Drug eluting coronary stent

Abstract

The utility model discloses a medicament eluting coronary stent, which aims at solving the problem that the existing stent cannot be adjusted according to the diameter of a blood vessel when being used, and comprises a first arc-shaped stent, an arc-shaped adjusting frame, a limiting ball, an adjusting assembly and the like, the stent is expanded, and the arc-shaped adjusting frame slides in a second arc-shaped stent, so that the blood vessel can be conveniently and quickly eluted. When a limiting ball above the arc-shaped adjusting frame moves to the position of a through hole in the upper portion of the second arc-shaped support, the limiting ball is pushed out from the interior of the arc-shaped adjusting frame through a spring, the arc-shaped adjusting frame can be fixed into the second arc-shaped support, and when the blood vessel contracts to drive the limiting ball to contract towards the interior of the arc-shaped adjusting frame, the blood vessel can be fixed into the second arc-shaped support. The spring is driven to contract inwards through contraction of the limiting ball, so that the stent can contract and expand to a certain extent in the blood vessel, the blood vessel can be effectively protected against damage, proliferation of smooth muscles in the blood vessel cannot be stimulated, and thrombus in the blood vessel is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, especially to a drug-eluting coronary stent. BACKGROUND

[0002] A huge coronary heart disease patient population brings huge medical market demand. As an effective coronary heart disease treatment method, the drug-eluting coronary stent has the advantages of small trauma, fast recovery, significant effect, etc., and is widely recognized by doctors and patients, and has a broad market prospect. This also prompts many medical device companies to increase investment in the research and production of drug-eluting coronary stents, and promotes the continuous development and innovation of the technology.

[0003] The traditional drug-eluting coronary stent only has the basic function of supporting the blood vessel wall, although it can achieve the effect of supporting the blood vessel wall and preventing the blood vessel wall from closing again to a certain extent, but it also has many limitations. After the drug-eluting coronary stent is implanted, its relatively fixed structure will limit the natural contraction and expansion ability of the blood vessel to a certain extent, making it difficult for the blood vessel to adjust the pipe diameter flexibly according to factors such as physical activity and blood pressure changes, thereby affecting the regulation of local blood flow.

[0004] Secondly, the stent will cause stress concentration phenomenon at the two ends and other parts of the blood vessel wall. Long-term stress concentration will cause mechanical damage to the blood vessel wall, activate abnormal reactions of blood vessel wall cells, promote the release of inflammatory factors and growth factors, further aggravate pathological changes of the blood vessel wall, and may lead to complications such as progression of atherosclerotic plaques, thinning of the blood vessel wall, or aneurysm formation.

[0005] In addition, if the blood vessel lesion is severe, the stent may be difficult to completely adhere to the blood vessel wall. Poor adhesion will cause gaps between the stent and the blood vessel wall, which on the one hand affects the uniform release of drugs to the blood vessel wall and reduces the therapeutic effect of drugs; on the other hand, thrombus may form in the gap, increasing the risk of cardiovascular events.

[0006] In summary, the drug-eluting coronary stent has deficiencies in terms of regulation effect and fixation effect, and cannot meet the needs of the stent in supporting the inner wall of the blood vessel. Therefore, developing a drug-eluting coronary stent has important practical significance for the stent to better adapt to physiological needs, maintain normal blood flow speed and pressure, and avoid problems such as thrombus formation caused by excessively slow blood flow. UTILITY MODEL CONTENT

[0007] In order to overcome the above technical problems,

[0008] The utility model discloses a technical scheme for a medicine eluting coronary stent, which comprises a first arc-shaped support, an arc-shaped adjusting support and an adjusting assembly.

[0009] As a preferred, the first fixed frame is provided with a third arc-shaped support on one side.

[0010] As a preferred, the third arc-shaped support is provided with a second fixed frame on one side, and the second fixed frame is fixedly connected with the second arc-shaped support.

[0011] As a preferred, the first fixed frame, the second fixed frame and the arc-shaped adjusting support are provided with a connecting frame on top, and the connecting frame is provided with three groups.

[0012] As a preferred, the arc-shaped adjusting support slides in the connecting frame.

[0013] As a preferred, the connecting frame is provided with a medicine storage groove on top, and the medicine storage groove is provided with multiple groups.

[0014] As a preferred, the connecting frame is provided with a protective coating on top.

[0015] The utility model discloses a beneficial effect: the utility model discloses a clever structure design, realized the combination of adjusting effect and fixed effect, on one hand, through the support strutting, through the arc-shaped adjusting support in the inside sliding of second arc-shaped support, when the limiting ball on the arc-shaped adjusting support moves to the position of the through -hole on the second arc-shaped support, through the spring, the limiting ball is pushed out from the arc-shaped adjusting support inside, can fix the arc-shaped adjusting support to the inside of second arc-shaped support, when the blood vessel contracts and drives the limiting ball to contract to the arc-shaped adjusting support inside, through the contraction of limiting ball and drive spring to contract inwards, so that the support can also have a certain amount of contraction and expansion in the blood vessel, can effectively protect the blood vessel from being damaged, can not stimulate the proliferation of smooth muscle in the blood vessel, effectively prevent the formation of thrombus in the blood vessel.

[0016] On the other hand, through the fixed connection of the first fixed frame and the third arc-shaped support, the fixed connection of the first arc-shaped support and the arc-shaped adjusting support, and the fixed connection of the third arc-shaped support and the first arc-shaped support through the second fixed frame, the support can be more stable, can be closely attached to the blood vessel wall, and is not easy to be displaced or deformed, so that the support can effectively expand the narrow blood vessel and restore the normal blood flow channel, thereby improving the success rate of the operation and reducing the risk of operation failure caused by improper placement of the support. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The first three-dimensional structure schematic view of the drug eluting coronary stent is shown.

[0018] Figure 2 The second three-dimensional structure schematic view of the drug eluting coronary stent is shown.

[0019] Figure 3 The first partial three-dimensional structure schematic view of the drug eluting coronary stent is shown.

[0020] Figure 4 The second partial three-dimensional structure schematic view of the drug eluting coronary stent is shown.

[0021] Figure 5 The partial cross-section three-dimensional structure schematic view of the drug eluting coronary stent is shown.

[0022] The figure mark explanation: 1, first arc-shaped support; 2, first fixed frame; 3, arc-shaped adjusting frame; 4, second arc-shaped support; 5, third arc-shaped support; 6, second fixed frame; 101, spring; 102, limiting ball; 201, connecting frame; 202, medicine storage groove; 203, protective coating. DETAILED DESCRIPTION

[0023] The utility model will be further explained in connection with the drawings and examples.

[0024] Please refer to Figures 1-5The utility model provides a kind of embodiment: drug eluting coronary stent, including first arc support 1, still including arc adjusting frame 3 and adjusting assembly, the side of first arc support 1 is provided with first fixed frame 2, the side of first arc support 1 is provided with adjusting assembly, the other side of first arc support 1 is provided with arc adjusting frame 3, the upper portion of arc adjusting frame 3 is equipped with hole, the inside of hole is provided with spring 101, the side of spring 101 is provided with limit ball 102, the side of arc adjusting frame 3 is provided with second arc support 4, the upper portion of second arc support 4 is equipped with through hole, through hole is equipped with multiple groups, arc adjusting frame 3 slides in the inside of second arc support 4, by stent strutting, by arc adjusting frame 3 sliding in the inside of second arc support 4, when limit ball 102 above arc adjusting frame 3 moves to the position of through hole above second arc support 4, limit ball 102 is pushed out from the inside of arc adjusting frame 3 by spring 101, can be fixed to the inside of second arc support 4 by arc adjusting frame 3, when blood vessel contracts and drives limit ball 102 to contract to the inside of arc adjusting frame 3, by the contraction of limit ball 102 drives spring 101 to contract inwards, so that stent can also have a certain amount of contraction and expansion in the inside of blood vessel, can effectively protect blood vessel from being damaged, cannot stimulate the proliferation of smooth muscle in the inside of blood vessel, effectively prevent thrombus formation in the inside of blood vessel.

[0025] Please refer to Figures 1-5 In the embodiment, the side of first fixed frame 2 is provided with third arc support 5, the side of third arc support 5 is provided with second fixed frame 6, second fixed frame 6 is fixedly connected with second arc support 4, by first fixed frame 2 and third arc support 5 fixed connection, by first arc support 1 and arc adjusting frame 3 fixed connection, by third arc support 5 and first arc support 1 fixed connection through second fixed frame 6, so that stent can be more stable, can be closely attached to blood vessel wall, not prone to displacement or deformation, ensure that stent can effectively prop open narrow blood vessel, restore normal blood flow passage, so as to improve the success rate of operation, reduce the risk of operation failure caused by improper placement of stent.

[0026] Please refer to Figures 1-5In the embodiment, a connecting frame 201 is arranged above the first fixing frame 2, the second fixing frame 6 and the arc-shaped adjusting frame 3, the connecting frame 201 is provided with three groups, the arc-shaped adjusting frame 3 slides in the connecting frame 201, a drug storage groove 202 is arranged above the connecting frame 201, the drug storage groove 202 is provided with multiple groups, a protective coating 203 is arranged above the connecting frame 201, multiple drug storage grooves 202 are arranged above the connecting frame 201, which can provide a special storage space for the drug, ensure continuous drug supply for a long time after the stent is implanted, maintain effective treatment of vascular lesions, meet long-term treatment needs, the protective coating 203 serves as a carrier of the drug, the drug in the drug storage groove 202 is slowly and continuously released, which can ensure that the drug maintains a relatively stable concentration in the local tissue, and prevents problems such as ineffective inhibition of vascular intimal hyperplasia due to too low drug concentration.

[0027] In the working process, the stent is expanded, the arc-shaped adjusting frame 3 slides in the second arc-shaped stent 4, when the limiting ball 102 above the arc-shaped adjusting frame 3 moves to the position of the through hole above the second arc-shaped stent 4, the limiting ball 102 is pushed out of the arc-shaped adjusting frame 3 by the spring 101, the arc-shaped adjusting frame 3 can be fixed in the second arc-shaped stent 4, when the blood vessel contracts and drives the limiting ball 102 to shrink into the arc-shaped adjusting frame 3, the spring 101 is driven to shrink inward by the shrinkage of the limiting ball 102, so that the stent can also have a certain amount of shrinkage and expansion in the blood vessel, which can effectively protect the blood vessel from damage and stimulate the proliferation of smooth muscle in the blood vessel, effectively prevent the formation of thrombus in the blood vessel, the first fixing frame 2 is fixedly connected with the third arc-shaped stent 5, the first arc-shaped stent 1 is fixedly connected with the arc-shaped adjusting frame 3, the third arc-shaped stent 5 is fixedly connected with the first arc-shaped stent 1 through the second fixing frame 6, so that the stent is more stable and can be closely attached to the blood vessel wall, which is not easy to displace or deform, ensuring that the stent can effectively expand the narrow blood vessel and restore the normal blood flow channel, thereby improving the success rate of the operation and reducing the risk of operation failure caused by improper placement of the stent, multiple drug storage grooves 202 are arranged above the connecting frame 201, which can provide a special storage space for the drug, ensure continuous drug supply for a long time after the stent is implanted, maintain effective treatment of vascular lesions, meet long-term treatment needs, the protective coating 203 serves as a carrier of the drug, the drug in the drug storage groove 202 is slowly and continuously released, which can ensure that the drug maintains a relatively stable concentration in the local tissue, and prevents problems such as ineffective inhibition of vascular intimal hyperplasia due to too low drug concentration.

[0028] Through the above steps, by supporting the stent, by sliding the arc-shaped adjusting frame 3 inside the second arc-shaped support 4, when the limiting ball 102 above the arc-shaped adjusting frame 3 moves to the position of the through hole above the second arc-shaped support 4, the limiting ball 102 is pushed out from the inside of the arc-shaped adjusting frame 3 by the spring 101, the arc-shaped adjusting frame 3 can be fixed to the inside of the second arc-shaped support 4, when the blood vessel contracts and drives the limiting ball 102 to contract inside the arc-shaped adjusting frame 3, the spring 101 is driven to contract inwardly by the contraction of the limiting ball 102, so that the stent also has a certain amount of contraction and expansion inside the blood vessel, which can effectively protect the blood vessel from being damaged, will not stimulate the proliferation of smooth muscle inside the blood vessel, effectively prevent the formation of thrombus inside the blood vessel.

Claims

1. A drug eluting coronary stent comprising a first arcuate stent (1) characterised in that: The arc-shaped adjusting frame (3) and the adjusting assembly are further included, one side of the first arc-shaped support (1) is provided with the first fixed frame (2), one side of the first arc-shaped support (1) is provided with the adjusting assembly, the other side of the first arc-shaped support (1) is provided with the arc-shaped adjusting frame (3), a hole is formed in the upper portion of the arc-shaped adjusting frame (3), a spring (101) is arranged in the hole, a limiting ball (102) is arranged on one side of the spring (101), one side of the arc-shaped adjusting frame (3) is provided with the second arc-shaped support (4), a through hole is formed in the upper portion of the second arc-shaped support (4), a plurality of groups of through holes are formed, and the arc-shaped adjusting frame (3) slides in the second arc-shaped support (4).

2. The drug eluting coronary stent of claim 1, wherein: One side of the first fixed frame (2) is provided with the third arc-shaped support (5).

3. The drug eluting coronary stent of claim 1, wherein: One side of the third arc-shaped support (5) is provided with the second fixed frame (6), and the second fixed frame (6) is fixedly connected with the second arc-shaped support (4).

4. The drug eluting coronary stent of claim 3, wherein: The upper portions of the first fixed frame (2), the second fixed frame (6) and the arc-shaped adjusting frame (3) are provided with the connecting frame (201), and the connecting frame (201) is provided with three groups.

5. The drug eluting coronary stent of claim 3, wherein: The arc-shaped adjusting frame (3) slides in the connecting frame (201).

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