Degradable urethral stent

Abstract

The utility model provides a degradable urethra stent which comprises a stent body and a stent inner tube, the stent body is sleeved on the outer circle face of the stent inner tube, a plurality of first sliding grooves are arranged on the inner circle face of the stent inner tube, a sliding ring is connected in the stent inner tube in a sliding mode, and a first connecting block is detachably connected on the inner circle face of the sliding ring. A plurality of first sliding rods are fixedly connected to the face, away from the push rod, of the sliding ring, and the first sliding rods are in sliding connection with the first sliding grooves. According to the scheme, the stent body and the stent inner tube are detachably connected, and the sliding ring for driving the first sliding rod and the first sliding groove to slide relatively is arranged in the stent inner tube in a sliding mode, so that capsule medicine in the urethra stent can be pushed to the side, away from the sliding ring, of the limiting block through the first sliding rod; therefore, the purposes of retaining the medicine capsule in the urethral stent for a long time and improving the treatment effect of the medicine are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a degradable urethral stent. Background Art

[0002] At present, the degradable urethral stent is a technical product used for urethral repair and treatment. It can gradually degrade after completing its function in the body. It does not require a secondary surgery to remove it, and can effectively reduce the patient's pain and medical expenses burden.

[0003] For example, a Chinese patent discloses "a urethral stent for use after hypospadias surgery" (patent number: CN110152169A), which includes an inner tube for inserting one end into the bladder of a child, a sleeve for being retained in the urethra of the child's penis after the inner tube is removed, and multiple connection points are provided between the inner tube and the sleeve. The above patent has the advantage of alleviating the pain of the child.

[0004] However, during the use of the above-mentioned urethral stent tube, it is inconvenient to use drugs in the urethral stent tube, especially capsule-type drugs are easy to leak out of the urethral stent tube, resulting in poor drug treatment effect. Therefore, a method is needed to retain the drug capsule in the urethral stent for a long time to improve the drug treatment effect. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a degradable urethral stent, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a degradable urethral stent, characterized in that it includes a stent body and a stent inner tube, the stent body is sleeved on the outer circular surface of the stent inner tube, a plurality of first sliding grooves are opened on the inner circular surface of the stent inner tube, a sliding ring is slidably connected inside the stent inner tube, a first connecting block is detachably connected on the inner circular surface of the sliding ring, a push rod is fixedly connected to the end of the first connecting block away from the stent body, a plurality of first sliding rods are fixedly connected to the surface of the sliding ring away from the push rod, the first sliding rod is slidably connected to the first sliding groove, and a plurality of limit blocks are fixedly connected to one end of the inner circular surface of the stent body.

[0009] Preferably, a second sliding groove is provided on both side walls of the first sliding groove, a second sliding rod is fixedly provided on both side surfaces of the first sliding rod, the second sliding rod is slidably connected to the second sliding groove, the thickness of the second sliding rod is smaller than that of the first sliding rod, and the first sliding rod is elastic.

[0010] Preferably, the first sliding groove is arranged obliquely to the axis center of the inner tube of the bracket, the second sliding groove is arranged obliquely to the axis center of the inner tube of the bracket, and the inclination angle between the second sliding groove and the axis center of the inner tube of the bracket is equal to the inclination angle between the first sliding groove and the axis center of the inner tube of the bracket.

[0011] Preferably, the plurality of first sliding grooves are provided with equal arcs on the inner circular surface of the inner tube of the support.

[0012] Preferably, the limit block is arranged obliquely to the axis of the inner tube of the bracket, the inclination direction of the limit block and the axis of the inner tube of the bracket is opposite to the inclination direction of the first sliding groove and the axis of the inner tube of the bracket, and the limit block is fixedly connected to the inner circular surface of the inner tube of the bracket with equal arc.

[0013] Preferably, the first openings are arranged at equal distances on the outer circumferential surface of the inner tube of the stent.

[0014] (III) Beneficial effects

[0015] The utility model provides a degradable urethral stent, which has the following beneficial effects:

[0016] 1. This scheme uses a detachably connected stent body and a stent inner tube, and a sliding ring is slidably arranged in the stent inner tube to drive the first sliding rod and the first sliding groove to slide relative to each other, so that the capsule medicine in the urethral stent can be pushed to the side of the limit block away from the sliding ring through the first sliding rod, thereby achieving the purpose of retaining the medicine capsule in the urethral stent for a long time and improving the drug treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 It is a right side structural schematic diagram of the inner tube of the stent of the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the structure of A.

[0021] In the figure: 11, bracket body; 12, first opening; 13, bracket inner tube; 14, sliding ring; 15, first connecting block; 16, push rod; 17, push rod base; 20, first sliding groove; 21, second sliding groove; 22, first sliding rod; 23, second sliding rod; 24, limit block. DETAILED DESCRIPTION

[0022] The utility model embodiment provides a degradable urethral stent, such as Figure 1-4 As shown, it includes a bracket body 11, a first opening 12, a bracket inner tube 13, a sliding ring 14, a first connecting block 15, a push rod 16, a push rod base 17, a first sliding groove 20, a second sliding groove 21, a first sliding rod 22, a second sliding rod 23, and a limit block 24.

[0023] like Figure 1-4 As shown, it includes a bracket body 11 and a bracket inner tube 13, the bracket body 11 is sleeved on the outer cylindrical surface of the bracket inner tube 13, the bracket body 11 and the bracket inner tube 13 are detachably connected by threads, a plurality of first sliding grooves 20 are opened on the inner cylindrical surface of the bracket inner tube 13, a sliding ring 14 is slidably connected inside the bracket inner tube 13, a first connecting block 15 is connected to the inner cylindrical surface of the sliding ring 14 by threads, an end of the first connecting block 15 away from the bracket body 11 is fixedly connected to a push rod 16, a surface of the sliding ring 14 away from the push rod 16 is fixedly connected to a plurality of first sliding rods 22, the first sliding rod 22 is slidably connected to the first sliding groove 20, a plurality of limit blocks 24 are fixedly connected to one end of the inner cylindrical surface of the bracket body 11, and first openings 12 are equidistantly opened on the outer cylindrical surface of the bracket body 11.

[0024] It is worth noting that the stent body 11 is made of biodegradable materials such as polylactic acid and glycolic acid.

[0025] Second sliding grooves 21 are provided on both side walls of the first sliding groove 20, and second sliding rods 23 are fixedly provided on both side surfaces of the first sliding rod 22. The second sliding rod 23 is slidably connected to the second sliding groove 21. The thickness of the second sliding rod 23 is less than that of the first sliding rod 22. The first sliding rod 22 is a metal strip with slight elasticity. Several first sliding grooves 20 with equal curvature are provided on the inner circular surface of the bracket inner tube 13.

[0026] The first sliding groove 20 is inclined to the axis of the bracket inner tube 13, the second sliding groove 21 is inclined to the axis of the bracket inner tube 13, the inclination angle between the second sliding groove 21 and the axis of the bracket inner tube 13 is equal to the inclination angle between the first sliding groove 20 and the axis of the bracket inner tube 13, the limit block 24 is inclined to the axis of the bracket inner tube 13, the inclination direction of the limit block 24 and the axis of the bracket inner tube 13 is opposite to the inclination direction of the first sliding groove 20 and the axis of the bracket inner tube 13, the limit block 24 is fixedly connected to the inner circular surface of the bracket inner tube 13 with equal arc, and the limit block 24 is made of elastic material.

[0027] When the present scheme is used to erect a urethral stent and administer drugs, first, the stent body 11 is implanted along the urethra, the drug capsule is placed at the end of the stent inner tube 13 away from the first connecting block 15, and is lifted up with the first sliding rod 22, and the first connecting block 15 is connected to the sliding ring 14 by threads.

[0028] Then, the inner tube 13 of the bracket is pushed into the bracket body 11, and the bracket body 11 is connected to the inner tube 13 of the bracket by threads, and the first connecting block 15 is pushed to slide into the inner tube 13 of the bracket by the push rod base 17 and the push rod 16. The first connecting block 15 drives the sliding ring 14 to slide into the inner tube 13 of the bracket, and the sliding ring 14 drives the first sliding rod 22 to slide relative to the first sliding groove 20, and the end of the first sliding rod 22 away from the sliding ring 14 pushes the medicine capsule to the limit block 24. Since the limit block 24 is elastic, the medicine capsule is pushed to the right side of the limit block 24.

[0029] Finally, the first connection block 15 is pulled to slide outside the bracket inner tube 13 by the push rod base 17 and the push rod 16, and the first connection block 15 and the sliding ring 14 are disassembled by threads.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A degradable urethral stent, characterized in that: The invention comprises a support body (11) and a support inner tube (13), wherein the support body (11) is sleeved on the outer circumferential surface of the support inner tube (13), and a plurality of first sliding grooves (20) are provided on the inner circumferential surface of the support inner tube (13). A sliding ring (14) is slidably connected inside the support inner tube (13), and a first connecting block (15) is detachably connected to the inner circumferential surface of the sliding ring (14). An end of the first connecting block (15) away from the support body (11) is fixedly connected to a push rod (16), and a surface of the sliding ring (14) away from the push rod (16) is fixedly connected to a plurality of first sliding rods (22), and the first sliding rods (22) are slidably connected to the first sliding grooves (20), and a plurality of limit blocks (24) are fixedly connected to one end of the inner circumferential surface of the support body (11).

2. A degradable urethral stent according to claim 1, characterized in that: Second sliding grooves (21) are provided on both side walls of the first sliding groove (20), second sliding rods (23) are fixedly provided on both side surfaces of the first sliding rod (22), the second sliding rod (23) is slidably connected to the second sliding grooves (21), the thickness of the second sliding rod (23) is smaller than the thickness of the first sliding rod (22), and the first sliding rod (22) is elastic.

3. A degradable urethral stent according to claim 2, characterized in that: The first sliding groove (20) is arranged to be inclined with respect to the axis center of the inner tube (13) of the support, and the second sliding groove (21) is arranged to be inclined with respect to the axis center of the inner tube (13) of the support, and the inclination angle between the second sliding groove (21) and the axis center of the inner tube (13) of the support is equal to the inclination angle between the first sliding groove (20) and the axis center of the inner tube (13) of the support.

4. The degradable urethral stent according to claim 2, characterized in that: The plurality of first sliding grooves (20) are arranged with equal arcs on the inner circular surface of the bracket inner tube (13).

5. The degradable urethral stent according to claim 3, characterized in that: The limit block (24) is arranged obliquely to the axis of the inner tube (13) of the support, and the inclination direction of the limit block (24) and the axis of the inner tube (13) of the support is opposite to the inclination direction of the first sliding groove (20) and the axis of the inner tube (13) of the support, and the limit block (24) is fixedly connected to the inner circular surface of the inner tube (13) of the support with equal arc.

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