Stent introducer
By designing a stent inserter including a shell, a stent carrier, a guide tube, a self-expanding bracket, a stent binding rope and an operating handle assembly, the problem of insufficient self-expanding bracket in the prior art is solved, and the accurate and safe placement of the self-expanding bracket in the human lesions is achieved.
Patent Information
- Application Number
- CN202420558928.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The existing stent inserter is not firm enough when the self-expanding stent enters the human lesions, and there is a risk of loosening and slipping, which increases the uncertainty of the operation and safety risks.
A stent placement is designed, including a housing, a stent carrier, a guide tube, a self-expanding bracket, a stent binding rope and an operating stent assembly. The self-expanding bracket is constrained and fixed to the bracket carrier by a bracket binding rope, and the accurate introduction and automatic expansion of the self-expanding bracket is achieved using a guide tube and operating handle assembly.
This technical solution improves the accuracy and safety of the self-expanding stent in the target position, avoids the risk of accidental release, simplifies the operation process, and enhances the convenience and safety during use.
Smart Images
Figure CN222533443U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a stent implanter, belonging to the technical field of medical equipment. Background Art
[0002] At present, with the continuous advancement of medical technology, interventional treatment methods such as stent implantation have become a vital part of modern medicine. Among them, stent implantation has become a widely used treatment method due to its less trauma and higher efficacy. Stents are medical devices that can be inserted into blood vessels to support the blood vessel wall and maintain smooth blood flow.
[0003] After searching the prior art, it was found that a Chinese patent with publication number CN2498993 disclosed a conveniently inserted bundled stent inserter. In the patent, a rubber ring was used to clamp the plumb line on the handle. During use, it was found that the fixed rubber ring was not firm enough when entering the lesion site of the human body, and there was a risk of loosening and slipping, which increased the uncertainty and safety hazards during surgery to a certain extent. Summary of the invention
[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a stent implanter, which can protect the self-expanding stent when it penetrates into the human lesion, avoid accidental release of the self-expanding stent, and is more convenient to operate.
[0005] In order to solve the above technical problems, the technical solution of the utility model is: a stent implanter suitable for implanting a self-expanding stent, comprising:
[0006] shell;
[0007] a bracket carrier, the bracket carrier being mounted in the housing;
[0008] A guide tube, the guide tube being slidably mounted outside the stent carrier;
[0009] Self-expanding stents;
[0010] a stent binding rope, the stent binding rope being suitable for constraining and fixing the self-expanding stent on the stent carrier, and the stent binding rope being provided with a release line connected to the guide tube;
[0011] An operating pressure handle assembly, one end of which is hinged to the shell and the other end is hinged to the guide tube. The operating pressure handle assembly is suitable for being pressed and driving the guide tube to move within the shell to pull the release line of the connected stent binding rope to release the self-expanding stent on the stent carrier extending out of the guide tube.
[0012] Furthermore, in order to limit the position of the self-expanding stent on the stent carrier, the stent implanter further includes a stent limiting mechanism, and the stent limiting mechanism includes a pair of annular limiting blocks;
[0013] The outer peripheral surface of the support carrier is provided with an external thread;
[0014] The pair of annular limit blocks are provided with internal threads that cooperate with the bracket carrier;
[0015] The self-expanding stent is suitable for abutting between the pair of annular stop blocks.
[0016] Furthermore, in order to facilitate the determination of the position of the self-expanding stent during implantation, an indicator development ring is provided on the annular limit block.
[0017] Further, in order to facilitate the length adjustment, the guide tube includes a movable guide tube and an extension tube;
[0018] The movable guide tube is hinged to the operating pressure handle assembly;
[0019] The extension tube is detachably mounted on the movable guide tube.
[0020] Furthermore, the movable guide tube includes a movable limiting section and an abutting contact section;
[0021] A limited opening is provided on the outer wall of the shell;
[0022] A limiting protrusion matching with the limiting opening is provided on the outer peripheral surface of the movable limiting section;
[0023] The limiting protrusion is suitable for moving along the limiting opening.
[0024] Furthermore, in order to facilitate the movement of the locking guide tube, a locking notch is provided on the limiting opening;
[0025] The limiting protrusion is suitable for being embedded in the locking notch to lock the movement of the guide tube.
[0026] Furthermore, in order to facilitate the deeper insertion of the guide tube, a guide cone head is provided at the distal end of the guide tube.
[0027] Further, in order to be able to adjust the stent carrier, an opening is provided at the proximal end of the housing;
[0028] The stent implanter further comprises a stent carrier adjustment handle, the stent carrier adjustment handle is limitedly slidably installed in the shell, and the stent carrier adjustment handle partially extends out of the opening to the outside of the shell;
[0029] One end of the support carrier is fixed in the support carrier adjustment handle.
[0030] Furthermore, a specific structure of an operating pressure handle assembly is provided, and the operating pressure handle assembly comprises:
[0031] A control handle, one end of which is hinged to the housing;
[0032] A connecting rod, one end of which is hinged to the middle part of the operating handle, and the other end of which is hinged to the guide tube.
[0033] Furthermore, the stent implanter further comprises a return spring, one end of which abuts against the inner wall of the shell, and the other end of which abuts against the end of the guide tube.
[0034] By adopting the above technical solution, the utility model has the following beneficial effects:
[0035] In the utility model, the self-expanding stent is tied to the stent carrier using a stent binding rope before use, and then the self-expanding stent tied to the stent carrier is accurately introduced into the position of the human lesion where the self-expanding stent is needed using a guide tube. When the predetermined position is reached, the operating handle assembly is pressed to drive the guide tube to move backward, and the internal self-expanding stent extends from the front end of the guide tube. At this time, the release line connected to the guide tube releases the stent binding rope under the pull of the guide tube, and the self-expanding stent expands and resets to the expanded state by itself. Finally, the guide tube and the stent carrier are pulled out of the self-expanding stent position. This process allows the self-expanding stent to be accurately and automatically expanded and formed at the target position, thereby simplifying the operation, improving accuracy and safety, and avoiding the risk of accidental release of the self-expanding stent.
[0036] In addition, the annular limit block cooperates with the external thread on the stent carrier through the internal thread, ensuring the stability of the self-expanding stent during placement; at the same time, the limit protrusion cooperates with the limit opening during operation, and the setting of the locking notch ensures the accuracy of the operation. The guide cone head and other structures also help reduce tissue damage and facilitate the safe release of the self-expanding stent. These further enhance the convenience and safety of use.
[0037] In summary, the utility model not only ensures the reliability and stability of the self-expanding stent during placement, but also simplifies the operation process, brings convenience to the user and reduces medical risks. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Figure 1 The three-dimensional structure of the stent implanter of the present invention is shown in FIG. Figure 1 ;
[0039] Figure 2 The three-dimensional structure of the stent implanter of the present invention is shown in FIG. Figure 2 ;
[0040] Figure 3It is a schematic diagram of a half-section structure of the stent implanter of the present invention;
[0041] Figure 4 for Figure 3 A partial enlarged view of part A in the middle. DETAILED DESCRIPTION
[0042] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.
[0043] like Figure 1-4 As shown, a stent inserter, suitable for inserting a self-expanding stent 400, comprises:
[0044] Housing 100;
[0045] A support carrier 300, the support carrier 300 is installed in the housing 100;
[0046] A guide tube 200, the guide tube 200 is slidably mounted outside the stent carrier 300;
[0047] Self-expanding stent 400;
[0048] A stent binding rope, which is suitable for constraining and fixing the self-expanding stent 400 on the stent carrier 300, and a release line connected to the guide tube 200 is provided on the stent binding rope;
[0049] An operating pressure handle assembly is hinged at one end to the housing 100 and at the other end to the guide tube 200. The operating pressure handle assembly is suitable for being pressed and driving the guide tube 200 to move within the housing 100 to pull the release line of the connected stent binding rope to release the self-expanding stent 400 on the stent carrier 300 extending out of the guide tube 200.
[0050] In this embodiment, if Figure 1 and Figure 3-4 As shown, before use, the self-expanding stent is tied to the stent carrier with a stent binding rope, and then the self-expanding stent 400 tied to the stent carrier 300 is accurately introduced into the position where the human lesion needs the self-expanding stent using the guide tube 200. When it reaches the predetermined position, the operating handle assembly is pressed to drive the guide tube 200 to move backward, and the internal self-expanding stent 400 extends from the front end of the guide tube 200. At this time, the release line connected to the guide tube 200 releases the stent binding rope under the pull of the guide tube 200, and the self-expanding stent 400 expands and resets to the expanded state by itself. Finally, the guide tube and the stent carrier are pulled out of the self-expanding stent position. This process allows the self-expanding stent 400 to be accurately and automatically expanded and formed at the target position, thereby simplifying the operation, improving accuracy and safety, and avoiding the risk of accidental release of the self-expanding stent 400.
[0051] Specifically, Figure 3-4 As shown, the stent implanter further includes a stent limiting mechanism, and the stent limiting mechanism includes a pair of annular limiting blocks 301;
[0052] The outer peripheral surface of the support carrier 300 is provided with external threads;
[0053] A pair of annular limit blocks 301 are provided with internal threads that cooperate with the bracket carrier 300;
[0054] The self-expanding stent 400 is suitable for abutting between a pair of annular stop blocks 301 .
[0055] In this embodiment, if Figure 3-4 As shown, the stent limiting mechanism limits and fixes the position of the self-expanding stent 400 on the stent carrier 300 to prevent it from sliding when released. During assembly, a pair of annular limiting blocks 301 are first connected to the stent carrier 300 through internal and external threads. Then the self-expanding stent 400 is placed in the space between the two annular limiting blocks 301, and is tied and fixed to the stent carrier 300 with a stent binding rope. In this way, the installation of the self-expanding stent 400 on the stent carrier 300 is completed, and the diameter size of the self-expanding stent 400 after expansion is larger than the diameter size of the annular limiting blocks 301.
[0056] Specifically, Figure 4 As shown, an indicating developing ring is provided on the annular limiting block 301 .
[0057] In this embodiment, if Figure 4 As shown, the indicating developing ring is mainly used to observe the release position of the self-expanding stent 400 through imaging equipment during the operation, so as to improve the accuracy and visualization of the operation.
[0058] Specifically, Figure 1 and Figure 3 As shown, the guide tube 200 includes a movable guide tube and an extension tube 202;
[0059] The movable guide tube is hinged to the operating pressure handle assembly;
[0060] The extension tube 202 is detachably mounted on the movable guide tube.
[0061] In this embodiment, if Figure 1 and Figure 3As shown, the movable guide tube is responsible for connecting with the operating pressure handle assembly. The function of the extension tube 202 is to extend the effective length of the guide tube 200 to adapt to different surgical sites and path requirements. The extension tube 202 can be detachably mounted on the movable guide tube, so that it is convenient to select extension tubes 202 of different lengths according to specific circumstances. This modular design improves the scope of application and practicality. The extension tube 202 and the movable guide tube can be connected by thread, or by snap-fit connection or other reliable detachable connection methods.
[0062] Specifically, Figure 1-3 As shown, the movable guide tube includes a moving limit section and an abutting contact section;
[0063] A limited opening is provided on the outer wall of the housing 100;
[0064] A limiting protrusion 203 matching with the limiting opening is provided on the outer peripheral surface of the movable limiting section;
[0065] The limiting protrusion 203 is suitable for moving along the limiting opening.
[0066] In this embodiment, if Figure 1-2 As shown, the limiting protrusion 203 on the movable limiting section can accurately guide the moving direction and moving range of the movable guide tube along the limiting opening. The abutting contact section is used to contact the return spring 600 and is hinged to the operating handle assembly. When the handle assembly is operated, the movable guide tube will slide back and forth in the limiting opening along the limiting protrusion 203. The limiting opening limits the movement direction and travel range of the movable guide tube. The shape of the limiting protrusion 203 can be rectangular, polygonal, etc., and the shape of the limiting opening matched therewith can also be changed. The number of limiting protrusions 203 can also be increased, and set to multi-point limiting to further improve stability.
[0067] Specifically, Figure 1-2 As shown, a locking notch is provided on the limit opening;
[0068] The limiting protrusion 203 is adapted to be embedded in the locking notch to lock the movement of the guide tube 200 .
[0069] In this embodiment, if Figure 1-2 As shown, the locking notch provides a reliable locking position. When the limiting protrusion 203 is inserted into the locking notch, the movable guide tube can be firmly fixed to keep it in a locked displacement state to prevent accidental movement. When locking is required, the operator controls the guide tube 200 to move to the locking position so that the limiting protrusion 203 is accurately inserted into the locking notch. When unlocking, the limiting protrusion 203 can be disengaged from the locking notch by applying appropriate force, thereby restoring the sliding ability of the guide tube 200.
[0070] Specifically, Figure 1As shown, the distal end of the guide tube 200 is provided with a guide cone.
[0071] In this embodiment, if Figure 1-2 As shown, the guide cone head can be a cone or conical structure, and is located at the front end of the guide tube 200. Its main function is to guide and gradually expand the inner wall of the blood vessel during the deep penetration of the guide tube 200, so as to prepare for the final release.
[0072] Specifically, Figure 1-4 As shown, the proximal end of the housing 100 is provided with an opening;
[0073] The stent inserter further includes a stent carrier adjustment handle 110, which is limitedly slidably installed in the housing 100, and a portion of the stent carrier adjustment handle 110 extends out of the opening to the outside of the housing 100;
[0074] One end of the support carrier 300 is fixed in the support carrier adjustment handle 110 .
[0075] In this embodiment, if Figure 1-4 As shown, by adjusting the position of the stent carrier adjustment handle 110, the front-back displacement of the stent carrier 300 in the housing 100 can be adjusted, thereby adjusting the release depth and position of the self-expanding stent 400. This facilitates precise control of the final release position of the self-expanding stent 400.
[0076] Specifically, Figure 1-3 As shown, the operating handle assembly may have the following structure:
[0077] A manipulation handle 510, one end of which is hinged to the housing 100;
[0078] The connecting rod 520 has one end hinged to the middle of the operating handle 510 and the other end hinged to the guide tube 200 .
[0079] In this embodiment, if Figure 1-3 As shown, one end of the operating handle 510 is hingedly mounted on the housing 100 and can rotate around the hinge point. One end of the connecting rod 520 is hingedly connected to the middle of the operating handle 510, and the other end is hingedly connected to the guide tube 200. By pressing the operating handle 510, the connecting rod 520 can drive the guide tube 200 to slide forward and backward in the housing 100.
[0080] Specifically, Figure 1-2 As shown, the stent implanter further includes a return spring 600 , one end of the return spring 600 abuts against the inner wall of the housing 100 , and the other end abuts against the end of the guide tube 200 .
[0081] In this embodiment, if Figure 1-2As shown, the main function of the return spring 600 is to automatically return the guide tube 200 to the original position after the operating handle assembly is released. It provides the ability of automatic return for the movement of the guide tube 200, and the return spring 600 also partially abuts on the operating handle assembly.
[0082] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A stent inserter, suitable for inserting a self-expanding stent (400), characterized in that: include: Shell(100); A support carrier (300), the support carrier (300) being installed in the housing (100); A guide tube (200), the guide tube (200) being slidably mounted outside the stent carrier (300); a stent binding rope, the stent binding rope being suitable for constraining and fixing the self-expanding stent (400) on the stent carrier (300), the stent binding rope being provided with a release line connected to the guide tube (200); An operating pressure handle assembly, one end of which is hinged to the housing (100) and the other end of which is hinged to the guide tube (200), and the operating pressure handle assembly is suitable for being pressed and driving the guide tube (200) to move within the housing (100) to pull the release line of the connected stent binding rope to release the self-expanding stent (400) on the stent carrier (300) extending out of the guide tube (200).
2. The stent implanter according to claim 1, characterized in that: It also includes a bracket limiting mechanism, the bracket limiting mechanism comprising a pair of annular limiting blocks (301); The outer peripheral surface of the support carrier (300) is provided with external threads; The pair of annular limit blocks (301) are provided with internal threads that cooperate with the bracket carrier (300); The self-expanding stent (400) is suitable for abutting between the pair of annular limiting blocks (301).
3. The stent implanter according to claim 2, characterized in that: The annular limiting block (301) is provided with an indicating developing ring.
4. The stent implanter according to claim 1, characterized in that: The guide tube (200) comprises a movable guide tube and an extension tube (202); The movable guide tube is hinged to the operating pressure handle assembly; The extension tube (202) is detachably mounted on the movable guide tube.
5. The stent implanter according to claim 4, characterized in that: The movable guide tube comprises a movable limiting section and an abutting contact section; A limited opening is provided on the outer wall of the housing (100); A limiting protrusion (203) matching with the limiting opening is provided on the outer peripheral surface of the movable limiting section; The limiting protrusion (203) is suitable for moving along the limiting opening.
6. The stent implanter according to claim 5, characterized in that: The limiting opening is provided with a locking notch; The limiting protrusion (203) is suitable for being embedded in the locking notch to lock the movement of the guide tube (200).
7. The stent implanter according to claim 1, characterized in that: The distal end of the guide tube (200) is provided with a guide cone head.
8. The stent implanter according to claim 1, characterized in that: The proximal end of the housing (100) is provided with an opening; It also comprises a support carrier adjustment handle (110), the support carrier adjustment handle (110) is limitedly slidably installed in the housing (100), and the support carrier adjustment handle (110) partially extends out of the opening to the outside of the housing (100); One end of the support carrier (300) is fixed in the support carrier adjustment handle (110).
9. The stent implanter according to claim 1, characterized in that: The operating handle assembly comprises: A manipulation handle (510), one end of the manipulation handle (510) being hinged to the housing (100); A connecting rod (520), one end of the connecting rod (520) is hinged to the middle part of the operating handle (510), and the other end is hinged to the guide tube (200).
10. The stent implanter according to claim 1, characterized in that: It also includes a return spring (600), one end of the return spring (600) abuts against the inner wall of the housing (100), and the other end of the return spring (600) abuts against the end of the guide tube (200).