Safe knot pusher
By designing a safety knot pusher with a closed loop structure, the problems of midline slippage and accidental damage in existing knot pushers during minimally invasive thoracic surgery have been solved, achieving higher safety and operational efficiency.
Patent Information
- Application Number
- CN202423159252.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing suture pushers are prone to suture slippage or accidental damage in minimally invasive thoracic surgery, and their operation is not flexible enough, posing safety risks.
A safety knot pusher was designed, comprising an operating handle, a fixed rod, and a movable rod. Through a closed loop structure, the second hook of the movable rod is controlled by a push block to approach the first hook to form a closed loop, which limits the slippage of the line and blocks other lines and instruments, ensuring safety.
It improves the safety and efficiency of suture ligation in minimally invasive thoracic surgery, avoids suture slippage and accidental injury, and enhances the flexibility and reliability of the operation.
Smart Images
Figure CN223930187U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of medical devices, and in particular to a safety knot pusher. Background Technology
[0002] In surgical procedures, ligation of blood vessels and suturing of tissues are routine and frequently performed procedures. In minimally invasive thoracic surgery, the ligation of silk sutures is usually done externally first, and then a knot pusher is used to push the knot into the thoracic cavity and tighten it. Therefore, the knot pusher is an indispensable instrument in minimally invasive thoracic surgery.
[0003] Currently, there are two main types of commonly used suture pushers: one is a thin rod with a Y-shaped tip, and the other is a stainless steel rod with a hook-shaped tip. Both types of pushers are relatively slender, occupying little space during use and offering greater operational flexibility. However, they also have certain drawbacks. With a Y-shaped pusher, the suture must maintain a certain tension to keep it continuously within the Y-groove and advance. If interference occurs during the push process or the suture tension is too low, the suture can easily slip out of the Y-groove, leading to pusher failure. Maintaining suture tension requires continuous traction on the ligated blood vessels or other tissues, which may cause small blood vessel rupture or tissue tearing. While the hook-shaped pusher keeps the suture relatively secure within the hook, the open end of the hook can easily snag on the suture, other instruments, or blood vessels in blind spots when entering or exiting the chest cavity, potentially causing accidental injury. Utility Model Content
[0004] The purpose of this utility model is to provide a safe knot pusher, which has the advantages of being easy to use, safe and reliable, and will not cause accidental damage.
[0005] To achieve the above objectives, the solution of this utility model is:
[0006] A safety pusher includes an operating handle, a fixed rod, and a movable rod;
[0007] The front end of the fixing rod has a first hook, and the rear end is connected and fixed to the operating handle;
[0008] The movable rod has a second hook at the front end and slides onto the operating handle at the rear end. The rear end of the movable rod is connected to a push block that protrudes from the operating handle. The push block is used to move the movable rod back and forth, so that the second hook is close to or away from the first hook.
[0009] The front end of the second hook is used to push the line. When the second hook is close to the first hook, the ends of the two are connected to form a closed loop, and the ends of the second hook and the first hook do not protrude beyond the closed loop.
[0010] Furthermore, the operating handle has a hollow movable space inside, and the outer wall of the operating handle has a long slot window that connects to the movable space, and the long slot window extends back and forth; the rear end of the movable rod is inserted into the movable space and connected to a sliding component that is slidably assembled inside the operating handle, and one side of the sliding component has a push block that extends out of the long slot window, the push block can move back and forth in the long slot window, and drive the movable rod to move back and forth.
[0011] Furthermore, an elastic element is provided between the rear end of the slider and the rear side of the active space. The elastic element pushes the slider forward, causing the push block to be located in front of the long slot window, and causing the second hook to elastically fit against the first hook.
[0012] Furthermore, the slider and the operating handle are cylindrical structures with inner and outer sleeves, and both the slider and the operating handle have open ends; an end cap is screwed to the open end of the operating handle; the elastic element is a spring, the front end of which extends into the open end of the slider and abuts against the slider, and the rear end of the spring abuts against the end cap on the rear side of the movable space.
[0013] Furthermore, a long sleeve is provided side by side on one side of the fixed rod, with the front end of the long sleeve spaced apart from the first hook and the rear end connected to the operating handle and communicating with the movable space; the movable rod is inserted inside the long sleeve, and the second hook at the front end of the movable rod extends out of the front end of the long sleeve.
[0014] Furthermore, the operating handle is a long rectangular body with a frustum at the front end.
[0015] Furthermore, both the movable rod and the fixed rod extend longitudinally front to back and are spaced apart vertically; the second hook of the movable rod is a straight rod that is laterally bent and extended, and the end of the straight rod has a second groove; the first hook and the second hook are on the same side and are bent in a "U" or "V" shape, and the end of the bent rod has a first groove. When the first groove is movably engaged with the second groove, the straight rod and the bent rod form the closed collar.
[0016] Furthermore, the safety pusher is made entirely of stainless steel.
[0017] By adopting the above technical solution, the suture pusher, equipped with a closed loop, allows the second hook of the movable rod to approach the first hook via a push block. This forms a closed loop during suture pushing, ensuring the suture remains within the loop and preventing it from slipping out. Simultaneously, the closed loop also prevents other sutures and instruments from being pulled outside, ensuring the pusher will not accidentally pull on other sutures or instruments during operation, thus avoiding accidental injury. This suture pusher effectively improves the safety and efficiency of suture ligation in minimally invasive thoracic surgery. Attached Figure Description
[0018] Figure 1 This is a perspective view of an embodiment of the present utility model;
[0019] Figure 2 This is a schematic diagram illustrating the usage state of an embodiment of the present invention;
[0020] Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model;
[0021] Figure 4 This is a cross-sectional view of an embodiment of the present utility model;
[0022] Figure 5 This is an exploded view of an embodiment of the present invention.
[0023] Labeling: 1. Operating handle; 11. Movable space; 12. Long slot window; 13. End cap; 2. Fixing rod; 21. First hook; 211. First slot; 3. Movable rod; 31. Second hook; 311. Second slot; 32. Sliding part; 321. Push block; 4. Closing ring; 5. Elastic part; 6. Long sleeve. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of 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. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] like Figures 1 to 5 As shown, a safety pusher in this embodiment includes an operating handle 1, a fixed rod 2, and a movable rod 3.
[0026] The front end of the fixing rod 2 has a first hook 21, and the rear end is connected and fixed to the operating handle 1;
[0027] The movable rod 3 has a second hook 31 at the front end and slides to the operating handle 1 at the rear end. The rear end of the movable rod 3 is connected to a push block 321 that protrudes from the operating handle 1. The push block 321 is used to drive the movable rod 3 to move back and forth, so that the second hook 31 is close to or away from the first hook 21.
[0028] The front end of the second hook 31 is used to push the line. When the second hook 31 is close to the first hook 21, the ends of the two are connected to form a closed loop 4, and the ends of the second hook 31 and the first hook 21 do not protrude beyond the range of the closed loop 4.
[0029] Therefore, the suture pusher of this embodiment, by being equipped with a closed loop 4, allows the second hook 31 of the movable rod 3 to approach the first hook 21 via the push block 321, forming a closed loop 4 when pushing the suture. This ensures the suture is contained within the closed loop 4, preventing it from slipping off. Simultaneously, the formed closed loop 4 also blocks other sutures and instruments from entering, ensuring that the suture pusher will not accidentally pull on other sutures or instruments during operation, thus avoiding accidental injury. This suture pusher can effectively improve the safety and efficiency of suture ligation in minimally invasive thoracic surgery.
[0030] In this embodiment, both the movable rod 3 and the fixed rod 2 can extend longitudinally forward and backward and are spaced vertically; the second hook 31 of the movable rod 3 is a straight rod that is laterally bent and extended, and the end of the straight rod has a second slot 311; the first hook 21 and the second hook 31 are on the same side and are bent in a "U" or "V" shape, and the end of the bent rod has a first slot 211. When the first slot 211 is movably fitted into the second slot 311, the straight rod and the bent rod form the closed collar 4, which can improve the sealing effect of the closed collar 4.
[0031] Specifically, such as Figure 4 In this embodiment, the operating handle 1 may have a hollow movable space 11 inside, and the outer wall of the operating handle 1 has a long slot window 12 that communicates with the movable space 11. The long slot window 12 extends back and forth. The rear end of the movable rod 3 can be inserted into the movable space 11 and is connected to a sliding member 32 that is slidably assembled inside the operating handle 1. One side of the sliding member 32 has a push block 321 that extends out of the long slot window 12. The push block 321 can move back and forth in the long slot window 12 and drive the movable rod 3 to move back and forth.
[0032] See also Figure 5 To improve the ease of use of the knot pusher, an elastic element 5 can be provided between the rear end of the sliding member 32 and the rear side of the movable space 11. In this embodiment, the elastic element 5 is exemplified by a spring. The elastic element 5 can push the sliding member 32 forward while simultaneously positioning the push block 321 in front of the long slot window 12, and can also allow the second hook 31 to elastically adhere to the first hook 21. Therefore, when using this knot pusher, refer to... Figure 2 By pushing the pusher block 321 backward to squeeze the elastic member 5, the second hook 31 is driven to open the closed collar 4. After the line is inserted into the closed collar 4, the pusher block 321 is released, and the elastic member 5 can push against the sliding member 32 and the movable rod 3 to move forward, so that the second hook 31 automatically fits against the first hook 21 to reform the closed collar 4. During use, it can ensure that the line is stably confined within the closed collar 4.
[0033] Specifically, the sliding member 32 and the operating handle 1 are cylindrical structures with inner and outer sleeves, and both the sliding member 32 and the operating handle 1 have open ends; the operating handle 1 has an end cap 13 screwed to the open end of the operating handle 1; the elastic member 5 is a spring, the front end of which extends into the open end of the sliding member 32 and abuts against the sliding member 32, and the rear end of the spring abuts against the end cap 13 on the rear side of the movable space 11.
[0034] Furthermore, a long sleeve 6 is arranged side by side on one side of the fixed rod 2. The front end of the long sleeve 6 is spaced apart from the first hook 21, and the rear end is connected to the operating handle 1 and communicates with the movable space 11. The movable rod 3 passes through the long sleeve 6, and the second hook 31 at the front end of the movable rod 3 extends out of the front end of the long sleeve 6. By setting the long sleeve 6, the movable rod 3 can be limited and guided, ensuring that the movement of the movable rod 3 is stable and does not wobble, and allowing the second hook 31 to accurately fit against the first hook 21.
[0035] In this embodiment, the operating handle 1 is a long rectangular body with a truncated cone at the front end, so as to facilitate gripping, use and placement.
[0036] In this embodiment, the safety pusher can be made entirely of stainless steel to facilitate cleaning and disinfection, ensuring cleanliness and hygiene.
[0037] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.
[0038] In the description of the embodiments of this application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.
Claims
1. A safety knot pusher, characterized in that: Includes operating handle, fixed rod, and movable rod; The front end of the fixing rod has a first hook, and the rear end is connected and fixed to the operating handle; The movable rod has a second hook at the front end and slides onto the operating handle at the rear end. The rear end of the movable rod is connected to a push block that protrudes from the operating handle. The push block is used to move the movable rod back and forth, so that the second hook is close to or away from the first hook. The front end of the second hook is used to push the line. When the second hook is close to the first hook, the ends of the two are connected to form a closed loop, and the ends of the second hook and the first hook do not protrude beyond the closed loop.
2. The safety pusher according to claim 1, characterized in that: The operating handle has a hollow movable space inside, and the outer wall of the operating handle has a long slot window that connects to the movable space. The long slot window extends back and forth. The rear end of the movable rod is inserted into the movable space and connected to a sliding component that is slidably assembled inside the operating handle. One side of the sliding component has a push block that extends out of the long slot window. The push block can move back and forth within the long slot window and drive the movable rod to move back and forth.
3. A safety pusher according to claim 2, characterized in that: An elastic element is provided between the rear end of the slider and the rear side of the active space. The elastic element pushes the slider forward, causing the push block to be located in front of the long slot window, and causing the second hook to elastically fit against the first hook.
4. A safety pusher according to claim 3, characterized in that: The slider and the operating handle are cylindrical structures with inner and outer sleeves, and both the slider and the operating handle have open ends; an end cap is screwed to the open end of the operating handle; the elastic element is a spring, the front end of which extends into the open end of the slider and abuts against the slider, and the rear end of the spring abuts against the end cap on the rear side of the movable space.
5. A safety pusher according to claim 2, characterized in that: The fixed rod is provided with a long sleeve on one side, with the front end of the long sleeve spaced apart from the first hook and the rear end connected to the operating handle and communicating with the movable space; the movable rod is inserted inside the long sleeve, and the second hook at the front end of the movable rod extends out of the front end of the long sleeve.
6. A safety pusher according to claim 1, characterized in that: The operating handle is a long rectangular body with a frustum at the front end.
7. A safety pusher according to claim 1, characterized in that: Both the movable rod and the fixed rod extend longitudinally forward and backward and are spaced vertically; the second hook of the movable rod is a straight rod that is laterally bent and extended, and the end of the straight rod has a second groove; the first hook and the second hook are on the same side and are bent in a "U" or "V" shape, and the end of the bent rod has a first groove. When the first groove is movably engaged with the second groove, the straight rod and the bent rod form the closed collar.
8. A safety pusher according to claim 1, characterized in that: The safety pusher is made entirely of stainless steel.