Meniscus retractor for knee arthroscopic surgery

Abstract

The invention aims to provide a meniscus retractor for knee arthroscopic surgery, and relates to the technical field of medical instruments, the meniscus retractor comprises a clamping assembly and a retraction rod, an L-shaped support is slidably arranged on the clamping assembly, a ball head structure is arranged on the support, and the retraction rod is movably connected with the support through the ball head structure; the height of the traction rod can be adjusted through stretching of the telescopic vertical rod of the support, the distance between the traction rod and the knee joint can be adjusted through stretching of the telescopic transverse rod, and the angle of the traction rod can be flexibly adjusted through the ball head structure. A side rod is rotatably mounted at one end of the retraction rod, a sliding handle is slidably arranged on the retraction rod, after the retraction rod slides into the body through a guide cylinder, a pull wire is pulled by sliding the sliding handle to pull the side rod to rotate and open, a meniscus can be hooked through the side rod, and a lead screw of the guide cylinder is rotated to drive the retraction rod to slide to pull the meniscus and keep the meniscus. And the punching operation of the femur or the tibia is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a meniscus retractor used in knee arthroscopy surgery. Background Art

[0002] On the tibial articular surface, there are inner and outer half-moon-shaped bones, called menisci. The edges are thicker and closely connected to the joint capsule, while the center is thinner and free. Except for the edge part that can repair itself after damage, the meniscus cannot repair itself after rupture. After the meniscus is removed, a thin and narrow fibrocartilaginous meniscus can be regenerated from the synovium. The normal meniscus has the function of increasing the concavity of the tibial condyle and lining the inner and outer condyles of the femur to increase the stability of the joint and buffer shock.

[0003] In arthroscopic surgery, when drilling holes such as femoral tunnels or tibial tunnels, if the position of the meniscus intersects or is too close to the drilling path, it may interfere with the accuracy of drilling positioning. In this case, in order to avoid damaging the meniscus and ensure the accuracy of the drilling, the doctor may choose to retract the meniscus appropriately. Therefore, in order to facilitate the retraction of the meniscus and not damage the meniscus, a meniscus retractor is needed. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides the following technical solutions:

[0005] A meniscus retractor for knee arthroscopy surgery comprises a clamping assembly and a retractor rod, wherein an L-shaped bracket is slidably arranged on the clamping assembly, a ball head structure is arranged on the bracket, and the retractor is movably connected to the bracket via the ball head structure; a side rod is rotatably mounted on one end of the retractor rod, and a sliding handle is slidably arranged on the retractor rod, a pull wire is arranged inside the retractor rod, one end of the pull wire is wound around the rotating shaft of the side rod, and the other end is fixedly connected to the sliding handle, and the pull wire is pulled by sliding the sliding handle to rotate the side rod.

[0006] Furthermore, there are two sliding handles, and two side grooves are symmetrically opened on the pulling rod. The two sliding handles are slidably installed in the side grooves. The pull wire passes through the side grooves and is fixedly connected to the sliding handles. The two pull wires connecting the two sliding handles are wound around the side rod rotating shaft in opposite directions.

[0007] Furthermore, the ball head structure includes an outer shell, a ball core, and a guide tube. The outer shell is fixedly connected to the bracket, the ball core is movably installed in the outer shell, and the guide tube passes through the ball core and is fixedly connected to the ball core.

[0008] Furthermore, a screw rod is rotatably mounted on the guide cylinder, and a fixing assembly is threadedly sleeved on the screw rod. The pull-out rod is movably inserted into the guide cylinder, clamped and fixed by the fixing assembly, and the fixing assembly and the pull-out rod are driven to move along the guide cylinder by rotating the screw rod.

[0009] Furthermore, the fixing assembly includes a fixing seat, a fixing screw and a clamping plate. The fixing seat is threadedly sleeved on the screw. The fixing screw is a bidirectional screw and is rotatably installed in the fixing seat. There are two clamping plates, which are respectively threadedly sleeved on the two ends of the fixing screw. The fixing screw is rotated to drive the two clamping plates to slide toward or away from each other on the fixing seat.

[0010] Furthermore, the clamping assembly includes a U-shaped seat, a clamping plate, and a clamping bolt. A sliding groove is opened on one side of the U-shaped seat, the bracket slides along the sliding groove, the clamping bolt thread passes through the other side of the U-shaped seat, and the clamping plate is rotatably mounted on the clamping bolt.

[0011] Furthermore, the bracket includes a telescopic vertical rod and a telescopic cross rod, the lower end of the telescopic vertical rod is slidably connected to the clamping assembly, the upper end is rotationally connected to the tail end of the telescopic cross rod, and the front end of the telescopic cross rod is connected to the ball head structure.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] The invention comprises a clamping assembly and a distraction rod. An L-shaped bracket is slidably arranged on the clamping assembly, a ball head structure is arranged on the bracket, and the distraction rod is movably connected to the bracket through the ball head structure. The height of the distraction rod can be adjusted by telescoping a telescopic vertical rod of the bracket, the distance between the distraction rod and the knee joint can be adjusted by telescoping a telescopic horizontal rod, and the angle of the distraction rod can be flexibly adjusted by the ball head structure. A side rod is rotatably installed at one end of the distraction rod, and a sliding handle is slidably arranged on the distraction rod. After the distraction rod slides into the body through a guide cylinder, the side rod is rotated and opened by pulling a pull line through the sliding handle, and the meniscus can be hooked by the side rod. The distraction rod is driven to slide and pull the meniscus by rotating the screw rod of the guide cylinder, and the meniscus is held, so as to facilitate the punching operation of the femur or tibia. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the installation structure of the retraction rod of the present invention;

[0016] Figure 3 It is an enlarged schematic diagram of the installation structure A of the retraction rod of the present invention;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the retractor rod of the present invention.

[0018] In the figure, U-shaped seat 1, splint 2, clamping bolt 3, telescopic vertical rod 4, telescopic horizontal rod 5, ball head structure 6, outer shell 61, ball core 62, guide cylinder 63, retraction rod 7, side rod 71, sliding handle 72, pull wire 73, screw rod 8, fixing assembly 9, fixing seat 91, fixing screw rod 92, splint 93. DETAILED DESCRIPTION

[0019] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0020] Embodiment 1:

[0021] refer to Figure 1-4 , a meniscus retractor for knee arthroscopy surgery, comprising a clamping assembly and a retractor rod 7, wherein an L-shaped bracket is slidably provided on the clamping assembly, a ball head structure 6 is provided on the bracket, and the retractor is movably connected to the bracket through the ball head structure 6;

[0022] In this embodiment, the clamping assembly includes a U-shaped seat 1, a clamping plate 932, and a clamping bolt 3. A sliding groove is provided on one side of the U-shaped seat 1, and the bracket slides along the sliding groove. The clamping bolt 3 is threaded through the other side of the U-shaped seat 1. The clamping plate 932 is rotatably mounted on the clamping bolt 3. By tightening the clamping bolt 3, the clamping plate 932 is clamped and fixed on the operating table.

[0023] In this embodiment, the bracket includes a telescopic vertical rod 4 and a telescopic cross rod 5. The lower end of the telescopic vertical rod 4 is slidably connected to the clamping assembly, and the upper end is rotatably connected to the tail end of the telescopic cross rod 5. The front end of the telescopic cross rod 5 is connected to the ball head structure 6; the ball head structure 6 includes a shell 61, a ball core 62, and a guide cylinder 63. The shell 61 is fixedly connected to the bracket, the ball core 62 is movably installed in the shell 61, and the guide cylinder 63 passes through the ball core 62 and is fixedly connected to the ball core 62;

[0024] In this embodiment, the height of the distraction rod 7 can be adjusted by extending and retracting the telescopic vertical rod 4 of the bracket, the distance between the distraction rod 7 and the knee joint can be adjusted by extending and retracting the telescopic horizontal rod 5, and the angle of the distraction rod 7 can be flexibly adjusted by the ball head structure 6.

[0025] Embodiment 2:

[0026] refer to Figure 1-4According to Embodiment 1, a side rod 71 is rotatably mounted on one end of the retracting rod 7, and a sliding handle 72 is slidably arranged on the retracting rod 7. A pull wire 73 is arranged inside the retracting rod 7, one end of the pull wire 73 is wound around the rotating shaft of the side rod 71, and one end is fixedly connected to the sliding handle 72. The pull wire 73 is pulled by sliding the sliding handle 72 to pull the side rod 71 to rotate;

[0027] In this embodiment, there are two sliding handles 72, and two side grooves are symmetrically provided on the pulling rod 7. The two sliding handles 72 are slidably installed in the side grooves. The pull wires 73 are inserted into the side grooves and fixedly connected to the sliding handles 72. The two pull wires 73 connecting the two sliding handles 72 are wound around the rotating shaft of the side rod 71 in opposite directions. A screw rod 8 is rotatably installed on the guide cylinder 63, and a fixing component 9 is threadedly sleeved on the screw rod 8. The pulling rod 7 is movably inserted into the guide cylinder 63, and is clamped and fixed by the fixing component 9, and is fixed by the fixing component 9. The fixing assembly 9 and the pulling rod 7 are driven to move along the guide cylinder 63 by rotating the screw rod 8; the fixing assembly 9 includes a fixing seat 91, a fixing screw rod 928, and a clamping plate 932. The fixing seat 91 is threadedly sleeved on the screw rod 8. The fixing screw rod 928 is a bidirectional screw rod 8, which is rotatably installed in the fixing seat 91. There are two clamping plates 932, which are respectively threadedly sleeved on the two ends of the fixing screw rod 928. The fixing screw rod 928 is rotated to drive the two clamping plates 932 to slide toward or away from each other on the fixing seat 91.

[0028] In this embodiment, a side rod 71 is rotatably installed at one end of the retractor rod 7, and a sliding handle 72 is slidably set on the retractor rod 7. After the retractor rod 7 slides into the body through the guide cylinder 63, the pull wire 73 is pulled by sliding the sliding handle 72 to pull the side rod 71 to rotate and open. The meniscus can be hooked by the side rod 71, and the retractor rod 7 is driven to slide and pull the meniscus by rotating the screw rod 8 of the guide cylinder 63, and the meniscus is held, which is convenient for the femur or tibia drilling operation.

[0029] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A meniscus retractor for knee arthroscopy, comprising a clamping assembly and a retractor rod, characterized in that: An L-shaped bracket is slidably provided on the clamping assembly, and a ball head structure is provided on the bracket, and the retraction is movably connected to the bracket through the ball head structure; a side rod is rotatably installed on one end of the retraction rod, and a sliding handle is slidably provided on the retraction rod, a pull wire is provided in the retraction rod, one end of the pull wire is wound around the rotating shaft of the side rod, and the other end is fixedly connected to the sliding handle, and the pull wire is pulled by sliding the sliding handle to rotate the side rod.

2. A meniscus retractor for knee arthroscopy according to claim 1, characterized in that: There are two sliding handles, and two side grooves are symmetrically opened on the pulling rod. The two sliding handles are slidably installed in the side grooves. The pulling wires are inserted into the side grooves and fixedly connected to the sliding handles. The two pulling wires connecting the two sliding handles are wound around the side rod rotating shaft in opposite directions.

3. A meniscus retractor for knee arthroscopy according to claim 1, characterized in that: The ball head structure comprises an outer shell, a ball core and a guide tube. The outer shell is fixedly connected to the bracket, the ball core is movably installed in the outer shell, and the guide tube passes through the ball core and is fixedly connected to the ball core.

4. A meniscus retractor for knee arthroscopy according to claim 3, characterized in that: A screw rod is rotatably mounted on the guide cylinder, and a fixing assembly is threadedly sleeved on the screw rod. The pull-off rod is movably inserted into the guide cylinder and is clamped and fixed by the fixing assembly. The fixing assembly and the pull-off rod are driven to move along the guide cylinder by rotating the screw rod.

5. A meniscus retractor for knee arthroscopy according to claim 4, characterized in that: The fixing assembly includes a fixing seat, a fixing screw and a clamping plate. The fixing seat is threadedly sleeved on the screw. The fixing screw is a bidirectional screw and is rotatably installed in the fixing seat. There are two clamping plates, which are respectively threadedly sleeved on the two ends of the fixing screw. The fixing screw is rotated to drive the two clamping plates to slide toward or away from each other on the fixing seat.

6. A meniscus retractor for knee arthroscopy according to claim 1, characterized in that: The clamping assembly includes a U-shaped seat, a clamping plate, and a clamping bolt. A sliding groove is provided on one side of the U-shaped seat, and the bracket slides along the sliding groove. The clamping bolt thread passes through the other side of the U-shaped seat, and the clamping plate is rotatably mounted on the clamping bolt.

7. A meniscus retractor for knee arthroscopy according to claim 1, characterized in that: The bracket comprises a telescopic vertical rod and a telescopic cross rod. The lower end of the telescopic vertical rod is slidably connected to the clamping assembly, and the upper end is rotatably connected to the tail end of the telescopic cross rod. The front end of the telescopic cross rod is connected to the ball head structure.

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