Multi-position developing thrombectomy stent
By providing multiple developing components in the thrombus removal stent, the problem of insufficient scraping or leakage of thrombus caused by the self-expanding stent is solved, and sufficient scraping and safe thrombus removal are achieved.
Patent Information
- Application Number
- CN202422485262.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-10-14
AI Technical Summary
Existing self-expanding stents may cause problems such as insufficient thrombus scraping or leakage during mechanical thrombectomy.
A multi-position developing thrombus removal stent is designed. By setting multiple developing parts on the stent conveyor and the basket guide wire, the relative position between the stent and the basket body is ensured to be accurate, so that the thrombus can be fully scraped and leakage can be prevented.
It improves the reliability and safety of thrombectomy, ensures that the thrombus is fully scraped and effectively prevents leakage, and improves the thrombectomy effect.
Smart Images
Figure CN223438598U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of medical devices, and particularly relates to a thrombus extraction stent with multi-position visualization. BACKGROUND
[0002] With the improvement of living conditions, the incidence of cardiovascular and cerebrovascular diseases is increasing, and stroke is a kind of cardiovascular and cerebrovascular disease, and the treatment methods mainly include thrombolytic therapy and mechanical thrombus extraction therapy. In mechanical thrombus extraction therapy, the thrombus extraction instrument usually needs to reach the occluded position through the blood vessel, then pass through the occluded blood vessel, and then take out the thrombus through the thrombus extraction instrument or the catheter. Some thrombus extraction instruments use self-expanding stents for thrombus extraction. In actual operation, the self-expanding stent may not be fully in place, resulting in insufficient thrombus scraping or leakage. CONTENT OF THE UTILITY MODEL
[0003] The application aims to provide a thrombus extraction stent with multi-position visualization, which can facilitate the phase positioning between the components in the thrombus extraction stent, assist in improving the operation reliability of the thrombus extraction stent, and effectively overcome the problems of insufficient thrombus scraping or leakage.
[0004] In order to solve the above technical problems, the application is implemented as follows:
[0005] The application embodiment provides a thrombus extraction stent with multi-position visualization, which comprises:
[0006] The stent delivery device comprises a recovery stent, a stent traction member connected to the first end of the recovery stent, and a first visualization member arranged at the second end of the recovery stent. The recovery stent has a receiving cavity, and the receiving cavity is in communication with the outside through a first opening located at the end face of the second end of the recovery stent.
[0007] The basket guide wire comprises a basket core wire, a second visualization member, a basket main body, and a third visualization member. The second visualization member, the basket main body, and the third visualization member are sequentially connected to the basket core wire in the length extension direction of the basket core wire.
[0008] The basket guide wire is in sliding connection with the stent delivery device. When the second visualization member is aligned with the first visualization member, the basket main body is located outside the receiving cavity. When the third visualization member is aligned with the first visualization member, the basket main body is located inside the receiving cavity.
[0009] The multi-position developing thrombus taking stent provided by the embodiment of the application comprises a stent conveyor and a basket guide wire, the relative position between the recovered stent of the stent conveyor and the basket main body of the basket guide wire can be accurately determined through the arrangement of the first developing element, the second developing element and the third developing element, which helps the operator to fully scrape the thrombus into the accommodating cavity of the recovered stent through the basket main body and effectively prevent the thrombus from leaking from the accommodating cavity, in combination with the stent traction element and the basket core wire, the recovered stent, the basket main body and the thrombus can be taken out together, and the thrombus taking effect is improved.
[0010] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the application. BRIEF DESCRIPTION OF DRAWINGS
[0011] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:
[0012] Figure 1 is a structural schematic diagram of a multi-position developing thrombus taking stent provided by the embodiment of the application;
[0013] Figure 2 is a structural schematic diagram of a stent conveyor in the embodiment of the application;
[0014] Figure 3 is a structural schematic diagram of a basket guide wire in the embodiment of the application;
[0015] Figure 4 is a partial structural schematic diagram of the stent conveyor when the recovered stent is in a released state;
[0016] Figure 5 is a partial structural schematic diagram of the stent conveyor when the recovered stent is in a contracted state;
[0017] Figure 6 is a partial structural schematic diagram of the basket guide wire.
[0018] Reference Signs:
[0019] 100-stent conveyor, 110-recovered stent, 120-stent traction element, 121-stent outer tube, 122-stent inner tube, 131-first developing element, 132-fourth developing element, 133-fifth developing element, 141-outer tube connecting element, 142-inner tube connecting element, 200-basket guide wire, 210-basket core wire, 220-basket main body, 231-second developing element, 232-third developing element, 233-sixth developing element. DETAILED DESCRIPTION
[0020] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0021] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.
[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0023] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0024] like Figures 1 to 6 As shown, according to some embodiments of the present application, a multi-position visualization thrombus removal stent includes:
[0025] The stent conveyor 100 includes a recovery stent 110, a stent pulling member 120 connected to a first end of the recovery stent 110, and a first developing member 131 disposed at a second end of the recovery stent 110. The recovery stent 110 has a receiving chamber, which communicates with the outside through a first opening located on an end surface of the second end of the recovery stent 110.
[0026] The basket guide wire 200 includes a basket core wire 210, a second developing member 231, a basket body 220, and a third developing member 232, which are sequentially connected to the basket core wire 210 in the length extension direction of the basket core wire 210;
[0027] The basket guide wire 200 is in sliding connection with the stent delivery device 100, and the basket body 220 is located outside the accommodating cavity when the second developing member 231 is aligned with the first developing member 131, and the basket body 220 is located inside the accommodating cavity when the third developing member 232 is aligned with the first developing member 131.
[0028] In the embodiment, the stent delivery device 100 includes a recovery stent 110, and the recovery stent 110 is provided with an accommodating cavity which is in communication with the outside through a first opening in the end face of the second end of the recovery stent 110. For the convenience of description, the positions of the proximal end and the distal end can be defined with respect to the position of the operator during the use of the multi-position developing stent (hereinafter referred to as the stent), and the end face of the second end of the recovery stent 110 can be the end face of the distal end of the recovery stent 110.
[0029] The basket guide wire 200 is in sliding connection with the stent delivery device 100, and the basket body 220 can enter or exit the accommodating cavity from the first opening during the sliding process relative to the stent delivery device 100. In actual application, the basket body 220 can be guided to the distal end of the thrombus through a catheter (not shown in the figure) and the like, and the recovery stent 110 can be guided to the proximal end of the thrombus along the basket core wire 210, and the first opening is directed to the thrombus, at this time, the basket body 220 is located outside the accommodating cavity. The operator can operate the basket core wire 210 to move the basket body 220 towards the accommodating cavity, scrape the thrombus, until the basket body 220 and the thrombus enter the accommodating cavity, at this time, the basket body 220 can block the first opening to a certain extent, so as to avoid the leakage of the thrombus from the accommodating cavity. In actual operation, the operator can move the basket body 220 back and forth by operating the basket core wire 210, so that the thrombus can be fully scraped.
[0030] The first end of the recovery stent 110, i.e. the proximal end of the recovery stent 110, is connected with a stent traction member 120, and in the case of scraping the thrombus into the accommodating cavity, the operator can operate the stent traction member 120 and the basket core wire 210 to move the recovery stent 110 and the basket body 220 as a whole towards the proximal end, until the thrombus removal operation is completed.
[0031] In the above thrombus extraction process, the accurate determination of the relative position between the basket body 220 and the recovery stent 110 has an important influence on the full scraping of the thrombus and the prevention of leakage. In the present embodiment, a first developing member 131 is arranged on the second end of the recovery stent 110, i.e. the distal end of the recovery stent 110, and a second developing member 231 and a third developing member 232 are arranged on the basket core wire 210, and the second developing member 231 and the third developing member 232 can be located on the proximal side and the distal side of the basket body 220 respectively.
[0032] The materials and shapes of the first developing member 131, the second developing member 231 and the third developing member 232 are not specifically limited here, and generally, these developing members can be used for X-ray development. In some examples, the above developing members can be developing rings, developing blocks or developing coiled springs, and the connection mode of the developing members and the attachment members, such as the recovery stent 110 or the basket core wire 210, can be riveting, clamping or bonding, etc., which are not specifically limited here. In one example, the first developing member 131 and the second developing member 231 can be developing rings, and the third developing member 232 can be a developing coiled spring. Through these developing members, the thrombus extraction stent can be developed in multiple positions during use.
[0033] By observing the relative positions between the developing members under X-ray, the relative position between the basket body 220 and the recovery stent 110 can be determined more accurately. For example, when the first developing member 131 is aligned with the second developing member 231, the proximal end of the basket body 220 and the distal end of the recovery stent 110 are basically located at the same depth position, indicating that the basket body 220 is located outside the accommodation cavity; and when the first developing member 131 is aligned with the third developing member 232, the distal end of the basket body 220 and the distal end of the recovery stent 110 are basically located at the same depth position, indicating that the basket body 220 is located inside the accommodation cavity.
[0034] In some examples, the alignment between different two developing members can mean that the developing of these two developing members under X-ray coincides with each other, or the positions of the developing members in the length extension direction of the stent delivery device 100 or the basket guide wire 200 are the same or basically the same, etc.
[0035] The stent taking support provided by the embodiment of the application comprises a stent conveyor 100 and a basket guide wire 200. The relative positions between the recovered stent 110 of the stent conveyor 100 and the basket body 220 of the basket guide wire 200 can be accurately determined through the arrangement of the first developing element 131, the second developing element 231 and the third developing element 232, which helps the operator to fully scrape the thrombus into the accommodating cavity of the recovered stent 110 through the basket body 220 and effectively prevent the thrombus from leaking from the accommodating cavity. In combination with the stent traction element 120 and the basket core wire 210, the recovered stent 110, the basket body 220 and the thrombus can be taken out together, thereby improving the thrombus taking effect.
[0036] Optionally, as shown in Figure 2 、 Figure 4 and Figure 5 , the stent traction element 120 comprises a stent inner tube 122 and a stent outer tube 121 arranged in a nested manner;
[0037] The stent inner tube 122 is fixedly connected to the first end of the recovered stent 110, and the stent outer tube 121 moves relative to the stent inner tube 122 between a first position and a second position. When the stent outer tube 121 is at the first position, the recovered stent 110 is located in the stent outer tube 121 and is in a contracted state. When the stent outer tube 121 is at the second position, the recovered stent 110 is located outside the stent outer tube 121 and is in a released state.
[0038] The outer diameter of the recovered stent 110 in the released state is greater than the outer diameter of the recovered stent 110 in the contracted state.
[0039] In the embodiment, the recovered stent 110 can be a self-expanding stent, which can be switched between the contracted state and the released state. The switching of the state of the recovered stent 110 can be realized by sliding the stent outer tube 121. For example, the inner diameter of the stent outer tube 121 is smaller than the outer diameter of the recovered stent 110 in the released state, and the inner diameter of the stent outer tube 121 is greater than or equal to the outer diameter of the recovered stent 110 in the contracted state. When the stent outer tube 121 moves distally along the stent inner tube 122, the recovered stent 110 can be extruded in the radial direction to reduce the outer diameter thereof. When the stent outer tube 121 reaches the first position, the recovered stent 110 is switched to the contracted state and is folded into the stent outer tube 121. Conversely, when the stent outer tube 121 moves proximally along the stent inner tube 122, the recovered stent 110 gradually comes out of the stent outer tube 121 and expands in the radial direction under the action of the self-rebound force thereof. When the stent outer tube 121 reaches the second position, the recovered stent 110 is converted to the released state.
[0040] In actual application, the inner tube 122 has a channel which is in communication with the recovery stent 110, so that the stent traction member 120 and the recovery stent 110 can be sleeved on the basket core wire 210 and move to the thrombus position under the guidance of the basket core wire 210. During the movement of the recovery stent 110, the outer tube 121 can be in a contracted state to improve the traffic capacity and avoid scratching the blood vessel; and when the recovery stent 110 reaches the position near the thrombus, the outer tube 121 can be driven to move proximally relative to the inner tube 122, so that the recovery stent 110 switches to the released state, at this time, the outer diameter of the recovery stent 110 increases, the outer side wall can abut against the blood vessel wall, and the first opening diameter increases, so that the thrombus scraped by the basket body 220 can reliably reach the accommodation cavity.
[0041] In some examples, the proximal end of the recovery stent 110 can be fixedly connected with the inner tube 122, and the distal end can be a free end, so that the recovery stent 110 has a certain deformation space in the axial direction and is suitable for the size change of the recovery stent 110 in the radial direction. Of course, in actual application, the material or shape of the recovery stent 110 can be designed to meet the requirement of the size change of the recovery stent 110 in the radial direction, which is not described here.
[0042] Optionally, as shown in Figure 4 The first end of the outer tube 121 is provided with a fourth developing element 132, and when the fourth developing element 132 is aligned with the first developing element 131, the outer tube 121 is in the first position.
[0043] Further optionally, the first end of the inner tube 122 is provided with a fifth developing element 133, and when the fifth developing element 133 is aligned with the fourth developing element 132, the outer tube 121 is in the second position.
[0044] Similar to the developing elements mentioned in the above embodiments, in this embodiment, the materials and shapes of the fourth developing element 132 and the fifth developing element 133 are not limited, and they can be developed in the X-ray environment. For example, as an example, the fourth developing element 132 and the fifth developing element 133 can be developing rings. The alignment between different developing elements can also be referred to the description above, which is not repeated here.
[0045] The first end of the inner tube 122 and the first end of the outer tube 121 can be distal ends relative to the operator, and the fourth developing element 132 is arranged at the distal end of the outer tube 121. In the case that the outer tube 121 is sleeved on the recovery stent 110, the operator can indirectly determine the position of the outer tube 121 by observing the development of the fourth developing element 132 under X-ray, so as to avoid the problem of inaccurate positioning of the recovery stent 110 due to the blocking of the first developing element 131.
[0046] Of course, in some cases, the first developing piece 131 cannot be developed due to the sleeving of the stent outer tube 121, in these cases, the operator can determine that the stent outer tube 121 is in the first position according to the alignment state of the fourth developing piece 132 and the first developing piece 131, at this time, the recovered stent 110 is in the contracted state, and the stent delivery device 100 can be normally moved; on the contrary, if the fourth developing piece 132 reaches the proximal end of the first developing piece 131, the loosening between the stent outer tube 121 and the stent inner tube 122 may occur, and the operator can adjust the stent to ensure the safety of the use process.
[0047] When the recovered stent 110 is in place, the recovered stent 110 needs to be released, at this time, the operator can move the stent outer tube 121, so that the recovered stent 110 switches to the released state, and the relative position between the fourth developing piece 132 and the fifth developing piece 133 can be combined to determine whether the recovered stent 110 is released in place. Specifically, when the fourth developing piece 132 and the fifth developing piece 133 are aligned, it can be considered that the distal end of the stent outer tube 121 has reached the proximal side of the recovered stent 110, and the recovered stent 110 is completely separated from the stent outer tube 121, at this time, the recovered stent 110 is released in place and can be fully attached to the blood vessel wall under the action of the elastic force; on the contrary, if the fourth developing piece 132 is located on the distal side of the fifth developing piece 133, it usually indicates that the recovered stent 110 is still partially located in the stent outer tube 121, and the release is not sufficient, and cannot be well attached to the blood vessel wall, the operator needs to further move the stent outer tube 121 in the proximal direction until the fourth developing piece 132 and the fifth developing piece 133 are aligned, or the fourth developing piece 132 reaches the proximal side of the fifth developing piece 133.
[0048] It can be seen that through the setting of the fourth developing piece 132 and the fifth developing piece 133, the relative position of the stent outer tube 121, the recovered stent 110 and other structural stents can be determined, which facilitates the operator to more accurately operate the stent and improves the safety and reliability of the stent.
[0049] Optionally, as shown in Figure 2 The stent delivery device 100 further comprises an outer tube connecting piece 141 connected to the second end of the stent outer tube 121.
[0050] The second end of the stent outer tube 121 can be the proximal end of the stent outer tube 121, and the proximal end of the stent outer tube 121 is connected to the outer tube connecting piece 141, and the two can be integrally fixed or relatively fixed in the axial direction. The operator can drive the stent outer tube 121 to move relative to the stent inner tube 122 by operating the outer tube connecting piece 141.
[0051] In some embodiments, the outer tube connector 141 can have a larger diameter relative to the stent outer tube 121, which is convenient for the operator to hold and better operate the stent outer tube 121.
[0052] Optionally, as shown in Figure 2 the stent delivery device 100 further comprises an inner tube connector 142, and the second end of the stent inner tube 122 penetrates the outer tube connector 141 and is connected with the inner tube connector 142.
[0053] The distal end of the stent inner tube 122 can be nested in the stent outer tube 121, and at the same time, the second end of the stent inner tube 122, i.e. the proximal end of the stent inner tube 122, can penetrate the stent outer tube 121 and the outer tube connector 141 to the proximal side of the outer tube connector 141, and at the same time, the proximal end of the stent inner tube 122 can be connected with the inner tube connector 142, which can be fixed integrally or relatively fixed in the axial direction.
[0054] The inner tube connector 142 can also be convenient for the operator to hold and better operate the stent inner tube 122. In some possible embodiments, the surface of at least one of the inner tube connector 142 and the outer tube connector 141 can be provided with anti-slip patterns to improve the operation reliability of the user.
[0055] In combination with some application scenarios, during the delivery of the stent delivery device 100 to the thrombus position, the stent outer tube 121 can be placed in the first position and kept relatively fixed between the stent outer tube 121 and the stent inner tube 122, and after the stent delivery device 100 is delivered to the position, the stent outer tube 121 can be operated to the second position alone to recover the stent 110 to be released. The above operation process of the stent outer tube 121 or the stent inner tube 122 can be realized by the operator operating the outer tube connector 141 or the inner tube connector 142.
[0056] In some embodiments, the relative movement between the outer tube connector 141 and the inner tube connector 142, or between the outer tube connector 141 and the stent inner tube 122, can be locked or unlocked, and the specific implementation structure is not limited here, which can be a buckle or the like.
[0057] Optionally, as shown in Figure 6 the first end of the basket body 220 is fixedly connected to the basket core wire 210, and the second end of the basket body 220 slides relative to the basket core wire 210 to switch the basket body 220 between the released state and the contracted state, wherein the outer diameter of the basket body 220 in the released state is greater than the outer diameter of the basket body 220 in the contracted state.
[0058] In the embodiment, the basket body 220 is similar to the recovery bracket 110 in some optional embodiments above, and can be an expandable structure, that is, the basket body 220 can also be switched between the released state and the contracted state.
[0059] In some application scenarios, the basket guide wire 200 can be delivered along a catheter (not shown in the figure), the basket body 220 can be in the contracted state in the catheter and can reach the distal end of the thrombus along the catheter, when the catheter is withdrawn, the basket body 220 can be converted to the released state under the action of the rebounding force, at this time, the outer diameter of the basket body 220 increases, better covering the thrombus in the cross section, thereby facilitating reliable scraping of the thrombus.
[0060] In the embodiment, the first end of the basket body 220 is fixedly connected to the basket core wire 210, and the second end of the basket body 220 slides relative to the basket core wire 210, and the change of the outer diameter of the basket body 220 is adapted through the sliding of the second end of the basket body 220. In some examples, the first end of the basket body 220 can be the proximal end or the distal end thereof, and the second end of the basket body 220 is the opposite end of the first end of the basket body 220.
[0061] Optionally, as shown in Figure 6 The sixth developing member 233 is arranged on the basket body 220.
[0062] In the embodiment, the sixth developing member 233 is arranged on the basket body 220, so that the operator can more intuitively determine the position of the basket body 220 in the blood vessel in an X-ray environment or the like.
[0063] Optionally, the number of the sixth developing members 233 is multiple, and the multiple sixth developing members 233 are arranged around the basket core wire 210.
[0064] In the embodiment, the multiple sixth developing members 233 arranged on the basket body 220 are around the basket core wire 210, that is, the multiple sixth developing members 233 can be arranged at intervals in the circumferential direction. As shown above, the basket body 220 can be an expandable structure, and the arrangement mode of the multiple sixth developing members 233 can determine the expansion degree of the basket body 220 on the one hand, and on the other hand, ensure that the thrombectomy process is reliably performed.
[0065] In some embodiments, the basket body 220 can be a single expandable structure. While in other embodiments, the basket body 220 can also include multiple sub-baskets, and the multiple sub-baskets are arranged at intervals along the length direction of the basket core wire 210. By arranging the multiple sub-baskets, more reliable scraping of the thrombus is achieved.
[0066] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. Such terminology means that a particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearances of such terminology in various places in the specification does not necessarily refer to the same embodiment or example. Moreover, it is appreciated that the specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0067] Although embodiments of this application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A multi-position imaging thrombus removal stent, characterized in that: include: A support conveyor (100), comprising a recovery support (110), a support traction member (120) connected to a first end of the recovery support (110), and a first developing member (131) arranged at a second end of the recovery support (110), wherein the recovery support (110) has a receiving cavity, and the receiving cavity is communicated with the outside through a first opening located on an end surface of the second end of the recovery support (110); A basket guide wire (200), the basket guide wire (200) comprising a basket core wire (210), a second developing member (231), a basket main body (220), and a third developing member (232), wherein the second developing member (231), the basket main body (220), and the third developing member (232) are sequentially connected to the basket core wire (210) in a lengthwise extension direction of the basket core wire (210); The basket guide wire (200) is slidably connected to the stent conveyor (100); when the second developing member (231) is aligned with the first developing member (131), the basket body (220) is located outside the accommodating cavity; and when the third developing member (232) is aligned with the first developing member (131), the basket body (220) is located inside the accommodating cavity.
2. The multi-position imaging thrombectomy stent according to claim 1, characterized in that: The stent traction member (120) comprises a stent inner tube (122) and a stent outer tube (121) which are nested; The stent inner tube (122) is fixedly connected to the first end of the recovery stent (110); the stent outer tube (121) moves between a first position and a second position relative to the stent inner tube (122); when the stent outer tube (121) is in the first position, the recovery stent (110) is located in the stent outer tube (121) and is in a contracted state; when the stent outer tube (121) is in the second position, the recovery stent (110) is located outside the stent outer tube (121) and is in a released state; The inner diameter of the stent outer tube (121) is smaller than the outer diameter of the recovery stent (110) in the released state, and the inner diameter of the stent outer tube (121) is greater than or equal to the outer diameter of the recovery stent (110) in the contracted state.
3. The multi-position imaging thrombus removal stent according to claim 2, characterized in that: A fourth developing member (132) is provided on the first end of the bracket outer tube (121); when the fourth developing member (132) is aligned with the first developing member (131), the bracket outer tube (121) is in the first position.
4. The multi-position imaging thrombus removal stent according to claim 3, characterized in that: A fifth developing member (133) is provided on the first end of the bracket inner tube (122), and when the fifth developing member (133) is aligned with the fourth developing member (132), the bracket outer tube (121) is in the second position.
5. The multi-position imaging thrombus removal stent according to claim 2, characterized in that: The stent delivery device (100) further comprises an outer tube connector (141), wherein the outer tube connector (141) is connected to the second end of the stent outer tube (121).
6. The multi-position imaging thrombus removal stent according to claim 5, characterized in that: The stent delivery device (100) further comprises an inner tube connector (142), and the second end of the stent inner tube (122) passes through the outer tube connector (141) and is connected to the inner tube connector (142).
7. The multi-position imaging thrombectomy stent according to claim 1, characterized in that: The first end of the basket body (220) is fixedly connected to the basket core wire (210), and the second end of the basket body (220) slides relative to the basket core wire (210) to switch the basket body (220) between a released state and a contracted state, wherein the outer diameter of the basket body (220) in the released state is greater than the outer diameter of the basket body (220) in the contracted state.
8. The multi-position imaging thrombus removal stent according to any one of claims 1 to 7, characterized in that: A sixth developing member (233) is provided on the basket body (220).
9. The thrombus removal stent according to claim 8, characterized in that: There are multiple sixth developing members (233), and the multiple sixth developing members (233) are arranged around the basket core wire (210).
10. The multi-position imaging thrombus removal stent according to claim 1, characterized in that: The basket body (220) includes a plurality of sub-baskets, and the plurality of sub-baskets are arranged at intervals along the length direction of the basket core wire (210).