CN214908707U

CN214908707U - Self-expansion type drug coating intravascular stent

Info

Publication number: CN214908707U
Application number: CN202121238234.1U
Authority: CN
Inventors: 康小然; 武效金; 刘畅
Original assignee: Sano Shenchang Medical Technology Co ltd
Current assignee: Sano Shenchang Medical Technology Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-11-30
Anticipated expiration: 2031-06-03

Abstract

The utility model relates to the technical field of medical equipment, in particular to a self-expansion type drug coating intravascular stent, which is a network management structure formed by connecting a plurality of main ribs and a plurality of connecting ribs, wherein the main ribs are uniformly distributed along the circumferential direction, and two adjacent main ribs are connected through the connecting ribs; when the net pipe structure is in an opening state, the main ribs extend in a sine wave shape, the extending directions of the connecting ribs and the main ribs are the same, the connecting ribs are connected to one side, protruding from wave crests or wave troughs, of the main ribs, one side of the same connecting rib is connected with the wave crest of one main rib, and the other side of the connecting rib is connected with the wave trough of the other adjacent main rib; when the net pipe structure is unfolded and tiled, the main ribs are parallel to each other, and the connecting ribs extend in a fishbone shape along the extending direction of the main ribs. The different branch muscle of splice bar exerts the effort to the main muscle for vascular support's axial compliance is better, can effectively alleviate the transient non-uniform expansion phenomenon of vascular support in the inflation process, can guarantee the adherence after the support implantation simultaneously.

Description

Self-expansion type drug coating intravascular stent

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to from inflation formula medicine coating intravascular stent.

Background

Cerebral atherosclerotic stenosis is an important cause of ischemic cerebrovascular disease, and the probability of cerebral infarction increases as the degree of stenosis increases. Several studies have shown that the incidence of cerebral infarction remains high even with drug therapy. The current effective means for treating severe cerebral artery stenosis is to implant a stent in the artery. Currently common stents include ball expanded stents and self-expanding stents.

The self-expanding intravascular stent is formed by precisely carving a nickel-titanium superelastic alloy thin-walled tube by laser, reaches the diseased part of an artery through a pressing and holding type delivery catheter, is self-expanded to ensure that blood is smooth after fixation is released, and plays a role in supporting the diseased part. However, when the self-expansion type stent in the prior art is automatically expanded in a blood vessel, due to the fact that the phenomenon of instantaneous non-uniform expansion exists, the expansion degree of the end portion of the stent is far larger than that of the middle end, so that when the stent is expanded, the expansion and expansion degrees of all the positions of the stent are different, the supporting force for all the positions of the blood vessel wall is uneven in size, the bending portion of the stent is broken seriously, severe damage is caused to the artery, and operation failure is caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the self-expanding formula blood vessel support among the prior art when automatic expansion, the uneven defect that causes the artery impaired easily of inflation everywhere of support to a self-expanding formula medicine coating blood vessel support is provided.

In order to solve the technical problem, the utility model provides a self-expanding drug-coated vascular stent, which is a network management structure formed by connecting a plurality of main ribs and a plurality of connecting ribs, wherein the main ribs are uniformly distributed along the circumferential direction, and two adjacent main ribs are connected through the connecting ribs;

when the net pipe structure is in an opening state, the main ribs extend in a sine wave shape, the extending directions of the connecting ribs and the main ribs are the same, the connecting ribs are connected to one side, protruding from wave crests or wave troughs, of the main ribs, one side of the same connecting rib is connected with the wave crest of one main rib, and the other side of the connecting rib is connected with the wave trough of the other adjacent main rib;

when the net pipe structure is unfolded and tiled, the main ribs are parallel to each other, and the connecting ribs extend in a fishbone shape along the extending direction of the main ribs.

Optionally, the connecting rib comprises a plurality of first supporting ribs and a plurality of second supporting ribs which are arranged in a staggered mode, the front end of each first supporting rib is connected with the adjacent first second supporting rib, the rear end of each first supporting rib is connected with the trough of one of the main ribs, the front end of each second supporting rib is connected with the adjacent first supporting rib, and the rear end of each second supporting rib is connected with the crest of the other main rib.

Optionally, the second supporting rib is connected to a first node of the first supporting rib, the first supporting rib is connected to a second node of the second supporting rib, the distance from one end of the first supporting rib connected to the main rib to the first node is smaller than the distance from one end of the first supporting rib connected to the second supporting rib to the first node, and the distance from one end of the second supporting rib connected to the main rib to the second node is smaller than the distance from one end of the second supporting rib connected to the first supporting rib to the second node.

Optionally, the width of the cross section of the first supporting rib at the end of the first supporting rib and the first junction is larger than the width of the cross section of the first supporting rib at any position between the first junction and the end of the first supporting rib; the cross-sectional width of the second supporting rib at the end part of the second supporting rib and the second junction is larger than that of the second supporting rib at any position between the second junction and the end part of the second supporting rib.

Optionally, the cross-sectional widths of the first ribs at the first nodes and the first rib ends are 30-60 microns, and the cross-sectional width of the first ribs at positions between the first nodes and the first rib ends is 20-50 microns.

Optionally, when the network management structure is in an open state, the wave crests of the main ribs are aligned with the wave crests of the adjacent main ribs, the wave crests of the main ribs are all connected with one of the connecting ribs, and the wave troughs of the same main rib are all connected with the other connecting rib.

Optionally, at least one end of the mesh tube structure is provided with an inlay part for mounting the developing member.

Optionally, at least one end of the network management structure is provided with a visualization to indicate the position of the network management structure in the human body.

Optionally, the cross-sectional width of the main bar at the connection points of the connecting bars on the main bar is greater than the cross-sectional width of the main bar between the connection points of the connecting bars on the main bar.

Optionally, the width of the cross section of the main rib at the connection point of the connection ribs on the main rib is 30-60 micrometers, and the width of the cross section of the main rib between the connection points of the connection ribs on the main rib is 20-50 micrometers.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a self-expansion type drug coating intravascular stent, which is a network management structure formed by connecting a plurality of main ribs and a plurality of connecting ribs, wherein the main ribs are uniformly distributed along the circumferential direction, and two adjacent main ribs are connected through the connecting ribs; when the net pipe structure is in an opening state, the main ribs extend in a sine wave shape, the extending directions of the connecting ribs and the main ribs are the same, the connecting ribs are connected to one side, protruding from wave crests or wave troughs, of the main ribs, one side of the same connecting rib is connected with the wave crest of one main rib, and the other side of the connecting rib is connected with the wave trough of the other adjacent main rib; when the net pipe structure is unfolded and tiled, the main ribs are parallel to each other, and the connecting ribs extend in a fishbone shape along the extending direction of the main ribs. Through setting the splice bar to the fishbone column structure, utilize the splice bar of fishbone form to connect adjacent main muscle, automatic inflation expansion in-process in the vascular support enters into the human body, the force dispersion that the splice bar of fishbone form will strut is exerted on the main muscle, can strengthen the radial holding power of splice bar, simultaneously in the extending direction of main muscle, the effort is exerted to the main muscle to the different spinal branchs of splice bar, make vascular support's axial compliance better, can effectively alleviate the transient inhomogeneous inflation phenomenon of vascular support in the inflation process, make the process of strutting of vascular support more even smooth and easy, can effectively overcome vascular support's inhomogeneous expansion, prevent that vascular support from breaking off at inflation in-process bending part, guarantee that vascular support can not cause the damage to artery blood vessel, and then reduce the danger that vascular support put into the operation. Through making the blood vessel support evenly expand, guaranteed the outer wall parallel and level after the blood vessel support expandes, improve the adherence of blood vessel support, can effectively avoid the blood vessel to be strutted the back because the not enough blood vessel that leads to of holding power of blood vessel support contracts the narrowing again. Meanwhile, the main ribs are supported by the fishbone-shaped connecting ribs, so that the supporting force of the support in the circumferential direction is increased, the flexibility of the support is increased, and the vascular support is smoother when being placed into a human body.

2. The utility model provides a from inflation formula medicine coating intravascular stent, the splice bar is connected with adjacent preceding second brace including a plurality of first brace and a plurality of second brace of crisscross setting, the front end of first brace, and the rear end of first brace is connected with the trough of one of them main muscle, and the front end of second brace is connected with adjacent preceding first brace, and the rear end of second brace is connected with the crest of another main muscle. Through being connected to the crest or the trough department of main muscle with the splice bar, guarantee that the splice bar is enough big to the holding power of main muscle, promote vascular support's axial compliance for vascular support self can effectively overcome distortion stress, perhaps can the quick recovery original state after taking place the distortion.

3. The utility model provides a from inflation formula medicine coating intravascular stent, second brace are connected in the first junction of first brace, and the second junction of second brace is connected to first brace, and the one end that first brace and main muscle link to each other is less than the one end that first brace and second brace link to each other to the distance of first junction, and the one end that second brace and main muscle link to each other to the distance of second junction is less than the one end that second brace and first brace link to each other to the distance of second junction. Make first node and second node all be close to the main muscle setting for after the intravascular stent struts the state, first node and second node are crisscross to be arranged between two lines of main muscle, make the size and the shape in first zhi jin, second zhi jin and main muscle enclose the hole even, guarantee intravascular stent after the atress, stress can evenly transmit on intravascular stent, avoid intravascular stent local stress inequality to lead to the fracture.

4. The utility model provides a self-expansion type drug coating intravascular stent, the cross section width of a first supporting rib at the end part of the first supporting rib and a first junction point is larger than that of the first supporting rib at any position between the first junction point and the end part of the first supporting rib; the cross-sectional width of the second supporting rib at the end part of the second supporting rib and the second junction is larger than that of the second supporting rib at any position between the second junction and the end part of the second supporting rib. Set first muscle and second muscle into the variable cross section muscle for stress dispersion on first muscle and the second muscle avoids first node or second node or first muscle to produce stress concentration in the node department on the main muscle, can effectively improve the holistic radial holding power of support and resilience rate of return.

5. The utility model provides a from inflation formula medicine coating intravascular stent, the at least one end of network management structure is equipped with inlays the portion for install the development piece. Through installing the development piece on vascular support for can the branch pipe accurately observe the position that vascular support is located the human body in the operation in-process, be convenient for fix a position the position of putting into of vascular support.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a deployed, laid-flat state of a self-expanding drug-coated vascular stent provided in an embodiment of the present invention.

Fig. 2 is a schematic structural view of a connecting rib of the self-expandable drug-coated vascular stent shown in fig. 1.

Fig. 3 is a schematic structural view of a folded state of a self-expanding drug-coated vascular stent provided in an embodiment of the present invention.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic structural view of an expanded state of a self-expanding drug-coated vascular stent provided in an embodiment of the present invention.

Description of reference numerals: 1. a main rib; 2. connecting ribs; 3. an embedding part.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to fig. 5, the self-expandable drug-coated intravascular stent provided in this embodiment is a mesh tube structure formed by connecting four main ribs 1 and four connecting ribs 2, the four main ribs 1 are uniformly distributed along the circumferential direction, and two adjacent main ribs 1 are connected by the connecting ribs 2. Thrombus treatment medicines are coated on the surfaces of the main ribs 1 and the connecting ribs 2 so as to change the surface special effect of the inner wall of the blood vessel and reduce the formation of thrombus.

As shown in fig. 5, when the net pipe structure is in an open state, the main ribs 1 all extend in a sine wave shape, the extending directions of the connecting ribs 2 and the main ribs 1 are the same, the connecting ribs 2 are connected to one side of the main ribs 1 where the wave crest or the wave trough protrudes, one side of the same connecting rib 2 is connected to the wave crest of one main rib 1, and the other side of the connecting rib 2 is connected to the wave trough of another adjacent main rib 1. When the network management structure is in a spreading state, the wave crests of the main ribs 1 are aligned with the wave crests of the adjacent main ribs 1, the wave crests of the main ribs 1 are connected with one of the connecting ribs 2, and the wave troughs of the same main rib 1 are connected with the other connecting rib 2.

As shown in fig. 1 and 2, when the net pipe structure is spread and laid flat, the four main ribs 1 are parallel to each other, and the connecting rib 2 extends in a fishbone shape along the extending direction of the main ribs 1.

The connecting rib 2 comprises a plurality of first supporting ribs and a plurality of second supporting ribs which are arranged in a staggered mode, the front end of each first supporting rib is connected with the adjacent front second supporting rib, the rear end of each first supporting rib is connected with the trough of one main rib 1, the front end of each second supporting rib is connected with the adjacent front first supporting rib, and the rear end of each second supporting rib is connected with the wave crest of the other main rib 1. The second props up the muscle and connects the first nodal point department at first props up the muscle, and the second nodal point department at the second props up the muscle is connected to first props up the muscle, and the distance of one end to first nodal point that first props up muscle and main muscle 1 links to each other is less than the distance of one end to first nodal point that first props up muscle and second props up the muscle and links to each other, and the distance of one end to the second nodal point that second props up muscle and main muscle 1 links to each other is less than the distance of one end to the second nodal point that second props up muscle and first props up the muscle and link to each other. The width of the cross section of the first supporting rib at the end part of the first supporting rib and the first junction is larger than that of the cross section of the first supporting rib at any position between the first junction and the end part of the first supporting rib; the cross-sectional width of the second supporting rib at the end part of the second supporting rib and the second junction is larger than that of the second supporting rib at any position between the second junction and the end part of the second supporting rib.

The cross-sectional width of the first supporting rib at the first node and the first supporting rib end is 30-60 micrometers, and the cross-sectional width of the first supporting rib at any position between the first node and the first supporting rib end is 20-50 micrometers. In this embodiment, the width of the cross section of the first support rib at the first junction and at the two ends of the first support rib is 45 micrometers, the width of the cross section of the first support rib at the midpoint between the first junction and the end of the first support rib is 40 micrometers, and the width of the cross section of the first support rib is uniformly changed.

The second supporting rib has the same structure as the first supporting rib, the width of the cross section of the second supporting rib at the second node and the end part of the second supporting rib is 30-60 micrometers, and the width of the cross section of the second supporting rib at any position between the second node and the end part of the second supporting rib is 20-50 micrometers. In this embodiment, the width of the cross section of the second support rib at the second node and at the two ends of the second support rib is 45 micrometers, the width of the cross section of the second support rib at the midpoint between the second node and the end of the second support rib is 40 micrometers, and the width of the cross section of the second support rib is uniformly changed.

The section width of the main rib 1 at the connecting point of the connecting ribs 2 on the main rib 1 is larger than the section width of the main rib 1 between the connecting points of the connecting ribs 2 on the main rib 1. The section width of the main rib 1 at the connecting point of the connecting ribs 2 on the main rib 1 is 30-60 micrometers, and the section width of the main rib 1 between the connecting points of the connecting ribs 2 on the main rib 1 is 20-50 micrometers. In this embodiment, the width of the cross section of the main rib 1 at the connection point of the connection rib 2 on the main rib 1 is 45 micrometers, the width of the cross section at the midpoint between the connection points of the connection ribs 2 on the main rib 1 is 40 micrometers, and the width of the cross section of the main rib 1 is uniformly changed.

Both ends of the net pipe structure are provided with embedding parts 3, one end of the embedding part 3 on the net pipe structure is arranged on the main rib 1, the other end is arranged on the connecting rib 2, developing metal as a developing piece is embedded in the embedding part 3, and bosses are arranged on both sides of the embedding part 3 so as to position the embedding part 3.

The intravascular stent provided in the embodiment is made of a nickel-titanium alloy material and is formed by laser melting and carving of a nickel-titanium alloy ultrathin tube, and the thicknesses of the sections of the main ribs 1 and the connecting ribs 2 are the same. Firstly, drawing in drawing software, controlling the section widths of the main ribs 1 and the connecting ribs 2 to be gradually changed in size during drawing, guiding the prepared drawing into a laser cutting machine, and adjusting the laser power: 6w, pulse speed: and 800fs, the laser cutting machine can cut according to the configuration of the drawing. After the cutting is completed, the blood vessel stent is in a folded state, as shown in fig. 3 and 4.

By arranging the connecting ribs 2 into a fishbone-shaped structure and connecting the adjacent main ribs 1 by utilizing the fishbone-shaped connecting ribs 2, when the intravascular stent enters a human body and expands automatically, the fishbone-shaped connecting rib 2 disperses the expanding force to the main rib 1, the radial supporting force of the connecting rib 2 can be enhanced, meanwhile, in the extending direction of the main rib 1, different support ribs of the connecting rib 2 apply acting force to the main rib 1, the axial flexibility of the blood vessel support is better, the phenomenon of transient non-uniform expansion of the blood vessel support in the expansion process can be effectively relieved, the process of opening the blood vessel support is more uniform and smoother, the uneven expansion of the blood vessel support can be effectively overcome, the bending part of the blood vessel support is prevented from being broken in the expansion process, the blood vessel support is ensured not to damage the artery blood vessel, and the danger of the operation of placing the blood vessel support into the blood vessel support is further reduced. Through making the blood vessel support evenly expand, guaranteed the outer wall parallel and level after the blood vessel support expandes, improve the adherence of blood vessel support, can effectively avoid the blood vessel to be strutted the back because the not enough blood vessel that leads to of holding power of blood vessel support contracts the narrowing again. Meanwhile, the main ribs are supported by the fishbone-shaped connecting ribs, so that the supporting force of the support in the circumferential direction is increased, the flexibility of the support is increased, and the vascular support is smoother when being placed into a human body.

As an alternative embodiment, both ends of the mesh tube structure are connected with medical developing metal as a developing member, the developing member at one end of the mesh tube structure is arranged on the main rib 1, the developing member at the other end is arranged on the connecting rib 2, and the position of the mesh tube structure in the human body can be indicated by using the developing member.

In an alternative embodiment, the first ribs have a cross-sectional width of 30 microns at the first junction and at both ends of the first ribs, and the first ribs have a cross-sectional width of 20 microns at a midpoint between the first junction and the ends of the first ribs. The width of the cross section of the second supporting rib at the second junction and at the two ends of the second supporting rib is 30 micrometers, and the width of the cross section of the second supporting rib at the midpoint between the second junction and the end part of the second supporting rib is 20 micrometers. The section width of the main rib 1 at the connecting point of the connecting rib 2 on the main rib 1 is 30 micrometers, and the section width of the midpoint between the connecting points of the connecting ribs 2 on the main rib 1 is 20 micrometers.

In an alternative embodiment, the first ribs have a cross-sectional width of 60 microns at the first junction and at both ends of the first ribs, and the first ribs have a cross-sectional width of 50 microns at a midpoint between the first junction and the ends of the first ribs. The width of the cross section of the second supporting rib at the second junction and at the two ends of the second supporting rib is 60 micrometers, and the width of the cross section of the second supporting rib at the midpoint between the second junction and the end part of the second supporting rib is 50 micrometers. The cross-sectional width of the main rib 1 at the connection point of the connecting rib 2 on the main rib 1 is 60 micrometers, and the cross-sectional width at the midpoint between the connection points of the connecting ribs 2 on the main rib 1 is 50 micrometers.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A self-expansion type drug coating intravascular stent is characterized in that the stent is a net pipe structure formed by connecting a plurality of main ribs (1) and a plurality of connecting ribs (2), the main ribs (1) are uniformly distributed along the circumferential direction, and two adjacent main ribs (1) are connected through the connecting ribs (2);

when the net pipe structure is in an expanded state, the main ribs (1) extend in a sine wave shape, the extending directions of the connecting ribs (2) and the main ribs (1) are the same, the connecting ribs (2) are connected to one side, protruding from wave crests or wave troughs, of the main ribs (1), one side of the same connecting rib (2) is connected with the wave crest of one main rib (1), and the other side of the connecting rib (2) is connected with the wave trough of the other adjacent main rib (1);

when the net pipe structure is unfolded and tiled, the main ribs (1) are parallel to each other, and the connecting ribs (2) extend in a fishbone shape along the extending direction of the main ribs (1).

2. The self-expandable drug-coated intravascular stent according to claim 1, wherein the connecting ribs (2) comprise a plurality of first supporting ribs and a plurality of second supporting ribs which are arranged in a staggered manner, the front ends of the first supporting ribs are connected with the adjacent first second supporting ribs, the rear ends of the first supporting ribs are connected with the wave troughs of one of the main ribs (1), the front ends of the second supporting ribs are connected with the adjacent first supporting ribs, and the rear ends of the second supporting ribs are connected with the wave crests of the other main rib (1).

3. The self-expanding drug-coated intravascular stent of claim 2, wherein the second supporting rib is connected to a first node of the first supporting rib, the first supporting rib is connected to a second node of the second supporting rib, the distance from the end of the first supporting rib connected to the main rib (1) to the first node is smaller than the distance from the end of the first supporting rib connected to the second supporting rib to the first node, and the distance from the end of the second supporting rib connected to the main rib (1) to the second node is smaller than the distance from the end of the second supporting rib connected to the first supporting rib to the second node.

4. The self-expanding, drug-coated vascular stent of claim 3, wherein the first stiffener at the first stiffener end and the first junction has a cross-sectional width that is greater than the cross-sectional width of the first stiffener at any position between the first junction and the first stiffener end; the width of the cross section of the second supporting rib at the end part of the second supporting rib and the second node is larger than that of the cross section of the second supporting rib at any position between the second node and the end part of the second supporting rib.

5. The self-expanding, drug-coated vascular stent of claim 4, wherein the first struts at first nodes and first strut ends have a cross-sectional width of 30-60 microns and the first struts at locations between the first nodes and the first strut ends have a cross-sectional width of 20-50 microns.

6. The self-expandable drug-coated vascular stent according to any one of claims 1 to 5, wherein, in the expanded state of the mesh tube structure, the peaks of the main ribs (1) are aligned with the peaks of the adjacent main ribs (1), the peaks of the main ribs (1) are all connected with one of the connecting ribs (2), and the troughs of the same main rib (1) are all connected with the other connecting rib (2).

7. Self-expanding drug-coated vascular stent according to any of claims 1 to 5, characterized in that at least one end of the mesh tube structure is provided with an inlay (3) for mounting a developing member.

8. The self-expanding, drug-coated vascular stent according to any one of claims 1 to 5, wherein at least one end of the mesh tube structure is provided with a visualization member to indicate the position of the mesh tube structure in the human body.

9. Self-expanding drug-coated vascular stent according to any of claims 1 to 5, characterized in that the cross-sectional width of the main ribs (1) at the connection points of the connecting ribs (2) on the main ribs (1) is greater than the cross-sectional width of the main ribs (1) between the connection points of the connecting ribs (2) on the main ribs (1).

10. Self-expanding drug-coated vascular stent according to any of claims 1 to 5, characterized in that the cross-sectional width of the main ribs (1) at the connection points of the connecting ribs (2) on the main ribs (1) is 30-60 microns and the cross-sectional width of the main ribs (1) between the connection points of the connecting ribs (2) on the main ribs (1) is 20-50 microns.