Relocatable stent introducer
By introducing a bent hook head repositioning device and a developing device into the bracket inserter, the problem of bracket slipping is solved, and the precise retraction and repositioning of the bracket is achieved, which facilitates the complete recovery of the bracket.
Patent Information
- Application Number
- CN202421806461.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The traditional bracket inserter easily slips off during the retraction process, resulting in failure of repositioning.
A repositionable bracket inserter is designed, using a bent hook head repositioning device, combined with a repositionable failure mark and a starting mark, ensuring that the bracket is not separated from the middle tube, and the bracket position is monitored in vitro through the developing device.
Accurate retraction and repositioning of the bracket is achieved to avoid slippage and ensure that the bracket is completely retracted into the outer tube for easy recycling.
Smart Images
Figure CN223054598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical devices, and particularly relates to a repositionable stent introducer. Background Art
[0002] The structure of a traditional stent introducer generally includes an inner tube, an outer tube, a middle tube, a terminal head and other structures, and one end of the middle tube is inserted into the inner part of the outer tube or connected to the stent through a repositioning device. However, the hook head of the repositioning device of the traditional stent is upright, and the stent will slip off from the end of the hook head during the process of withdrawing the stent for repositioning, so that the middle tube is separated from the stent, and the function of repositioning cannot be realized.
[0003] Therefore, a repositionable stent introducer is proposed. Content of the Utility Model
[0004] In view of the problems existing in the above-mentioned existing stent introducers, the present utility model is proposed.
[0005] Therefore, the purpose of the present utility model is to provide a repositionable stent introducer, which solves the problems raised in the background art.
[0006] In order to achieve the above purpose, the present utility model provides the following technical solutions:
[0007] A repositionable stent introducer, comprising an outer tube, a middle tube, an inner tube and a terminal. A stent is arranged inside the outer tube. One end of the inner tube is fixedly arranged inside one end of the stent, and the other end of the inner tube extends to the outside of the outer tube and is fixedly connected to the terminal. A repositioning device is fixedly arranged at one end of the stent away from the inner tube. One end of the middle tube is inserted into the inner part of the outer tube and is fixedly connected to the repositioning device. The tube wall of the middle tube is provided with a repositioning failure mark and a repositioning start mark. The repositioning device includes a main body. Two curved hook heads are symmetrically and fixedly arranged at one end of the main body. One end of the main body is fixedly connected to one end of the stent through the curved hook heads. Fixed sawteeth are arranged at the other end of the main body. The other end of the main body is fixedly connected to one end of the middle tube through the fixed sawteeth. A push arm in contact with one end of the stent is arranged in the middle of the outer wall of the main body.
[0008] Preferably, the main body adopts a tubular structure.
[0009] Preferably, a developing device is arranged at one end of the outer tube close to the terminal.
[0010] Furthermore, a front handle is fixedly arranged on the tube wall of the outer tube, and a rear handle is fixedly arranged on the tube wall of the middle tube.
[0011] Preferably, scale lines are arranged on the tube walls of both the outer tube and the middle tube.
[0012] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:
[0013] In the present utility model, by providing a repositioning device, and a bent hook head is provided on the main body of the repositioning device. The bent hook head is arranged inside one end of the bracket. During the process of withdrawing the bracket for repositioning, the bracket and the bent hook head will not slip off, so that the middle tube and the bracket will not separate, and the action of withdrawing the bracket can be accurately completed.
[0014] In the present utility model, by providing a repositioning failure mark, a repositioning start mark, a front handle and a rear handle, when the bracket is not fully released, that is, when the repositioning start mark does not coincide with the proximal end of the front handle, at this time, the medical staff holds the front handle and the rear handle with both hands respectively, keeps the front handle stationary, and slowly withdraws the rear handle, so that the middle tube withdraws the bracket until the bracket is synchronously withdrawn into the outer tube. If the repositioning failure mark is exposed and does not coincide with the proximal end of the front handle, it indicates that the bracket has been completely withdrawn into the outer tube, and the withdrawal should be ended. If the repositioning failure mark extends into the interior of the outer tube and the repositioning start mark coincides with the front handle, it means that the bracket has been implanted into the body.
[0015] In the present utility model, by providing a visualization device, the position of the stent release and repositioning can be viewed under the monitoring of external rays, which is convenient for retrieval. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.
[0017] Figure 1 is a structural schematic diagram of the present utility model;
[0018] Figure 2 is of the present utility model Figure 1 is a structural schematic diagram of the repositioning device in the present utility model;
[0019] Figure 3 is of the present utility model Figure 1 is a structural schematic diagram of the outer tube in the present utility model;
[0020] Figure 4 is of the present utility model Figure 1 is a structural schematic diagram of the middle tube in the present utility model.
[0021] Description of the reference numerals:
[0022] 1. Outer tube; 2. Middle tube; 3. Inner tube; 4. Terminal; 5. Stent; 6. Repositioning device; 7. Repositioning failure mark; 8. Repositioning start mark; 9. Body; 10. Bent hook head; 11. Fixed serration; 12. Push arm; 13. Imaging device; 14. Front handle; 15. Rear handle; 16. Scale line. Detailed implementation mode
[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.
[0024] An embodiment of the present invention discloses a repositionable stent inserter.
[0025] The present invention provides a repositionable stent inserter as Figure 1 shown, which includes an outer tube 1, a middle tube 2, an inner tube 3 and a terminal 4. A stent 5 is provided inside the outer tube 1. One end of the inner tube 3 is fixedly arranged inside one end of the stent 5, and the other end of the inner tube 3 extends to the outside of the outer tube 1 and is fixedly connected to the terminal 4. A repositioning device 6 is fixedly provided at one end of the stent 5 away from the inner tube 3. One end of the middle tube 2 is inserted into the inner part of the outer tube 1 and is fixedly connected to the repositioning device 6. A repositioning failure mark 7 and a repositioning start mark 8 are arranged on the tube wall of the middle tube 2. A front handle 14 is fixedly arranged on the tube wall of the outer tube 1, and a rear handle 15 is fixedly arranged on the tube wall of the middle tube 2. When the stent 5 is not fully released, that is, when the repositioning start mark 8 does not coincide with the proximal end of the front handle 14, at this time, medical staff hold the front handle 14 and the rear handle 15 with both hands respectively, keep the front handle 14 stationary, and slowly retract the rear handle 15, so that the middle tube 7 retracts and the stent 5 moves until the stent 5 is synchronously retracted into the outer tube 1. If the repositioning failure mark 7 exposes the proximal end of the front handle 14 and does not coincide with it, it indicates that the stent 5 has been fully retracted into the outer tube 1, and the retraction should be ended. If the repositioning failure mark 7 extends into the inner part of the outer tube 1 and the repositioning start mark 8 coincides with the proximal end of the front handle 14, it means that the stent 5 has been implanted into the body.
[0026] In order to enable the stent 5 not to slip off from the middle tube 2, as Figure 1-2As shown, the repositioning device 6 includes a main body 9. The main body 9 adopts a tubular structure. At one end of the main body 9, two curved hook heads 10 are symmetrically and fixedly arranged. One end of the main body 9 is fixedly connected to one end of the bracket 5 through the curved hook heads 10. At the other end of the main body 9, fixed saw teeth 11 are provided. The other end of the main body 9 is fixedly connected to one end of the middle tube 2 through the fixed saw teeth 11. In the middle of the outer wall of the main body 9, a push arm 12 in contact with one end of the bracket 5 is provided. The curved hook heads 10 are arranged inside one end of the bracket 5, so that the bracket 5 and the curved hook heads 10 will not slip during the process of retracting and repositioning the bracket 5, thus ensuring that the middle tube 2 and the bracket 5 will not separate, and the action of retracting the bracket 5 can be accurately completed. At the same time, the fixed saw teeth 11 can ensure that the main body 9 and the middle tube 2 are not easily separated.
[0027] In order to be able to display the position of the bracket 5, as Figure 1 shown, at one end of the outer tube 1 close to the terminal 4, a developing device 13 is provided. The developing device 13 can be a probe, and the developing device 13 is connected to an external display, so that the position of the release and repositioning of the bracket 5 can be viewed under the monitoring of external rays.
[0028] Finally, in order to be able to accurately control the moving distance of the outer tube 1 and the inner tube 2, as Figure 1 and 3 shown in -4, scale lines 16 are provided on the tube walls of both the outer tube 1 and the middle tube 2 to assist in the release and repositioning of the bracket 5.
[0029] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.
Claims
1. A relocatable stent inserter, comprising an outer tube (1), a middle tube (2), an inner tube (3) and a terminal (4), characterized in that: Inside the outer tube (1), there is a bracket (5). One end of the inner tube (3) is fixedly arranged inside one end of the bracket (5), and the other end of the inner tube (3) extends to the outside of the outer tube (1) and is fixedly connected to the terminal (4). At one end of the bracket (5) away from the inner tube (3), a repositioning device (6) is fixedly arranged. One end of the middle tube (2) is inserted into the inside of the outer tube (1) and is fixedly connected to the repositioning device (6). On the tube wall of the middle tube (2), there are a repositioning failure mark (7) and a repositioning start mark (8). The repositioning device (6) includes a main body (9). At one end of the main body (9), two curved hook heads (10) are symmetrically and fixedly arranged. One end of the main body (9) is fixedly connected to one end of the bracket (5) through the curved hook heads (10). At the other end of the main body (9), there are fixed saw teeth (11). The other end of the main body (9) is fixedly connected to one end of the middle tube (2) through the fixed saw teeth (11). In the middle of the outer wall of the main body (9), there is a push arm (12) in contact with one end of the bracket (5).
2. The relocatable stent introducer according to claim 1, wherein: The main body (9) adopts a tubular structure.
3. The relocatable stent inserter according to claim 1, wherein: At one end of the outer tube (1) close to the terminal (4), there is a developing device (13).
4. The relocatable stent introducer according to claim 1, characterized in that: On the tube wall of the outer tube (1), a front handle (14) is fixedly arranged. On the tube wall of the middle tube (2), a rear handle (15) is fixedly arranged.
5. The relocatable stent introducer according to claim 1, characterized in that: On the tube walls of both the outer tube (1) and the middle tube (2), there are scale lines (16).