Artery drug eluting stent

Abstract

The utility model relates to the technical field of medical instruments, in particular to an artery medicine eluting stent which comprises a stent base body, a medicine coating is fixedly connected to the surface of the stent base body, a storage cavity is formed in the edge of the inner wall of the stent base body, and limiting strips are fixedly connected to the two sides of the inner wall of the stent base body. The side, close to the limiting strip, of the inner wall of the support base body is fixedly connected with an elastic clamping block, and the surface of the limiting strip is slidably connected with an extension rod. Through the arrangement of the limiting strip, the limiting groove, the elastic clamping block and the clamping block groove, the device is fed into an artery through the cooperation of the friction layer in the use process, then the device is opened, and the stability of the device during opening can be enhanced through the cooperation of the limiting strip and the limiting groove in the opening process; and then after a proper position is reached, the elastic clamping block is in one clamping block groove, the elastic clamping block and the clamping block groove are matched to fix the position between the support base body and the extension rod, and the effect of enhancing the stability of the device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an arterial drug eluting stent. Background Art

[0002] Arterial stent implantation is a minimally invasive interventional treatment technology for coronary heart disease that has appeared since the mid-1980s and has developed rapidly in the past five years. Under the guidance and monitoring of X-ray imaging equipment, doctors operate puncture sheaths, angiography guidewires, angiography catheters, guide catheters, finger guidewires, balloon dilatation catheters and other auxiliary equipment to finally deliver the stent to the stenotic location of the artery. By pressurizing the stent delivery system to expand the grid-like metal stent, the stent supports the stenotic artery to restore the lumen diameter and ensure normal blood flow. Therefore, a stent is used. An existing stent lacks stability. When the device is expanded during use, it is unstable as a whole, causing the device to deviate and affecting the treatment effect; it lacks practicality. When used, it is difficult to suppress scar hyperplasia in a short period of time, causing the device to be squeezed and affecting the operation of the device. Summary of the invention

[0003] The purpose of the utility model is to provide an arterial drug eluting stent to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An arterial drug eluting stent comprises a stent base, a drug coating is fixedly connected to the surface of the stent base, a storage cavity is provided at the edge of the inner wall of the stent base, both sides of the inner wall of the stent base are fixedly connected to limit strips, an elastic block is fixedly connected to the side of the inner wall of the stent base close to the limit strip, an extension rod is slidably connected to the surface of the limit strip, circular grooves are provided at the top and bottom ends of the surface of the extension rod, and a connecting column is fixedly connected to the middle of the bottom end of the stent base.

[0006] Preferably, limiting grooves are provided on both sides of the surface of the bracket base, and the inside of the limiting grooves is slidably connected to the surface of the limiting strip.

[0007] Preferably, a plurality of clamping block grooves are provided on one side of the surface of the extension rod close to the circular groove, wherein the interior of one of the clamping block grooves is movably connected to the surface of the elastic clamping block.

[0008] Preferably, the support matrix is ​​symmetrically distributed on the upper and lower sides of the connecting column, and the support matrix is ​​cross-distributed.

[0009] Preferably, two through grooves are formed inside the stent matrix, and one end of the through groove is connected to the inside of the drug coating.

[0010] Preferably, a friction layer is fixedly connected to the bottom end of the bracket base.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The arterial drug eluting stent is provided with a limit strip, a limit groove, an elastic block and a block groove. When in use, the device is sent into the artery by the cooperation of the friction layer, and then the device is expanded. During the expansion process, the cooperation between the limit strip and the limit groove can enhance the stability of the device when expanded. After reaching the appropriate position, the elastic block is in one of the block grooves, and the two cooperate with each other to fix the position between the stent base and the extension rod, thereby achieving the effect of enhancing the stability of the device.

[0013] The arterial drug eluting stent is provided with a storage cavity, a drug coating, a through groove and a circular groove. When in use, the drug is first placed in the storage cavity, and the drug in the storage cavity is treated with a biodegradable material, and then the device is sent into the artery. When the device is expanded, the drug in the storage cavity enters the drug coating through the through groove and also enters the circular groove and is released from the extension rod. The drug is also released from the gap between the stent matrix and the extension rod, thereby achieving the effect of inhibiting scar hyperplasia. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the utility model;

[0015] Figure 2 It is a side view schematic diagram of the utility model;

[0016] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 4 It is a partial disassembly schematic diagram of the utility model.

[0018] In the figure: 1. bracket base; 2. drug coating; 3. storage cavity; 4. limit strip; 5. elastic block; 6. extension rod; 7. circular groove; 8. limit groove; 9. through groove; 10. friction layer; 11. block groove; 12. connecting column. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:

[0021] An arterial drug eluting stent comprises a stent base 1, a drug coating 2 is fixedly connected to the surface of the stent base 1, a storage cavity 3 is provided at the edge of the inner wall of the stent base 1, both sides of the inner wall of the stent base 1 are fixedly connected to limit strips 4, an elastic clamping block 5 is fixedly connected to the side of the inner wall of the stent base 1 close to the limit strip 4, an extension rod 6 is slidably connected to the surface of the limit strip 4, a circular groove 7 is provided at the top and bottom ends of the surface of the extension rod 6, and a connecting column 12 is fixedly connected to the middle of the bottom end of the stent base 1;

[0022] By setting the limiting strip 4, the limiting groove 8, the elastic clamping block 5 and the clamping block groove 11, the friction layer 10 is used to deliver the device into the artery, and then the device is expanded. During the expansion process, the limiting strip 4 and the limiting groove 8 are used to cooperate to enhance the stability of the device when expanded. After reaching the appropriate position, the elastic clamping block 5 is in one of the clamping block grooves 11, and the two cooperate with each other to fix the position between the stent base 1 and the extension rod 6, thereby achieving the effect of enhancing the stability of the device.

[0023] In this embodiment, preferably, both sides of the surface of the bracket base 1 are provided with limiting grooves 8, and the inside of the limiting grooves 8 is slidably connected to the surface of the limiting strip 4;

[0024] In this embodiment, preferably, a plurality of block grooves 11 are provided on one side of the surface of the extension rod 6 close to the circular groove 7, wherein the interior of one of the block grooves 11 is movably connected to the surface of the elastic block 5;

[0025] In this embodiment, preferably, the bracket bases 1 are symmetrically distributed on the upper and lower sides of the connecting column 12, and the bracket bases 1 are cross-distributed;

[0026] In this embodiment, preferably, two through grooves 9 are formed inside the stent matrix 1, and one end of the through groove 9 is connected to the inside of the drug coating 2;

[0027] Through the arrangement of the storage chamber 3, the drug coating 2, the through groove 9 and the circular groove 7, when in use, the drug is first placed in the storage chamber 3, the drug in the storage chamber 3 is treated with biodegradable materials, and then the device is sent into the artery. When the device is expanded, the drug in the storage chamber 3 enters the drug coating 2 through the through groove 9 and also enters the circular groove 7 and is released from the extension rod 6. The drug is also released from the gap between the stent matrix 1 and the extension rod 6, thereby achieving the effect of inhibiting scar hyperplasia.

[0028] In this embodiment, preferably, a friction layer 10 is fixedly connected to the bottom end of the bracket base 1 .

[0029] When an arterial drug eluting stent of the present embodiment is used, the drug is first placed in the storage chamber 3, the drug in the storage chamber 3 is treated with biodegradable materials, the device is sent into the artery with the cooperation of the friction layer 10, and then the device is expanded. During the expansion process, the cooperation between the limit strip 4 and the limit groove 8 can enhance the stability of the device when expanded. After reaching the appropriate position, the elastic block 5 is in one of the block grooves 11, and the two cooperate with each other to fix the position between the stent base 1 and the extension rod 6, thereby achieving the effect of enhancing the stability of the device. When the device is expanded, the drug in the storage chamber 3 enters the drug coating 2 through the through groove 9 and also enters the circular groove 7 and is released from the extension rod 6. The drug is also released in the gap between the stent base 1 and the extension rod 6, thereby achieving the effect of inhibiting scar hyperplasia. Some stent bases have round heads to prevent the device from causing secondary damage to the blood vessels.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An arterial drug eluting stent, comprising a stent matrix (1), characterized in that: The surface of the stent base (1) is fixedly connected with a drug coating (2), the edge of the inner wall of the stent base (1) is provided with a storage cavity (3), both sides of the inner wall of the stent base (1) are fixedly connected with limit strips (4), one side of the inner wall of the stent base (1) close to the limit strip (4) is fixedly connected with an elastic clamping block (5), the surface of the limit strip (4) is slidably connected with an extension rod (6), the top and bottom ends of the surface of the extension rod (6) are provided with circular grooves (7), and the middle part of the bottom end of the stent base (1) is fixedly connected with a connecting column (12).

2. An arterial drug eluting stent according to claim 1, characterized in that: Limiting grooves (8) are provided on both sides of the surface of the bracket base (1), and the interior of the limiting grooves (8) is slidably connected to the surface of the limiting strip (4).

3. An arterial drug eluting stent according to claim 1, characterized in that: A plurality of clamping block grooves (11) are provided on a side of the surface of the extension rod (6) close to the circular groove (7), wherein the interior of one of the clamping block grooves (11) is movably connected to the surface of the elastic clamping block (5).

4. An arterial drug eluting stent according to claim 1, characterized in that: The support base bodies (1) are symmetrically distributed on the upper and lower sides of the connecting column (12), and the support base bodies (1) are cross-distributed.

5. The arterial drug eluting stent according to claim 1, characterized in that: Two through grooves (9) are provided inside the stent matrix (1), and one end of the through groove (9) is connected to the inside of the drug coating (2).

6. An arterial drug eluting stent according to claim 1, characterized in that: A friction layer (10) is fixedly connected to the bottom end of the support base (1).

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