stored in the liquid bag flows out and infiltrates the related surface after being punctured at the weak part, lubricating operation and catheter preparation process are integrated, the cumbersome step of additional smearing of lubricating oil is reduced, and the lubricating oil is prevented from being dried in advance.

Description

Technical Field

[0001] This invention relates to the field of medical accessory technology, specifically to a positioning and anti-dislodgement catheter assembly. Background Technology

[0002] A urinary catheter is a tube inserted into the bladder through the urethra to drain urine. It is made of natural rubber, latex, or polyvinyl chloride (PVC) and can be inserted into the bladder through the urethra to drain urine. After the urinary catheter is inserted into the bladder, a balloon near the tip of the catheter secures the catheter in the bladder and prevents it from easily falling out. The drainage tube is connected to a urine bag to collect urine.

[0003] A search revealed a self-lubricating urinary catheter with publication number CN113679930A, belonging to the field of urinary catheter technology. This catheter involves an external dilator sleeved on the outer wall of an inner delivery tube. The inner delivery tube contains an internal injection chamber connected to the external dilator. Lubricating oil is pre-introduced into the reservoir via the internal injection chamber. During insertion, due to elastic compression, the lubricating oil seeps evenly from the outer wall of the external dilator, providing real-time lubrication to the urethra and reducing frictional resistance. Pre-lubrication of the external dilator's outer surface is unnecessary. Furthermore, the thermal expansion of the gas stored within the external dilator during insertion causes it to expand outwards moderately, facilitating the expulsion of lubricating oil and providing a degree of flexible expansion of the urethra. Compared to direct, rigid insertion, this reduces damage to the urethra and effectively avoids deformation of the inner delivery tube, preventing obstructed delivery.

[0004] The background art of the aforementioned searched patents mentions that existing technologies often use a layer of lubricating oil to coat the outer surface of the catheter. This method is relatively primitive and cumbersome. If not operated in time, the lubricating oil will dry out, resulting in a poor user experience. The method used in the aforementioned searched patents involves adding an extra layer of tubing for lubricating oil seepage, but lubrication can only be achieved during insertion into the urethra. The end of the catheter is unlubricated when inserted into the urethra, greatly increasing the discomfort of the process. Therefore, to solve the problem of no lubrication in the aforementioned searched patents and to address the problem of lubricating oil drying mentioned in the background art, a positioning and anti-dislodgement catheter assembly is needed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a positioning and anti-dislodgement catheter assembly that solves the problems of lack of lubrication in the patents retrieved in the background art and the drying of lubricating oil mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A positioning and anti-dislodgement urinary catheter assembly, comprising: An outer tube has a tapered portion fixedly connected to one end, and an inner tube fixedly connected to the inside of the outer tube. The inner tube divides the interior of the outer tube into a catheterization chamber and an injection chamber from the inside out through an isolation portion at the top, for catheterization and positioning and anti-dislodgement of the trigger positioning anti-dislodgement component inside the bladder. The force-applying sleeve has a fixed sleeve connected to its top end via a snap-fit ​​assembly. The fixed sleeve has a lubrication assembly at its top end to lubricate the tapered part and the outer surface of the outer tube, making it easier to insert into the urethra. The inner wall of the force-applying sleeve is fixedly connected with multiple one-way gripping protrusions, which work in conjunction with the butterfly-shaped wing plate fixed to the outer wall of the force-applying sleeve to apply force and assist in the advancement of the outer tube when it is inserted into the urethra. A fixing patch is used, one side of which is wrapped around the outer tube to fix it, and the other side of which is attached to the patient's thigh with an adhesive patch to fix the intubation assembly.

[0007] Preferably, the positioning and anti-detachment component includes an expansion bladder portion disposed at the top end of the outer tube. The wall thickness of the expansion bladder portion is less than the wall thickness of the outer tube. The expansion bladder portion is located in the injection chamber. An injection port is fixedly connected to the bottom end of the injection chamber, and two one-way valve diaphragms are provided at the opening of the injection port to prevent liquid leakage.

[0008] Preferably, the conical part is conical in shape and has a connecting hole on its outer wall, which is connected to the urinary catheterization cavity inside the inner tube. The bottom end of the urinary catheterization cavity is fixedly connected to an outlet for connecting an external urinary catheterization bag.

[0009] Preferably, the snap-fit ​​assembly includes a limiting protrusion fixedly connected to the outer wall of the top end of the force-applying sleeve, and the inner wall of the fixed sleeve is provided with a fitting groove, which is adapted to the limiting protrusion.

[0010] Preferably, the lubrication assembly includes a sleeve fixedly connected to the top of the fixed sleeve, a liquid bladder fixedly connected to the side of the sleeve, the liquid bladder storing silicone oil for lubrication, the bottom side of the liquid bladder being concave, and a thin thin weak part being provided at the center of the concave area, the sleeve, the liquid bladder and the weak part being made of medical silicone, and the weak part being punctured by squeezing the top of the conical part.

[0011] Preferably, one side of the unidirectional gripping protrusion is arc-shaped, and the top of the unidirectional gripping protrusion is bent and abuts against the outer tube. The abutting part of the unidirectional gripping protrusion is provided with a friction part to increase friction. The other side of the unidirectional gripping protrusion is provided with a concave-convex friction part. After the top of the unidirectional gripping protrusion is rolled up, the concave-convex friction part will abut against the outer wall of the outer tube, providing gripping ability.

[0012] Preferably, the wrapping patch includes a main fixing band and a secondary fixing band. The main fixing band is fixedly connected to one side of the fixing patch, and the secondary fixing band is fixedly connected to the other side of the fixing patch. A pull bracket is fixedly connected to the adjacent side of the main fixing band and the secondary fixing band, and the two pull brackets are respectively located at both ends of the fixing patch. Adhesive is provided on the adjacent side of the main fixing band and the secondary fixing band for adhering to the outer surface of the outer tube.

[0013] Preferably, the bottom end of the butterfly-shaped wing plate is provided with a slot that matches the top end of the pull bracket. The pull bracket and the butterfly-shaped wing plate are interlocked to pull the two pull brackets to shift, thereby tightening the main fixing strap and the secondary fixing strap and improving the fixing ability.

[0014] Preferably, the adhesive patch includes a connecting cotton pad, one end of which is fixedly connected to a fixing patch, and the other end of which is fixedly connected to an adhesive layer with adhesive properties, so as to be adhered to the patient's thigh.

[0015] A method for using a positioning and anti-dislodgement urinary catheter assembly includes the following steps: Step 1: After disinfection and completion of pre-catheterization, unpack the catheter assembly and check its integrity. Once confirmed, press the top of the sleeve to deform the internal structure, causing the weak part to be ruptured by the top of the conical part. The lubricating silicone oil in the bladder will flow out and wet the outer surface of the conical part. The silicone oil will concentrate in the gap between the outer tube and the force-applying sleeve. Pull the fixing sleeve off, then pull the force-applying sleeve and insert the conical part into the urethra according to medical standards. Step 2: During the process of pushing the outer tube into the urethra, with the assistance of the force-applying sleeve, after inserting it a certain distance, pull back the force-applying sleeve to make it slide on the surface of the outer tube. The lubricating silicone oil inside the sleeve is evenly applied to the surface of the outer tube. When sliding, the unidirectional gripping of the protruding top is applied with force, and the bent part is moved away from the outer tube, so that the concave and convex friction parts do not contact the outer tube, so that the friction between the outer tube and the force-applying sleeve is minimized, the insertion part of the outer tube increases, and then the insertion work continues. Step 3: When continuing insertion, the force-applying sleeve, together with the butterfly-shaped wing plate, pushes forward as the force-applying part. The outer tube and the one-way gripping protrusion are subjected to force. This force drives the curved part of the protrusion to approach and contact the outer tube. With the assistance of the contact friction part, the force is increased until the concave and convex friction parts stick to the surface of the outer tube to provide gripping ability. When the force-applying sleeve is pushed forward, the outer tube is pushed forward at the same time. Repeat the above low-friction sliding and gripping synchronous pushing process. Step 4: Repeat the above process until the conical part is pushed into the patient's bladder. Under the pressure of the body, the urine in the bladder enters the catheterization cavity through the connecting hole on the conical part and flows out from the outlet. Connect the catheterization bag to the outlet, insert the syringe into the injection port, and inject a certain amount of physiological saline into the injection cavity. Since the wall thickness of the expansion balloon is smaller than that of the outer tube, the hydraulic pressure is concentrated after injection, causing the expansion balloon to expand and form a limiting balloon in the bladder to prevent the catheter from falling out. Step 5: Place the main and auxiliary fixing bands of the fixing patch on the end of the outer tube, remove the release paper from the adhesive layer, and attach the structure including the fixing patch to the patient's thigh. Then, remove the release paper from the main and auxiliary fixing bands and let them adhere to the corresponding outer tube surface. Then, pull the force sleeve to the end to prepare for the final fixing operation, so that the slot on the butterfly wing plate engages with the traction seat, in preparation for the outer tube to be wrapped and fixed. Step Six: Engage the slot on the butterfly-shaped wing plate with the traction bracket, causing the main and auxiliary fixing straps to be pulled apart by the traction bracket, thus further securing the outer tube. The main and auxiliary fixing straps are then fitted onto the end of the outer tube and adhered to the surface. Together with the traction bracket, they engage the butterfly-shaped wing plate, completing the overall fixation of the urinary catheter. Working principle: Before inserting the urinary catheter, preparatory work including disinfection is performed first. Then, the urinary catheter assembly is unsealed and checked for integrity. After confirmation, the top of the sheath is pressed, causing the sheath and its internal structure to deform together. The weakest part is pressed against the top of the cone, causing the weakest part to rupture and allowing the lubricating silicone oil inside the bladder to flow out. At this time, the sheath is pressed to squeeze out all the remaining silicone oil and wet the outer surface of the cone. The silicone oil will concentrate in the gap between the outer tube and the force-applying sleeve. Then, the fixing sleeve is pulled to detach it from the force-applying sleeve. The force-applying sleeve is pulled to the rear end, and the cone is inserted into the patient's urethra according to medical standards. During the insertion of the outer tube into the patient's urethra, a force-applying sleeve is used for assistance. After insertion to a certain distance, the force-applying sleeve is pulled back, allowing it to slide on the surface of the outer tube. The lubricating silicone oil in the force-applying sleeve is evenly applied to the surface of the outer tube. During the sliding process, when the unidirectional gripping protrusion is subjected to force, the curved part bends away from the outer tube, preventing the concave-convex friction part from contacting the outer tube. This minimizes the friction between the outer tube and the force-applying sleeve, increasing the insertion distance of the outer tube. Insertion continues, with the force-applying sleeve, in conjunction with the butterfly-shaped wing plate, acting as the force-applying part. Force is applied forward, and the outer tube is subjected to force at the unidirectional gripping protrusion. This force drives the curved part of the unidirectional gripping protrusion closer to the outer tube, and... As the tube comes into contact with the outer tube, the force gradually increases with the assistance of the contacting friction part until the concave and convex friction parts adhere to the surface of the outer tube, providing gripping ability. This allows the outer tube to be pushed forward simultaneously when the force-applying sleeve is advanced. The above process is repeated until the conical part is pushed into the patient's bladder. Under the pressure of the human body, the urine in the bladder enters the catheterization cavity through the connecting hole on the conical part. When it flows out from the outlet, the catheterization bag is connected to the outlet, and the syringe is inserted into the injection port to inject a certain amount of physiological saline into the injection cavity. Since the wall thickness of the expansion balloon is smaller than that of the outer tube, the hydraulic pressure in the injection cavity after injection is concentrated in the expansion balloon, causing the expansion balloon to expand and form a limiting balloon in the bladder to prevent the catheter from falling out of the bladder. Place the main and secondary fixation straps on the fixation patch onto the end of the outer tube. Remove the release paper from the adhesive layer and attach the structure, including the fixation patch, to the patient's thigh. Next, remove the release paper from the main and secondary fixation straps, allowing the main fixation strap and the traction bracket to adhere to the surface of the corresponding position of the outer tube. Then, pull the force sleeve to its end, engaging the slot on the butterfly wing plate with the traction bracket. This causes the main and secondary fixation straps to be pulled by the traction bracket, resulting in tension in opposite directions, thereby further wrapping and fixing the outer tube, thus completing the fixation of the urinary catheter.

[0016] This invention provides a positioning and anti-dislodgement catheter assembly. It has the following beneficial effects: 1. This invention allows for lubrication of the conical portion and outer surface of the catheter before insertion, effectively solving the problems of lack of lubrication during insertion and easy drying and failure of lubricating oil in existing technologies. The silicone oil stored in the bladder flows out and wets the relevant surfaces after the weak part is punctured, integrating the lubrication operation with the catheter preparation process. This reduces the tedious steps of applying additional lubricating oil, avoids premature drying of the lubricating oil, significantly reduces frictional resistance during insertion, and improves patient comfort and the smoothness of the catheter insertion operation.

[0017] 2. This invention utilizes a special structural design with a unidirectional gripping protrusion on the inner wall of the force-applying sleeve. Combined with the synergistic effect of the contact friction part and the concave-convex friction part, it achieves intelligent switching of friction force during the advancement and retraction of the outer tube. When the force-applying sleeve is pulled back, the protrusion bends away from the outer tube, minimizing friction force and facilitating uniform application of silicone oil. When pushed forward, the top of the protrusion curls up and adheres to the surface of the outer tube, providing strong gripping force. This effectively overcomes the problem of traditional urinary catheters being slippery and difficult to grip and advance after being coated with lubricating oil. It significantly improves the convenience and efficiency of catheter insertion operations for medical personnel, while reducing insertion deviation caused by unstable gripping.

[0018] 3. This invention constructs a multi-layered external fixation mechanism. The fixation patch is adhered to the patient's thigh by an adhesive patch to provide basic fixation. The main fixation band and the secondary fixation band are wrapped and adhered to the surface of the outer tube to achieve mid-section restraint. After the butterfly-shaped wing plate is engaged with the traction seat, it generates a tension force in opposite directions, further tightening the wrapped patch. This composite fixation structure forms a progressive fixation system from adhesion to the thigh skin, wrapping around the outer wall of the catheter, to the end engagement and tightening. It significantly enhances the overall anti-slipping ability of the urinary catheter assembly and effectively prevents the catheter from shifting and shaking outside the body. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the unopened state of the present invention; Figure 3 This is a schematic diagram of the inflatable bladder in the inflated state of the present invention; Figure 4 This is a schematic diagram showing the position of the liquid bladder in this invention; Figure 5 This is a schematic diagram of the bottom structure of the liquid bladder of the present invention; Figure 6 This is a schematic diagram showing the position of the limiting protrusion of the present invention; Figure 7 This is a schematic diagram showing the location of the isolation section of the present invention; Figure 8 This is a schematic diagram of the connection structure between the injection port and the outlet of the present invention; Figure 9 This is a schematic diagram showing the position of the unidirectional gripping protrusion of the present invention; Figure 10 This is a schematic diagram of the unidirectional gripping protrusion of the present invention; Figure 11 This is a schematic diagram of the force applied to the unidirectional gripping protrusion of the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the force applied to the unidirectional gripping protrusion of the present invention. Figure 2 ; Figure 13 This is a schematic diagram of the structure of the pull-out bracket of the present invention; Figure 14 This is a schematic diagram of the connecting structure of the connecting cotton of the present invention; Figure 15 This is a schematic diagram of the secondary fixing strap of the present invention.

[0020] The components are as follows: 1. Outer tube; 2. Force-applying sleeve; 3. Fixing patch; 4. Fixing sleeve; 5. Sleeve head; 6. Liquid bladder; 7. Weak part; 8. Conical part; 9. Limiting protrusion; 10. Sleeve groove; 11. Inner tube; 12. Isolation part; 13. Expansion bladder part; 14. Injection port; 15. One-way valve diaphragm; 16. Liquid outlet; 17. One-way gripping protrusion; 18. Concave-convex friction part; 19. Abutting friction part; 20. Butterfly wing plate; 21. Main fixing band; 22. Secondary fixing band; 23. Pulling bracket; 24. Connecting cotton pad; 25. Adhesive layer. Detailed Implementation

[0021] 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.

[0022] Example: As one aspect of this application, embodiments of the present invention provide a positioning and anti-dislodgement urinary catheter assembly, comprising: Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 7 The outer tube 1 has a tapered part 8 fixedly connected to one end, and an inner tube 11 fixedly connected to the inside of the outer tube 1. The inner tube 11 divides the inside of the outer tube 1 into a urination chamber and an injection chamber from the inside to the outside through the isolation part 12 at the top end, so as to use the urination and the positioning and anti-dislodgement component for positioning and anti-dislodgement inside the bladder. Specifically, the entire catheter assembly is made of medical-grade silicone. The non-medical silicone parts include a butterfly-shaped wing plate 20, a one-way valve diaphragm 15, and an outlet 16. It has undergone medical-grade sterilization and sealing, and meets medical safety standards provided it has not been affected by external factors before unsealing. Before inserting the urinary catheter, pre-catheterization procedures, including sterilization, should be performed first. Then, the catheter assembly should be unsealed and inspected for integrity. For the unsealed state, please refer to the attached document. Figure 2 .

[0023] Please see the appendix Figure 3 Appendix Figure 7 and attached Figure 8The positioning and anti-detachment component includes an expansion bladder 13 located at the top of the outer tube 1. The wall thickness of the expansion bladder 13 is less than that of the outer tube 1. The expansion bladder 13 is located in the injection chamber. An injection port 14 is fixedly connected to the bottom of the injection chamber. Two one-way valve diaphragms 15 are provided at the opening of the injection port 14 to prevent liquid leakage.

[0024] For details on the expansion state, please refer to the appendix. Figure 3 After the conical part 8 enters the bladder, the syringe is inserted into the injection port 14 to inject a certain amount of physiological saline into the injection cavity. Since the wall thickness of the expansion balloon part 13 is less than that of the outer tube 1, the hydraulic pressure of the injection cavity after injection is concentrated in the expansion balloon part 13, causing the expansion balloon part 13 to expand and form a balloon for limiting the position in the bladder, preventing the urinary catheter from falling out in the bladder.

[0025] Please see the appendix Figure 7 and attached Figure 8 The conical part 8 is conical in shape and has a connecting hole on its outer wall, which is connected to the urinary catheterization cavity inside the inner tube 11. The bottom end of the urinary catheterization cavity is fixedly connected to the outlet 16 for connecting an external urinary catheterization bag. Specifically, the conical part 8 is pushed into the patient's bladder. Under the pressure of the body, the urine in the bladder enters the catheterization cavity through the connecting hole on the conical part 8. When it flows out from the outlet 16, the catheterization bag is connected to the outlet 16.

[0026] Please see the appendix Figure 2 Appendix Figure 4 and attached Figure 6 The force-applying sleeve 2 has a fixed sleeve 4 connected to its top end via a snap-fit ​​assembly. The force-applying sleeve 2 and the outer tube 1 are not fixed and can be separated and removed. There is no rigid fixing structure between them; they are only fitted together to facilitate removal and inspection of the integrity of each structure. The top end of the fixed sleeve 4 is equipped with a lubrication assembly to lubricate the tapered part 8 and the outer surface of the outer tube 1, making it easier to insert into the urethra. The inner wall of the force-applying sleeve 2 is fixedly connected with multiple one-way gripping protrusions 17, which work in conjunction with the butterfly-shaped wing plate 20 fixed to the outer wall of the force-applying sleeve 2 to apply force and assist the advancement of the outer tube 1 when it is inserted into the urethra. Please see the appendix Figure 4 -Appendix Figure 6 The snap-fit ​​assembly includes a limiting protrusion 9 fixedly connected to the outer wall of the top end of the force-applying sleeve 2. The inner wall of the fixed sleeve 4 is provided with a fitting groove 10, which is adapted to the limiting protrusion 9. The lubrication assembly includes a sleeve head 5 fixedly connected to the top end of the fixed sleeve 4. A liquid bladder 6 is fixedly connected to the side of the sleeve head 5. The liquid bladder 6 stores silicone oil for lubrication. The bottom side of the liquid bladder 6 is concave, and a thin layer of weak part 7 is provided in the center of the concave part. The sleeve head 5, the liquid bladder 6 and the weak part 7 are all made of medical silicone. The weak part 7 is punctured by the top end of the conical part 8. Specifically, pressing the top of the sleeve 5 causes the sleeve 5 and its internal structure to deform together, causing the weakest part 7 to press against the top of the conical part 8, thus rupturing the weakest part 7 and allowing the lubricating silicone oil inside the fluid bladder 6 to flow out. At this time, pressing the sleeve 5 squeezes out all the remaining silicone oil and wets the outer surface of the conical part 8. The silicone oil will concentrate in the gap between the outer tube 1 and the force-applying sleeve 2. As the force-applying sleeve 2 slides on the surface of the outer tube 1, the lubricating silicone oil in the force-applying sleeve 2 is evenly applied to the surface of the outer tube 1, thereby reducing the additional lubricating silicone oil application process and integrating the application and advancement of the urinary catheter.

[0027] Please see the appendix Figure 9 and attached Figure 10 One side of the one-way gripping protrusion 17 is arc-shaped, and the top of the one-way gripping protrusion 17 is bent and abuts against the outer tube 1. The abutting part of the one-way gripping protrusion 17 is provided with a friction part 19 to increase friction. The other side of the one-way gripping protrusion 17 is provided with a concave-convex friction part 18. After the top of the one-way gripping protrusion 17 is rolled up, the concave-convex friction part 18 abuts against the outer wall of the outer tube 1 to provide gripping ability. Specifically, during the process of pushing the outer tube 1 into the patient's urethra, the force-applying sleeve 2 provides assistance. After being inserted to a certain distance, the force-applying sleeve 2 is pulled back, causing it to slide on the surface of the outer tube 1. The lubricating silicone oil in the force-applying sleeve 2 is evenly applied to the surface of the outer tube 1. During the sliding process, when the top of the unidirectional gripping protrusion 17 is subjected to force, the bent part bends away from the outer tube 1, preventing the concave-convex friction part 18 from contacting the outer tube 1. This minimizes the friction between the outer tube 1 and the force-applying sleeve 2. For the force state, please refer to the appendix. Figure 11 The insertion portion of the outer tube 1 is increased, and the insertion process continues. During insertion, the force-applying sleeve 2, in conjunction with the butterfly-shaped wing plate 20, acts as the force-applying part, pushing forward. The outer tube 1 and the tip of the one-way gripping protrusion 17 are subjected to force. The direction of this force drives the curved portion of the tip of the one-way gripping protrusion 17 towards the outer tube 1 and into contact with it. With the assistance of the contact friction part 19, the force gradually increases until the concave-convex friction part 18 adheres to the surface of the outer tube 1, providing gripping ability. This allows the outer tube 1 to be advanced synchronously when the force-applying sleeve 2 is advanced. For the force state, please refer to the appendix. Figure 12 By performing the above operations, the problem of difficulty in holding and advancing the urinary catheter after applying lubricating silicone oil can be overcome.

[0028] Please see the appendix Figure 3 The fixing patch 3 is used to fix the outer tube 1 by wrapping the patch on one side, and the other side of the fixing patch 3 is attached to the patient's thigh by an adhesive patch to fix the intubation assembly.

[0029] Please see the appendix Figure 13 -Appendix Figure 15The wrapping patch includes a main fixing band 21 and a secondary fixing band 22. The main fixing band 21 is fixedly connected to one side of the fixing patch 3, and the secondary fixing band 22 is fixedly connected to the other side of the fixing patch 3. Pull-out brackets 23 are fixedly connected to adjacent sides of both the main fixing band 21 and the secondary fixing band 22, and the two pull-out brackets 23 are located at opposite ends of the fixing patch 3. Adhesive is provided on adjacent sides of both the main fixing band 21 and the secondary fixing band 22 for adhesion to the outer surface of the outer tube 1. The bottom end of the butterfly-shaped wing plate 20 is provided with a slot that matches the top end of the traction seat 23. The traction seat 23 and the butterfly-shaped wing plate 20 are interlocked to pull the two traction seats 23 to shift, thereby tightening the main fixation strap 21 and the secondary fixation strap 22 and improving the fixation ability. The adhesive patch includes a connecting cotton pad 24. One end of the connecting cotton pad 24 is fixedly connected to the fixation patch 3, and the other end of the connecting cotton pad 24 is fixedly connected to an adhesive layer 25 with adhesive properties to be adhered to the patient's thigh. Specifically, the wrapping patch and adhesive patch are additional accessories used to fix the end of the catheter assembly to the patient's thigh. They are mainly made of medical-grade cotton pads and adhesive to prevent the catheter assembly from falling off. Components with adhesive functions are provided with release paper before unpacking. Before fixation, the maximum diameter of the main fixation band 21 and the secondary fixation band 22 after being stretched allows the one-way valve diaphragm 15 at the bottom and the outlet 16, along with the outer tube 1, to pass through the main fixation band 21 and the secondary fixation band 22 under a certain degree of deformation support. After inserting the urinary catheter, the main fixation band 21 and the secondary fixation band 22 on the fixation patch 3 are placed on the end of the outer tube 1. The release paper on the adhesive layer 25 is removed, and the structure including the fixation patch 3 is attached to the patient's thigh. Then, the release paper on the main fixation band 21 and the secondary fixation band 22 is removed, and the main fixation band 21 and the traction seat 23 are attached to the surface of the corresponding position of the outer tube 1. Then, the force sleeve 2 is pulled to the end, and the slot on the butterfly wing plate 20 is engaged with the traction seat 23, so that the main fixation band 21 and the secondary fixation band 22 are pulled by the traction seat 23 respectively, resulting in tension in opposite directions, thereby further wrapping and fixing the outer tube 1, thus completing the fixation of the urinary catheter.

[0030] Based on the aforementioned positioning and anti-dislodgement urinary catheter assembly, as another aspect of this application, a method of using the positioning and anti-dislodgement urinary catheter assembly includes the following steps: Step 1: After disinfection and completion of pre-catheterization, unpack the catheter assembly and check its integrity. After confirmation, press the top of the sleeve 5 to deform the internal structure, causing the weak part 7 to be ruptured by the top of the conical part 8. The lubricating silicone oil in the fluid balloon 6 flows out and wets the outer surface of the conical part 8. The silicone oil concentrates in the gap between the outer tube 1 and the force-applying sleeve 2. Pull the fixing sleeve 4 to remove it, then pull the force-applying sleeve 2 and insert the conical part 8 into the urethra according to medical standards. Step 2: During the process of pushing the outer tube 1 into the urethra, with the assistance of the force-applying sleeve 2, after inserting a certain distance, pull back the force-applying sleeve 2 to make it slide on the surface of the outer tube 1. The lubricating silicone oil inside the sleeve is evenly applied to the surface of the outer tube 1. When sliding, the top of the protrusion 17 is grasped in one direction and the bent part is away from the outer tube 1, so that the concave and convex friction part 18 does not contact the outer tube 1, so that the friction between the outer tube 1 and the force-applying sleeve 2 is minimized, the insertion part of the outer tube 1 is increased, and then the insertion work continues. Step 3: When inserting, the force-applying sleeve 2, together with the butterfly wing plate 20, pushes forward as the force-applying part. The outer tube 1 and the top of the one-way gripping protrusion 17 are subjected to force. This force drives the curved part of the top of the protrusion to approach and contact the outer tube 1. With the assistance of the contact friction part 19, the force is increased until the concave and convex friction part 18 sticks to the surface of the outer tube 1 to provide gripping ability. When the force-applying sleeve 2 is pushed forward, the outer tube 1 is pushed forward simultaneously. The above low-friction sliding and gripping synchronous pushing process is repeated. Step 4: Repeat the above process until the conical part 8 is pushed into the patient's bladder. Under the pressure of the human body, the urine in the bladder enters the catheterization cavity through the connecting hole on the conical part 8 and flows out from the outlet 16. Connect the catheterization bag to the outlet 16, insert the syringe into the injection port 14, and inject a certain amount of physiological saline into the injection cavity. Since the wall thickness of the expansion balloon 13 is smaller than that of the outer tube 1, the hydraulic pressure is concentrated after injection, causing the expansion balloon 13 to expand and form a limiting balloon in the bladder to prevent the catheter from falling out. Step 5: Slide the main fixing band 21 and the auxiliary fixing band 22 of the fixing patch 3 onto the end of the outer tube 1, remove the release paper on the adhesive layer 25, and attach the structure including the fixing patch 3 to the patient's thigh. Then remove the release paper on the main fixing band 21 and the auxiliary fixing band 22 and attach them to the corresponding surface of the outer tube 1. Then pull the force sleeve 2 to the end to prepare for the final fixing operation, so that the slot on the butterfly wing plate 20 engages with the traction seat 23 to prepare for the outer tube 1 to be wrapped and fixed. Step Six: Engage the slot on the butterfly-shaped wing plate 20 with the traction seat 23, causing the main fixing strap 21 and the auxiliary fixing strap 22 to be pulled by the traction seat 23, resulting in tension in opposite directions. This further secures the outer tube 1. The main fixing strap 21 and the auxiliary fixing strap 22 are fitted onto the end of the outer tube 1 and adhered to the surface. Together with the traction seat 23, they engage with the butterfly-shaped wing plate 20, completing the overall fixation of the urinary catheter. 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 positioning and anti-dislodgement urinary catheter assembly, characterized in that, include: An outer tube (1) is fixedly connected to a tapered part (8) at one end, and an inner tube (11) is fixedly connected inside the outer tube (1). The inner tube (11) divides the interior of the outer tube (1) into a catheterization chamber and an injection chamber from the inside to the outside through an isolation part (12) at the top, for catheterization and positioning and anti-dislodgement of the trigger positioning anti-dislodgement component inside the bladder. The force-applying sleeve (2) has a fixed sleeve (4) connected to its top end via a snap-fit ​​assembly. The fixed sleeve (4) has a lubrication assembly at its top end to lubricate the tapered part (8) and the outer surface of the outer tube (1), making it easier to insert into the urethra. The inner wall of the force-applying sleeve (2) is fixedly connected with multiple one-way gripping protrusions (17), which work in conjunction with the butterfly-shaped wing plate (20) fixed to the outer wall of the force-applying sleeve (2) to apply force and assist the advancement of the outer tube (1) when it is inserted into the urethra. The fixing patch (3) is used to fix the outer tube (1) on one side by wrapping the patch, and the other side of the fixing patch (3) is attached to the patient's thigh by an adhesive patch to fix the intubation assembly.

2. The positioning and anti-dislodgement catheter assembly according to claim 1, characterized in that, The positioning and anti-detachment component includes an expansion bladder (13) disposed at the top of the outer tube (1). The wall thickness of the expansion bladder (13) is less than the wall thickness of the outer tube (1). The expansion bladder (13) is located in the injection chamber. An injection port (14) is fixedly connected to the bottom of the injection chamber. Two one-way valve diaphragms (15) are provided at the opening of the injection port (14) to prevent liquid leakage.

3. The positioning and anti-dislodgement catheter assembly according to claim 1, characterized in that, The conical part (8) is conical in shape and has a connecting hole on its outer wall, which is connected to the urinary catheterization cavity inside the inner tube (11). The bottom end of the urinary catheterization cavity is fixedly connected to an outlet (16) for connecting an external urinary catheterization bag.

4. A positioning and anti-dislodgement catheter assembly according to claim 1, characterized in that, The snap-fit ​​assembly includes a limiting protrusion (9) fixedly connected to the outer wall of the top of the force-applying sleeve (2), and a fitting groove (10) is provided on the inner wall of the fixing sleeve (4), which is adapted to the limiting protrusion (9).

5. A positioning and anti-dislodgement catheter assembly according to claim 1, characterized in that, The lubrication assembly includes a sleeve (5) fixedly connected to the top of the fixed sleeve (4). A liquid bladder (6) is fixedly connected to the side of the sleeve (5). The liquid bladder (6) stores silicone oil for lubrication. The bottom side of the liquid bladder (6) is concave, and a thin weak part (7) is provided in the center of the concave area. The sleeve (5), liquid bladder (6) and weak part (7) are all made of medical silicone. The weak part (7) is punctured by the top of the conical part (8).

6. A positioning and anti-dislodgement catheter assembly according to claim 1, characterized in that, One side of the one-way gripping protrusion (17) is arc-shaped, and the top of the one-way gripping protrusion (17) is bent and abuts against the outer tube (1). The abutting part of the one-way gripping protrusion (17) is provided with a friction part (19) to increase friction. The other side of the one-way gripping protrusion (17) is provided with a concave-convex friction part (18). After the top of the one-way gripping protrusion (17) is rolled up, the concave-convex friction part (18) abuts against the outer wall of the outer tube (1) to provide gripping ability.

7. A positioning and anti-dislodgement catheter assembly according to claim 1, characterized in that, The wrapping patch includes a main fixing band (21) and a secondary fixing band (22). The main fixing band (21) is fixedly connected to one side of the fixing patch (3), and the secondary fixing band (22) is fixedly connected to the other side of the fixing patch (3). Pulling brackets (23) are fixedly connected to the adjacent sides of the main fixing band (21) and the secondary fixing band (22), and the two pulling brackets (23) are located at both ends of the fixing patch (3). Adhesive is provided on the adjacent sides of the main fixing band (21) and the secondary fixing band (22) for adhering to the outer surface of the outer tube (1).

8. A positioning and anti-dislodgement catheter assembly according to claim 7, characterized in that, The bottom end of the butterfly-shaped wing plate (20) is provided with a slot that matches the top end of the pull-out bracket (23). The pull-out bracket (23) and the butterfly-shaped wing plate (20) are interlocked to pull the two pull-out brackets (23) to shift, thereby tightening the main fixing strap (21) and the secondary fixing strap (22) and improving the fixing ability.

9. A positioning and anti-dislodgement catheter assembly according to claim 1, characterized in that, The adhesive patch includes a connecting cotton pad (24), one end of which is fixedly connected to a fixing patch (3), and the other end of which is fixedly connected to an adhesive layer (25) with adhesive properties, so as to be adhered to the patient's thigh.

10. A method of using a positioning and anti-dislodgement urinary catheter assembly, comprising using the positioning and anti-dislodgement urinary catheter assembly as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: After disinfection and completion of the pre-catheterization work, unpack the catheterization assembly and check its integrity. After confirmation, press the top of the sleeve (5) to deform the internal structure, so that the weak part (7) is ruptured by the top of the cone part (8). The lubricating silicone oil in the fluid sac (6) flows out and wets the outer surface of the cone part (8). The silicone oil concentrates in the gap between the outer tube (1) and the force sleeve (2). Pull the fixing sleeve (4) off, then pull the force sleeve (2) and insert the cone part (8) into the urethra according to medical standards. Step 2: During the process of pushing the outer tube (1) into the urethra, with the assistance of the force-applying sleeve (2), after inserting a certain distance, pull back the force-applying sleeve (2) to make it slide on the surface of the outer tube (1). The lubricating silicone oil inside the sleeve is evenly applied to the surface of the outer tube (1). When sliding, the top of the protrusion (17) is grasped in one direction and subjected to force. The bent part is away from the outer tube (1), so that the concave and convex friction part (18) does not contact the outer tube (1), so that the friction between the outer tube (1) and the force-applying sleeve (2) is reduced to the minimum, and the insertion part of the outer tube (1) increases. Then continue the insertion work. Step 3: When inserting, the force-applying sleeve (2) and the butterfly wing plate (20) push forward as the force-applying part. The outer tube (1) and the top of the one-way gripping protrusion (17) are subjected to force. This force drives the curved part of the top of the protrusion to approach the outer tube (1) and make contact. With the assistance of the contact friction part (19), the force is increased until the concave and convex friction part (18) sticks to the surface of the outer tube (1) to provide gripping ability. When the force-applying sleeve (2) is pushed forward, the outer tube (1) is pushed forward at the same time. The above low-friction sliding and gripping synchronous pushing process is repeated. Step 4: Repeat the above process until the conical part (8) is pushed into the patient's bladder. Under the pressure of the human body, the urine in the bladder enters the catheterization cavity through the connecting hole on the conical part (8) and flows out from the outlet (16). Connect the catheterization bag to the outlet (16), insert the syringe into the injection port (14), and inject a certain amount of physiological saline into the injection cavity. Since the wall thickness of the expansion balloon (13) is smaller than that of the outer tube (1), the hydraulic pressure is concentrated after injection, causing the expansion balloon (13) to expand and form a limiting balloon in the bladder to prevent the catheter from falling out. Step 5: Place the main fixing band (21) and the secondary fixing band (22) of the fixing patch (3) on the end of the outer tube (1), remove the release paper on the adhesive layer (25), and attach the structure including the fixing patch (3) to the patient's thigh. Then remove the release paper on the main fixing band (21) and the secondary fixing band (22) and attach them to the surface of the corresponding position of the outer tube (1). Then pull the force sleeve (2) to the end to prepare for the final fixation operation, so that the slot on the butterfly wing plate (20) engages with the traction card seat (23) to prepare for the outer tube (1) to be wrapped and fixed. Step 6: Connect the slot on the butterfly wing plate (20) to the traction seat (23), so that the main fixing strap (21) and the secondary fixing strap (22) are pulled by the traction seat (23) and tightened in opposite directions, thereby further wrapping and fixing the outer tube (1). The main fixing strap (21) and the secondary fixing strap (22) are sleeved on the end of the outer tube (1) and adhered to the surface, and the butterfly wing plate (20) is engaged with the traction seat (23) to complete the overall fixation of the urinary catheter.

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