CN120168051B - Thrombectomy stent - Google Patents
Thrombectomy stentInfo
- Publication number
- CN120168051B CN120168051B CN202510639612.3A CN202510639612A CN120168051B CN 120168051 B CN120168051 B CN 120168051B CN 202510639612 A CN202510639612 A CN 202510639612A CN 120168051 B CN120168051 B CN 120168051B
- Authority
- CN
- China
- Prior art keywords
- thrombus
- capture
- rod
- elastic component
- capture rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2217—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions single wire changing shape to a gripping configuration
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
本发明公开了一种取栓支架，包括镂空管状的支架主体和沿周向设置于支架主体外壁的血栓抓捕构件，支架主体具有径向收缩的收缩状态和径向扩张的扩张状态，在支架主体处于收缩状态下，血栓抓捕构件紧贴于支架主体外壁，在支架主体处于扩张状态下，血栓抓捕构件突出于支架主体外壁，血栓抓捕构件包括第一抓捕杆、第二抓捕杆和弹性部件，弹性部件连接在第一抓捕杆和第二抓捕杆之间，并被配置为能够产生形变以使得第一抓捕杆、第二抓捕杆及弹性部件三者与支架主体合围形成的血栓抓捕空间可变，如此确保了血栓抓捕构件始终能保持对血栓的良好抓捕能力，避免血栓脱落或未被捕获的情况发生。
The present invention discloses a thrombus removal stent, comprising a hollow tubular stent body and a thrombus capture component circumferentially arranged on the outer wall of the stent body, the stent body having a radially contracted state and a radially expanded state, when the stent body is in the contracted state, the thrombus capture component is tightly attached to the outer wall of the stent body, and when the stent body is in the expanded state, the thrombus capture component protrudes from the outer wall of the stent body, the thrombus capture component comprises a first capture rod, a second capture rod and an elastic component, the elastic component is connected between the first capture rod and the second capture rod, and is configured to be able to generate deformation so that the thrombus capture space formed by the first capture rod, the second capture rod and the elastic component and the stent body is variable, thereby ensuring that the thrombus capture component can always maintain a good capture ability for the thrombus, avoiding the thrombus from falling off or not being captured.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a thrombus taking support.
Background
The thrombus taking rack is one kind of medical instrument for treating ischemic cerebral apoplexy and other vascular obstructive diseases, and has the main use of conveying thrombus taking rack to thrombus site via minimally invasive operation, expanding the rack to embed and capture thrombus, and withdrawing the thrombus taking rack to remove thrombus from body to restore the vascular patency and normal blood flow.
Conventional thrombi removal stents are typically composed of only one hollow tubular stent body, and such designs tend to be difficult to effectively capture large or irregularly shaped thrombi. In order to improve the capturing effect, a modern thrombus-taking support is provided with thrombus capturing members which are circumferentially arranged on the outer wall of the support body, the thrombus capturing members are clung to the outer wall of the support body in a contracted state of the support body and are convenient to convey to a target position through a catheter, and in an expanded state of the support body, the thrombus capturing members protrude outwards from the outer wall of the support body and form thrombus capturing spaces so as to better contact and capture thrombus. However, because the thrombus capturing space is not changeable, after the thrombus is embedded into the thrombus capturing bracket and the thrombus capturing component captures the thrombus, part of the thrombus still cannot easily enter the thrombus capturing bracket through the thrombus capturing space in the process of withdrawing the thrombus capturing bracket, so that the thrombus is not completely captured, and the risk of operation failure is increased.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provide a thrombus taking support, which aims to ensure that a thrombus catching member can always keep good catching ability on thrombus and avoid the occurrence of the condition that the thrombus falls off or is not caught.
According to the invention, the thrombus capture support comprises a hollow tubular support body and a thrombus capture member arranged on the outer wall of the support body along the circumferential direction, wherein the support body is provided with a radially contracted shrinkage state and a radially expanded expansion state, the thrombus capture member is tightly attached to the outer wall of the support body when the support body is in the shrinkage state, the thrombus capture member protrudes out of the outer wall of the support body when the support body is in the expansion state, the thrombus capture member comprises a first capture rod, a second capture rod and an elastic component, and the elastic component is connected between the first capture rod and the second capture rod and is configured to deform so that a thrombus capture space formed by the first capture rod, the second capture rod and the elastic component and the support body in a surrounding manner is variable.
Further, the proximal ends of the first capturing rod and the second capturing rod are respectively connected to different parts of the bracket main body, and the distal ends of the first capturing rod and the second capturing rod are connected through elastic components.
Further, the first capturing rod and the second capturing rod extend in parallel in the axial direction and have the same length.
Further, the elastic member has a wavy structure capable of being deformed in the axial direction.
Further, the elastic component is integrally formed into a U-shaped profile, and two open ends of the elastic component are respectively connected with the distal ends of the first capturing rod and the second capturing rod.
Further, the wave intervals of the wavy structures are uniformly arranged.
Further, the wave spacing of the wavy structure is unevenly arranged, and the wave spacing close to the first capturing rod and the second capturing rod is larger than the wave spacing far away from the first capturing rod and the second capturing rod.
Further, the elastic component is provided with a plurality of catching hooks.
Further, the elastic component is in a wavy structure, and each catching hook is connected to a wavy structure concave part of the elastic component and bends towards the bracket main body.
Further, the catching hook comprises a hook body and a hook tip, wherein the hook body and the elastic component are positioned in the same plane, and the hook tip is bent inwards from the tail end of the hook body.
Compared with the prior art, the elastic component of the invention enables the thrombus catching space to be adjusted according to the actual size and shape of the thrombus, thereby ensuring that more thrombus is effectively caught, even if the elastic component can be dynamically expanded according to the pressure and shape of the thrombus in the process of withdrawing the thrombus taking support, the thrombus catching space is increased, and the thrombus smoothly enters the thrombus taking support to be caught, so that the thrombus catching member can always keep good catching capability of the thrombus, and the condition that the thrombus falls off or is not caught is avoided.
Drawings
The invention will be more fully understood and its attendant advantages and features will be more readily understood by reference to the following detailed description, taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic overall structure of a first embodiment of the present invention.
Fig. 2 is a schematic view of the structure of a thrombus-catching member and a catch hook in the second embodiment of the present invention.
Fig. 3 is a schematic view of a capturing hook in a second embodiment of the present invention.
In the drawing, 10 is a bracket main body, 20 is a thrombus catching member, 21 is a first catching rod, 22 is a second catching rod, 23 is an elastic component, 30 is a thrombus catching space, 40 is a catching hook, 41 is a hook body, and 42 is a hook tip.
It should be noted that the drawings are for illustrating the invention and are not to be construed as limiting the invention. Note that the drawings representing structures may not be drawn to scale. Also, in the drawings, the same or similar elements are denoted by the same or similar reference numerals.
Detailed Description
In order that the invention may be more readily understood, a detailed description of the invention is provided below along with specific embodiments and accompanying figures.
The terms "proximal" and "distal" in the sense of the present invention should be understood as meaning, viewed from the direction of the attending physician, the term "proximal" referring to the end proximal to the attending physician, i.e. corresponding to the "left end" referred to with reference to the accompanying drawings, and the term "distal" referring to the end distal to the attending physician, i.e. corresponding to the "right end" referred to with reference to the accompanying drawings. Similarly, "proximal segment" refers to a segment or a particular region proximal to the attending physician, and "distal segment" refers to a segment or a particular region distal to the attending physician.
First embodiment As shown in FIG. 1, the thrombectomy stent of the present embodiment comprises a stent body 10 and a plurality of thrombus-catching members 20 disposed around the outer wall of the stent body 10. The stent body 10 is in a hollow tubular structure, is formed by carving a metal tube such as a nickel titanium tube by laser and shaping the metal tube by heat treatment, and has a plurality of grids on the surface, and has a radially contracted state and a radially expanded state, wherein the two states respectively correspond to a non-thrombus taking state and a thrombus taking state. The plurality of thrombus-catching members 20 are circumferentially disposed on the outer wall of the stent body 10 and are substantially staggered to maximize the catching efficiency, and are dedicated to catching thrombus outside the stent body 10, and the thrombus-catching members 20 are integrally formed with the stent body 10, meaning that the entire thrombus-taking stent is cut from a single metal tube and manufactured through a heat setting process.
Specifically to each of the thrombus-capturing members 20, which are each connected to a corresponding mesh on the stent body 10. When the stent body 10 is in a contracted state, the thrombus-catching member 20 can be accommodated in the corresponding mesh and then is tightly attached to the outer wall of the stent body 10, the overall diameter is hardly increased, and the design is favorable for the thrombus-taking stent to smoothly pass through the catheter to reach the lesion. When the stent body 10 is in the expanded state, the thrombus-catching members 20 protrude outwardly from the corresponding mesh, thereby protruding from the outer wall of the stent body 10. Each thrombus-capturing member 20 comprises a first capturing lever 21, a second capturing lever 22 and an elastic member 23. Wherein, the first catching rod 21 and the second catching rod 22 are respectively connected with the outer wall of the bracket body 10, and the elastic part 23 is connected between the first catching rod 21 and the second catching rod 22. In this way, the first capturing rod 21, the second capturing rod 22, and the elastic member 23 form a thrombus capturing space 30 together with the stent body 10. Also, the elastic member 23 has a deformability, which allows the thrombus-catching space 30 to be changed. Therefore, in practical application, the elastic member 23 can be adjusted accordingly according to the actual size and shape of the thrombus, thereby ensuring that more thrombus can be effectively captured. Even in the process of withdrawing the thrombus taking support, the elastic component 23 can dynamically expand according to the pressure and shape of thrombus, so that the thrombus catching space is further increased, the thrombus can smoothly enter the inside of the thrombus taking support to be caught, and therefore, the thrombus catching member 20 can always keep good catching capability on the thrombus, and the condition that the thrombus falls off or is not caught is effectively avoided.
Specifically, during the transition of the stent body 10 from the contracted state to the expanded state within the blood vessel, an effective thrombus-catching space 30 is gradually formed as the thrombus-catching member 20 gradually protrudes from the outer wall of the stent body 10. Since the elastic member 23 is deformed, the thrombus-catching space 30 is adjusted in size accordingly so as to ensure that the thrombus is smoothly inserted into the stent body 10. After the thrombus is embedded, the elastic component 23 is affected by the withdrawing force in the process of withdrawing the thrombus-taking stent from the human body, and can be dynamically expanded according to the pressure and shape of the thrombus, so that the thrombus clamped on the thrombus-capturing space 30 can be smoothly embedded into the stent body 10.
In this embodiment, the proximal ends of the first capturing rod 21 and the second capturing rod 22 are respectively connected to different portions of the stent body 10, and the distal ends of the first capturing rod 21 and the second capturing rod 22 are connected by an elastic member 23. In addition, the first catching rod 21 and the second catching rod 22 extend in parallel in the axial direction, and the lengths of the two are kept identical. The elastic member 23 is formed in a wave-like structure capable of being deformed in the axial direction with the wave intervals uniformly set, and such a design enhances its adaptability to different forms of thrombus. The elastic member 23 is integrally formed as a U-shaped profile, and both open ends thereof are respectively connected to distal ends of the first catch lever 21 and the second catch lever 22, so that the first catch lever 21, the second catch lever 22 and the elastic member 23 are integrally formed as a U-shaped profile. Wherein the first capturing rod 21 and the second capturing rod 22 are arc-shaped rods, and distal end sections of the arc-shaped rods protrude outward relative to proximal end sections thereof. As such, the closed end of the U-profile thrombus-capturing member 20 formed by the first capturing lever 21, the second capturing lever 22 and the elastic member 23 protrudes outwardly with respect to the both open ends thereof in a direction perpendicular to the U-shaped plane. This unique design allows the thrombus-capture member 20 to better contact and effectively capture thrombus.
It will be appreciated that the wave spacing of the wave structure may also be in a non-uniform arrangement. For example, the wave spacing in the region close to the first and second catch bars 21, 22 may be set to be larger than the wave spacing in the region far from the first and second catch bars 21, 22. By such a design, the deformation of the elastic member 23 can be suppressed to a certain extent, and the occurrence of thrombus trapping failure due to an excessive deformation width can be prevented.
In the second embodiment, unlike the first embodiment, as shown in fig. 2 and 3, a plurality of catching hooks 40 are added to the elastic member 23. These catching hooks 40 are radially and alternately connected to the elastic member 23, and specifically, each catching hook 40 is connected to a wave structure recess of the elastic member 23 and bent toward the bracket body 10. In addition, any one of the catch hooks 40 is not coplanar with the thrombus-catching member 20 and the closed end of the elastic member 23, with its hook tip facing the stent body 10, and the projection on the stent body 10 is located in the corresponding mesh. The catching hook 40 mainly comprises a hook body 41 and a hook tip 42, wherein the hook body 41 and the elastic component 23 are positioned in the same plane, and the hook tip 42 is bent inwards from the tail end of the hook body 41, so that the whole catching hook 40 is not coplanar with the thrombus catching member 20 and the closed end of the elastic component 23. The design skillfully fills the gap which may occur between the closed end and the stent body 10, thereby further enhancing the capture capability of thrombus. The catch hook 40, particularly when facing relatively loose or smooth-surfaced thrombi, by virtue of its angle and tip design, is able to effectively "catch" these hard-to-catch thrombi. The present embodiment incorporates a catch hook 40 on the basis of the first embodiment, which results in a significant improvement in the capture capacity for a particular type of thrombus.
In order to further improve the catching effect, a through catching groove may be provided in the hook body 41 of the catching hook 40. The catching groove not only can increase friction force, but also can fix thrombus to a certain extent, and effectively prevent the thrombus from slipping.
Other structures of this embodiment are identical to those of the embodiment, and are not described herein.
It will be appreciated that although the invention has been described above in terms of preferred embodiments, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510639612.3A CN120168051B (en) | 2025-05-19 | 2025-05-19 | Thrombectomy stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510639612.3A CN120168051B (en) | 2025-05-19 | 2025-05-19 | Thrombectomy stent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN120168051A CN120168051A (en) | 2025-06-20 |
| CN120168051B true CN120168051B (en) | 2025-07-25 |
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ID=96030041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510639612.3A Active CN120168051B (en) | 2025-05-19 | 2025-05-19 | Thrombectomy stent |
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| Country | Link |
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| CN (1) | CN120168051B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113133804A (en) * | 2021-04-30 | 2021-07-20 | 杭州亿科医疗科技有限公司 | Thrombus-taking support |
| CN115500897A (en) * | 2022-11-16 | 2022-12-23 | 杭州亿科医疗科技有限公司 | Sectional type bolt taking device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010045367B4 (en) * | 2010-05-18 | 2019-08-08 | Acandis Gmbh | Medical device for removing concrements |
| ES2764752T3 (en) * | 2015-07-16 | 2020-06-04 | Perflow Medical Ltd | Vessel occlusion removal apparatus |
| CN109965942B (en) * | 2019-03-15 | 2022-05-27 | 伊索曼(中山)医疗器械有限公司 | Embolic obstruction retrieval device for blood vessels |
| CN113116462A (en) * | 2019-12-30 | 2021-07-16 | 杭州德诺脑神经医疗科技有限公司 | Thrombectomy support and thrombectomy system |
| CN113633343B (en) * | 2020-04-27 | 2023-05-02 | 先健科技(深圳)有限公司 | Thrombolysis device |
| CN111671495A (en) * | 2020-07-20 | 2020-09-18 | 广州创景医疗科技有限公司 | Barbed Bolt Retrieval Bracket with Enhanced Catch |
| CN114403980A (en) * | 2020-10-28 | 2022-04-29 | 上海加奇生物科技苏州有限公司 | Thrombus taking device |
| CN116138842B (en) * | 2022-07-19 | 2025-11-04 | 深圳佰特微医疗科技有限公司 | thrombectomy device |
-
2025
- 2025-05-19 CN CN202510639612.3A patent/CN120168051B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113133804A (en) * | 2021-04-30 | 2021-07-20 | 杭州亿科医疗科技有限公司 | Thrombus-taking support |
| CN115500897A (en) * | 2022-11-16 | 2022-12-23 | 杭州亿科医疗科技有限公司 | Sectional type bolt taking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120168051A (en) | 2025-06-20 |
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