Intravascular stent recovery device
By designing a vascular stent recovery device including removal sheath, recovery sheath, grabbing basket, clamping device and grabbing device, the problem of vascular stent falling off and scratching the inner wall of the blood vessel during the recovery process is solved, and a safer and more reliable recycling process is achieved.
Patent Information
- Application Number
- CN202421071546.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-05-16
AI Technical Summary
During the process of recovering the vascular stent, the vascular stent is prone to fall off from the capture wire and becomes hardened due to temperature changes, which makes it easy to scratch the inner wall of the blood vessel during dragging.
A vascular stent recovery device is designed, including a sheath removal, a sheath recovery, a grab basket, a gripper and a grabber. Through the cooperation of the grab basket and the clamp, the blood vessel stent is fixed to the clamp, and the grab basket is closed into the recovery sheath by moving the removal sheath, compressing the recovery stent.
It effectively reduces the risk of vascular stent falling off during the recycling process, and reduces the risk of scratching the inner wall of the blood vessel, improving the safety and reliability of the recycling process.
Smart Images
Figure CN222777399U_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure relate to the technical field of vascular stent recovery, and in particular to a vascular stent recovery device. Background Art
[0002] Vascular stents play an important role in the medical field. They are mainly used to support narrow or occluded blood vessel segments, reduce vascular elastic retraction and reshaping, and thus maintain blood flow in the lumen. The commonly used method for installing vascular stents is to deliver the vascular stent into the blood vessel through a stent balloon and release it between the blood vessels on the vascular endothelium. In the process of pushing the stent, due to severe vascular lesions (such as distortion and calcification, etc.), the stent is easily unloaded from the stent balloon, resulting in installation failure. The stent needs to be recovered. Most of the related stent recovery devices hook the vascular stent with a capture wire and then drag the vascular stent out.
[0003] However, when the above method is used to install a vascular stent, the following technical problems often occur:
[0004] In the process of hooking the vascular stent with the catch wire and dragging it out, the vascular stent is easy to fall off from the catch wire, and because the vascular stent will harden quickly due to the influence of the body temperature, the vascular stent is easy to scratch the inner wall of the blood vessel during the dragging process.
[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure concept and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Utility Model Content
[0006] The content of this disclosure is used to introduce concepts in a brief form, and these concepts will be described in detail in the specific implementation section below. The content of this disclosure is not intended to identify the key features or essential features of the technical solution for which protection is sought, nor is it intended to limit the scope of the technical solution for which protection is sought. Some embodiments of the present disclosure propose a vascular stent recovery device to solve one or more of the technical problems mentioned in the above background technology section.
[0007] Some embodiments of the present disclosure provide a vascular stent recovery device, which includes: a removal sheath, a recovery sheath, a capture basket, a clamp and a capture device, wherein one end of the removal sheath is movably sleeved inside the recovery sheath, and one end of the capture basket is fixedly connected to one end of the removal sheath; during the process of recovering the vascular stent, the capture basket extends from the inside of the recovery sheath, and the capture basket is in an expanded state; after recovering the vascular stent, the capture basket is located inside the recovery sheath, and the capture basket is in a retracted state; the clamp includes a clamping tube and a clamping claw, the clamping tube is movably arranged inside the removal sheath, and one end of the clamping tube extends from the removal sheath, and the clamping claw is arranged at one end of the clamping tube extending from the removal sheath, wherein the clamping claw includes various clamping blocks, and when the clamp moves to the inside of the removal sheath, the various clamping blocks approach each other; the capture device is movably arranged in the removal sheath, and the capture device is used to capture the vascular stent.
[0008] Optionally, an operating handle is provided at the other end of the removal sheath.
[0009] Optionally, a moving handle is provided on the outer wall of the clamping tube, and a radial moving hole corresponding to the moving handle is provided on the removal sheath; when the moving handle moves in the radial moving hole, the clamping tube moves relative to the removal sheath.
[0010] Optionally, a locking positioning hole is provided at one end of the radial moving hole, the locking positioning hole is connected to the radial moving hole, and the locking positioning hole is located at the side of the radial moving hole; when the moving handle is clamped in the locking positioning hole, the clamp moves toward the inside of the removal sheath, and the clamp clamps the vascular stent.
[0011] Optionally, the width of the connection between the locking positioning hole and the radial moving hole is smaller than the width of the connection between the locking positioning hole and the radial moving hole; the width of the connection between the locking positioning hole and the radial moving hole is equal to the diameter of the moving handle.
[0012] Optionally, the capture basket is a tubular mesh frame, and the capture basket in the expanded state is trumpet-shaped.
[0013] Optionally, one end of the capture device for capturing the vascular stent is provided with a capture forceps.
[0014] Optionally, the capture basket is made of memory metal material.
[0015] Optionally, the material of the recovery sheath is elastic material.
[0016] The above-mentioned various embodiments of the present disclosure have the following beneficial effects: the vascular stent recovery device of some embodiments of the present disclosure can reduce the risk of the vascular stent falling off during the recovery process and reduce the risk of the vascular stent scratching the inner wall of the blood vessel. Specifically, the reason why the vascular stent is easy to fall off and the vascular stent is easy to scratch the inner wall of the blood vessel is that in the process of hooking the vascular stent with the catching wire and dragging it out, the vascular stent is easy to fall off from the catching wire, and because the vascular stent will quickly harden due to the influence of the body temperature, the vascular stent is easy to scratch the inner wall of the blood vessel during the dragging process. Based on this, some embodiments of the present disclosure provide a vascular stent recovery device comprising: a removal sheath, a recovery sheath, a capture basket, a clamp and a capture device, wherein one end of the removal sheath is movably sleeved inside the recovery sheath, and one end of the capture basket is fixedly connected to one end of the removal sheath; during the process of recovering the vascular stent, the capture basket extends from the inside of the recovery sheath, and the capture basket is in an expanded state; after recovering the vascular stent, the capture basket is located inside the recovery sheath, and the capture basket is in a retracted state; the clamp comprises a clamping tube and a clamping claw, the clamping tube is movably arranged inside the removal sheath, and one end of the clamping tube extends from the removal sheath, and the clamping claw is arranged at one end of the clamping tube extending from the removal sheath, wherein the clamping claw comprises various clamping blocks, and when the clamp moves toward the inside of the removal sheath, the various clamping blocks approach each other; the capture device is movably arranged in the removal sheath, and the capture device is used to capture the vascular stent. During the process of recovering the vascular stent, the capture basket is in an expanded state, because the vascular stent can be captured to the clamp by the capture device, so that the vascular stent can be fixed by the clamp, thereby reducing the risk of the vascular stent falling off during the recovery process. At this time, the vascular stent is located in the capture basket, and because the capture basket is gradually retracted into the recovery sheath by moving the removal sheath, the capture basket compresses the vascular stent clamped by the clamp and compresses it into the recovery sheath, and then when the vascular stent recovery device is pulled out, the vascular stent can be recovered, and by compressing the vascular stent into the recovery sheath, the risk of the vascular stent falling off during the recovery process can be reduced, and the vascular stent can be prevented from scratching the inner wall of the blood vessel. Therefore, the vascular stent recovery device can reduce the risk of the vascular stent falling off during the recovery process and reduce the risk of the vascular stent scratching the inner wall of the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that components and elements are not necessarily drawn to scale.
[0018] Figure 1 It is a schematic diagram of the structure of some embodiments of the vascular stent recovery device according to the present disclosure. DETAILED DESCRIPTION
[0019] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.
[0020] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.
[0021] It should also be noted that, for ease of description, only the parts related to the relevant disclosure are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.
[0022] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0023] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".
[0024] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.
[0025] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.
[0026] Figure 1 The diagram is a schematic diagram of the structure of some embodiments of the vascular stent recovery device according to the present disclosure. The vascular stent recovery device comprises a removal sheath 1, a recovery sheath 2, a capture basket 3 and a capture device 4.
[0027] In some embodiments, the above-mentioned vascular stent recovery device may include a removal sheath 1, a recovery sheath 2, a capture basket 3, a clamp and a capture device 4. Among them, the above-mentioned removal sheath 1 may be a tubular body for removing the vascular stent. The above-mentioned recovery sheath 2 may be a tubular body for recovering the vascular stent. The diameter of the above-mentioned recovery sheath 2 may be larger than the diameter of the above-mentioned removal sheath 1. One end of the above-mentioned removal sheath 1 may be movably sleeved inside the above-mentioned recovery sheath 2. One end of the above-mentioned capture basket 3 may be fixedly connected to one end of the above-mentioned removal sheath 1. As an example, one end of the above-mentioned capture basket 3 may be bonded to one end of the above-mentioned removal sheath 1.
[0028] In some embodiments, during the process of recovering the vascular stent, the catch basket 3 can extend from the inside of the recovery sheath 2. The catch basket 3 can be in an expanded state. After recovering the vascular stent, the catch basket 3 can be located inside the recovery sheath 2. The catch basket 3 can be in a retracted state. It can be understood that when recovering the vascular stent, the vascular stent recovery device extends into the blood vessel, one end of the extraction sheath 1 extends from one end of the recovery sheath 2, and the end of the catch basket 3 that is not connected to the extraction sheath 1 is expanded. When the vascular stent is dragged into the catch basket 3, the extraction sheath 1 is pulled into the recovery sheath 2, and the catch basket 3 can retract the vascular stent into the recovery sheath 2.
[0029] In some embodiments, the clamp may include a clamping tube and a clamping claw. The clamping tube may be movably disposed inside the extraction sheath 1, and one end of the clamping tube may extend from the extraction sheath 1. The clamping claw may be disposed at one end of the clamping tube extending from the extraction sheath 1. The clamping claw may include various clamping blocks. When the clamp moves toward the inside of the extraction sheath 1, the various clamping blocks may approach each other. It can be understood that when the clamp moves toward the inside of the extraction sheath 1, the clamping claw is squeezed by the extraction sheath 1, and the various clamping blocks may clamp the vascular stent. In practice, the vascular stent may be captured onto the clamp by the capturer 4, and the vascular stent may be clamped and fixed by the clamp.
[0030] In some embodiments, the catcher 4 may be movably disposed in the removal sheath 1. The catcher 4 may be located inside the clamp. The catcher 4 may be used to catch the vascular stent. For example, the catcher 4 may be a biopsy forceps or a catcher wire. In practice, during the process of retrieving the vascular stent, the catcher 4 may extend from the removal sheath 1. The catcher 4 may clamp the vascular stent and drag the vascular stent onto the clamp.
[0031] Optionally, an operating handle may be provided at the other end of the extraction sheath 1. Thus, the user may drive the extraction sheath 1 to move by the operating handle.
[0032] Optionally, the outer wall of the clamping tube may be provided with a moving handle. The extraction sheath 1 may be provided with a radial moving hole corresponding to the moving handle. When the moving handle moves in the radial moving hole, the clamping tube may move relative to the extraction sheath 1. Thus, the user may control the movement of the holding tube in the extraction sheath 1 through the moving handle.
[0033] Optionally, a locking positioning hole may be provided at one end of the radial moving hole. The locking positioning hole may be connected to the radial moving hole. The locking positioning hole may be located at the side of the radial moving hole. When the moving handle is clamped in the locking positioning hole, the clamp may move toward the inside of the removal sheath 1, and the clamp may clamp the vascular stent. In practice, after the clamping jaws clamp the vascular stent, the moving handle may be clamped in the locking positioning hole for locking, thereby preventing the vascular stent from falling off from the clamping jaws.
[0034] Optionally, the width of the connection between the locking positioning hole and the radial moving hole may be smaller than the width of the connection between the locking positioning hole and the radial moving hole. The width of the connection between the locking positioning hole and the radial moving hole may be equal to the diameter of the moving handle.
[0035] Optionally, the capture basket 3 may be a tubular mesh frame. The capture basket 3 in the expanded state may be in a trumpet shape.
[0036] Optionally, one end of the capturer 4 used for capturing the vascular stent may be provided with a capture forceps.
[0037] Optionally, the material of the capture basket 3 may be a memory metal material.
[0038] Optionally, the material of the recovery sheath 2 may be an elastic material.
[0039] Next, when the vascular stent recovery device disclosed in the present invention is used to recover the vascular stent, there is further the following technical problem 2:
[0040] Vascular stents have various shapes, and some vascular stents cannot be clamped by the catcher 4, resulting in poor universality of the above-mentioned vascular stent recovery device.
[0041] In the face of the above technical problem 2, the following solutions can be adopted:
[0042] Optionally, the blood vessel recovery device may further include a negative pressure tube and a negative pressure suction head. The negative pressure tube may be movably inserted into the interior of the removal sheath 1. The negative pressure tube may be arranged inside the clamping tube. The negative pressure tube may extend from the clamp. The negative pressure suction head may be connected to one end of the negative pressure tube. The other end of the negative pressure tube may be used to connect a vacuum pump. The shape of the negative pressure suction head may match the shape of the vascular stent to be recovered. The connection between the negative pressure suction head and the negative pressure tube may be a detachable connection. Here, the specific detachable connection between the negative pressure suction head and the negative pressure tube is not limited. As an example, the connection between the negative pressure suction head and the negative pressure tube may be a threaded connection or a snap-on connection. The material of the negative pressure suction head may be a magnetic material. The catcher 4 may be arranged on the inner wall of the negative pressure tube. Specifically, the catcher 4 may be bonded to the inner wall of the negative pressure tube. In practice, during the process of recovering the vascular stent, the negative pressure tube can be extended from the removal sheath 1. When the negative pressure suction head approaches the vascular stent, the negative pressure suction head can be adsorbed on the vascular stent by turning on the vacuum pump. The negative pressure tube is pulled into the removal sheath 1 to drive the vascular stent adsorbed by the negative pressure suction head to approach the clamp, so that the clamp clamps the vascular stent.
[0043] The above-mentioned related contents serve as an inventive point of the embodiment of the present disclosure, and solve the technical problem 2 mentioned in the background technology, "the vascular stent has various shapes, and some vascular stents cannot be clamped by the catcher 4, resulting in poor universality of the above-mentioned vascular stent recovery device". The factors that lead to the poor universality of the vascular stent recovery device are often as follows: the vascular stent has various shapes, and some vascular stents cannot be clamped by the catcher 4. If the above-mentioned factors are solved, the effect of improving the universality of the vascular stent recovery device can be achieved. In order to achieve this effect, the vascular recovery device of the present disclosure may also include a negative pressure tube and a negative pressure suction head. The above-mentioned negative pressure tube can be movably passed through the interior of the above-mentioned extraction sheath 1. The above-mentioned negative pressure tube can be arranged inside the above-mentioned clamping tube. The above-mentioned negative pressure tube can be extended from the above-mentioned clamp. The above-mentioned negative pressure suction head can be connected to one end of the above-mentioned negative pressure tube. The other end of the above-mentioned negative pressure tube can be used to connect a vacuum pump. The shape of the above-mentioned negative pressure suction head can match the shape of the vascular stent to be recovered. The connection method of the above-mentioned negative pressure suction head and the above-mentioned negative pressure tube is a detachable connection. The catcher 4 can be arranged on the inner wall of the negative pressure tube. Thus, the vascular stent can be adsorbed by the negative pressure suction head, and when the negative pressure tube is pulled into the removal sheath 1, the vascular stent adsorbed by the negative pressure suction head can be driven close to the clamping claw, so that the clamping claw clamps the vascular stent, and then the vascular stent can be adsorbed by negative pressure when some vascular stents cannot be clamped by the catcher 4, because the shape of the negative pressure suction head can match the shape of the vascular stent to be recovered, and the connection between the negative pressure suction head and the negative pressure tube is detachable, so that it can be used to adsorb a variety of vascular stents, thereby further improving the universality of the vascular stent recovery device.
[0044] The above-mentioned various embodiments of the present disclosure have the following beneficial effects: the vascular stent recovery device of some embodiments of the present disclosure can reduce the risk of the vascular stent falling off during the recovery process and reduce the risk of the vascular stent scratching the inner wall of the blood vessel. Specifically, the reason why the vascular stent is easy to fall off and the vascular stent is easy to scratch the inner wall of the blood vessel is that in the process of hooking the vascular stent with the catching wire and dragging the vascular stent out, the vascular stent is easy to fall off from the catching wire, and because the vascular stent will quickly harden due to the influence of the body temperature, the vascular stent is easy to scratch the inner wall of the blood vessel during the dragging process. Based on this, the vascular stent recovery device of some embodiments of the present disclosure includes: a removal sheath 1, a recovery sheath 2, a capture basket 3, a clamp and a capture device 4, wherein one end of the above-mentioned removal sheath 1 is movably sleeved inside the above-mentioned recovery sheath 2, and one end of the above-mentioned capture basket 3 is fixedly connected to one end of the above-mentioned removal sheath 1; in the process of recovering the vascular stent, the above-mentioned capture basket 3 extends from the inside of the above-mentioned recovery sheath 2, and the above-mentioned capture basket 3 is in an expanded state. After the vascular stent is recovered, the above-mentioned capture basket 3 is located inside the above-mentioned recovery sheath 2, and the above-mentioned capture basket 3 is in an expanded state. After the vascular stent is recovered, the above-mentioned capture basket 3 is located inside the above-mentioned recovery sheath 2, and the above-mentioned capture basket 3 is in an expanded state. The capture basket 3 is in a folded state; the clamp includes a clamp tube and a clamp claw, the clamp tube is movably arranged inside the extraction sheath 1, and one end of the clamp tube extends from the extraction sheath 1, and the clamp claw is arranged at the end of the clamp tube extending from the extraction sheath 1, wherein the clamp claw includes various clamp blocks, and when the clamp moves to the inside of the extraction sheath 1, the various clamp blocks approach each other; the capture device 4 is movably arranged in the extraction sheath 1, and the capture device 4 is used to capture the vascular stent. In the process of recovering the vascular stent, the capture basket 3 is in an expanded state, because the vascular stent can be captured to the clamp by the capture device 4, so that the vascular stent can be fixed by the clamp, thereby reducing the risk of the vascular stent falling off during the recovery process. At this time, the vascular stent is located in the above-mentioned capture basket 3, and because the capture basket 3 is gradually retracted into the above-mentioned recovery sheath 2 by moving the above-mentioned removal sheath 1, the above-mentioned capture basket 3 compresses the vascular stent clamped by the above-mentioned clamp to compress and recover it into the above-mentioned recovery sheath 2, and then when the vascular stent recovery device is pulled out, the vascular stent can be recovered, and by compressing the vascular stent into the recovery sheath 2, the risk of the vascular stent falling off during the recovery process can be reduced, and the vascular stent can be prevented from scratching the inner wall of the blood vessel. Therefore, the vascular stent recovery device can reduce the risk of the vascular stent falling off during the recovery process and reduce the risk of the vascular stent scratching the inner wall of the blood vessel.
[0045] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned disclosure concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) to form a technical solution.
Claims
1. A vascular stent recovery device, characterized in that: The vascular stent recovery device comprises a removal sheath, a recovery sheath, a capture basket, a clamp and a capture device, wherein: One end of the extraction sheath is movably sleeved inside the recovery sheath, and one end of the capture basket is fixedly connected to one end of the extraction sheath; During the process of recovering the vascular stent, the capture basket extends from the inside of the recovery sheath, and the capture basket is in an expanded state. After the vascular stent is recovered, the capture basket is located inside the recovery sheath, and the capture basket is in a retracted state. The clamp comprises a clamping tube and a clamping claw, wherein the clamping tube is movably arranged inside the extraction sheath, and one end of the clamping tube extends out from the extraction sheath, and the clamping claw is arranged at one end of the clamping tube extending out from the extraction sheath, wherein the clamping claw comprises various clamping blocks, and when the clamp moves toward the inside of the extraction sheath, the various clamping blocks approach each other; The catcher is movably arranged in the removal sheath, and is used for capturing the blood vessel stent.
2. The vascular stent recovery device according to claim 1, characterized in that: The other end of the removal sheath is provided with an operating handle.
3. The vascular stent recovery device according to claim 1, characterized in that: The outer wall of the clamping tube is provided with a moving handle, and the removal sheath is provided with a radial moving hole corresponding to the moving handle; When the moving handle moves in the radial moving hole, the clamping tube moves relative to the removal sheath.
4. The vascular stent recovery device according to claim 3, characterized in that: A locking positioning hole is provided at one end of the radial moving hole, the locking positioning hole is communicated with the radial moving hole, and the locking positioning hole is located at the side of the radial moving hole; When the movable handle is clamped in the locking positioning hole, the clamp moves toward the inside of the removal sheath, and the clamp clamps the blood vessel stent.
5. The vascular stent recovery device according to claim 4, characterized in that: The width of the connection between the locking positioning hole and the radial movement hole is smaller than the width of the connection between the locking positioning hole and the radial movement hole; The width of the connection between the locking positioning hole and the radial moving hole is equal to the diameter of the moving handle.
6. The vascular stent recovery device according to claim 1, characterized in that: The capture basket is a tubular mesh frame, and the capture basket in an expanded state is in a trumpet shape.
7. The vascular stent recovery device according to claim 1, characterized in that: The catcher is used to catch the blood vessel stent and one end thereof is provided with a catch forceps.
8. The vascular stent recovery device according to claim 1, characterized in that: The material of the catching basket is memory metal material.
9. The vascular stent recovery device according to claim 1, characterized in that: The material of the recovery sheath is elastic material.