Wire passing device
By designing a line passer including handle and rod body assembly, using the outer rod and core rod structure connected by elastic components, the problem of blind spots in the visual field during knee ligament reconstruction is solved, and efficient introduction and rapid export of traction lines are achieved.
Patent Information
- Application Number
- CN202421853158.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-08-01
AI Technical Summary
In knee ligament reconstruction, during the implantation of the posterior cruciate ligament, the blind spots in the visual field due to the bone tunnel angle problem. The traditional method is inefficient and troublesome, making it difficult to efficiently introduce the traction line.
A wire passer is designed, including a handle and a rod body assembly, and the outer rod, the first core rod and the second core rod connected by the elastic assembly are used to achieve efficient introduction of the traction line and avoid blind spots in the field of view.
The efficiency of tibial lateral line is improved, the device is simple and easy to operate, and the problem of blind spots in the field of vision is solved, and the rapid export of traction lines is realized.
Smart Images
Figure CN223248369U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and more specifically, relates to a wire passer. Background Art
[0002] During knee ligament reconstruction surgery, during the posterior cruciate ligament traction and implantation process, since the posterior cruciate ligament needs to be implanted from the distal femur to the proximal tibia, due to the human body structure, the two bone tunnels here are in a crossed state. During the operation, a traction wire is generally introduced from the anterior medial bone cortical surface of the proximal tibia to 2 cm below the posterior and outer sides of the knee joint, and then the traction wire is pulled out from the posterior gap of the knee joint. Due to the angle of the bone tunnel, there will be a blind spot in the posterior gap of the knee joint. The traditional method is to use wire grasping pliers to repeatedly search and then clamp the traction wire and pull it out, which is inefficient and troublesome.
[0003] Therefore, there is an urgent need in this field to provide a wire passer to solve the above technical problems. Utility Model Content
[0004] In order to solve the above technical problems, the utility model discloses a wire passer, a wire passer, which includes a handle and a rod body assembly, the rod body assembly including an outer rod, a first core rod and a second core rod; the outer rod and the first core rod are coaxially connected through an elastic assembly, the handle is provided with a push-core structure, the first core rod is embedded in the push-core structure, and the outer rod extends outward in a direction away from the handle; the second core rod passes through the interior of the first core rod, the elastic assembly and the outer rod and extends outward.
[0005] Preferably, the core pushing structure includes a pushing block and a sliding block that can slide in coordination.
[0006] Preferably, the push block and the sliding block are engaged with each other or connected by screws.
[0007] Preferably, the first core rod is embedded in the slider.
[0008] Preferably, a limiting step is provided in the slider and is fitted onto the outer wall of the first core rod, and the central axis of the limiting step coincides with the central axis of the first core rod.
[0009] Preferably, one end of the slider is provided with an abutting step abutting against the end of the first core rod.
[0010] Preferably, the first core rod is a variable diameter structure, and the diameter of the first core rod sleeved within the limiting step is smaller than the diameter of the first core rod sleeved outside the limiting step.
[0011] Preferably, a groove for accommodating the elastic component is provided in the slider.
[0012] Preferably, the handle is further provided with a slide groove, the slide groove has a slide groove track, and the push core structure is arranged in the slide groove and moves along the slide groove track.
[0013] Preferably, the end of the outer rod extending toward the interior of the handle is a trumpet-shaped structure. The front end of the handle is provided with a sleeve head for sleeve-fitting the outer rod.
[0014] Preferably, the end of the second core rod passing through the interior of the outer rod and extending outward is provided with a ring.
[0015] Preferably, an end cap is provided at the end of the handle.
[0016] Compared with the prior art, the wire guide of the present application has the following features:
[0017] The wire guide of the present application is constructed by embedding a first core rod of a rod assembly into a core push structure. The outer rod and the first core rod are coaxially connected by an elastic assembly. A second core rod extends outward through the interior of the first core rod, the elastic assembly, and the outer rod. When the core push structure moves forward, the elastic assembly is deformed by force, and the first core rod can drive the second core rod and the outer rod forward. During the recovery process, the elastic assembly can reversely push the core push structure back to its initial position. During knee ligament reconstruction surgery, a traction wire can be first fixed to the outwardly extending end of the second core rod. The outwardly extending portion of the rod assembly of the wire guide is then inserted into the bone tunnel from the anterior medial surface of the proximal tibia. After reaching the predetermined position, the core push structure of the wire guide is pushed forward, pushing the traction wire from the posterior exit of the bone tunnel toward the posterior tibial platform, avoiding the blind spot and directly exposing the traction wire to the field of vision. The traction wire can then be pulled out at the intercondylar position, effectively eliminating the blind spot and greatly improving the efficiency of tibial wire guiding. The wire passer of the present application is lightweight, simple in structure, and easy to operate. The basic principle of the product can effectively solve the problems currently encountered in clinical practice. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 is a cross-sectional view of an embodiment of the present application;
[0020] Figure 2 This is a front view of an embodiment of the present application;
[0021] Figure 3 is a top view of an embodiment of the present application;
[0022] Figure 4 This is a cross-sectional view of the core pushing structure of an embodiment of the present application;
[0023] Figure 5 is a cross-sectional view of the first core rod of an embodiment of the present application;
[0024] Figure 6 This is a front view of the outer rod of the embodiment of the present application;
[0025] Figure 7 This is a left side view of the second core rod of the embodiment of the present application;
[0026] Figure 8 This is a front view of the second core rod of the embodiment of the present application;
[0027] In the figure, 1-handle, 2-rod body assembly, 3-end cover, 11-pushing core structure, 22-outer rod, 23-second core rod, 24-elastic component, 111-pushing block, 112-slider, 113-screw. DETAILED DESCRIPTION
[0028] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.
[0029] References to "one embodiment" or "embodiment" herein refer to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the terms "upper," "top," "bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplification of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly specifying the number of the technical features referred to. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features. Furthermore, the terms "first," "second," and the like are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.
[0030] Reference Figure 1-3 As shown, an embodiment of the present application provides a wire passer, including a handle 1 and a rod assembly 2. The handle 1 is provided with a core push structure 11. The rod assembly 2 includes an outer rod 22, a first core rod 21, and a second core rod 23. The first core rod 21 is embedded in the core push structure 11. The outer rod 22 and the first core rod 21 are coaxially connected by an elastic assembly 24. The second core rod 22 passes through the first core rod 21, the elastic assembly 24, and the outer rod 22 in sequence. One end of the second core rod 22 is fixed in the first core rod 21 and extends outward. When an external force pushes the core push structure 11, the first core rod 21, the second core rod 22 and the core push structure 11 move in coordination. When the external force is removed or weakened, the elastic assembly 24 gradually recovers its deformation, pushing the core push structure 11, the first core rod 21, and the second core rod 22 in reverse. Since the outer rod 22 and the second core rod 23 both extend outward in a direction away from the handle 1 and extend in the same direction, the second core rod 23 can reciprocate inside the outer rod 22 and is protected by the outer rod 22 to prevent the second core rods 23 from being entangled with each other and causing plastic deformation.
[0031] In some embodiments, the outwardly extending end of the outer rod 22 is provided with a bending portion, and the second core rod 22 is a shape memory alloy, specifically, nickel-titanium alloy, with a preset curvature, and can automatically restore the original preset curvature after passing through the medullary canal.
[0032] In some embodiments, the elastic component 24 may be a spring or other elastic material.
[0033] In some possible implementations, reference Figure 4 As shown, the core-pushing structure 11 includes a push block 111 and a slider 112 that can slide in coordination. Specifically, to achieve the effect of overall sliding of the core-pushing structure 11, the push block 111 and the slider 112 can be interlocked or fixed by screws 113 that pass through the push block 111 and then into the slider 112, allowing the push block 111 and the slider 112 to slide in coordination. The first core rod 21 is embedded in the slider 112. When the push block 111 slides, it can drive the slider 112 and the first core rod 21 to slide in unison.
[0034] In some possible implementations, reference Figure 1-3 As shown, a slide groove is provided in the handle 1, and a slide groove track is provided in the slide groove. The core pushing structure 11 is provided in the slide groove and moves back and forth along the slide groove track. While the slide groove limits the moving distance of the core pushing structure 11, it can also prevent the core pushing structure from deviating from the direction when moved by external force, thereby affecting the positioning of the end of the rod body assembly.
[0035] In some feasible solutions, in order to better fix the first core rod 21 in the core pushing structure 11, a limiting step is provided inside the core pushing structure 11, specifically inside the slider 112, which can be fitted onto the outer wall of the first core rod 21. The central axis of the limiting step coincides with the central axis of the first core rod 21. Accordingly, the second core rod 21 is a variable diameter structure. The diameter of the first core rod 21 fitted into the limiting step is smaller than the diameter of the first core rod 21 fitted outside the limiting step. Figure 5 shown.
[0036] In some specific embodiments, an abutting step is further provided at one end of the slider 112 to abut against the end of the second core rod 21, thereby preventing the second core rod 21 from sliding out of the core-pushing structure 11 under force. Specifically, a cavity accommodating the larger diameter of the second core rod 21 can be formed between the abutting step and the limiting step, thereby better embedding and fixing the second core rod 21 in the core-pushing structure 11.
[0037] In addition, the first core rod 21 has a hollow structure, wherein the diameter of the hollow structure matches the outer diameter of the second core rod 22 , so that the second core rod 22 can be fixed in the first core rod 21 .
[0038] In some possible implementations, reference Figure 6 As shown, the end of the outer rod 22 extending into the interior of the handle 1 is flared. By providing a fitting head at the front end of the handle 1, the outer rod 22 is fitted over the flared structure of the outer rod 22, which is held open within the handle 1 and prevents the outer rod 22 from being pulled out of the handle. In some embodiments, the surface of the outer rod 22 to which it is fitted is provided with raised patterns, effectively securing one end of the outer rod 22 to the front end of the handle 1.
[0039] In some feasible solutions, an end cap 3 is further provided at the end of the handle 1 to ensure the stability and service life of the handle structure.
[0040] In some possible implementations, reference Figure 7-8As shown, the end portion of the second core rod 23 that passes through the interior of the outer rod 22 and extends outward is provided with a wire hook device, specifically, it can be a ring or a hook, and the ring can be an inverted water drop-shaped ring. When using the wire passer of the present application, for example, during knee ligament reconstruction surgery, during posterior cruciate ligament traction and implantation, the core push structure 11 is pushed forward to a certain distance, the wire to be pulled is passed through the wire hook device, i.e., the ring, and the core push structure 11 is released. Under the action of the elastic component 24, the core push structure 11 slides backward as a whole, and the traction wire is fixed to the end portion of the wire passer of the present application through the overall action of the rod body component 2 and the core push structure 11. Then insert the wire guide into the bone tunnel, and after passing through the tunnel, push the core-pushing structure 11 forward. At this time, the traction wire is inside the ring. Driven by the memory metal effect of the ring and the second core rod 23, the traction wire passes through the blind spot of the field of vision and appears in the posterior and superior gap between the condyles of the knee joint. The traction wire is directly sent to the doctor's operating field of vision. The traction wire can be easily clamped under direct vision, and the introduction of the traction wire is convenient and quick.
[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A wire guide, characterized in that: The wire passer comprises a handle (1) and a rod assembly (2), wherein the rod assembly (2) comprises an outer rod (22), a first core rod (21) and a second core rod (23); the outer rod (22) and the first core rod (21) are coaxially connected via an elastic assembly (24); the handle (1) is provided with a core push structure (11), the first core rod (21) is embedded in the core push structure (11), and the outer rod (22) extends outward in a direction away from the handle (1); and the second core rod (23) passes through the interior of the first core rod (21), the elastic assembly (24) and the outer rod (22) and extends outward.
2. A wire feeder according to claim 1, characterized in that: The core pushing structure (11) comprises a pushing block (111) and a sliding block (112) capable of sliding in coordination.
3. A wire feeder according to claim 2, characterized in that: The push block (111) and the sliding block (112) are engaged with each other or connected via screws (113).
4. A wire feeder according to claim 2, characterized in that: The first core rod (21) is embedded in the slider (112).
5. A wire feeder according to claim 2, characterized in that: The slider (112) satisfies at least one of the following characteristics: The slider (112) is provided with a limiting step which is fitted onto the outer wall of the first core rod (21), and the central axis of the limiting step coincides with the central axis of the first core rod (21); One end of the slider (112) is provided with an abutting step that abuts against the end of the first core rod (21).
6. A wire feeder according to claim 5, characterized in that: The first core rod (21) is a variable diameter structure, and the rod diameter of the first core rod (21) sleeved within the limiting step is smaller than the rod diameter of the first core rod (21) sleeved outside the limiting step.
7. The wire feeder according to claim 2, characterized in that: A groove capable of accommodating the elastic component (24) is provided in the slider (112).
8. The wire feeder according to claim 1, characterized in that: The handle (1) is further provided with a slide groove, the slide groove having a slide groove track, and the core pushing structure (11) is arranged in the slide groove and moves along the slide groove track.
9. The wire feeder according to claim 1, characterized in that: One end of the outer rod (22) extending toward the interior of the handle (1) is a trumpet-shaped structure.
10. The wire feeder according to claim 1, characterized in that: The end of the second core rod (23) that passes through the interior of the outer rod (22) and extends outward is provided with a circular ring.