Intelligent slow-release drug delivery structure of kidney intravascular stent

Abstract

The utility model relates to the technical field of medical equipment, in particular to an intelligent slow-release drug delivery structure of a kidney intravascular stent, which comprises a stent, a drug delivery channel arranged in the stent and a sleeve arranged in the stent, two sides of the sleeve are fixedly communicated with the drug delivery channel, a plurality of drug delivery holes are uniformly arranged on the outer side of the drug delivery channel, and a threaded hole is arranged at one end of the sleeve. A threaded column is in threaded connection with the interior of the threaded hole, a piston rod is slidably arranged on the side, away from the threaded hole, in the sleeve, a sealing block is fixedly arranged at the end, close to the threaded hole, of the piston rod, a pushing mechanism is arranged on the rod wall of the piston rod, and a locking mechanism is arranged at the end, away from the threaded hole, of the piston rod; the fixing rods are slidably arranged in the strip-shaped holes, the two ends of the fixing rods are fixedly connected with the inner side walls of the sleeves, and springs are fixedly arranged on the rod walls of the sides, close to the threaded holes, of the fixing rods. The intravascular stent can automatically carry out sustained-release administration, is high in uniformity and good in administration effect, and improves the reliability of the intravascular stent.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely is a kind of kidney blood vessel stent intelligent slow-release drug delivery structure. BACKGROUND

[0002] Kidney blood vessel stent is a kind of medical equipment for treating renal artery stenosis. The main causes of renal artery stenosis include renal atherosclerotic stenosis (ARAS), multiple arteritis (TA) and fibromuscular dysplasia (FMD). Renal artery angioplasty is a method of using balloon pressure expansion through femoral brachioradial artery puncture to relieve renal artery stenosis, improve and restore normal renal blood perfusion, and achieve the purpose of treating renal vascular hypertension. Blood vessel stent is divided into metal tantalum, medical stainless steel and nickel-titanium alloy according to material.

[0003] After placing the blood vessel stent, restenosis may occur in the blood vessel, i.e. the blood vessel inside or near the stent becomes narrow again. This situation is not uncommon after renal artery stent implantation. Drug delivery, especially the administration of antiplatelet drugs and anticoagulants, can help prevent thrombosis and reduce the risk of restenosis.

[0004] In the prior art, the blood vessel stent usually directly applies the liquid medicine to the surface of the stent. However, the liquid medicine on the surface of the stent may be wiped off on the way after the stent enters the blood vessel, resulting in poor application effect of the liquid medicine on the blood vessel stent at the specified position and low uniformity of the liquid medicine application, and thus the reliability of the blood vessel stent is insufficient. Therefore, we propose a kidney blood vessel stent intelligent slow-release drug delivery structure. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kidney blood vessel stent intelligent slow-release drug delivery structure, which can automatically slow-release drug delivery, has high uniformity, good drug delivery effect and improved reliability of the blood vessel stent, to solve the problems in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.

[0007] A kidney blood vessel stent intelligent slow-release drug delivery structure includes a stent, a drug delivery channel is arranged inside the stent, a sleeve is arranged inside the stent, the sleeve is fixedly communicated with the drug delivery channel at both sides, a plurality of drug delivery holes are uniformly arranged outside the drug delivery channel, a threaded hole is arranged at one end of the sleeve, a threaded column is screw-connected in the threaded hole, a piston rod is slidingly arranged in the sleeve away from the threaded hole at one side, a sealing block is fixedly arranged at the end of the piston rod close to the threaded hole, a pushing mechanism is arranged on the wall of the piston rod, and a locking mechanism is arranged at the end of the piston rod away from the threaded hole.

[0008] Further, the pushing mechanism comprises a fixed rod, a rod wall of the piston rod is provided with a strip-shaped hole, the fixed rod is slidingly arranged in the strip-shaped hole, and two ends of the fixed rod are fixedly connected with the inner side wall of the sleeve.

[0009] Further, the locking mechanism comprises an L-shaped rod, a slide hole is arranged on the lower side wall of the sleeve away from the threaded hole, a vertical part of the L-shaped rod is slidingly arranged in the slide hole, a rectangular groove matched with a horizontal part of the L-shaped rod is arranged on the end of the piston rod away from the threaded hole, the horizontal part of the L-shaped rod extends to the inside of the rectangular groove, a locking block is fixedly arranged on the lower side of the horizontal part of the L-shaped rod, and a locking groove matched with the locking block is arranged on the lower side of the rectangular groove.

[0010] Further, a push plate is fixedly arranged on the lower end of the vertical part of the L-shaped rod.

[0011] Further, the spring is always in a compressed state.

[0012] Further, an anti-skid wheel is fixedly arranged on the end of the threaded column away from the piston rod.

[0013] Further, a pull rod is fixedly arranged on the end of the piston rod away from the threaded hole.

[0014] Compared with the prior art, the kidney vascular stent intelligent sustained-release drug delivery structure has the following beneficial effects:

[0015] The kidney vascular stent intelligent sustained-release drug delivery structure has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the kidney vascular stent intelligent sustained-release drug delivery structure.

[0017] Figure 2 It is a side view structure schematic diagram of a renal blood vessel stent intelligent sustained-release drug delivery structure.

[0018] Figure 3 It is Figure 1 It is an enlarged schematic view of part A of the middle part.

[0019] Figure 4 It is Figure 2 It is an enlarged schematic view of part B of the middle part.

[0020] In the figure: 1, stent; 2, anti-skid wheel; 3, sleeve; 4, pull rod; 5, threaded column; 6, drug delivery channel; 7, sealing block; 8, spring; 9, fixed rod; 10, piston rod; 11, drug delivery hole; 12, push plate; 13, locking block; 14, L-shaped rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figures 1 to 4 The present application provides a technical solution:

[0023] A renal blood vessel stent intelligent sustained-release drug delivery structure, comprising a stent 1, the stent 1 is internally provided with a drug delivery channel 6, the stent 1 is internally provided with a sleeve 3, the sleeve 3 is fixedly communicated with the drug delivery channel 6 at both sides, a plurality of drug delivery holes 11 are uniformly arranged on the outside of the drug delivery channel 6, a threaded hole is arranged at one end of the sleeve 3, a threaded column 5 is threadedly connected in the threaded hole, a piston rod 10 is slidably arranged in the sleeve 3 away from one side of the threaded hole, an anti-skid wheel 2 is fixedly arranged at the end of the threaded column 5 away from the piston rod 10, the anti-skid wheel 2 facilitates rotation of the threaded column 5 and sealing of one end of the sleeve, and a sealing block 7 is fixedly arranged at the end of the piston rod 10 close to the threaded hole.

[0024] A pushing mechanism is arranged on the rod wall of the piston rod 10, the pushing mechanism comprises a fixed rod 9, a strip-shaped hole is arranged on the rod wall of the piston rod 10, the fixed rod 9 is slidably arranged in the strip-shaped hole, the fixed rod 9 is fixedly connected with the inner side wall of the sleeve 3 at both ends, a spring 8 is fixedly arranged on the rod wall of the fixed rod 9 close to the threaded hole, the spring 8 is always in a compressed state, and the piston rod 10 can be pushed after the locking mechanism is unlocked through the spring 8.

[0025] The locking mechanism is arranged at the end of the piston rod 10 away from the threaded hole, and comprises an L-shaped rod 14, a sliding hole is arranged at the lower side of the sleeve 3 away from the threaded hole, the vertical part of the L-shaped rod 14 is arranged in the sliding hole in a sliding mode, the end of the piston rod 10 away from the threaded hole is provided with a rectangular groove matched with the horizontal part of the L-shaped rod 14, the horizontal part of the L-shaped rod 14 extends to the inside of the rectangular groove at the lower side, and the lower side of the horizontal part of the L-shaped rod 14 is fixedly provided with a locking block 13, the lower side of the rectangular groove is provided with a locking groove matched with the locking block 13, and the lower end of the vertical part of the L-shaped rod 14 is fixedly provided with a push plate 12, the contact area between the L-shaped rod 14 and the balloon can be increased through the push plate 12, the balloon is prevented from being poked by the L-shaped rod 14, and the reliability is improved.

[0026] The pull rod 4 is fixedly arranged at the end of the piston rod 10 away from the threaded hole, and the pull rod 4 facilitates pulling of the piston rod.

[0027] In use, the anti-skid wheel 2 is first rotated to drive the threaded column 5 to be screwed off from the sleeve 3, then the push plate 12 is pushed to drive the L-shaped rod 14 to move into the sleeve, the pull rod 4 is pulled to drive the piston rod 10 to move, the strip-shaped hole of the piston rod 10 extrudes the spring 8, the locking block 13 at one end of the horizontal part of the L-shaped rod 14 is pulled downward into the rectangular groove, the push plate 12 drives the locking block 13 to be clamped with the locking groove through the L-shaped rod 14, the L-shaped rod 14 and the locking block 13 can limit the piston rod 10, the required dose of liquid medicine is filled into the sleeve 3 through the threaded hole, the threaded column 5 is screwed into the threaded hole by rotating the anti-skid wheel 2, the prepared stent 1 is placed into the designated position of the blood vessel through the guide wire, the balloon is sent into the stent 1, the stent 1 is expanded after the balloon is expanded, the push plate 12 is pushed when the balloon is expanded, the push plate 12 drives the locking block 13 to move away from the locking groove through the L-shaped rod 14, the piston rod 10 is pushed by the spring 8, the liquid medicine in the sleeve 3 is driven into the administration channel 6 by the piston rod 10, and finally the slow-release administration is automatically performed through the multiple administration holes 11, the uniformity is high, the administration effect is good, and the reliability of the vascular stent is improved.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A renal vascular stent intelligent sustained-release drug delivery structure, comprising a stent (1), characterized in that: The bracket (1) has a drug delivery channel (6) inside and a sleeve (3) inside. The sleeve (3) is fixedly connected to the drug delivery channel (6) on both sides. Multiple drug delivery holes (11) are evenly provided on the outside of the drug delivery channel (6). One end of the sleeve (3) is provided with a threaded hole. A threaded post (5) is threadedly connected to the threaded hole. A piston rod (10) is slidably provided on the side of the sleeve (3) away from the threaded hole. A sealing block (7) is fixedly provided on the end of the piston rod (10) near the threaded hole. A pushing mechanism is provided on the rod wall of the piston rod (10). A locking mechanism is provided on the end of the piston rod (10) away from the threaded hole.

2. The intelligent sustained-release drug delivery structure for a renal vascular stent according to claim 1, characterized in that: The pushing mechanism includes a fixed rod (9), the piston rod (10) has a strip hole on its rod wall, the fixed rod (9) is slidably disposed in the strip hole, both ends of the fixed rod (9) are fixedly connected to the inner side wall of the sleeve (3), and a spring (8) is fixedly disposed on the rod wall of the fixed rod (9) near the threaded hole.

3. The intelligent sustained-release drug delivery structure for a renal vascular stent according to claim 1, characterized in that: The locking mechanism includes an L-shaped rod (14). The lower side of the sleeve (3) is provided with a sliding hole on the side away from the threaded hole. The vertical part of the L-shaped rod (14) is slidably disposed in the sliding hole. The piston rod (10) is provided with a rectangular groove at the end away from the threaded hole that cooperates with the horizontal part of the L-shaped rod (14). The horizontal part of the L-shaped rod (14) extends to the lower side inside the rectangular groove. A locking block (13) is fixedly provided on the lower side of the horizontal part of the L-shaped rod (14). A locking groove that cooperates with the locking block (13) is provided on the lower side of the rectangular groove.

4. The intelligent sustained-release drug delivery structure for a renal vascular stent according to claim 3, characterized in that: A push plate (12) is fixedly provided at the lower end of the vertical part of the L-shaped rod (14).

5. The intelligent sustained-release drug delivery structure for a renal vascular stent according to claim 2, characterized in that: The spring (8) is always in a compressed state.

6. The intelligent sustained-release drug delivery structure for a renal vascular stent according to claim 1, characterized in that: The threaded column (5) is fixedly provided with an anti-slip wheel (2) at the end away from the piston rod (10).

7. The intelligent sustained-release drug delivery structure for a renal vascular stent according to claim 1, characterized in that: A pull rod (4) is fixedly provided at the end of the piston rod (10) away from the threaded hole.

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