Hydrogel ejaculation duct stent
The scaffold tube made of γ-polyglutamic acid hydrogel solves the problem of re-obstruction of the ejaculatory duct after surgery, and achieves stable support and infection prevention of the ejaculatory duct, with good tissue compatibility and antibacterial effect.
Patent Information
- Application Number
- CN202423169144.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-23
AI Technical Summary
After existing seminal vesiculoscopy, the ejaculatory ducts are prone to iatrogenic damage and inflammation, leading to re-obstruction, and lack effective support.
The stent tube, made of γ-polyglutamic acid hydrogel, is designed as a hollow cylinder with hydrophilic expansion and pH sensitivity. Combined with push rod and auxiliary rod structure, it ensures stable positioning of the stent tube in the ejaculatory duct, and reduces the risk of infection through antibacterial coating.
It effectively supports the ejaculatory duct, prevents re-obstruction, reduces mucosal irritation, has good tissue compatibility and antibacterial properties, and is easy to position and replace.
Smart Images
Figure CN223886979U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically a hydrogel ejaculatory duct stent. Background Technology
[0002] Ejaculatory duct obstruction is a major cause of seminal vesiculitis, hematospermia, and male infertility. Common causes of obstruction include stones or inflammation in the seminal vesicle, congenital atresia of the ejaculatory duct, and prostatic cysts. Clinical symptoms include reduced semen volume, persistent hematospermia, pain during ejaculation, or pain after ejaculation.
[0003] The most common treatment method now is seminal vesiculoscopy. However, after seminal vesiculoscopy, the ejaculatory duct often becomes obstructed again due to iatrogenic damage to the ejaculatory duct mucosa, lack of support at the distal end of the ejaculatory duct, and continuous inflammatory stimulation. Utility Model Content
[0004] The purpose of this invention is to provide a hydrogel ejaculatory duct support that provides stable support for the ejaculatory duct and prevents it from becoming obstructed again.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a hydrogel ejaculatory duct stent, including an insertion tube, two adjacent stent tubes are provided inside the insertion tube and at the head position, the stent tube adopts a hollow cylindrical design, and the stent tube is made of γ-polyglutamic acid hydrogel, a push rod is slidably provided inside the insertion tube, a gasket is fixedly provided at the head end of the push rod, and the tail end of the push rod is placed outside the insertion tube and threaded with an auxiliary rod.
[0006] A further feature of this invention is that the surface of the support tube is provided with an antibacterial coating.
[0007] A further feature of this invention is that the tail end of the insertion tube is provided with a cap, and the cap is connected to the tail end of the insertion tube by a fixing screw, and the middle part of the cap is provided with a through hole that slides with the push rod.
[0008] A further feature of this invention is that the inner wall of the insertion tube is provided with a groove, and the side of the gasket is fixed with a slider that slides in cooperation with the groove.
[0009] A further feature of this invention is that the tail end of the push rod is provided with a screw hole, and the end of the auxiliary rod near the push rod is fixedly provided with a screw that is threadedly engaged with the screw hole.
[0010] A further feature of this invention is that a handle is fixedly provided at the end of the auxiliary rod away from the push rod, and the handle is T-shaped.
[0011] A further feature of this invention is that a scale plate is fixedly provided on the surface of the auxiliary rod, and scale lines are provided on the surface of the scale plate.
[0012] In summary, the present invention has the following beneficial effects: The present invention uses a support tube made of special pH-sensitive hydrogel, which can absorb water and expand hydrophilically, while maintaining a certain shape and volume. At the same time, it has a corresponding chemical reaction with the pH of the environment, is not easy to fall off, and has good tissue compatibility. It does not irritate the mucous membrane tissue and can support the ejaculatory duct to prevent the ejaculatory duct from being obstructed again. Attached Figure Description
[0013] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;
[0014] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;
[0015] Figure 3 This is a schematic diagram of the exploded structure of this utility model;
[0016] Figure 4 This is a cross-sectional structural diagram of the insertion tube of this utility model.
[0017] In the diagram: 1. Insertion tube; 101. Slide groove; 102. End cap; 2. Support tube; 3. Push rod; 301. Washer; 302. Slider; 303. Screw hole; 4. Auxiliary rod; 401. Screw; 402. Scale plate; 403. Handle. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings of the embodiments thereof.
[0019] Please see Figures 1-4In this embodiment of the invention, a hydrogel ejaculatory duct support includes an insertion tube 1. Inside the insertion tube 1, at the head position, are two adjacent support tubes 2. The support tubes 2 are hollow cylinders designed to support the ejaculatory duct without interfering with the passage of semen. The support tubes 2 are made of γ-polyglutamic acid hydrogel, possessing both hydrophilic expansion and a certain shape and volume, and are sensitive to pH changes. This hydrogel material gradually increases its water absorption as the pH increases, and contains... A large number of easily hydrolyzed or protonated weakly acidic or weakly basic groups can capture or release protons according to changes in the pH value of the environment, causing the hydrogel to absorb water and swell or dehydrate and shrink. A push rod 3 is slidably provided inside the insertion tube 1. A gasket 301 is fixed at the head end of the push rod 3. When the push rod 3 moves, it can push the support tube 2 to move into the ejaculatory duct. The tail end of the push rod 3 is placed outside the insertion tube 1 and is threaded with an auxiliary rod 4. By controlling the movement of the auxiliary rod 4, the push rod 3 is moved, thereby pushing the support tube 2 into the ejaculatory duct.
[0020] In this embodiment, preferably, the surface of the stent tube 2 is provided with an antibacterial coating, which plays an antibacterial role and reduces the possibility of infection;
[0021] In this embodiment, preferably, the tail end of the insertion tube 1 is provided with a cap 102, which can limit the position of the push rod 3 and prevent the push rod 3 from falling off. The cap 102 is connected to the tail end of the insertion tube 1 by a fixing screw, which facilitates the quick assembly and disassembly of the cap 102. The middle part of the cap 102 is provided with a through hole that slides with the push rod 3, which guides the movement of the push rod 3.
[0022] In this embodiment, preferably, the inner wall of the insertion tube 1 is provided with a groove 101, and the side of the gasket 301 is fixed with a slider 302 that slides in cooperation with the groove 101. The sliding cooperation between the slider 302 and the groove 101 guides the movement of the gasket 301.
[0023] In this embodiment, preferably, the tail end of the push rod 3 is provided with a screw hole 303, and the end of the auxiliary rod 4 near the push rod 3 is fixedly provided with a screw 401 that is threadedly engaged with the screw hole 303. The engagement between the screw 401 and the screw hole 303 facilitates the disassembly of the auxiliary rod 4, which also facilitates the removal of the push rod 3 from the end cap 102 and makes it easier to clean each part.
[0024] In this embodiment, preferably, a handle 403 is fixedly provided at the end of the auxiliary rod 4 away from the push rod 3. The handle 403 is T-shaped and can be held by medical staff to facilitate the movement of the auxiliary rod 4.
[0025] In this embodiment, preferably, a scale plate 402 is fixedly provided on the surface of the auxiliary rod 4. The scale plate 402 is provided with scale lines. The scale lines on the scale plate 402 can be used to clearly determine the pushing depth of the push rod 3, so that the support tube 2 is pushed to the designated position, thereby improving the insertion accuracy of the support tube 2.
[0026] In use, the stent tube 2 is first placed continuously inside the head of the insertion tube 1. After seminal vesiculoscopic surgery, the insertion tube 1 is inserted through the seminal vesiculoscopic placement cavity. Under direct vision through the seminal vesiculoscopic field of view, the insertion tube 1 can be inserted into the ejaculatory duct. The medical staff holds the handle 403 and pushes the auxiliary rod 4 to move it, thereby driving the push rod 3 to push the stent tube 2 forward to insert the first stent tube 2 into the ejaculatory duct. Then, by adjusting the insertion tube 1 to insert into the other ejaculatory duct, the push rod 3 is pushed forward to insert the second stent tube 2 into the ejaculatory duct. The procedure is then performed by following the markings on the scale plate 402. The measurement line can clearly indicate the insertion depth of the push rod 3, allowing the stent tube 2 to be pushed to the designated position, thus improving the insertion accuracy of the stent tube 2. Since the stent tube 2 can absorb water and expand, it is not easy to fall off and has good tissue compatibility, without irritating the mucosal tissue. During the treatment period when the stent tube 2 needs to be supported, the patient is given oral medication to alkalize the urine and increase the pH to maintain the stability of the stent tube 2. When it is no longer necessary to maintain support, the medication can be stopped. After the urine naturally acidifies, the stent tube 2 shrinks on its own, making it easy to remove or even fall off on its own.
[0027] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.
Claims
1. A hydrogel ejaculatory duct stent, comprising an insertion tube (1), characterized in that, Inside the insertion tube (1) and at the head position, there are two adjacent support tubes (2). The support tubes (2) are hollow cylinders and are made of γ-polyglutamic acid hydrogel. Inside the insertion tube (1), there is a push rod (3) that slides. The head end of the push rod (3) is fixed with a gasket (301), and the tail end of the push rod (3) is placed outside the insertion tube (1) and threaded with an auxiliary rod (4).
2. The hydrogel ejaculatory duct stent according to claim 1, characterized in that: The surface of the support tube (2) is provided with an antibacterial coating.
3. The hydrogel ejaculatory duct stent according to claim 1, characterized in that: The insertion tube (1) has a cap (102) at its tail end, and the cap (102) is connected to the tail end of the insertion tube (1) by a fixing screw. The middle part of the cap (102) has a through hole that slides with the push rod (3).
4. The hydrogel ejaculatory duct stent according to claim 1, characterized in that: The inner wall of the insertion tube (1) is provided with a sliding groove (101), and the side of the gasket (301) is fixed with a slider (302) that slides in cooperation with the sliding groove (101).
5. The hydrogel ejaculatory duct stent according to claim 1, characterized in that: The push rod (3) has a screw hole (303) at its tail end, and the auxiliary rod (4) has a screw (401) that is threaded into the screw hole (303) at one end near the push rod (3).
6. The hydrogel ejaculatory duct stent according to claim 1, characterized in that: The auxiliary rod (4) is fixedly provided with a handle (403) at the end away from the push rod (3), and the handle (403) is T-shaped.
7. The hydrogel ejaculatory duct stent according to claim 1, characterized in that: The auxiliary rod (4) is fixedly provided with a scale plate (402), and the scale plate (402) is provided with scale lines.