CN215821051U - Plugging system and plugging support - Google Patents

Abstract

The utility model relates to an occlusion system and an occlusion stent, wherein the occlusion stent has a proximal end and a distal end, the proximal end refers to the end of the occlusion stent close to an operator during a surgical operation, and the proximal end of the occlusion stent is used for connecting to a delivery device. Distal refers to the end of the occluding stent away from the operator during the surgical procedure. And the occlusion system is formed with at least two rows of cells in a proximal to distal direction. The occluding stent has a contracted state in which the lattice is closed and an expanded state in which the lattice is expanded, and in the expanded state, the expanded range of the lattice tends to increase in the proximal to distal direction. The plugging support has better compliance, so that an operator can cover most of auricles of complex types by selecting one type of plugging support, the occurrence probability of the conditions of shoulder exposure, residual leakage and the like after the plugging support is released is reduced while the difficulty of complex auricle surgery is reduced, and the success rate of the surgery is improved.

Description

Plugging system and plugging support

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a plugging system and a plugging support.

Background

Atrial fibrillation is the most common persistent arrhythmia and is at risk of inducing ischemic stroke, and therefore prevention of atrial fibrillation is of great importance. The risk of ischemic stroke due to atrial fibrillation can be effectively prevented by plugging the left atrial appendage.

In the performance indexes of the left atrial appendage occluder, the compliance performance and the support performance play an important role in the clinical effect in the surgical process and after the surgery. The adaptability affects the adaptability of the left auricle occluder to different forms of auricles, and the support performance affects the stability of the occluder in the left auricle. Compliance and support properties also have a significant impact on the occlusion effect of the postoperative left atrial appendage occluder.

The existing occluder has strong supporting force and good anchoring performance, but because of unreasonable structural design of the occluder, the compliance performance of the product is poor, the applicability to auricles with complex shapes is poor, and the conditions of shoulder exposure, residual leak occlusion and the like after the occluder is released are easily caused.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an occlusion system and an occlusion stent for improving the compliance of the occlusion system.

In one aspect, the present application provides a plugging support, plugging support has relative near-end and distal end, the near-end is the connecting piece of closed structure, the distal end is open structure, follows the near-end arrives the distal end direction, plugging support contains two row at least grids, two row at least grids are including being close to the near-end of near-end is arranged the net and is close to the distal end of distal end is arranged the net, plugging support has the messenger the closed shrink state of grid and messenger the expansion state that the net expanded the expansion state under, follow the near-end arrives the distal end direction, the extension scope of net is the increase trend.

The expansion range of the grid of the plugging support is gradually increased from the near end to the far end under the unfolding state of the plugging support, namely the grid close to the near end of the plugging support is smaller, so that the supporting performance of the plugging support is ensured. And the net that is close to the distal end of plugging support is great to make the distal end of plugging support have better extensibility and deformability, make the plugging support have better compliance, make the art person cover most complicated type's auricle through choosing for use a type of plugging support, reduce the emergence probability of the circumstances such as the shoulder that exposes after the plugging support releases and residual hourglass when reducing complicated auricle operation degree of difficulty, improve the success rate of operation.

The technical solution of the present application is further described below:

an occlusion stent, said occlusion stent having opposite proximal and distal ends, said proximal end being a connector of a closed configuration and said distal end being an open configuration, said occlusion system being formed with at least two rows of cells in a direction from said proximal end to said distal end, said occlusion stent having a collapsed configuration wherein said cells are closed and an expanded configuration wherein said cells are expanded, said expanded configuration having an increasing trend in a direction from said proximal end to said distal end.

In one embodiment, in the deployed state, each row of the meshes includes a plurality of mesh openings arranged along the circumferential direction of the occlusion stent, and the expansion range of the meshes is the area of the mesh openings in the deployed state.

In one embodiment, the blocking support comprises a plurality of main rods, at least one end of each main rod is connected with two support rods, in the unfolding state, the main rods and/or the support rods define the net opening, any main rod is coplanar with the central axis of the blocking support, and the support rods form included angles with a vertical plane passing through the central axis of the blocking support.

In one embodiment, the width of the stem is twice the width of the stem.

In one embodiment, the mesh openings of the distal row of mesh cells are hexagonal.

In one embodiment, the rod members of the near-end row grid include a plurality of first main rods arranged at intervals in the circumferential direction of the connecting member, one end of each first main rod is connected to the connecting member, the other end of each main rod is connected to two first support rods, each first support rod is connected to another adjacent first support rod, the two adjacent first main rods and the two connected first support rods jointly define the net openings forming the near-end row grid, and in the near-end row grid, the two adjacent net openings share one first main rod.

In one embodiment, the rod member of the far-end row grid includes a plurality of second main rods arranged at intervals along the circumferential direction of the blocking support, one end of each second main rod is connected with two second branches, two second branches are respectively connected with another adjacent second branch, the other end of each second main rod is connected with two third branches, two third branches are respectively connected with another adjacent third branch, two connected second branches, two adjacent second main rods and two connected third branches jointly define the net openings of the far-end row grid, and in the far-end row grid, two adjacent net openings share one second main rod.

In one embodiment, the at least two rows of grids further comprise at least one middle row of grids between the near-end row of grids and the far-end row of grids, and the rod piece defining one net opening in the middle row of grids comprises two fourth struts and two fifth struts, wherein one ends of the two fourth struts are connected, the other ends of the two fourth struts are connected with one ends of the two fifth struts in a one-to-one correspondence manner, and the other ends of the two fifth struts are connected with each other; and in the middle row of grids in the same row, two fourth supporting rods for defining two adjacent net openings are connected, and two fifth supporting rods for defining two adjacent net openings are connected.

In one embodiment, the mesh openings of the mesh in the proximal row comprise a first divergent angle and a second divergent angle, the first divergent angle being an included angle between two adjacent first main stems, the first divergent angle being opposite to the second divergent angle, the first divergent angle being 20 ° -35 °, the second divergent angle being 20 ° -60 °, and a distance from a vertex of the second divergent angle to a vertex of the first divergent angle being less than or equal to 1/3 of a distance from a vertex of the first divergent angle to a vertex of the mesh in the distal row.

In one embodiment, the occlusion stent further comprises an anchor disposed on the second main shaft.

In one embodiment, the anchor is disposed on the second stem.

In one embodiment, the anchor is angled with respect to the second stem and the angled opening is toward the proximal end.

In one embodiment, the anchor and the second stem define a V-like shape, and the second stem includes a circular arc shape curved toward the anchor.

In one embodiment, the central axes of the anchor, the second primary shaft, and the occlusion stent are coplanar.

In one embodiment, the anchor is angled with respect to a vertical plane passing through the central axis of the second stem and the occlusion stent, and the second stem includes a curved section that curves away from the anchor.

In one embodiment, in the deployed state, the equivalent diameter of the occlusion stent is L, and the distance from the proximal end to the distal end is L/2-1.5L.

In another aspect, the present application further provides an occlusion system comprising the occlusion stent described above.

The expansion range of the grid of the plugging support is gradually increased from the near end to the far end in the unfolding state of the plugging system, namely the grid close to the near end of the plugging support is smaller, so that the supporting performance of the plugging support is ensured. And the net is bigger near the distal end of the plugging support, so that the distal end of the plugging support has better extensibility and deformability, and the plugging support has better compliance, so that an operator can cover most of auricles of complex types by selecting one type of plugging system, thereby reducing the occurrence probability of the conditions of shoulder exposure, residual leakage and the like after the release of the plugging system while reducing the difficulty of the complex auricle surgery, and improving the success rate of the surgery.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of an occluding stent in an expanded state according to an embodiment;

FIG. 2 is a top view of the occluding stent shown in FIG. 1;

FIG. 3 is a schematic view of the occluding stent shown in FIG. 1 in a contracted state;

FIG. 4 is an enlarged view of a portion A shown in FIG. 1;

FIG. 5 is a schematic view of another embodiment of an occluding stent in a deployed state;

fig. 6 is a schematic structural view of the occluding stent shown in fig. 5 in a contracted state.

Description of reference numerals:

10. a proximal end; 11. a connecting member; 20. a distal end; 31. a first node; 32. a second node; 33. a third node; 34. a fourth node; 35. a fifth node; 36. a sixth node; 41. a first row of grids; 42. a second row of grids; 43. a third row of grids; 44. a fourth row of grids; 50. an anchor; 61. a first main bar; 62. a second main bar; 71. a first support bar; 72. a second support bar; 73. a third support bar; 80. a central axis.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In particular, one aspect of the present application provides an occlusion stent for supporting a covering membrane of an occlusion system and occluding a left atrial appendage in the occlusion system. Specifically, referring to fig. 1, one embodiment of the occluding stent has opposite proximal 10 and distal 20 ends, where proximal 10 refers to the end of the occluding stent that is near the operator during a surgical procedure and proximal 10 of the occluding stent is used to attach to a delivery device. Distal end 20 refers to the end of the occluding stent that is distal to the operator during the surgical procedure. And the occlusion system is formed with at least two rows of cells in the proximal 10 to distal 20 direction. The occluding stent has a contracted state in which the lattice is closed and an expanded state in which the lattice is expanded, the expanded range of the lattice increasing in the direction from the proximal end 10 to the distal end 20.

Specifically, before the occlusion stent is delivered to the left atrial appendage, the occlusion stent is in a contracted state so as to be delivered to the left atrial appendage by a delivery device. When the plugging support is conveyed to a preset position, the plugging support is released and unfolded to form an unfolded state, and then the left auricle can be plugged by the plugging support. Further, in the expanded state, each row of meshes comprises a plurality of mesh openings arranged along the circumferential direction of the plugging support. The expansion range of the grid refers to the area of the net opening in the expanded state.

In the expanded state of the plugging support, the expansion range of the grid of the plugging support is gradually increased from the near end 10 to the far end 20, namely the grid close to the near end 10 of the plugging support is smaller, so that the strength of the near end 10 of the plugging support is higher, and the supporting performance of the plugging support is ensured. And it is great to be close to the distal end 20 net of plugging system to make plugging support distal end 20 have better extensibility and deformability, make the plugging support have better compliance, make the art person cover most complicated type's auricle through choosing for use a type of plugging support, reduce the emergence probability of the circumstances such as the shoulder that exposes after the plugging support releases and residual hourglass when reducing complicated auricle operation degree of difficulty, improve the success rate of operation.

Further, the plugging support comprises a plurality of main rods, at least one end of each main rod is connected with two branch rods, in the unfolding state, the main rods and/or the branch rods form a net opening of a grid in a surrounding mode, any main rod is coplanar with the central axis 80 of the plugging support, and the branch rods form included angles with the vertical plane passing through the central axis 80 of the plugging support. Wherein the central axis 80 of the occluding stent refers to the axis passing through the center of the connecting member 11 when in the deployed state. Specifically, referring to fig. 1 to 3, taking a three-row plugging support as an example, the main rods include a first main rod 61 and a second main rod 62. One end of the first main bar 61 is connected with two first branches 71, one end of the second main bar 62 is connected with two second branches 72, and the other end of the second main bar 62 is connected with two third branches 73.

Furthermore, the width of the main rod is twice the width of the branch rod, and the reasonable configuration of the widths of the main rod and the branch rod can ensure that the support performance of the plugging support is improved, and the support performance and the compliance performance are well balanced. Referring to fig. 1, in the embodiment, the first main rod 61 is used for connecting with the connecting element 11, and the second main rod 62 is generally used for setting an anchoring structure of the plugging system, so that the width of the first main rod 61 and the width of the second main rod 62 are twice that of the other branches, and the support strength of the two positions can be ensured. And other parts of the plugging support are composed of relatively thin supporting rods, so that the compliance of the plugging support is improved.

Further, the at least two rows of cells include a proximal 10 row of cells near the proximal end 10 and a distal row of cells near the distal end 20. Specifically, referring to fig. 1 to 3, taking an occlusion stent designed with three rows of meshes as an example, in a deployed state, the occlusion stent forms three rows of meshes, namely a first row of meshes 41, a second row of meshes 42 and a third row of meshes 43 from the proximal end 10 to the distal end 20. The expansion range of the first row grid 41, the second row grid 42 and the third row grid 43 is gradually increased. In this embodiment, the first row of grids 41 is a proximal row of grids, and the third row of grids 43 is a distal row of grids.

With continued reference to fig. 1 to 3, the rod members of the first row of grids 41 (proximal row of grids) include a plurality of first main rods 61 arranged at intervals around the circumference of the connecting member 11, one end of each first main rod 61 is connected to the connecting member 11, the other end of each main rod is connected to two first struts 71, each of the two first struts 71 is connected to another adjacent first strut 71, and the two adjacent first main rods 61 and the two connected first struts 71 jointly define the net openings forming the first row of grids 41 (proximal row of grids), so that the net openings of the first row of grids 41 are in a diamond-like structure. It is worth noting that in the proximal row grid, two adjacent net ports share one first main rod 61.

With continued reference to fig. 1 to 3, the third row of cells 43 (distal row of cells) has a hexagonal structure, the members of the third row of cells 43 (distal row of cells) include a plurality of second stems 62 spaced apart from each other along the circumferential direction of the plugging support, one end of the second stem 62 is connected to two second struts 72, each of the two second struts 72 is connected to another second strut 72 adjacent thereto, the other end of the second stem 62 is connected to two third struts 73, each of the two third struts 73 is connected to another third strut 73 adjacent thereto, the two connected second struts 72, the two second stems 62 adjacent thereto and the two connected third struts 73 together define the mesh openings forming the third row of cells 43 (distal row of cells), thereby make the net gape of third row net 43 be the hexagon structure, the hexagon structure makes shutoff support overall structure compliance better. It is worth noting that in the far-end row grid, two adjacent net ports share one second main rod 62.

Further, the at least two rows of meshes further include at least one row of intermediate row meshes located between the proximal row meshes and the distal row meshes, in this embodiment, the second row meshes 42 are the intermediate row meshes, specifically, the rod member defining one mesh opening in the second row meshes 42 (the intermediate row meshes) includes two fourth struts and two fifth struts, it is worth to be noted that, in the occlusion scaffold designed by the three rows of meshes, the fourth struts and the first struts 71 are the same rod member, and the fifth struts and the second struts 72 are the same rod member. Furthermore, one ends of the two fourth supporting rods are connected, the other ends of the two fourth supporting rods are connected with one ends of the two fifth supporting rods in a one-to-one correspondence mode, and the other ends of the two fifth supporting rods are connected with each other, so that the net openings of the middle row of grids are of a rhomboid structure. Furthermore, in the middle grid of the same row, two fourth struts for defining two adjacent net openings are connected, and two fifth struts for defining two adjacent net openings are connected.

Further, in the present embodiment, the number of the first main bars 61 is 12, the number of the second main bars 62 is the same as the number of the first main bars 61, and the number of the first branches 71, the number of the second branches 72, and the number of the third branches 73 are all twice as many as the number of the first main bars 61, i.e., 24. It should be noted that the number of the first master rods 61 and the number of the second master rods 62 are not limited to 12 in the present application, and in other embodiments, the number of the first master rods 61 and the number of the second master rods 62 may also be 8, 14, 18, or the like, and are not limited herein. The number of the first struts 71, the number of the second struts 72 and the number of the third struts 73 are all twice that of the first main rod 61, so that the sealing performance of the plugging system adopting the plugging bracket is also improved by two times.

Further, the height of the occluding stent (i.e., the distance from the proximal end 10 to the distal end 20) cannot be too high or too low, taking into consideration the anchoring properties of the occluding stent and the suitability for different atrial appendages. Preferably, in the deployed state, the equivalent diameter of the occlusion stent is L, and the distance from the proximal end 10 to the distal end 20 is L/2-1.5L. Wherein, the equivalent diameter refers to the largest dimension of the occluding stent in a direction perpendicular to the proximal end 10 to the distal end 20 in the fully deployed state. Preferably, the distance from the proximal end 10 to the distal end 20 is 3L/4. For example, in this embodiment, the equivalent diameter of the occluding stent is 29mm, and after it is fully deployed, the distance from the proximal end 10 to the distal end 20 of the occluding stent is 15mm-29 mm. Preferably, 21.75 mm.

When the number of the rod pieces designed by the plugging support and the size specification of the plugging system are fixed, the expansion range of the grid of the plugging support is related to the positions of the nodes of the grid and the expansion angle of the grid. Specifically, referring to fig. 1-2, continuing to take the example of three rows of plugging brackets designed in a grid, in this embodiment, the junction of the first main rod 61 and the connecting member 11 forms a first node 31, the junction of the first main rod 61 and the first branch 71 forms a second node 32, and the junction of two adjacent first branches 71 forms a third node 33. The junction of the second primary bar 62 and the second branch 72 forms a fourth node 34, the junction of the second primary bar 62 and the third branch 73 forms a fifth node 35, and the junction of two adjacent third branches 73 forms a sixth node 36. Wherein the extension range of the first-row grid 41 is defined by the first node 31, the second node 32 and the third node 33 together; the extension of the second row of grid 42 is defined by the second node 32, the third node 33, and the fourth node 34; the expanded range of the third row of mesh 43 is defined collectively by the third node 33, the fourth node 34, the fifth node 35, and the sixth node 36.

Further, referring to fig. 2, the net openings of the first row of meshes 41 have opposite first spread angles a and second spread angles b, the first spread angle a is an included angle between two adjacent first stems 61, the magnitude of the first spread angle a is related to the number of first stems 61 of the first row of meshes 41, and the first spread angle a ranges from 20 ° to 35 °. Preferably, the first divergence angle a is approximately 30 ° in the present embodiment. The magnitude of the second divergence angle b is related to the position of the second node 32 and the third node 33. The second spread angle b ranges from 20 to 60 °. Further, the distance from the vertex of the first expansion angle a to the vertex of the second expansion angle b is less than or equal to 1/3 from the vertex of the first expansion angle a to the vertex of the grid of the distal row, so that the proximal end of the occlusion stent is more stable and the occlusion stent is more compliant as a whole; in the present embodiment, the vertex of the first spread angle a is the first node 31, the vertex of the second spread angle b is the third node 33, and the vertex of the mesh in the distal row is the sixth node 36, that is, the distance from the first node 31 to the third node 32 is less than or equal to 1/3 of the distance from the first node 31 to the sixth node 36. Further, the position of the second node 32 is located at an intermediate position of the third node 33 and the first node 31, and the second spread angle b is approximately 30 °.

Similarly, referring to fig. 1, the orifices of the second row of cells 42 have opposite third and fourth divergent angles c, c ranging from 20 ° to 70 °, preferably 30 °. The fourth divergence angle d ranges from 20 ° to 60 °, preferably 45 °.

Further, the third row of cells 43 has a fifth divergence angle e and a sixth divergence angle f opposite to each other, the third divergence angle e being in the range of 30 ° to 90 °, preferably 60 °. The fourth divergence angle f ranges from 30 ° to 90 °, preferably 60 °. Further, for three rows of occluding stents designed in a lattice, the fourth node 34 is generally located at the anchoring site, and therefore, in this embodiment, the position of the fourth node 34 is greater than or equal to 3/4 of the distance from the proximal end 10 to the distal end 20 of the occluding stent, so that the occluding stent is more compliant.

Further, referring to fig. 1 and 4, the occlusion stent further comprises an anchor 50 for anchoring the occlusion stent. Specifically, in the present embodiment, the anchor 50 is provided on the second main bar 62. The anchoring elements 50 are intended to be anchored to body tissue after deployment of the occluding stent.

Referring to fig. 4, the anchor 50 is angled from the shaft with the angled opening toward the proximal end 10. Preferably, the anchor 50 forms an approximately V-shaped anchoring structure with the rod; preferably, the rod is circular arc-shaped here. Specifically, the anchor 50 is disposed on the second main rod 62, the anchor 50 and the second main rod 62 define a V-like shape, and the second main rod 62 includes a circular arc shape curved toward the anchor 50. After the plugging support is anchored on the auricle wall, the auricle wall can have certain contractility to the plugging support, and the V-shaped anchoring structure can disperse the force, so that the anchoring structure is not easy to deform. Further, the second main stem 62 includes a curved section that curves away from the anchor 50. By bending the second main shaft 62 away from the anchoring element 50, the holding force of the anchoring structure is increased, ensuring that the occlusion stent is firmly anchored to the atrial appendage wall.

Further, referring to fig. 1 and 4, the central axes 80 of the anchor 50, the second main stem 62, and the occluding bracket are coplanar. I.e. the angle formed by the anchor 50 and the second main stem 62 lies in a vertical plane passing through the central axis 80 of the occluding bracket. It should be noted that in another embodiment, the central axes 80 of the anchor 50, the second stem 62, and the occluding bracket may not be coplanar, i.e., the anchor 50 is angled with respect to a vertical plane passing through the central axes 80 of the second stem 62 and the occluding bracket, thereby improving the anchoring effect.

It should be noted that the number of the meshes of the occlusion scaffold is more than three rows, and in other embodiments, the number of the meshes of the occlusion scaffold may be two rows, four rows or more. In another embodiment, such as shown in fig. 5 and 6, the occluding stent has opposite proximal 10 and distal 20 ends. And in the expanded state, the occlusion stent forms four rows of meshes, namely a first row of meshes 41, a second row of meshes 42, a third row of meshes 43 and a fourth row of meshes 44 from the proximal end 10 to the distal end 20. The expansion range of the first row grid 41, the second row grid 42, the third row grid 43 and the fourth row grid 44 is gradually increased. In this embodiment, the first row of cells 41 is the proximal row of cells, the fourth row of cells 44 is the distal row of cells, and the second row of cells 42 and the third row of cells 43 are the middle row of cells. Preferably, the first row of cells 41, the second row of cells 42 and the third row of cells 43 are approximately diamond shaped. The fourth row of cells 44 is approximately a hexagonal structure. The hexagonal structure of the hexagonal structure enables the plugging support to be better in adaptability on the whole structure. Compared with a diamond structure, the hexagonal main rod is provided with the anchoring piece, so that the stability is better, and the anchoring performance after the release of the plugging support can be improved

Further, another aspect of the present application also provides an occlusion system, and the occlusion system of an embodiment includes the occlusion stent of any of the above embodiments. Further, the occlusion system also comprises a covering membrane covered on the occlusion stent. In one embodiment, the occlusion system may further comprise a delivery device coupled to the proximal end 10 of the occlusion stent for delivering the occlusion system to a predetermined location and releasing the occlusion system such that the occlusion system deploys into a deployed state, thereby causing the occlusion system to occlude the left atrial appendage of the patient.

In the expanded state of the occlusion system, the expansion range of the grid of the occlusion stent is gradually increased from the near end 10 to the far end 20, namely the grid close to the occlusion stent is smaller, so that the strength of the near end 10 of the occlusion stent is higher, and the support performance of the occlusion stent is ensured. And it is great to be close to the distal end 20 net of plugging system to make plugging support distal end 20 have better extensibility and deformability, make the plugging support have better compliance, make the art person cover most complicated type's auricle through choosing one type of plugging system for use, reduce the emergence probability of the circumstances such as the shoulder that exposes after the plugging system releases and residual hourglass when reducing complicated auricle operation degree of difficulty, improve the success rate of operation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the term "collapsed state" encompasses a state in which a fully collapsed state within a push sheath has been semi-released and semi-collapsed during delivery, and the term "expanded state" encompasses a state of expansion in a natural state or a state of use in a blood vessel. The term "mesh opening" refers to a closed area range which is used for plugging a grid in a stent body, wherein the area range can contain a small area range or the "mesh opening" excludes the small area range of the end part of the stent formed by folding and fixing the stent.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (16)

1. An occlusion stent, having opposite proximal and distal ends, the proximal end being a connector of a closed configuration, the distal end being an open configuration, the occlusion stent comprising at least two rows of cells along a direction from the proximal end to the distal end, the at least two rows of cells comprising a proximal row of cells adjacent to the proximal end and a distal row of cells adjacent to the distal end, the occlusion stent having a collapsed configuration in which the cells are closed and an expanded configuration in which the cells are expanded, the expanded range of the cells increasing along the direction from the proximal end to the distal end in the expanded configuration.

2. The occlusion stent of claim 1, wherein each row of the meshes comprises a plurality of mesh openings arranged along a circumferential direction of the occlusion stent in the deployed state, and an expansion range of the meshes is an area size of the mesh openings in the deployed state.

3. The occlusion stent of claim 2, wherein the occlusion stent comprises a plurality of primary struts, wherein at least one end of the primary struts is connected to two struts, wherein in the deployed state the primary struts and/or the struts define the mesh opening, wherein any of the primary struts is coplanar with a central axis of the occlusion stent, and wherein the struts form an included angle with a vertical plane passing through the central axis of the occlusion stent.

4. The occlusion stent of claim 3, wherein the primary struts have a width that is twice a width of the struts.

5. The occlusion stent of claim 2, wherein the mesh openings of the distal row of meshes are hexagonal.

6. The occlusion stent of claim 2, wherein the rod members of the proximal row of cells comprise a plurality of first main rods arranged at intervals circumferentially around the connecting member, one end of each first main rod is connected to the connecting member, the other end of each main rod is connected to two first struts, each of the two first struts is connected to another adjacent first strut, the two adjacent first main rods and the two connected first struts together define the mesh openings forming the proximal row of cells, and in the proximal row of cells, the two adjacent mesh openings share one first main rod.

7. The occlusion stent of claim 2, wherein the members of the distal row of cells comprise a plurality of second stems spaced apart along a circumferential direction of the occlusion stent, one end of the second stem is connected to two second struts, each of the two second struts is connected to another adjacent second strut, the other end of the second stem is connected to two third struts, each of the two third struts is connected to another adjacent third strut, the two connected second struts, the two adjacent second stems, and the two connected third struts together define the ports forming the distal row of cells, and in the distal row of cells, the two adjacent ports share one of the second stems.

8. The occlusion stent of claim 7, wherein the at least two rows of cells further comprise at least one intermediate row of cells between the proximal row of cells and the distal row of cells, the member defining one of the mesh openings in the intermediate row of cells comprising two fourth struts and two fifth struts, one end of the two fourth struts being connected, the other end of the two fourth struts being connected to one end of the two fifth struts in a one-to-one correspondence, the other ends of the two fifth struts being connected to each other; and in the middle row of grids in the same row, two fourth supporting rods for defining two adjacent net openings are connected, and two fifth supporting rods for defining two adjacent net openings are connected.

9. The occlusion stent of claim 6, wherein the mesh portals of the proximal row of meshes comprise a first expansion angle and a second expansion angle, the first expansion angle being an included angle between two adjacent primary stems, the first expansion angle being opposite the second expansion angle, the first expansion angle being 20 ° -35 °, the second expansion angle being 20 ° -60 °, and a distance from a vertex of the first expansion angle to a vertex of the second expansion angle being less than or equal to 1/3 of a distance from a vertex of the first expansion angle to a vertex of the distal row of meshes.

10. The occlusion stent of claim 7, further comprising an anchor disposed on the second primary shaft.

11. The occlusion stent of claim 10, wherein the anchor is angled from the second primary shaft, and the angled opening is toward the proximal end.

12. The occlusion stent of claim 11, wherein the anchor and the second stem define a V-like shape, and the second stem includes a circular arc that curves toward the anchor.

13. The occlusion stent of claim 11, wherein central axes of the anchor, the second primary stem, and the occlusion stent are coplanar.

14. The occlusion stent of claim 11, wherein the anchor is angled with respect to a vertical plane passing through a central axis of the second stem and the occlusion stent, the second stem comprising a curved section that curves away from the anchor.

15. The occlusion stent of claim 1, wherein in the deployed state, the occlusion stent has an equivalent diameter L and a distance from the proximal end to the distal end is L/2-1.5L.

16. An occlusion system comprising an occlusion stent of any of the preceding claims 1-15.

Images