Medical catheter with slow-release anesthetic anti-wear function

Abstract

The utility model relates to the field of medical apparatus and instruments, concretely relates to a medical catheter with slow -release anesthetic anti -wear function, include: tubular body, sheath, balloon, main connector, syringe connector, plugging structure, anesthetic adapter, anesthetic syringe. The utility model adopts the tubular body of ureter, nasogastric tube and the mode of sheath, can adopt the method for local anesthetic administration to reduce the great pain and harm of patient when placing catheter, retaining catheter, withdrawing catheter. The tubular body of sheath can be given to inject anesthetic, can also be given to inject anti -inflammatory drug, carries out treatment to the damaged urethra or nasal cavity, and does not need to pull out the catheter treatment. The sheath plays a role of forming a layer of physical separation between the catheter or nasogastric tube and the urethra or nasal cavity during the process of placing catheter and withdrawing catheter, avoids the discomfort and injury of urethra or nasal cavity caused by the friction of catheter or nasogastric tube in the sliding process, and is simple to operate, convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more specifically, to a medical catheter with sustained-release anesthesia and anti-wear function. Background Technology

[0002] Urinary catheters are important invasive medical materials widely used in clinical practice. They are mainly used to address urethral deformities caused by benign prostatic hyperplasia, urethral trauma, sexually transmitted diseases, etc., which prevent normal urination. They are also used for preparation before general anesthesia and spinal anesthesia, and for the resuscitation of critically ill patients. Because urethral size varies among patients, and the urethra is rich in nerve fibers, patients are highly sensitive to pain inside the urethra. Patients often experience significant pain during catheter insertion, which can lead to difficulty or failure due to strong contractions of the urethral sphincter and even urethral spasm.

[0003] Furthermore, forcibly inserting a urinary catheter can cause friction damage to the urethral surface, and may even lead to adhesions later on, increasing the patient's pain and causing great inconvenience to the patient's later recovery and daily life. In addition, after the ureter is installed, the patient's discomfort and pain are particularly obvious, and are often accompanied by symptoms of urinary frequency and urgency; moreover, walking with the indwelling catheter in place is also very painful due to the pulling of the catheter.

[0004] In addition, the friction between the catheter and the patient's urethral wall during catheter removal can cause intense pain. Furthermore, modern anesthetic catheters typically do not provide a fixed, repeated dose of anesthetic, and the catheter can still cause pain after the anesthesia wears off.

[0005] Enteral nutrition support refers to the use of a nasogastric tube inserted into the gastrointestinal tract through one nostril, mouth, or gastrointestinal stoma to ensure that patients can ingest sufficient protein, calories, and other nutrients. However, patients who use nasogastric tubes for a long time often experience varying degrees of damage to the nasal skin or mucous membranes, causing significant loss and suffering.

[0006] It is evident that patients suffer greatly during the period of intubation, whether it is a urinary catheter or a nasogastric tube, and the removal of the tube is an even more agonizing ordeal. Summary of the Invention

[0007] To address the aforementioned problems, the purpose of this invention is to provide a medical catheter with sustained-release anesthesia and anti-wear functions.

[0008] The objective of this utility model is achieved through the following technical solution: This utility model provides a medical catheter with sustained-release anesthesia and anti-wear function, comprising: a tube body, an outer sheath, a balloon, a main connector, a syringe connector, a sealing structure, an anesthetic connector, and an anesthesia syringe; The outer sheath has a sealing structure at the rear end. The tube body is fitted inside the outer sheath, with the front end extending out of the outer sheath and the rear end extending out of the outer sheath and sealing structure in sequence. Both the tube body and the outer sheath are flexible and supportive. The tube body has a drainage channel and a water injection channel. The drainage channel is the main cavity. The rear end of the tube body is connected to a main connector that communicates with the drainage channel and a syringe connector that communicates with the water injection channel. The front end of the tube body is closed. The front part of the tube body has several drainage holes and a balloon arranged sequentially from front to back. The balloon is a compliant balloon. The drainage channel communicates with several drainage holes forward, and the water injection channel communicates with the balloon forward. A spiral channel is provided between the outer sheath and the tube body. Several micropores communicating with the spiral channel are provided on the outer sheath. An anesthetic connector communicating with the spiral channel is provided on the sealing structure. The anesthetic connector is connected to the anesthetic syringe.

[0009] Furthermore, the sealing structure includes a base, a silicone gasket, and a spiral plug; the rear end of the outer sheath is connected to the base, the base has a groove, a silicone gasket is placed in the groove, and then the spiral plug is screwed in.

[0010] Furthermore, the base is a cylindrical hollow structure, and the outer part of the connection between the base and the outer sheath tube is an arc-shaped annular contraction. The base and the outer sheath tube are ultrasonically welded into one piece. The base has an annular groove inside to accommodate a silicone gasket. The outer diameter of the silicone gasket is similar to the inner diameter of the groove, and the inner diameter of the silicone gasket is similar to the outer diameter of the tube.

[0011] Furthermore, the inner wall of the groove inside the base is a spiral nut, and the spiral plug is a hollow structure; the middle section of the spiral plug is a screw that is screwed into the spiral nut of the base; the front end of the spiral plug is a cylindrical tube with an outer diameter that is equivalent to the outer diameter of the groove of the base and an inner diameter that is equivalent to the outer diameter of the tube, which enters the silicone gasket in the compression groove.

[0012] Furthermore, the rear end of the spiral plug is a handle, with an inner diameter similar to the outer diameter of the tube body, an outer diameter slightly larger than the outer diameter of the base, and knurling on it.

[0013] Furthermore, the medical catheter is a urinary catheter or a nasogastric tube.

[0014] Furthermore, the front end of the outer sheath is a smooth, tapered opening; several spiral reinforcing ribs are provided on the inner wall of the outer sheath from its end toward the sealing structure, connecting to the outer wall of the tube; several spiral channels are formed between the outer wall of the tube and the inner wall of the outer sheath.

[0015] Furthermore, the water injection channel is attached to the inner wall of the drainage channel, and the syringe connector is a one-way valve type connector.

[0016] Furthermore, the front end of the tube is a guide head, which is made of soft silicone. Starting from the guide head as the length starting point, several length marking lines are marked on the tube at preset distances from a preset position behind the balloon.

[0017] Furthermore, the anesthesia syringe has a transparent bottle made of PVC material; the bottle body has a parallel thread structure, with raised and recessed threads arranged in an orderly manner, and the bottle body has a certain degree of compressibility and elasticity; there is a Luer connector at the neck.

[0018] This invention relates to a medical catheter with sustained-release anesthesia and anti-wear properties. The catheter body of a ureter or nasogastric tube is combined with an outer sheath. During catheter insertion, indwelling, and removal, local anesthesia can be administered, significantly reducing patient pain and harm. The outer sheath, combined with the catheter body (or nasogastric tube body), allows for the administration of both anesthetic and anti-inflammatory drugs to treat damaged urethra (nasal cavity) without the need for tube removal. During insertion and removal, the outer sheath acts as a physical barrier between the catheter (or nasogastric tube) and the urethra (or nasal cavity), preventing discomfort and damage caused by friction during catheter movement. The procedure is simple, convenient, and practical. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is an overall structural diagram of the medical catheter with sustained-release anesthesia and anti-wear function of this utility model; Figure 2 This is a structural diagram of the tube body of the medical catheter with sustained-release anesthesia and anti-wear function of this utility model; Figure 3 This is a cross-sectional view of the front end of the tube body of the medical catheter with sustained-release anesthesia and anti-wear function of this utility model; Figure 4 This is an axial cross-sectional view of the medical catheter of this utility model with sustained-release anesthesia and anti-wear function; Figure 5 This is a cross-sectional view of the rear end portion of the medical catheter with sustained-release anesthesia and anti-wear function according to this utility model; Figure 6 This is a cross-sectional view of the anesthetic syringe in the medical catheter with sustained-release anesthesia and anti-wear function of this utility model; The attached diagram is labeled as follows: 1. Tube body; 2. Outer sheath; 3. Balloon; 4. Main connector; 5. Syringe connector; 6. Anesthetic connector; 7. Drainage channel; 8. Injection channel; 9. Drainage hole; 10. Spiral channel; 11. Micro-perforation hole; 12. Base; 13. Silicone gasket; 14. Spiral plug; 15. Groove; 16. Handle; 17. Smooth tightening port; 18. Spiral reinforcing rib; 19. Guide head; 20. Length marking line; 21. Luer connector; 22. Anesthetic syringe; 23. Injection channel outlet. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0021] like Figures 1 to 6 As shown, in order to overcome the shortcomings of the prior art, this utility model provides a urinary catheter and nasogastric tube with sustained-release anesthesia and anti-wear function.

[0022] Since urinary catheters and nasogastric tubes are based on the same research and development approach, the following will take urinary catheters as an example for detailed explanation.

[0023] The urinary catheter with sustained-release anesthesia and anti-wear function mainly consists of a tube body 1, an outer sheath 2, an injection device, a drainage hole 9 at the front end of the tube body 1, a balloon 3, and a connecting assembly at the rear end of the tube body 1. Among them, the outer sheath 2 is an important part of this utility model.

[0024] The tube body 1 is made of polytetrafluoroethylene (PTFE), providing a degree of flexibility and support. Its length is approximately 40-45cm (20-22cm for women). The diameter is 14-18Fr, and the wall thickness is 0.2-0.5mm. Tube body 1 is a dual-lumen tube, including a drainage channel 7 and a water injection channel 8. The drainage channel 7 is the main lumen, while the water injection channel 8 is attached to the inner wall of the drainage channel 7 and occupies a smaller portion. The front end of tube body 1 has an elliptical guide head 19, a balloon 3, and a drainage hole 9. The guide head 19 is made of soft silicone. The balloon 3 has a diameter of approximately 1.5-2cm and is a compliant balloon.

[0025] Between the balloon 3 and the guide head 19, there are several sets of drainage holes 9 symmetrically distributed on both sides of the tube wall. At the rear end of the tube body 1, there is a connecting assembly, including a main connector 4, which is connected to the drainage bag. Next to the main connector 4 is a syringe connector 5 that communicates with the water injection channel 8. The syringe connector 5 is a one-way valve type connector, and it connects to an external syringe. The water injection channel 8 extends along the tube body 1 to the central opening of the balloon 3, forming the water injection channel outlet 23.

[0026] On the surface of tube body 1, starting from the guide head at the front end of tube body 1, 10cm behind balloon 3, length markings 20 are marked in 5cm increments, extending to the connecting component at the rear end of tube body 1. Length markings 20 allow doctors to more intuitively determine the specific location of urethral obstruction and the depth of tube insertion.

[0027] The catheter includes an outer sheath 2 with a sealing structure at the tail end and an anesthetic connector 6. The length of the outer sheath 2 is measured from 3 cm posterior to the balloon 3 of the catheter to the connecting assembly at the tail end of the catheter. The outer sheath 2 is approximately 0.1 mm thick and can smoothly bend with the catheter. The front end of the outer sheath 2 has a smooth tightening port 17 with the same inner diameter as the outer diameter of the tube body 1, which ensures catheter movement while preventing medication leakage.

[0028] Four 1mm high, pyramidal spiral reinforcing ribs 18 are provided on the inner wall of the outer sheath 2, extending 10cm from its end towards the sealing structure, connecting to the outer wall of the tube body 1. The spiral reinforcing ribs 18 provide support for the outer sheath 2, maintaining a certain space between the outer sheath 2 and the tube body 1, forming four spiral channels 10 between the outer wall of the tube body 1 and the inner wall of the outer sheath 2. The spiral channels 10 allow the anesthetic to flow within the outer sheath 2 and can also retain the drug solution, achieving a slow release.

[0029] Numerous micro-perforations 11 are arranged along the spiral channel 10 on the wall of the outer sheath 2. The micro-perforations 11 allow the anesthetic to be evenly distributed on the inner wall of the urethra, achieving an anesthetic and analgesic effect. Antibacterial and anti-inflammatory drugs can also be injected into the outer sheath 2 to treat urethritis and other lesions caused by catheterization.

[0030] The tail end of the outer sheath 2 is a docking and sealing structure, including a docking structure for the anesthesia syringe 22 and a sealing structure. The sealing structure consists of three parts: a base 12, a silicone gasket 13, and a spiral plug 14. The base 12 of the sealing structure is a cylindrical hollow structure. The outer part of the base 12, which connects to the outer sheath 2, is an arc-shaped annular contraction. The inner hole is ultrasonically welded to the outer sheath 2.

[0031] The base 12 has an annular groove 15, 3-4 mm deep, to accommodate a silicone gasket 13. The outer diameter of the silicone gasket 13 is approximately the same as the inner diameter of the annular groove 15. The inner diameter of the silicone gasket 13 is approximately the same as the outer diameter of the tube 1, and its thickness is 4-5 mm. The annular groove 15 inside the base 12 extends outwards to form a spiral nut. The spiral plug 14 is a hollow structure that passes through the tube 1. The middle section of the spiral plug 14 is a screw that can be inserted into the spiral nut of the base 12 in the sealing structure, and the length of the screw is 2-3 mm longer than the length of the spiral nut. The front end of the spiral plug 14 has a cylindrical section 2-3 mm long, with an outer diameter approximately the same as the outer diameter of the annular groove 15 of the base 12 and an inner diameter approximately the same as the outer diameter of the tube 1, which can press against the silicone gasket 13 in the annular groove 15.

[0032] The rear end of the spiral stopper 14 is a handle 16, approximately 10mm in length. Its inner diameter is similar to the outer diameter of the tube body 1, while its outer diameter is slightly larger than the outer diameter of the base 12. The handle 16 is knurled to increase friction between the fingers and the handle. When the spiral stopper 14 is not pressing against the base 12, the tube body 1 can pass smoothly through the sealing structure. When the spiral stopper 14 presses against the base 12, the silicone gasket 13 expands under pressure. Fixed by the annular groove 15, the silicone gasket 13 can only expand and deform inwards, forming an annular compression on the tube body 1. This not only fixes the tube body 1 and prevents it from moving back and forth, but also seals the outer sheath 2 against the tube body 1. The docking structure with the anesthesia syringe 22 is a one-way valve structure with a Luer connector 21. The extension tube of the docking structure enters from the side of the cylindrical base 12 and exits through the inner wall of the outer sheath 2.

[0033] The anesthesia injector 22 is a transparent bottle, 50-60mm long and 30mm in diameter, made of PVC. The bottle body has a parallel threaded structure, with raised and recessed threads arranged in an orderly manner, giving the bottle a certain degree of compressibility. Squeezing the bottle upwards and downwards compresses the anesthetic inside. As the anesthetic is used up, the bottle body becomes smaller. The injection dosage is clearly judged, operation is convenient, and it is more portable. A Luer connector 21 is located at the neck, facilitating a stable and reliable connection with the anesthetic docking structure of the outer sheath 2. The anesthesia injector 22 can also be made using a syringe with a Luer connector 21. The anesthetic can be either anesthetic gel or anesthetic liquid.

[0034] The above design fundamentally solves the pain and inflammation caused by catheter damage to the urethral mucosa during catheterization, insertion, and removal. Patients or doctors can operate the catheter as needed to alleviate discomfort and can also administer medication to treat urethritis.

[0035] Nasogastric tubes are inserted into the gastrointestinal tract through a unilateral nasal cavity, oral cavity, or gastrointestinal stoma to provide artificial feeding, ensuring patients receive sufficient protein and calories. However, long-term use of nasogastric tubes often results in varying degrees of skin or mucous membrane damage in the nasal cavity, causing significant distress and suffering. A design approach using a slow-release anesthesia and abrasion-resistant catheter can be adopted. This involves adding an outer sheath (2) to the tube body (1), allowing for the intermittent injection of anesthetics or anti-inflammatory drugs to alleviate nasal mucosal injuries and nasal ulcers caused by insertion. However, the outer sheath (2) of a nasogastric tube is relatively shorter than that of a urinary catheter, and the micro-exudate hole (11) is also shorter, as the nasogastric tube only requires special protection at the insertion site within the nasal cavity.

[0036] During nasogastric tube insertion, the outer sheath 2 can be inserted into the nasal cavity first, and then the tube body 1 of the nasogastric tube can be inserted through the outer sheath 2. This effectively avoids discomfort and pain caused by friction of the nasal mucosa during insertion. Similarly, during nasogastric tube removal, the tube body 1 can be withdrawn from the outer sheath 2 first, and then the outer sheath 2 can be pulled out last, greatly reducing the patient's pain.

[0037] The method of using this utility model is as follows: 1. When inserting the urinary catheter, place the tip of the outer sheath 2 behind the urinary catheter guide head 19.

[0038] 2. Apply lubricant to the entire outer sheath 2.

[0039] 3. Inject a certain amount of anesthetic into the urethra.

[0040] 4. Slowly insert the outer sheath 2 and the body 1 of the catheter into the urethra until they reach the bladder.

[0041] 5. Hold the connecting structure at the end of the outer sheath 2 with one hand, and push the catheter body 1 forward with the other hand until the balloon 3 of the catheter is pushed out of the outer sheath 2.

[0042] 6. Use a syringe to inject 10-15 ml of water into the balloon 3 through the water injection channel 8 of the catheter.

[0043] 7. Secure the catheter in place.

[0044] 8. When the patient feels unwell, connect the anesthetic connector 6 to the anesthetic syringe 22 and inject the anesthetic.

[0045] 9. When inserting a nasogastric tube, the outer sheath 2 can be inserted into the nasal cavity first, and then the tube body 1 of the nasogastric tube can be slowly inserted through the outer sheath 2.

[0046] 10. When removing the nasogastric tube, first remove the tube body 1, and finally remove the outer sheath 2, which can greatly reduce the patient's pain.

[0047] The beneficial effects of this utility model are as follows: 1. The combination of the ureteral tube body 1 and the outer sheath tube 2 allows for the administration of local anesthesia during tube placement, indwelling, and removal, greatly reducing the patient's pain and harm.

[0048] 2. The outer sheath 2 uses a spiral reinforcing rib 18, which not only supports the thin wall of the outer sheath 2, but also forms a drug retention space between the inner wall of the outer sheath 2 and the outer wall of the catheter body 1 (the outer wall of the nasogastric tube body 1), which has a good sustained-release effect for urethral (nasal) medication.

[0049] 3. During catheter insertion and removal, the outer sheath 2 serves to form a physical barrier between the urinary catheter (nasogastric tube) and the urethra (nasal cavity), avoiding discomfort and damage caused by friction of the urinary catheter (nasogastric tube) to the urethra (nasal cavity) during the sliding process.

[0050] 4. The microperforation structure 11 on the wall of the outer sheath tube 2 can slowly administer drugs to the urethra (nasal cavity), and the microperforation 11 will not damage the inner wall of the urethra or the nasal mucosa.

[0051] 5. The outer sheath 2 is combined with the tube body 1 of the urinary catheter (the tube body 1 of the nasogastric tube), which can administer both anesthetic and anti-inflammatory drugs to treat the damaged urethra (nasal cavity) without removing the tube.

[0052] 6. The sealing structure of the outer sheath 2 uses a compressed silicone gasket 13, which expands inward and presses tightly around the outer wall of the catheter (nasogastric tube), solving the leakage problem. At the same time, it also compresses and fixes the tube body 1 of the catheter (the tube body 1 of the nasogastric tube). Moreover, fixing and releasing are quick and simple.

[0053] 7. The anesthetic syringe 22 adopts a threaded structure, with raised and recessed threads arranged in an orderly manner, giving the bottle a certain degree of compressibility and elasticity. Squeezing the bottle upwards and downwards squeezes out the anesthetic inside. As less anesthetic is used, the bottle becomes smaller, allowing for clear determination of the injection dosage, convenient operation, and greater portability.

[0054] 8. The anesthetic docking structure is a one-way valve type with a Luer connector 21. The connection is secure and will not come loose due to excessive pressure or other external forces. It can also be used with syringes equipped with Luer connectors 21.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A medical catheter with sustained-release anesthesia and anti-abrasion function, characterized in that, include: Tube body, outer sheath, balloon, main connector, syringe connector, sealing structure, anesthetic connector, anesthetic syringe; The outer sheath is connected to the sealing structure at its rear end. The tube body is fitted inside the outer sheath, with its front end extending out of the outer sheath and its rear end extending out of the outer sheath and sealing structure in sequence. Both the tube body and the outer sheath are flexible and supportive. The tube body is provided with a drainage channel and a water injection channel. The drainage channel is the main cavity. The rear end of the tube body is connected to the main connector communicating with the drainage channel and the syringe connector communicating with the water injection channel. The front end of the tube body is provided with a silicone guide head, several drainage holes, and the balloon in sequence from front to back. The balloon is a compliant balloon. The drainage channel communicates forward with several drainage holes, and the water injection channel communicates forward with the balloon. A spiral channel is provided between the outer sheath and the tube body. The outer sheath is provided with a plurality of micropores communicating with the spiral channel. The sealing structure is provided with an anesthetic connector communicating with the spiral channel. The anesthetic connector is connected to the anesthetic syringe.

2. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 1, characterized in that, The sealing structure includes a base, a silicone gasket, and a spiral plug; the rear end of the outer sheath is connected to the base, the base is provided with a groove, the silicone gasket is placed in the groove and then the spiral plug is screwed in.

3. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 2, characterized in that, The base is a cylindrical hollow structure. The outer part of the base connected to the outer sheath tube has an arc-shaped annular contraction. The base and the outer sheath tube are ultrasonically welded into one piece. The base has an annular groove inside to accommodate the silicone gasket. The outer diameter of the silicone gasket is equivalent to the inner diameter of the groove, and the inner diameter of the silicone gasket is equivalent to the outer diameter of the tube.

4. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 2, characterized in that, The inner wall of the groove inside the base is a spiral nut, and the spiral plug is a hollow structure; the middle section of the spiral plug is a screw that is screwed into the spiral nut of the base; the front end of the spiral plug is a cylindrical tube with an outer diameter that is equivalent to the outer diameter of the groove of the base and an inner diameter that is equivalent to the outer diameter of the tube, which enters to compress the silicone gasket in the groove.

5. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 2, characterized in that, The rear end of the spiral plug is a handle, the inner diameter of which is similar to the outer diameter of the tube, and the outer diameter is slightly larger than the outer diameter of the base, and it is provided with knurling.

6. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 1, characterized in that, The medical catheter is a urinary catheter or a nasogastric tube.

7. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 1, characterized in that, The front end of the outer sheath is a smooth, tapered opening; several spiral reinforcing ribs are provided on the inner wall of the outer sheath from its end toward the sealing structure, connecting to the outer wall of the tube; several spiral channels are formed between the outer wall of the tube and the inner wall of the outer sheath.

8. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 1, characterized in that, The water injection channel is attached to the inner wall of the drainage channel, and the syringe connector is a one-way valve connector.

9. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 1, characterized in that, The front end of the tube is a guide head, which is made of soft silicone. The tube is marked with several length marking lines starting from the guide head and from a preset position behind the balloon, with a preset distance as the unit of measurement.

10. The medical catheter with sustained-release anesthesia and anti-wear function according to claim 1, characterized in that, The anesthesia injector has a transparent bottle made of PVC material; the bottle body has a parallel thread structure, with raised and recessed threads arranged in an orderly manner, and the bottle body has compressible elasticity; there is a Luer connector at the neck.

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