CN119950136A - A tubular stent and a stent system comprising the same - Google Patents
A tubular stent and a stent system comprising the same Download PDFInfo
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- CN119950136A CN119950136A CN202311474907.7A CN202311474907A CN119950136A CN 119950136 A CN119950136 A CN 119950136A CN 202311474907 A CN202311474907 A CN 202311474907A CN 119950136 A CN119950136 A CN 119950136A
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Abstract
The present application relates to a tubular stent and a stent system comprising the same. The tubular bracket comprises a hollow cylindrical bracket main body, wherein the bracket main body is provided with a hollowed grid, the bracket main body is provided with a bracket free end which extends along the axial direction and is integrally designed with the bracket main body, the bracket free end is positioned between the proximal end and the distal end of the bracket main body, and the proximal end of the bracket auxiliary rod is connected with the bracket free end, and the distal end of the bracket auxiliary rod extends into the bracket main body. According to the tubular stent, the free end of the stent is arranged, the stent auxiliary rod is arranged at the far end of the free end of the stent, a functional mechanism is provided for the tubular stent, and meanwhile, the free end and the stent auxiliary rod are arranged, so that the joint of the free end of the stent and the stent auxiliary rod is provided with a space for deforming into the cavity of the tubular stent, the conveying resistance is not increased due to the arrangement of the functional mechanism, and the damage risk to blood vessels is not increased due to the arrangement of the functional mechanism.
Description
Technical Field
The invention belongs to the field of vascular stents, and particularly relates to a tubular stent and a stent system comprising the tubular stent.
Background
The nerve intervention is to diagnose and treat the lesions which involve the human nervous vascular system by adopting the intravascular catheter operation technology under the support of a Digital Subtraction Angiography (DSA) system through specific methods such as selective radiography, interventional embolism, dilation forming, mechanical clearing, drug delivery and the like. According to different functions and application ranges, the neuro-interventional medical devices can be divided into three categories, namely hemorrhagic stroke treatment, ischemic stroke treatment and access. Wherein, the hemorrhagic cerebral apoplexy treatment product is mainly used for treating intracranial aneurysm and plugging malformed blood vessels, and the ischemic cerebral apoplexy treatment product is mainly used for treating acute ischemic cerebral apoplexy and cerebral vascular occlusive diseases (such as intracranial atherosclerosis diseases, etc.). Various self-expanding stents have been developed for the treatment of neurovascular disorders, such as blood flow-directed dense mesh stents, coil-assist stents, intracranial thrombolysis stents, intracranial stents, and the like.
In clinical applications, the visibility (also called radiopacity) of the tubular stent is important to ensure that the clinician deploys the device in the correct position for medical purposes such as capturing a thrombus or dilating a blood vessel. Conventional stents are typically made of nickel titanium alloys that are not sufficiently radiopaque to meet the needs of clinical applications. Thus, for tubular stents, radiopaque or other functional mechanisms are often provided on the tubular stent for added visibility or other functionality, and the provision of such mechanisms tends to affect the smoothness of the outer surface of the tubular stent. If the radiopaque mechanism is arranged on the stent body of the tubular stent, the bulge of the strut is caused compared with that of the stent body, so that on one hand, the resistance of the tubular stent during delivery is increased, and on the other hand, the added functional mechanism also protrudes out of the strut of the stent body in an expanded state, so that the damage to the vessel wall is caused, and particularly for tortuous vessels, the tubular stent is more easy to damage the vessel wall.
Therefore, how to safely arrange the functional mechanism on the tubular stent, not only can ensure the realization of corresponding functions (such as developing functions), but also can reduce the damage of the tubular stent to the vascular wall, and is a technical problem to be solved in the field.
Disclosure of Invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide a tubular stent comprising:
The hollow cylindrical stent body is provided with a hollowed grid, and the stent body is provided with a stent free end which extends along the axial direction and is integrally designed with the stent body;
And the proximal end of the bracket auxiliary rod is connected with the free end of the bracket, and the distal end of the bracket auxiliary rod extends into the bracket main body.
The tubular stent provided by the application solves the problems in the prior art by arranging the free end of the stent and arranging the auxiliary stent rod at the far end of the free end of the stent, in particular, the auxiliary stent rod can be provided with a functional mechanism, such as an auxiliary stent rod made of radio-opaque material, so as to provide a developing function, the free end of the stent is connected with the auxiliary stent rod, the auxiliary stent rod extends into the stent main body, the free end of the stent can be limited to extend or stretch towards the outer side of the body cavity wall of the stent, especially when the free end of the stent is arranged in a blood vessel with a bent shape, the auxiliary stent rod can be limited to extend towards the outer side of the cavity of the tubular stent, so that the damage to the blood vessel wall can be avoided, and on the other hand, under the combined action of the free end of the stent and the auxiliary stent rod, the connecting position of the auxiliary stent rod and the free end of the tubular stent is provided with a space which is offset towards the inner cavity when the inner cavity is encountered, the offset space can reduce the damage to the blood vessel wall of the tubular stent and reduce the resistance when the tubular stent is pushed in a delivery catheter.
Preferably, the length of the free end of the stent is less than the length from the proximal end of the free end of the stent to the distal end of the mesh in which it is located.
The length of the free end of the support is overlong, if the length exceeds the length of the far end of the grid where the free end of the support is located, the condition that the connection position of the free end of the support and the auxiliary rod of the support is overlapped with the supporting rod of the grid easily occurs, and the pushing resistance of the tubular support in the conveying catheter can be increased.
Preferably, the length of the free end of the stent is less than 1/2 of the length of the proximal end of the free end of the stent to the distal end of the mesh where it is located, preferably the length of the free end of the stent is less than 1/4 of the length of the proximal end of the free end of the stent to the distal end of the mesh where it is located.
The longer the free end of the tubular stent, the shorter the length of the stent auxiliary rod, and the corresponding functionality (e.g., development) is reduced.
Furthermore, the length of the free end of the stent is preferably greater than or equal to 1/10 of the length of the proximal end of the free end of the stent to the distal end of the mesh in which it is located.
The length of the free end of the support is shorter, the radial deformation of the free end of the support is smaller, and after the auxiliary rod of the support is connected, the deformation space of the connecting position in the cavity of the tubular support is smaller, and the connecting position is easier to protrude out of the inner cavity of the tubular support.
Preferably, the distal ends of the stent auxiliary rods converge and the convergence point is located on the stent body central axis.
The distal ends of the support auxiliary rods converge, so that the free ends of the supports can be more effectively limited in the cavity of the tubular support, and particularly the convergence point is positioned on the central shaft of the support main body, and all the axially distributed free ends of the supports can be better limited.
Preferably, the included angles of the distal ends of the adjacent support auxiliary rods are the same, and the included angles of the distal ends of the support auxiliary rods and the central shaft of the support main body are the same.
The included angles of the distal ends of the adjacent support auxiliary rods are the same, so that the support auxiliary rods can be well distributed uniformly in the circumferential direction, and the tubular support can be well developed. On the other hand, the included angles of the distal ends of the adjacent support auxiliary rods are the same, so that the support free ends which are positioned near the same circumference are connected through interaction of the support auxiliary rods, the support free ends are better guaranteed not to extend out of the tubular support cavity due to bending of the support, and meanwhile excessive deformation caused by different recovery angles during recovery of the support is avoided.
Preferably, an included angle between the bracket auxiliary rod and the central shaft is 30-80 degrees, for example 42 degrees, 45 degrees, 48 degrees, 53 degrees, 55 degrees, 58 degrees, 64 degrees, 65 degrees, 69 degrees, 73 degrees, 77 degrees, 79 degrees and the like.
The support auxiliary rod and the central shaft have a certain angle, so that the radial supporting force of the tubular support can be supplemented on the premise of not influencing the compliance of the tubular support in a tortuous blood vessel, if the included angle is too small, the radial supporting force is not obviously increased, if the included angle is too large, the cavity wall supporting force of the tubular support is too large, the recovery smoothness of the tubular support is influenced by the thrombus taking support, and the intracranial support is easy to cause stimulation to the blood vessel wall and increase the risk of complications. The included angle between the support auxiliary rod and the central shaft is an included angle between the support auxiliary rod and the central shaft extending towards the proximal end, wherein the distal end point of the support auxiliary rod is an angular vertex.
Preferably, the stent-auxiliary rod has a bent shape that extends a distal end of the stent-auxiliary rod toward the central shaft.
The support auxiliary rod is provided with a bent structure, so that the firmness of convergence of the distal ends of the support auxiliary rod can be improved, and the supplement of the radial supporting force to the tubular support is improved. The bending of the support auxiliary rod can be achieved through pre-shaping.
As an alternative embodiment, the bracket auxiliary rod includes a parallel section parallel to the central axis, and an inclined section having a distal end approaching the central axis.
Preferably, the connection form of the support auxiliary rod and the free end is rigid connection or flexible connection.
Further preferably, the connection mode of the support auxiliary rod and the free end of the support comprises any one or a combination of at least two of fixed sleeve connection, welding, bonding or clamping.
As an alternative embodiment, the stent auxiliary rod with distal ends converging together is defined as stent auxiliary units, the number of which is 1 or more in the axial direction of the stent body, and which are disposed near the bisecting point of the distance between the proximal and distal ends of the stent body.
That is, the stent auxiliary units of the application are uniformly distributed along the axial direction, and the arrangement can provide better radial support for the tubular stent body, and can better perform sectional development on the tubular stent, better position the tubular stent and determine the trend of the tubular stent when the stent auxiliary rod has development performance.
Preferably, the distal end of the free end of the stent has a cross section perpendicular to the axial direction that is longer in the circumferential direction than in the axial direction.
The distal section of the free end of the stent according to the present application is arranged flat, and the circumferential length of the section along the tubular stent is longer than the radial length along the tubular stent, which is more advantageous for connection with the stent auxiliary rod.
Preferably, the proximal end of the free end of the bracket is located at grid intersections of the hollowed-out grid.
The hollowed-out grid is formed by connecting the support columns end to end, more than three support columns in the middle of the support body are converged at grid intersection points, the proximal end of the free end of the support is arranged at the grid intersection points, and the grid intersection points of the proximal end with the free end of the support are free end intersection points.
In a preferred embodiment, the free end intersection points converge only three of the struts.
Preferably, the distal ends of the stent auxiliary stems converge and a radiopaque mechanism, preferably a radiopaque ring or coil, is provided at the convergence.
Preferably, the distal end of the stent body is provided with a radiopaque device.
Another object of the present application is to provide a stent system, wherein the stent system comprises:
a tubular stent according to one of the objects;
a push wire connected to the proximal end of the tubular stent;
a catheter for delivering the tubular stent.
Compared with the prior art, the application has the following beneficial effects:
According to the tubular stent, the free end of the stent is arranged, the stent auxiliary rod is arranged at the far end of the free end of the stent, a functional mechanism is provided for the tubular stent, and meanwhile, the free end and the stent auxiliary rod are arranged, so that the joint of the free end of the stent and the stent auxiliary rod is provided with a space for deforming into the cavity of the tubular stent, the conveying resistance is not increased due to the arrangement of the functional mechanism, and the damage risk to blood vessels is not increased due to the arrangement of the functional mechanism.
Drawings
FIG. 1 is a schematic view of the tubular stent of example 1 in a tiled deployment;
fig. 2 is a schematic perspective view of a tubular stent according to embodiment 1;
FIG. 3 is an enlarged schematic view of the structure within the dashed line box of FIG. 1;
Fig. 4 is a schematic perspective view of a stent auxiliary rod 200 of the tubular stent provided in embodiment 1;
fig. 5 is a right side view of the stent auxiliary rod 200 of the tubular stent provided in embodiment 1;
FIG. 6 is a schematic cross-sectional view of the free end of the tubular stent at the junction of the tubular stent provided in example 1;
FIG. 7 is a schematic view showing the deployment of the tubular stent of example 2;
FIG. 8 is a schematic view showing the deployment of the tubular stent of example 3;
fig. 9 is a schematic view showing the structure of a stent auxiliary unit 200 of the tubular stent provided in embodiment 3 from a distal end;
fig. 10 is a schematic structural view of the tubular stent provided in embodiment 4.
Detailed Description
The following description of the present invention will further illustrate the technical solution of the present invention in conjunction with the specific embodiments, but should be construed as merely embodying the spirit and explanation of the technical solution of the present invention, and should not be construed as limiting the scope of the present invention.
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
In the description of the present application, it is to be understood that the terms "distal" and "proximal" herein are to be understood as meaning, as viewed from the direction of the operator, "distal" being the end remote from the operator and "proximal" being the end close to the operator. The term "axial" should be understood herein as the direction of stent pushing, the length of the guidewire or the length of the stent, and "radial" should be understood as the perpendicular direction to the "axial".
In the description of the present application, it should be noted that, without conflict, embodiments of the present application and features of the embodiments may be combined with each other.
Example 1
As shown in fig. 1 to 4 (fig. 1 is a schematic view of a tubular stent according to embodiment 1 in a flat-laid and open manner, fig. 2 is a schematic view of a tubular stent according to embodiment 1 in a three-dimensional structure, fig. 3 is a schematic view of an enlarged structure within a dashed frame in fig. 1, fig. 4 is a schematic view of a stent auxiliary rod 200 of a tubular stent according to embodiment 1 in a three-dimensional structure, fig. 5 is a schematic view of a right-side view of a stent auxiliary rod 200 of a tubular stent according to embodiment 1 in a three-dimensional structure, fig. 6 is a schematic view of a cross-sectional structure of a stent free end at a joint of a tubular stent according to embodiment 1), embodiment 1 provides a tubular stent comprising:
The hollow cylindrical stent body 100 is divided into a proximal end part (10), a middle part 20 and a distal end part (30) along the axial direction, the stent body is provided with a hollow grid, the hollow grid is provided with a plurality of arranged hollow structures 110, each hollow structure is formed by connecting at least 4 (such as 4, 5 and 6) struts 111 end to end, the ends of the struts 111 intersect at an intersection point, a stent free end 120 is selectively arranged at the intersection point in the middle part 20 of the stent body, the intersection point at which the stent free end 120 is arranged is a second intersection point 113, the intersection point at which the stent free end 120 is not arranged is a first intersection point 112, the second intersection point 113 is only intersected by 3 struts 111, the third intersection point 114 is arranged in the same hollow structure 110 with the second intersection point 113, the third intersection point 114 is intersected by only three struts 111, two intersection points are arranged between the third intersection point 114 and the second intersection point 113, and the stent free end 120 and the stent body are integrally engraved (namely the integral design). The middle portion 20 of the stent body 100 is provided with a set of stent free ends that are provided with 3 stent free ends 120.
The length of the free end 120 of the bracket is a, the distance between the free end 120 of the bracket and the intersection point of the farthest end of the hollow structure 110 is B, A and B satisfy that A is less than or equal to 1/2B, preferably less than or equal to 1/4B, and preferably A and B also satisfy that A is more than or equal to 1/10B.
The tubular stent further comprises a stent auxiliary unit 200, wherein the stent auxiliary unit 200 is provided with 3 stent auxiliary rods 210, the proximal ends of the 3 stent auxiliary rods 210 are respectively connected with 3 stent free ends 120 in a set of stent free ends, the distal ends of the 3 stent auxiliary rods 210 intersect at an aggregation point 220, and the aggregation point 220 is positioned on a central shaft 300 of the tubular stent body. The stent auxiliary rod 210 includes a proximal parallel section 211 and a distal inclined section 212, and the greater the angle between the proximal parallel section 211 and the distal inclined section 212, the smaller the angle α between the distal end of the stent auxiliary rod 210 (i.e., the inclined section 212) and the stent body central axis 300. The angle α described in example 1 is 66 °. The distal ends of the 3 stent auxiliary rods 210 in the stent auxiliary unit 200 are all at the same angle with the stent body central axis 300.
Along the length direction of the tubular stent, only one stent auxiliary unit 200 is provided, the proximal ends of the three stent free ends 120 connected with the three stent auxiliary rods 210 of the stent auxiliary unit 200 may be located in the same circumference or different circumferences, the proximal ends of the stent auxiliary rods 210 of the same stent auxiliary unit 200 may be located in the same circumference or different circumferences, and the intersection points of the proximal parallel sections 211 and the distal inclined sections 212 of the stent auxiliary rods of the same stent auxiliary unit 200 are located in the same circumference.
Of the three stent auxiliary rods 210 in the stent auxiliary unit 200, the distal ends of two adjacent stent auxiliary rods 210 have the same included angle. In embodiment 1, the included angle β 1、β2、β3 of the projection of the distal end of the stent auxiliary rod 210 on the cross section perpendicular to the central axis 300 of the tubular stent body is about 120 °.
In other embodiments, the included angle α between the distal end of the auxiliary stent rod and the central stent body axis 300 may be 43 °, 50 °, 55 °, etc.
The connection mode of the proximal end of the auxiliary stent rod 210 and the connection 130 of the free end 120 of the stent is a rigid fixed connection, and the proximal end of the auxiliary stent rod 210 and the distal end of the free end 120 of the stent are fixed by filling the adhesive substance 132 after the fixing metal ring 131 is sleeved.
In a preferred embodiment, the distal end of the auxiliary stent rod 210 has a rectangular cross section, and the circumferential length L 1 is greater than the length L 2 perpendicular to the axial direction.
In other embodiments, the connection between the proximal end of the auxiliary bracket rod 210 and the connection 130 of the free bracket end 120 may be welded, clamped or directly bonded.
The material of the stent auxiliary unit 200 is entirely radio-opaque. In other embodiments, the stent support shaft 210 or the convergence 220 of the stent support unit 200 may be optionally selected to be wholly or partially or non-radiopaque, preferably with one of the mechanisms in the stent support shaft 210 or the convergence 220. In other embodiments, the radiopaque material may also be provided on the stent auxiliary unit by means of attachment, such as, for example, C-ring snap-fit, wrapping, etc.
The angle and the angle described in the present application are the same as those allowed by the machining precision, that is, the error due to the machining precision is allowed.
Example 2
As shown in fig. 7 (fig. 7 is a schematic view showing a tubular stent in a spread out manner provided in embodiment 2), embodiment 2 provides a tubular stent comprising:
The hollow cylindrical stent body 100 is axially divided into a proximal end portion (not shown in fig. 7), a middle portion 20 and a distal end portion (not shown in fig. 7), the stent body is provided with a hollow grid, the hollow grid is provided with a plurality of arranged hollow structures 110, each hollow structure is formed by connecting at least 4 (such as 4, 5 and 6) struts 111 end to end, the ends of the struts 111 intersect at an intersection point, the middle portion 20 of the stent body is provided with the ends of the 4 struts 111, the intersection point is optionally provided with a stent free end 120, the intersection point where the stent free end 120 is provided is a fourth intersection point 115, the intersection point where the stent free end 120 is not provided is a first intersection point 112, and the stent free end 120 and the stent body are integrally engraved (i.e. integrally designed). The middle portion 20 of the stent body 100 is provided with at least 3 stent free ends 120.
The tubular stent further includes a stent auxiliary unit 200, and the stent auxiliary unit 200 is provided in the same manner as in embodiment 1.
Example 3
As shown in fig. 8 to 9 (fig. 8 is a schematic view of the tubular stent in the embodiment 3 in a lay-up and deployment manner, fig. 9 is a schematic view of the stent auxiliary unit 200 of the tubular stent in the embodiment 3 from a distal end perspective), embodiment 3 provides a tubular stent comprising:
The hollow cylindrical stent body 100 is axially divided into a proximal end portion (not shown in fig. 8), a middle portion 20 and a distal end portion (not shown in fig. 8), the stent body has a hollow grid, the hollow grid has a plurality of arranged hollow structures 110, each hollow structure is formed by connecting at least 4 (such as 4, 5 and 6) struts 111 end to end, at least part of the struts 111 is provided with a stent free end 120, and the stent free end 120 and the stent body are integrally engraved (i.e. integrally designed). The middle portion 20 of the stent body 100 is provided with at least 4 stent free ends 120.
The tubular stent further comprises a stent auxiliary unit 200, wherein the stent auxiliary unit 200 is provided with 4 stent auxiliary rods 210, the proximal ends of the 4 stent auxiliary rods 210 are respectively connected with 4 stent free ends 120, the distal ends of the 4 stent auxiliary rods 210 intersect at an convergence point 220, and the convergence point 220 is positioned on the central axis 300 of the tubular stent main body. The stent auxiliary rod 210 includes a proximal parallel section 211 and a distal angled section 212. The distal end of the stent auxiliary rod 210 in embodiment 3 is inclined at an angle α of 50 ° with respect to the central axis 300 of the stent body. The distal ends of the 4 stent auxiliary rods 210 in the stent auxiliary unit 200 are all at the same angle with the stent body central axis 300.
Along the length direction of the tubular stent, only one stent auxiliary unit 200 is provided, the proximal ends of the 4 stent free ends 120 connected with the 4 stent auxiliary rods 210 of the stent auxiliary unit 200 may be located in the same circumference or different circumferences, the proximal ends of the stent auxiliary rods 210 of the same stent auxiliary unit 200 may be located in the same circumference or different circumferences, and the intersection points of the proximal parallel sections 211 and the distal inclined sections 212 of the stent auxiliary rods of the same stent auxiliary unit 200 are located in the same circumference.
Of the 4 stent auxiliary rods 210 in the stent auxiliary unit 200, the distal ends of two adjacent stent auxiliary rods 210 have the same included angle. In embodiment 3, the included angles of the projection of the distal end of the stent auxiliary rod 210 on the cross section perpendicular to the central axis 300 of the tubular stent body are all about 90 °.
In other embodiments, the number of the stent auxiliary rods 210 in one stent auxiliary unit 200 is n, n is greater than or equal to 2, n is an integer, and may be 3, 4, 5, 6, 7, 8, etc., where the included angles between the distal ends of the n stent auxiliary rods 210 in the stent auxiliary unit 200 and the central axis 300 of the stent main body are the same, and the included angles between the projection of the distal ends of the stent auxiliary rods 210 on the cross section perpendicular to the central axis 300 of the tubular stent main body are all about 360 °/n.
Example 4
As shown in fig. 10 (fig. 10 is a schematic view of the structure of the tubular stent provided in embodiment 4), embodiment 4 provides a tubular stent having a hollow cylindrical body 100 with the same structure as that of embodiment 1, except that the middle portion 20 of the stent body 100 is provided with two sets of stent free ends, a first set of stent free ends 141 and a second set of stent free ends 142, each of which is independently provided with 3 stent free ends 120.
The tubular stent further comprises two stent auxiliary units, a first stent auxiliary unit 201 and a second stent auxiliary unit 202, each of which has the same structure as that of embodiment 1, and the difference is that the connection modes of the first stent auxiliary unit 201 and the second stent auxiliary unit 202 and the stent main body are adaptively adjusted, specifically, the first stent free end set 141 is connected with the first stent auxiliary unit 201, and the second stent free end set 142 is connected with the second stent auxiliary unit 202, and the specific connection mode is the same as that of embodiment 1.
In embodiment 4, the first stent auxiliary unit 201 and the second stent auxiliary unit 202 are disposed near 1/3 and 2/3 of the bisecting point of the distance between the proximal end and the distal end of the stent body in the axial direction of the stent body.
It should be noted that only two support auxiliary rods 210 are visible in the support auxiliary unit in fig. 10, because of the problem of the view angle in fig. 10, one support auxiliary rod 210 is blocked, and the reason that it cannot be shown in the view is that.
In a specific embodiment of the present application, there is also provided a stent system comprising:
The tubular stent of any one of embodiments 1-3;
a pushing wire fixedly connected with the proximal end of the tubular support;
And a catheter for delivering the tubular stent.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (16)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311474907.7A CN119950136B (en) | 2023-11-07 | 2023-11-07 | A tubular stent and a stent system comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311474907.7A CN119950136B (en) | 2023-11-07 | 2023-11-07 | A tubular stent and a stent system comprising the same |
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| CN119950136A true CN119950136A (en) | 2025-05-09 |
| CN119950136B CN119950136B (en) | 2025-10-10 |
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| US20030050688A1 (en) * | 2001-09-13 | 2003-03-13 | Fischell David R. | Stent with angulated struts |
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| CN114569305A (en) * | 2020-12-01 | 2022-06-03 | 浙江归创医疗器械有限公司 | Tubular stent |
| CN115120394A (en) * | 2022-05-13 | 2022-09-30 | 北京迎兴医疗科技有限公司 | Recoverable aneurysm auxiliary stent and delivery system |
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2023
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030050688A1 (en) * | 2001-09-13 | 2003-03-13 | Fischell David R. | Stent with angulated struts |
| CN111246811A (en) * | 2017-10-16 | 2020-06-05 | 上海沃比医疗科技有限公司 | Device and method for treating vascular occlusion |
| US20200297364A1 (en) * | 2017-10-16 | 2020-09-24 | Shanghai Wallaby Medical Technologies Co., Inc. | Devices and methods for treating blocked blood vessels |
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| CN113599034A (en) * | 2020-05-30 | 2021-11-05 | 杭州德诺脑神经医疗科技有限公司 | Thrombectomy support and thrombectomy system |
| CN213552145U (en) * | 2020-10-28 | 2021-06-29 | 上海加奇生物科技苏州有限公司 | Thrombus taking device |
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| CN115120394A (en) * | 2022-05-13 | 2022-09-30 | 北京迎兴医疗科技有限公司 | Recoverable aneurysm auxiliary stent and delivery system |
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| CN119950136B (en) | 2025-10-10 |
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