Ureteral stent with irritation protection

Abstract

The utility model discloses a kind of ureteral stents with anti-irritation protection, related field is involved in ureteral stent, to solve the ureteral stent pigtail bladder end in prior art and produce touch irritation to bladder inner wall and produce urine feeling, patient can be uncomfortable because of the urine feeling produced by irritation.The one end of the stent pipe body is provided with first stent pipe, the other end of the stent pipe body is provided with second stent pipe, first stent pipe and second stent pipe are "pigtail" shape;The second stent pipe outside is provided with micro bubble capsule, the micro bubble capsule is composed of extension fixed part and micro bubble body, extension fixed part is fixed at the both ends of micro bubble body, two The extension fixed part is fixed at the both ends of second stent pipe outside, buffer cavity is formed in the micro bubble capsule, and the inner end surface of the micro bubble capsule is attached to the outer end surface of second stent pipe.

Description

Technical Field

[0001] This utility model relates to the field of ureteral stents, specifically a ureteral stent with anti-irritation protection. Background Technology

[0002] Ureteral stents, as medical devices, are primarily used to temporarily dilate and support the ureter to promote stone expulsion and relieve discomfort symptoms following ureteral obstruction or injury. Initially, ureteral stents were made of materials such as polyethylene; later, siloxanes and polyurethanes became the preferred materials due to their good biocompatibility and ability to reduce crusting. With advancements in medical technology, the design of ureteral stents has been continuously optimized, such as the development of single-J and double-J stents, and the emergence of new stents with anti-reflux properties and varying rigidity compositions, greatly enriching clinical treatment options. Ureteral stents are widely used in urology, especially in treating ureteral stones, inflammation, and strictures, by placing the stent in the affected area to restore urine flow and relieve pain.

[0003] Although ureteral stents play an important role in clinical treatment, as foreign bodies within the body, they inevitably cause some adverse reactions. After placement, the ureteral stent may rub against tissues such as the renal pelvis, ureter, and bladder mucosa. This friction can lead to mucosal damage and subsequently trigger a series of adverse reactions. Among these, bladder irritation symptoms are one of the most common, manifesting as lower abdominal and flank discomfort, urinary frequency, urgency, and dysuria. These symptoms not only cause significant suffering for patients but can also disrupt their daily lives and work.

[0004] Given the potential adverse reactions, particularly bladder irritation, that may occur after ureteral stent placement, developing a ureteral stent with anti-irritation protection is crucial. This stent needs to maintain its original function of dilating and supporting the ureter while reducing friction with internal tissues and minimizing irritation to the bladder and other tissues through improvements in materials and design. For example, the Chinese patent CN 214387791 U (A Ureteral Stent with Soft-Head Protection) includes a frame and an end assembly. Both ends of the frame are fitted with flexible tubes, and the ends of the tubes are fitted with soft heads… The soft head is made of relatively soft polyurethane with a hardness of approximately 74 degrees. This material is softer than the tube body material, conical in shape, and has a smooth head, avoiding the risk of mucosal damage caused by the tube head contacting the renal pelvis during surgical placement.

[0005] Although the aforementioned existing technology has the function of preventing damage to the inner wall, the pigtail bladder end of the ureteral stent touches and stimulates the inner wall of the bladder, causing a sensation of urination. Patients may experience discomfort due to the sensation of urination caused by the stimulation. Utility Model Content

[0006] The purpose of this invention is to provide a ureteral stent with anti-irritation protection to solve the problem mentioned in the background art where the pigtail bladder end of the ureteral stent touches and stimulates the inner wall of the bladder, causing urinary sensation and discomfort to the patient.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a ureteral stent with anti-irritation protection, comprising a stent tube body, a first stent tube at one end of the stent tube body, and a second stent tube at the other end of the stent tube body, the first stent tube and the second stent tube being shaped like a "pig's tail"; a microbubble sac is disposed outside the second stent tube, the microbubble sac being composed of an extension fixing part and a microbubble body, the extension fixing part being fixed to both ends of the microbubble body, two of the extension fixing parts being fixed to both ends of the second stent tube, a buffer cavity being formed inside the microbubble sac, and the inner end face of the microbubble sac being attached to the outer end face of the second stent tube.

[0008] Preferably, a first flexible head is fixed to the end of the first support tube, and a second flexible head is fixed to the end of the second support tube. A through hole with the same inner diameter as the first and second support tubes is opened through the first and second flexible heads.

[0009] Preferably, an outer fixing ball is fixed to one end of the support tube body near the second support tube, a one-way flow cavity is formed inside the outer fixing ball, an extension tube is fixed to one end of the support tube body inside the outer fixing ball, water guide holes are arranged in a ring array on the extension tube body, an outer sealing skirt is fixed to one end of the extension tube body near the second support tube, and a second flow channel is formed between the outer fixing ball and the outer sealing skirt.

[0010] Preferably, the outer sealing skirt is composed of a bent part, a swaying part, and a sealing part. The bent part, swaying part, and sealing part are arranged sequentially and integrally formed. The overall width of the bent part, swaying part, and sealing part is greater than the distance from the extension tube to the inner wall of the outer fixed ball.

[0011] Preferably, a liquid retention tank is formed between the extension tube and the bend and the swing section.

[0012] Preferably, a one-way valve is fixed inside the stent tube body on the side near the external fixation ball, and a first flow channel is formed inside the one-way valve.

[0013] Preferably, a liquid passage hole is provided through the end of the support tube body near the first support tube and the first support tube.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) In this utility model, through the microbubble design, the skin-feeling material is used to fit the bladder wall, which greatly reduces the contact stimulation of the pigtail end of the second stent tube to the bladder wall, making the patient feel more comfortable and reducing the discomfort caused by stent placement. It solves the problem that the pigtail end of the ureteral stent touches the inner wall of the bladder and causes urinary sensation, and the patient will feel uncomfortable due to the urinary sensation caused by the stimulation.

[0016] (2) In this utility model, the outer sealing skirt structure, combined with the liquid retention tank design, can respond quickly when urine refluxes. Through the folding and fitting of the skirt, it can effectively prevent urine reflux and protect the kidneys from damage caused by reflux.

[0017] (3) In this utility model, the design of the one-way valve and the flow channel ensures the smooth flow of urine in the forward direction, while providing double protection in the reflux, thereby improving the overall stability and reliability of the stent.

[0018] (4) In this utility model, the two ends of the stent are designed in the shape of pig tails, which makes it easy to accurately insert the stent under the direct vision of the ureteroscope and fix it in the renal pelvis and bladder after the guide wire is removed. This is used to fix the stent and prevent it from slipping towards the bladder and to prevent the stent from shifting towards the kidney, so as to ensure that urine flows smoothly into the bladder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a ureteral stent with anti-irritation protection according to the present invention;

[0020] Figure 2 This is a front view of a ureteral stent with anti-irritation protection according to the present invention;

[0021] Figure 3 This is a cross-sectional view of a ureteral stent with anti-irritation protection according to the present invention;

[0022] Figure 4 This is an enlarged view of section A of a ureteral stent with anti-irritation protection according to the present invention;

[0023] Figure 5 This is an enlarged view of section B of a ureteral stent with anti-irritation protection according to the present invention;

[0024] Figure 6 This is an enlarged view of the structure at point C of a ureteral stent with anti-irritation protection according to this utility model;

[0025] Figure 7 This is a cross-sectional view of a microbubble sac of a ureteral stent with anti-irritation protection according to the present invention.

[0026] In the diagram: 1. Stent tube body; 2. First stent tube; 3. Second stent tube; 4. First soft head; 5. Second soft head; 6. Fluid passage hole; 7. Microbubble sac; 8. Extension fixing part; 9. Microbubble body; 10. Buffer chamber; 11. External fixing ball; 12. One-way flow chamber; 13. One-way valve; 14. First flow channel; 15. Extension tube body; 16. Water guide hole; 17. External sealing skirt; 18. Second flow channel; 19. Bending part; 20. Swinging part; 21. Sealing part; 22. Liquid retention tank. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Please see Figures 1-7 This utility model provides an embodiment of a ureteral stent with anti-irritation protection, comprising a stent tube body 1, with a first stent tube 2 and a second stent tube 3 shaped like a "pig's tail" respectively at both ends of the stent tube body 1, so that the stent can be stably fixed in the renal pelvis and bladder to prevent displacement. A fluid passage hole 6 is provided through the stent tube body 1 near the end of the first stent tube 2 and on the first stent tube 2, allowing urine to pass more smoothly through the stent tube body 1 and the first stent tube 2.

[0029] Microvesicle anti-irritant design, such as Figures 1-3 , Figure 5 and Figure 7 As shown: A microbubble sac 7 is disposed on the outside of the second stent tube 3. The microbubble sac 7 consists of an extension fixing part 8 and a microbubble body 9. The extension fixing part 8 fixes both ends of the microbubble body 9 to the outside of the second stent tube 3. A buffer cavity 10 is formed inside the microbubble sac 7, and the inner end face is tightly attached to the outer end face of the second stent tube 3. This design prevents the end of the second stent tube 3 from directly contacting the bladder wall inside the bladder, reducing irritation and the feeling of urination. The microbubble sac 7 can be made of a skin-friendly material, that is, a softer and less noticeable material is selected from existing medical materials, further improving patient comfort.

[0030] Soft tip design, such as Figures 1-3 As shown: The first stent tube 2 and the second stent tube 3 are respectively fixed with a first soft head 4 and a second soft head 5, and a through hole with the same inner diameter as the stent tube is opened inside the soft head. This design further reduces the friction and irritation of the stent tip to the renal pelvis and bladder wall, enhances the flexibility and compliance of the stent, and effectively avoids damage to the surrounding area caused by the stent tip.

[0031] External fixed ball, such as Figures 1-3 , Figure 5 and Figure 6As shown: An outer fixing ball 11 is fixed to one end of the support tube body 1 near the second support tube 3, and a one-way flow cavity 12 is formed inside the outer fixing ball 11. The extension tube 15 extends from the inside of the outer fixing ball 11 along one end of the support tube body 1, and water guide holes 16 are arranged in a ring array on it.

[0032] External sealing skirt structure, such as Figure 5 and Figure 6 As shown: An outer sealing skirt 17 is fixed to one end of the extension tube 15 near the second support tube 3. A second flow channel 18 is formed between the outer fixing ball 11 and the outer sealing skirt 17, allowing urine to flow normally. At the same time, when urine refluxes, the outer sealing skirt 17 can fold and fit against the inner wall of the outer fixing ball 11, effectively preventing urine reflux and reducing the risk of infection caused by urine reflux.

[0033] The outer sealing skirt 17 is composed of a bent portion 19, a swaying portion 20, and a sealing portion 21, which are arranged sequentially and integrally formed. The overall width of the bent portion 19, the swaying portion 20, and the sealing portion 21 is greater than the distance from the extension tube 15 to the inner wall of the outer fixed ball 11. This design allows the outer sealing skirt 17 to fully fold and conform to the outer fixed ball 11 when urine refluxes, achieving effective reflux prevention. A liquid retention groove 22 is formed between the extension tube 15 and the bent portion 19 and the swaying portion 20; when urine refluxes, the liquid retention groove 22 can accumulate a certain amount of urine, causing the outer sealing skirt 17 to fold, thereby more effectively preventing urine reflux.

[0034] The setting of a one-way valve, such as Figure 5 and Figure 6 As shown: A one-way valve 13 is fixed inside the stent tube body 1 on the side near the external fixation ball 11. A first flow channel 14 is formed inside the one-way valve 13, and urine can only flow in one direction. In the initial stage of reflux, even if the external sealing skirt 17 is not folded in place, the one-way valve 13 can effectively prevent some urine from refluxing, thus improving the overall anti-reflux performance of the stent.

[0035] Working principle: A cystoscope or ureteroscope is inserted through the urethra to observe the bladder and ureteral openings. After confirming that there are no abnormalities, the ureter is inserted. Under direct visualization with the ureteroscope, a guidewire is inserted through the ureteral opening into the renal pelvis, ensuring that the guidewire is in the correct position. The ureteral stent is pushed along the guidewire. The first stent tube 2 is curled into the renal pelvis in a pigtail shape, and the second stent tube 3 is similarly curled into the bladder, ensuring that both ends are fixed to avoid displacement.

[0036] Once the ureteral stent is placed in the designated position, the pigtail-shaped end of the second stent tube 3 is protected by microbubbles 7, which will not cause contact stimulation to the bladder wall and thus prevent the patient from experiencing the urge to urinate. The microbubbles 7 are made of a skin-friendly material, which can provide the patient with a comfortable experience.

[0037] Urine in the renal pelvis normally passes through the first stent tube 2 and the stent tube body 1, then enters the second stent tube 3 through the first flow channel 14 and the second flow channel 18, and finally reaches the bladder. The outer sealing skirt 17 does not obstruct the flow of urine during normal flow. When there are signs of reflux, the flow of urine reaches the liquid retention tank 22, causing the outer sealing skirt 17 to fold. The bent part 19, the swinging part 20, and the sealing part 21 move towards the first stent tube 2. The sealing part 21 fits against the outer fixing ball 11 to prevent urine reflux. In the initial stage of reflux, when the outer sealing skirt 17 does not fold in place, the one-way valve 13 effectively prevents the initial reflux of some urine.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A ureteral stent with anti-irritation protection, comprising a stent tube body (1), characterized in that: One end of the stent tube body (1) is provided with a first stent tube (2), and the other end of the stent tube body (1) is provided with a second stent tube (3). The first stent tube (2) and the second stent tube (3) are shaped like a "pig's tail". The second stent tube (3) is provided with a microbubble sac (7) on the outside. The microbubble sac (7) is composed of an extension fixing part (8) and a microbubble body (9). The extension fixing part (8) is fixed to both ends of the microbubble body (9). The two extension fixing parts (8) are fixed to both ends of the second stent tube (3). A buffer cavity (10) is formed inside the microbubble sac (7). The inner end face of the microbubble sac (7) is attached to the outer end face of the second stent tube (3).

2. The ureteral stent with anti-irritation protection according to claim 1, characterized in that: The first support tube (2) is fixed with a first flexible head (4) at its end, and the second support tube (3) is fixed with a second flexible head (5) at its end. The first flexible head (4) and the second flexible head (5) are provided with through holes with the same inner diameter as the first support tube (2) and the second support tube (3).

3. The ureteral stent with anti-irritation protection according to claim 1, characterized in that: An outer fixing ball (11) is fixed at one end of the support tube body (1) near the second support tube (3). A one-way flow cavity (12) is formed inside the outer fixing ball (11). An extension tube (15) is fixed inside the outer fixing ball (11) along one end of the support tube body (1). Water guide holes (16) are arranged in a ring array on the extension tube (15). An outer sealing skirt (17) is fixed at one end of the extension tube (15) near the second support tube (3). A second flow channel (18) is formed between the outer fixing ball (11) and the outer sealing skirt (17).

4. A ureteral stent with anti-irritation protection according to claim 3, characterized in that: The outer sealing skirt (17) is composed of a bent part (19), a swing part (20) and a sealing part (21). The bent part (19), the swing part (20) and the sealing part (21) are arranged in sequence and integrally formed. The overall width of the bent part (19), the swing part (20) and the sealing part (21) is greater than the distance from the extension tube (15) to the inner wall of the outer fixed ball (11).

5. A ureteral stent with anti-irritation protection according to claim 4, characterized in that: A liquid retention tank (22) is formed between the extension tube (15), the bend (19), and the swing section (20).

6. A ureteral stent with anti-irritation protection according to claim 3, characterized in that: A one-way valve (13) is fixed inside the stent tube body (1) on the side near the external fixation ball (11), and a first flow channel (14) is formed inside the one-way valve (13).

7. A ureteral stent with anti-irritation protection according to claim 1, characterized in that: Liquid passage holes (6) are provided through the end of the support tube body (1) near the first support tube (2) and the first support tube (2).

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