A catheter specifically for retrieving a carotid stent protection umbrella

Abstract

The utility model provides a kind of recovery carotid artery stent protection umbrella's catheter specially, including main body pipe and anti-jamming part;Wherein main body pipe is hollow and both ends open setting, it is suitable for fixed installation in the end of recovery catheter;Anti-jamming part is wavy, fixedly set on the outer wall of main body pipe free end, middle part is formed with the support portion that projects outward, support portion has arc surface, the end close to free end is formed with first transition part, and first transition part has first concave arc surface.When recovery protection umbrella, if the edge of main body pipe is stuck at the dentate edge of carotid artery stent, then axial rotation recovery catheter, make support portion support in-vessel wall, lift the edge of main body pipe stuck, and main body pipe can smoothly pass through carotid artery stent to specified position.When main body pipe is stuck at the edge of stent, by support portion, recovery catheter can be lifted, so that recovery catheter can smoothly pass through stent, ensure normal operation.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary equipment technology, specifically to a catheter for the recycling of carotid artery stent protective umbrellas. Background Technology

[0002] Carotid artery stenting is a minimally invasive vascular interventional treatment technique designed to relieve carotid artery stenosis, restore normal blood flow to the brain, and prevent serious cerebrovascular events such as ischemic stroke. The procedure involves implanting a stent to mechanically dilate the narrowed carotid artery, thereby achieving vascular recanalization. The procedure is typically performed under local anesthesia. First, vascular access is established via femoral or radial artery puncture. Then, the surgeon inserts a guiding catheter to the carotid artery stenosis site, followed by the insertion of a guidewire. To reduce the risk of distal embolism due to thrombus or plaque dislodgement during the procedure, a carotid artery stent umbrella is advanced along the guidewire after it passes the stenosis. The umbrella is a distal filtering device that captures any thrombus or plaque fragments that may dislodge during the procedure. After the umbrella is positioned, a balloon dilation catheter is advanced along the guidewire to the stenosis site for pre-dilation. The balloon catheter is then withdrawn, and a stent of appropriate size is selected and advanced along the guidewire to the stenosis site. Once accurately positioned, the stent is released. After release, the stent inflates spontaneously, adhering to the vessel wall and opening the narrowed carotid artery, restoring the vessel's diameter. Finally, the umbrella is retrieved using a retrieval catheter (specifically designed for retrieving the carotid artery stent umbrella). The use of carotid artery stent umbrellas significantly improves the safety of the procedure and reduces the incidence of distal embolism complications.

[0003] The process of retrieving the protective umbrella involves passing the retrieval catheter along the guidewire through the carotid artery stent, then retrieving the protective umbrella into the retrieval catheter distal to the stent. The retrieval catheter, along with the protective umbrella, is then withdrawn from the body along the guidewire, completing the retrieval operation. (Reference) Figure 6-8 (As shown). The problem now is that, because the end of the retrieval catheter 01 is a straight nozzle 04, while both ends of the stent 02 have serrated edges 03, when the retrieval catheter 01 passes through the stent 02, the edge of the straight nozzle 04 can easily get stuck at the serrated edge 03 at one end of the stent 02 (as shown). Figure 9 As shown in the figure, the retrieval catheter 01 could not pass through the stent 02 smoothly, affecting the normal progress of the operation.

[0004] Therefore, how to design a special carotid artery stent retrieval catheter that can smoothly pass through the stent and ensure the normal progress of the surgery is a technical problem that has not yet been solved in the existing technology. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the technical defect in the prior art where the straight tip of the retrieval catheter is easily stuck at the toothed edge of the stent, causing the retrieval catheter to be unable to pass through the stent and affecting the normal operation of the surgery. Thus, a special retrieval catheter for carotid artery stents is provided that allows the retrieval catheter to pass through the stent smoothly and ensures the normal operation of the surgery.

[0006] Therefore, this utility model provides a catheter specifically for retrieval of carotid artery stent protective umbrella, comprising: a main tube, which is hollow and open at both ends, with one end suitable for fixed installation at the end of the retrieval catheter; and an anti-jamming component, which is wavy and fixedly disposed on the outer wall of the free end of the main tube, with an outwardly protruding support portion formed in the middle, the support portion having an arc-shaped surface, and a first transition portion formed at the end near the free end, the first transition portion having a first concave arc surface.

[0007] As a preferred embodiment, the anti-jamming component has a second transition portion formed at the end away from the free end, and the second transition portion has a second concave arc surface.

[0008] As a preferred embodiment, the inner wall of the other end of the main tube is provided with an internal thread, and the main tube is adapted to be threadedly connected to the recovery conduit via the internal thread.

[0009] As a preferred embodiment, the inner wall of the other end of the main tube is provided with an adhesive surface, and the main tube is adapted to be bonded to the recycling conduit through the adhesive surface.

[0010] As a preferred embodiment, the anti-jamming component has an inner cavity.

[0011] As a preferred embodiment, the main tube and the anti-jamming component are provided with an elongated opening that communicates with the inner cavity.

[0012] The technical solution provided by this utility model has the following advantages:

[0013] This utility model discloses a catheter specifically designed for the retrieval of carotid artery stents, comprising: a main tube and an anti-jamming component; wherein the main tube is hollow and open at both ends, with one end suitable for fixed installation at the end of the retrieval catheter; the anti-jamming component is wavy and fixedly installed on the outer wall of the free end of the main tube, with an outwardly protruding support portion formed in the middle, the support portion having an arc-shaped surface, and a first transition portion formed at the end near the free end, the first transition portion having a first concave arc surface.

[0014] During the retrieval of the protective umbrella, the catheter of this invention is installed at the front end of the retrieval catheter. The retrieval catheter is then passed along the guidewire through the carotid artery stent to a position close to the protective umbrella. If, during this process, the edge of the main tube becomes stuck at the serrated edge of the carotid artery stent, the retrieval catheter is rotated to allow the supporting part to support the inner wall of the blood vessel, lifting the stuck edge of the main tube. This allows the main tube to smoothly pass through the carotid artery stent to the designated position. This invention is a catheter specifically designed for retrieval of carotid artery stent protective umbrellas. When the main tube becomes stuck at the edge of the stent, the supporting part can lift the retrieval catheter, allowing it to smoothly pass through the stent, thus ensuring the normal progress of the procedure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of the catheter for the special recycling of carotid artery stent protective umbrella according to this utility model.

[0017] Figure 2 yes Figure 1 Enlarged structural diagram of part A.

[0018] Figure 3 yes Figure 2 Another stereoscopic view.

[0019] Figure 4 yes Figure 2 A sectional view.

[0020] Figure 5 yes Figure 4 Another stereoscopic view after the guidewire has been removed.

[0021] Figure 6 This is a schematic diagram of the process of retrieving the catheter through the stent during carotid artery stenting surgery.

[0022] Figure 7 yes Figure 6 A schematic diagram of the structure of the central support.

[0023] Figure 8 yes Figure 6 A schematic diagram of the straight end of the recovery conduit.

[0024] Figure 9 This is a schematic diagram simulating the retrieval catheter getting stuck in the stent.

[0025] Reference numerals: 01, recovery conduit; 02, support; 03, serrated edge; 04, straight tube opening; 1, main tube; 2, anti-jamming component; 20, support part; 200, arc-shaped surface; 21, first transition part; 211, first concave arc surface; 22, second transition part; 222, second concave arc surface; 23, inner cavity; 231, elongated opening. Detailed Implementation

[0026] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0027] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0029] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0030] This embodiment provides a catheter specifically designed for the retrieval of carotid artery stent protective umbrellas, such as... Figure 1-3 As shown, it includes: a main tube 1 and an anti-jamming component 2; wherein the main tube 1 is hollow and open at both ends, one end of which is suitable for fixed installation at the end of the recovery conduit; the anti-jamming component 2 is wavy and fixedly installed on the outer wall of the free end of the main tube 1, and has an outwardly protruding support portion 20 in the middle, the support portion 20 having an arc-shaped surface 200, and a first transition portion 21 being formed at the end near the free end, the first transition portion 21 having a first concave arc surface 211.

[0031] During the retrieval of the protective umbrella, the catheter of this embodiment is installed at the front end of the retrieval catheter 01. The retrieval catheter 01 passes along the guidewire through the carotid artery stent 02 to a position close to the protective umbrella. During this process, if the edge of the main tube 1 gets stuck at the serrated edge 03 of the carotid artery stent 02, the retrieval catheter 01 is rotated so that the support part 20 supports the inner wall of the blood vessel, lifting the stuck edge of the main tube 1. In this way, the main tube 1 can smoothly pass through the carotid artery stent 02 to the designated position. This embodiment is a catheter specifically designed for retrieval of the carotid artery stent protective umbrella. When the main tube 1 gets stuck at the edge of the stent 02, the support part 20 can support the retrieval catheter 01, allowing the retrieval catheter 01 to smoothly pass through the stent 02, thereby ensuring the normal progress of the operation.

[0032] The anti-jamming component 2 has a second transition portion 22 at the end away from the free end, and the second transition portion 22 has a second concave arc surface 222. During the retrieval of the retrieval conduit 01, the second concave arc surface 222 helps the support portion 20 to smoothly pass through the toothed edge 03 at the other end of the bracket 02, thereby enabling the retrieval conduit 01 to be retrieved smoothly.

[0033] The inner wall of the other end of the main tube 1 is provided with an internal thread, and the main tube 1 is adapted to be threadedly connected to the recovery conduit through the internal thread.

[0034] As a variation of the design, the inner wall of the other end of the main tube 1 may also be provided with an adhesive surface, and the main tube 1 is adapted to be bonded to the recycling conduit through the adhesive surface.

[0035] like Figure 4 As shown, the anti-jamming component 2 has an inner cavity 23 for weight reduction, making it easier and less strenuous for doctors to operate.

[0036] like Figure 5 As shown, the main tube 1 and the anti-jamming component 2 have an elongated opening 231 that communicates with the inner cavity 23 at their relative positions.

[0037] The catheter for specifically recovering the carotid artery stent umbrella in this embodiment is used as follows:

[0038] During the retrieval of the protective umbrella, the catheter of this embodiment is installed at the front end of the retrieval catheter 01. The retrieval catheter 01 passes through the carotid artery stent 02 along the guidewire to a position close to the protective umbrella. During this process, if the edge of the main tube 1 gets stuck at the serrated edge 03 of the carotid artery stent 02, the retrieval catheter 01 is rotated so that the support portion 20 supports the inner wall of the blood vessel, lifting the stuck edge of the main tube 1. In this way, the main tube 1 can smoothly pass through the carotid artery stent 02 to the designated position. During the retrieval of the retrieval catheter 01, the second concave arc surface 222 helps the support portion 20 to smoothly pass through the serrated edge 03 at the other end of the stent 02, thereby enabling the retrieval catheter 01 to be retrieved smoothly.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A catheter specifically designed for the retrieval of carotid artery stent protective umbrellas, characterized in that, include: The main tube (1) is hollow and open at both ends, with one end suitable for fixed installation at the end of the recovery conduit; The anti-jamming component (2) is wavy and is fixedly installed on the outer wall of the free end of the main tube (1). A support part (20) protruding outward is formed in the middle. The support part (20) has an arc-shaped surface (200). A first transition part (21) is formed at one end near the free end. The first transition part (21) has a first concave arc surface (211).

2. The catheter for specifically recovering carotid artery stent protection umbrellas according to claim 1, characterized in that: The anti-jamming component (2) has a second transition portion (22) formed at the end away from the free end, and the second transition portion (22) has a second concave arc surface (222).

3. The catheter for specifically recovering carotid artery stent protection umbrellas according to claim 1, characterized in that: The inner wall of the other end of the main tube (1) is provided with an internal thread, and the main tube (1) is adapted to be threadedly connected to the recovery conduit through the internal thread.

4. The catheter for specifically recovering carotid artery stent protection umbrellas according to claim 1, characterized in that: The inner wall of the other end of the main tube (1) is provided with an adhesive surface, and the main tube (1) is adapted to be bonded to the recycling conduit through the adhesive surface.

5. The catheter for specifically recovering carotid stent protective umbrellas according to claim 1, characterized in that: The anti-jamming component (2) has an inner cavity (23).

6. The catheter for specifically recovering the carotid artery stent umbrella according to claim 5, characterized in that: The main tube (1) and the anti-jamming component (2) are provided with an elongated opening (231) that connects to the inner cavity (23).

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