Sterile ureter support not prone to being blocked
By designing an adjustable length ureteral stent, combined with the technology of limiting pin shell and water-absorbing sponge, the existing ureteral stent is solved, and the flexibility and blockage prevention effect of the stent is achieved.
Patent Information
- Application Number
- CN202510243073.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-05-27
AI Technical Summary
The fixing specifications of existing ureteral stents are difficult to adapt to individual differences in ureter lengths between different patients, resulting in excessively long stents that may cause bleeding or damage the bladder wall and are prone to clogging.
A sterile ureteral stent that is not easily clogged is designed, including the first section, the second section and the intermediate section, the longitudinal length of the intermediate section is adjusted by a guide wire, and the connection strength and drug release efficiency are improved through the limit pin shell and the water absorbing sponge.
Flexible adjustment and strengthening of the ureteral stent are achieved, avoiding blockage and tissue damage, and maintaining local pH through sustained-release drugs to promote uric acid dissolution.
Smart Images
Figure CN120037565A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of medical devices, and particularly to a sterile ureteral stent that is not easily blocked. Background Art
[0002] A ureteral stent is a tubular medical device used to maintain the smooth flow of urine from the kidney to the bladder, and its two ends are designed in a J shape to be fixed to the renal pelvis and the bladder respectively. Research shows that the indwelling length of the ureteral stent is closely related to urinary irritation symptoms. Currently, the length of conventional ureteral stents on the market is mostly 30 cm, and the longitudinal models are divided at intervals of 2 cm. For patients, an overly long stent is likely to cause an increase in the curling diameter in the bladder, and the J-shaped end may cause bleeding or damage due to friction against the bladder wall. Therefore, this fixed specification is difficult to adapt to the individual differences in the ureteral length among different patients.
[0003] Therefore, it is necessary to provide a new sterile ureteral stent that is not easily blocked to solve the above technical problems. Summary of the Invention
[0004] To solve the above technical problems, the present invention provides a sterile ureteral stent that is not easily blocked, which solves the problem that a ureteral stent with a fixed specification is difficult to adapt to the individual differences in the ureteral length among different patients.
[0005] The sterile ureteral stent that is not easily blocked provided by the present invention includes a first section and a second section. The ends of the first section and the second section are both set in a J shape. A first engagement ring is fixed on the first section, and a first card slot is opened on one side of the first engagement ring. A ring-shaped first card block is fixed on the second section. An intermediate section is provided between the first section and the second section. A second engagement ring is fixed at one end of the intermediate section, and a second card slot is opened on one side of the second engagement ring. A ring-shaped second card block is fixed at the other end of the intermediate section.
[0006] In a preferred embodiment, the second card slot is fitted with the first card block, and the first card slot is fitted with the second card block. The longitudinal length of the intermediate section is 0.5 cm to 1 cm.
[0007] In a preferred embodiment, the first section, the second section, and the intermediate section are all set in a spiral shape.
[0008] In a preferred embodiment, the diameters of the first engagement ring and the second engagement ring are the same as that of the first section.
[0009] In a preferred embodiment, through holes are opened on the first engagement ring, the second engagement ring, the first card block, and the second card block. A limiting pin housing is arranged between the first engaging ring and the first clamping block, and the limiting pin housing is located inside the through hole.
[0010] In a preferred embodiment, a drug accommodation cavity is arranged at the center inside the limiting pin housing, and a water-absorbing sponge is arranged at the inner edge of the limiting pin housing.
[0011] In a preferred embodiment, a plurality of water absorption holes are formed on both sides of the limiting pin housing, and medicine outlets are formed at both ends of the limiting pin housing.
[0012] In a preferred embodiment, the mutually remote ends of the first section and the second section are both arranged in a semicircular shape, and wire access holes are formed at the ends of the first section and the second section.
[0013] In a preferred embodiment, a horn-shaped impurity discharge plate is fixed at the middle section.
[0014] In a preferred embodiment, the edge of the impurity discharge plate is rounded, and the impurity discharge plate is made of hydrophilic soft-coated silica gel.
[0015] Advantages of the present invention: 1. When in use between the ureters of the present invention, after the guide wire enters the ureter, according to the length of the guide wire entering, the doctor's assistant can adjust the longitudinal length of the middle section in real time. In actual use, the doctor's assistant only needs to snap the first clamping block of the middle section into the second card slot, snap the second clamping block into the first card slot, and then insert the limiting pin housing into the through hole to complete the assembly work of the entire ureteral stent. The operation is simple, convenient and the combination is fast; 2. The second clamping block of the middle section can also be inserted into the second card slot to complete the combined connection between two middle sections, further improving the flexibility of use of the present ureteral stent; 3. By arranging the limiting pin housing, the connection strength of the first section, the second section and the middle section can be increased. At the same time, when urine enters the water absorption holes, the water-absorbing sponge will absorb water and expand, further expanding the limiting pin housing, further improving its connection strength. And after the water-absorbing sponge absorbs water, it will squeeze the sodium citrate solution (diluted) gel inside the drug accommodation cavity, accelerating its release speed from the medicine outlet, injecting the sodium citrate solution into the ureter, maintaining the local pH>6.5 through slow release, promoting the dissolution of uric acid, and avoiding ureteral blockage. Description of the drawings
[0016] Figure 1 is a three-dimensional view of the overall structure of the non-clogging sterile ureteral stent provided by the present invention; Figure 2 is Figure 1 an enlarged structural view of A shown; Figure 3 is Figure 1 the enlarged structural schematic diagram of B shown in Figure 4 the structural view of the middle section provided by the present invention Figure 1 ; Figure 5 the structural view of the middle section provided by the present invention Figure 2 ; Figure 6 the structural view of the guide wire access hole provided by the present invention
[0017] Reference numerals in the figure: 1, the first section; 2, the second section; 3, the first engagement ring; 4, the first card slot; 5, the first card block; 6, the middle section; 7, the second engagement ring; 8, the second card slot; 9, the second card block; 10, the through hole; 11, the limit pin housing; 12, the drug accommodation cavity; 13, the water-absorbing sponge; 14, the water absorption hole; 15, the medicine outlet; 16, the guide wire access hole; 17, the impurity discharge plate Specific embodiments
[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments
[0019] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , where Figure 1 is the overall structural perspective view of the non-clogging sterile ureteral stent provided by the present invention Figure 2 is Figure 1 the enlarged structural schematic diagram of A shown in Figure 3 is Figure 1 the enlarged structural schematic diagram of B shown in Figure 4 the structural view of the middle section provided by the present invention Figure 1 ; Figure 5 the structural view of the middle section provided by the present invention Figure 2 ; Figure 6 the structural view of the guide wire access hole provided by the present invention
[0020] In the specific implementation process, as Figure 1 - Figure 6As shown, it includes a first section 1 and a second section 2. The ends of the first section 1 and the second section 2 that are away from each other are both set to be semi-circular, and wire access holes 16 are provided at the ends of the first section 1 and the second section 2. The ends of the first section 1 and the second section 2 are both set to be J-shaped. A first engagement ring 3 is fixed on the first section 1, and a first card slot 4 is provided on one side of the first engagement ring 3. A ring-shaped first card block 5 is fixed on the second section 2. An intermediate section 6 is provided between the first section 1 and the second section 2. One end of the intermediate section 6 is fixed with a second engagement ring 7, and a second card slot 8 is provided on one side of the second engagement ring 7. The other end of the intermediate section 6 is fixed with a ring-shaped second card block 9. The second card slot 8 is engaged with the first card block 5, and the first card slot 4 is engaged with the second card block 9. The longitudinal length of the intermediate section 6 is 0.5 cm to 1 cm. When this ureteral stent is in use, after the guide wire enters the ureter, according to the length of the guide wire entering, the doctor's assistant can adjust the longitudinal length of the intermediate section 6 in real time. In actual use, the doctor's assistant inserts the first card block 5 of the intermediate section 6 into the first card slot 4, inserts the second card block 9 into the second card slot 8, and then inserts the limit pin shell 11 into the through hole 10 to complete the assembly work of the entire ureteral stent. The operation is simple and convenient and the combination is fast. Moreover, the part of the limit pin shell 11 located inside the intermediate section 6 still has a certain distance from the inner wall of the intermediate section 6, so it does not affect the normal insertion of the guide wire.
[0021] The diameters of the first engagement ring 3 and the second engagement ring 7 are both the same as that of the first section 1. The first section 1, the second section 2, and the intermediate section 6 are all set to be spiral. The spiral corrugated metal stent can adapt to the natural curvature of the ureter (such as the pelviureteric junction) and the physiological tortuosity of the (pelvic ureter) through deformation such as compression or stretching. This design enables the stent to not only fit the ureteral course but also provide continuous support after restoring its shape, avoiding tissue compression or displacement caused by a rigid structure.
[0022] Through holes 10 are provided on the first engagement ring 3, the second engagement ring 7, the first card block 5, and the second card block 9. A limit pin shell 11 is provided between the first engagement ring 3 and the first card block 5. The limit pin shell 11 is located inside the through hole 10. It is characterized in that a drug accommodation cavity 12 is provided at the center inside the limit pin shell 11. Sodium citrate solution hydrogel or other drugs such as anti-inflammatory agents can be placed inside the drug accommodation cavity 12 to promote uric acid decomposition or tissue repair. The gel material used needs to be non-toxic and biodegradable and gradually decompose in the ureter, such as gelatin and chitosan-based materials.
[0023] A water-absorbing sponge 13 is provided at the inner edge of the limit pin shell 11. A number of water-absorbing holes 14 are provided on both sides of the limit pin shell 11, and medicine outlets 15 are provided at both ends of the limit pin shell 11.
[0024] A horn-shaped impurity removal plate 17 is fixed at the middle section 6. The edges of the impurity removal plate 17 are rounded, and the impurity removal plate 17 is made of hydrophilic soft-coated silica gel. When the ureteral stent medicine is taken out, the horn-shaped impurity removal plate 17 can take out a small amount of uric acid stones located inside the ureter.
[0025] The working principle of the present invention: When this ureteral stent is in use, after the guide wire enters the inside of the ureter, according to the length of the guide wire entering, the doctor's assistant can adjust the longitudinal length of the middle section 6 in real time. In actual use, the doctor's assistant inserts the first clamping block 5 of the middle section 6 into the second clamping groove 8, inserts the second clamping block 9 into the first clamping groove 4, and then inserts the limit pin housing 11 into the through hole 10 to complete the assembly work of the entire ureteral stent. The operation is simple and convenient and the combination is fast; The second clamping block 9 of this middle section 6 can also be inserted into the second clamping groove 8 to complete the combined connection between two middle sections 6, further improving the flexibility of use of this ureteral stent; By setting the limit pin housing 11, the connection strength of the first section 1, the second section 2 and the middle section 6 can be increased. At the same time, when urine enters the water absorption holes 14, the water absorption sponge will absorb water and expand 13, further expanding the limit pin housing 11, further improving its connection strength. And after the water absorption sponge absorbs water, it will squeeze the sodium citrate solution gel inside the medicine containing cavity 12, accelerating its release speed from the medicine outlet, injecting the sodium citrate solution into the ureter, maintaining the local pH>6.5 through slow release, promoting the dissolution of uric acid, and avoiding the blockage of the ureter.
[0026] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.
Claims
1. A sterile ureteral stent that is not prone to blockage, comprising a first section (1) and a second section (2), characterized in that: The ends of the first section (1) and the second section (2) are both arranged in a J shape, a first engaging ring (3) is fixed on the first section (1), a first clamping groove (4) is provided on one side of the first engaging ring (3), and a first annular clamping block (5) is fixed on the second section (2); An intermediate section (6) is provided between the first section (1) and the second section (2); a second engaging ring (7) is fixed to one end of the intermediate section (6); a second clamping groove (8) is provided on one side of the second engaging ring (7); and an annular second clamping block (9) is fixed to the other end of the intermediate section (6).
2. The non-clogging sterile ureteral stent according to claim 1, characterized in that: The second card slot (8) is engaged with the first card block (5), and the first card slot (4) is engaged with the second card block (9); The middle section (6) has a longitudinal length of 0.5 cm to 1 cm.
3. The non-clogging sterile ureteral stent according to claim 2, characterized in that: The first section (1), the second section (2) and the middle section (6) are all arranged in a spiral shape.
4. The non-clogging sterile ureteral stent according to claim 3, characterized in that: The diameters of the first engaging ring (3) and the second engaging ring (7) are the same as those of the first section (1).
5. The non-clogging sterile ureteral stent according to claim 4, characterized in that: The first engaging ring (3), the second engaging ring (7), the first clamping block (5) and the second clamping block (9) are all provided with through holes (10); A limit pin housing (11) is provided between the first engaging ring (3) and the first clamping block (5), and the limit pin housing (11) is located inside the through hole (10).
6. The non-clogging sterile ureteral stent according to claim 5, characterized in that: A medicine containing cavity (12) is provided at the center of the limiting pin shell (11), and a water-absorbing sponge (13) is provided at the inner edge of the limiting pin shell (11).
7. The non-clogging sterile ureteral stent according to claim 6, characterized in that: A plurality of water absorption holes (14) are provided on both sides of the limiting pin shell (11), and medicine outlets (15) are provided at both ends of the limiting pin shell (11).
8. The non-clogging sterile ureteral stent according to claim 7, characterized in that: The ends of the first section (1) and the second section (2) that are away from each other are both arranged in a semicircular shape, and the ends of the first section (1) and the second section (2) are both provided with guide wire entry and exit holes (16).
9. The non-clogging sterile ureteral stent according to claim 8, characterized in that: A trumpet-shaped debris removal plate (17) is fixed to the middle section (6).
10. The non-clogging sterile ureteral stent according to claim 9, characterized in that: The edges of the debris removal plate (17) are rounded, and the debris removal plate (17) is made of hydrophilic soft-coated silica gel.