Knee joint posterior cruciate ligament reconstruction positioner

Abstract

The utility model relates to the technical field of medical surgical instruments, in particular to a knee joint posterior cruciate ligament reconstruction positioner which comprises a sliding mechanism, the sliding mechanism comprises a sliding rail, a sliding strip, a fixing frame, a rotating block, two protruding blocks, a sliding rod and a fixing assembly, the sliding strip is connected with the sliding rail in a sliding mode and located inside the sliding rail, and the fixing frame is connected with the rotating block. The fixing frame is fixedly connected with the sliding strip, the two protruding blocks are rotatably connected with the fixing frame, the rotating block is fixedly connected with the two protruding blocks, the sliding rod is slidably connected with the rotating block and located in the rotating block, the fixing assembly is arranged at one end of the sliding rail, and the sliding strip slides out of the sliding rail according to needs. By rotating the rotating block, the sliding rod is convenient to fix, and through the arrangement of the structure, the problems that the length of the sharp drill bit can only be adjusted, and the sharp drill bit inclines and is inconvenient to fix along with movement of the upper positioning support and the lower positioning support are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical surgical instruments, in particular to a posterior cruciate ligament reconstruction positioner for the knee joint. Background Art

[0002] In recent years, the diagnosis and treatment of posterior cruciate ligament injuries of the knee have become more and more common. Ligament reconstruction is often required to restore the stability of the knee joint after posterior cruciate ligament injury. The main disadvantage of current instruments is that the positioning is inaccurate when making the tibial bone tunnel. Most posterior cruciate ligament reconstruction tibial guides are point-to-point type, and the tip is too thin. When drilling the Kirschner wire for positioning, it is easy to deviate from the positioning point, or even exceed the field of view under the arthroscope, damaging the posterior blood vessels and nerves.

[0003] In the prior art, the patent (CN202619723U) mentions a posterior cruciate ligament reconstruction positioner for a knee joint, comprising an upper positioning bracket, a lower positioning bracket, a limiting nut, an upper positioning arm, an upper positioning seat, an arc-shaped guide wire groove, an arc-shaped wide blade and a lower positioning seat, wherein the upper positioning bracket and the lower positioning bracket are connected by a slide groove, and the slide groove is provided with a scale line and a limiting nut, the upper end of the upper positioning bracket is connected to the upper positioning seat, and the upper positioning arm is installed on the upper positioning seat, the upper positioning arm is a hollow structure, the positioning end of the upper positioning arm is provided with an arc-shaped guide wire groove, and the end of the arc-shaped guide wire groove is provided with an arc-shaped wide blade, the lower end of the lower positioning bracket is connected to the lower positioning seat, and a pointed drill bit is inserted into the lower positioning seat, and the two side walls of the pointed drill bit are respectively provided with scale lines for measuring the length of the tunnel and scale lines for measuring the actual entry depth of the drill bit, and a depth limiter is provided at the end of the pointed drill bit. This prior art simplifies the operation process of minimally invasive reconstruction of posterior cruciate ligament injury surgery under knee arthroscopy, and reduces the difficulty and risk of surgery.

[0004] However, in the above-mentioned prior art, the pointed drill bit can only be adjusted in length, and as the upper positioning bracket and the lower positioning bracket move, the pointed rotating head will tilt, which is inconvenient to fix. Utility Model Content

[0005] The utility model aims to provide a posterior cruciate ligament reconstruction positioner for the knee joint, which solves the problem in the prior art that the pointed drill bit can only be adjusted in length, and the pointed rotating head will tilt with the movement of the upper positioning bracket and the lower positioning bracket, making it inconvenient to fix.

[0006] To achieve the above-mentioned purpose, the utility model provides a posterior cruciate ligament reconstruction locator of the knee joint, including a sliding mechanism, the sliding mechanism including a sliding rail, a sliding bar, a fixed frame, a rotating block, two protruding blocks, a sliding rod and a fixed assembly, the sliding bar is slidably connected to the sliding rail and is located inside the sliding rail, the fixed frame is fixedly connected to the sliding bar and is located on one side of the sliding bar, the two protruding blocks are rotatably connected to the fixed frame and are located at both ends of the fixed frame, the rotating block is fixedly connected to the two protruding blocks and is located between the two protruding blocks, the sliding rod is slidably connected to the rotating block and is located inside the rotating block, and the fixed assembly is arranged at one end of the sliding rail.

[0007] Wherein, the fixing assembly includes a first threaded rod and a round block, the first threaded rod is threadedly connected to the sliding rail and is located above the sliding bar, and the round block is fixedly connected to the first threaded rod and is located above the first threaded rod.

[0008] Among them, the posterior cruciate ligament reconstruction locator of the knee joint also includes a cutting assembly, which includes a fixed block, a round rod, a connecting block and a cutter. The fixed block is fixedly connected to the sliding rail and is located at one end of the sliding rail. The round rod is slidably connected to the fixed block and is located on one side of the sliding rail. The connecting block is fixedly connected to the round rod and is located on one side of the round rod. The cutter is fixedly connected to the connecting block and is located on one side of the connecting block.

[0009] Among them, the posterior cruciate ligament reconstruction locator of the knee joint also includes a locking assembly, which includes a second threaded rod, an adjustment block and a pressure block, the second threaded rod is threadedly connected to the fixed block and is located on one side of the fixed block, the adjustment block is fixedly connected to the second threaded rod and is located on one side of the fixed block, and the pressure block is fixedly connected to the second threaded rod and is located inside the fixed block.

[0010] Among them, the posterior cruciate ligament reconstruction locator of the knee joint also includes a locking assembly, including four threaded plates, a nut and a rotating cylinder. The rotating cylinder is rotatably connected to the connecting block and is located inside the connecting block. The four threaded plates are fixedly connected to the rotating cylinder and are located on one side of the rotating cylinder. The nut is threadedly connected to the four threaded plates and is sleeved on the outside of the four threaded plates.

[0011] The utility model discloses a posterior cruciate ligament reconstruction positioner for a knee joint, wherein the sliding bar is slidably connected to the sliding rail and is located inside the sliding rail, the fixing frame is fixedly connected to the sliding bar and is located on one side of the sliding bar, the two protruding blocks are rotatably connected to the fixing frame and are located at two ends of the fixing frame, the rotating block is fixedly connected to the two protruding blocks and is located between the two protruding blocks, the sliding rod is slidably connected to the rotating block and is located inside the rotating block, the fixing component is arranged at one end of the sliding rail, the sliding bar is slid out of the sliding rail as needed, the length of the bone tunnel of the patient is measured, and the sliding rod is conveniently fixed by rotating the rotating block, thereby improving the practicality of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0014] Figure 2 It is a side view of the first embodiment of the utility model.

[0015] Figure 3 The utility model Figure 2 AA line section view.

[0016] Figure 4 It is an overall structural diagram of the second embodiment of the utility model.

[0017] 101-sliding rail, 102-sliding bar, 103-fixed frame, 104-rotating block, 105-raised block, 106-sliding rod, 107-first threaded rod, 108-fixed block, 109-round rod, 110-connecting block, 111-cutter, 112-second threaded rod, 113-adjusting block, 114-pressing block, 115-round block, 201-threaded sheet, 202-nut, 203-rotating cylinder. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] First embodiment:

[0020] See also Figures 1 to 3 ,in, Figure 1It is a schematic diagram of the overall structure of the first embodiment of the utility model. Figure 2 is a side view of the first embodiment of the utility model, Figure 3 The utility model Figure 2 AA line section view.

[0021] The utility model provides a posterior cruciate ligament reconstruction positioner for a knee joint, comprising a sliding mechanism, a cutting assembly and a locking assembly, wherein the sliding mechanism comprises a sliding rail 101, a sliding bar 102, a fixing frame 103, a rotating block 104, two protruding blocks 105, a sliding rod 106 and a fixing assembly, the cutting assembly comprises a fixing block 108, a round rod 109, a connecting block 110 and a cutter 111, the locking assembly comprises a second threaded rod 112, an adjusting block 113 and a pressing block 114, and the fixing assembly comprises a first threaded rod 107 and a round block 115. The above-mentioned scheme solves the problem that the pointed drill bit can only be adjusted in length, and the pointed rotating head will tilt with the movement of the upper positioning bracket and the lower positioning bracket, making it inconvenient to fix.

[0022] According to this specific embodiment, the sliding bar 102 is connected to the sliding wheel of the sliding rail 101 and is located inside the sliding rail 101. The fixed frame 103 is fixedly connected to the sliding bar 102 and is located on one side of the sliding bar 102. The two raised blocks 105 are rotatably connected to the fixed frame 103 and are located at both ends of the fixed frame 103. The rotating block 104 is fixedly connected to the two raised blocks 105 and is located between the two raised blocks 105. The sliding rod 106 is slidably connected to the rotating block 104 and is located inside the rotating block 104. The fixing component is arranged at one end of the sliding rail 101. The sliding bar 102 is slid out of the sliding rail 101 as needed to measure the length of the patient's bone tunnel. The sliding rod 106 is conveniently fixed by rotating the rotating block 104.

[0023] Among them, the first threaded rod 107 is threadedly connected to the sliding rail 101 and is located above the sliding bar 102. The round block 115 is fixedly connected to the first threaded rod 107 and is located above the first threaded rod 107. When the round block 115 is rotated, the first threaded rod 107 is pressed above the sliding bar 102, and the sliding bar 102 is fixed inside the sliding rail 101.

[0024] Secondly, the fixed block 108 is fixedly connected to the sliding rail 101 and is located at one end of the sliding rail 101. The round rod 109 is slidably connected to the fixed block 108 and is located on one side of the sliding rail 101. The connecting block 110 is fixedly connected to the round rod 109 and is located on one side of the round rod 109. The cutter 111 is fixedly connected to the connecting block 110 and is located on one side of the connecting block 110. The round rod 109 is slid to adjust the position of the cutter 111. With the cooperation of the round rod 109 and the sliding rail 101, the patient's joint is fixed.

[0025] At the same time, the second threaded rod 112 is threadedly connected to the fixed block 108 and is located on one side of the fixed block 108. The adjusting block 113 is fixedly connected to the second threaded rod 112 and is located on one side of the fixed block 108. The pressing block 114 is fixedly connected to the second threaded rod 112 and is located inside the fixed block 108. When the adjusting block 113 is rotated, the second threaded rod 112 drives the pressing block 114 to fix the round rod 109.

[0026] When using the utility model, the sliding bar 102 is slid out of the sliding rail 101 as needed, the length of the patient's bone tunnel is measured, the round block 115 is rotated, the first threaded rod 107 is pressed on the top of the sliding bar 102, the sliding bar 102 is fixed inside the sliding rail 101, the round rod 109 is slid, the position of the cutter 111 is adjusted, the adjustment block 113 is rotated, the second threaded rod 112 drives the pressing block 114 to fix the round rod 109, and the round rod 109 and the sliding rail 101 cooperate to fix the patient's joint, thereby improving the practicality of the utility model.

[0027] Second embodiment:

[0028] See also Figure 4 , Figure 4 It is an overall structural diagram of the second embodiment of the utility model.

[0029] Based on the first embodiment, the utility model provides a posterior cruciate ligament reconstruction positioner for the knee joint, which also includes a locking assembly, wherein the locking assembly includes four threaded pieces 201, a nut 202 and a rotating cylinder 203. Through the arrangement of the above structure, the problem that the sliding rod 106 is difficult to fix is ​​solved.

[0030] According to this specific embodiment, the rotating cylinder 203 is rotatably connected to the connecting block 110 and is located inside the connecting block 110. The four threaded sheets 201 are fixedly connected to the rotating cylinder 203 and are located on one side of the rotating cylinder 203. The nut 202 is threadably connected to the four threaded sheets 201 and is sleeved on the outside of the four threaded sheets 201. The rotating cylinder 203 is rotated to pass the sliding rod 106 through the four threaded sheets 201. By rotating the nut 202, the four threaded sheets 201 fix the sliding rod 106.

[0031] When using the utility model, the sliding bar 102 is slid out of the sliding rail 101 as needed to measure the length of the patient's bone tunnel, the round block 115 is rotated, the first threaded rod 107 is pressed on the top of the sliding bar 102, and the sliding bar 102 is fixed inside the sliding rail 101, the round rod 109 is slid, the position of the cutter 111 is adjusted, the adjustment block 113 is rotated, the second threaded rod 112 drives the pressing block 114 to fix the round rod 109, and the patient's joint is fixed under the cooperation of the round rod 109 and the sliding rail 101, the rotating cylinder 203 is rotated, the sliding rod 106 is passed through the four threaded sheets 201, and the four threaded sheets 201 fix the sliding rod 106 by rotating the nut 202, thereby improving the stability of the utility model.

[0032] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A posterior cruciate ligament reconstruction positioner for a knee joint, characterized in that: The invention comprises a sliding mechanism, which comprises a sliding rail, a sliding bar, a fixed frame, a rotating block, two protruding blocks, a sliding rod and a fixed component. The sliding bar is slidably connected to the sliding rail and is located inside the sliding rail. The fixed frame is fixedly connected to the sliding bar and is located on one side of the sliding bar. The two protruding blocks are rotatably connected to the fixed frame and are located at two ends of the fixed frame. The rotating block is fixedly connected to the two protruding blocks and is located between the two protruding blocks. The sliding rod is slidably connected to the rotating block and is located inside the rotating block. The fixed component is arranged at one end of the sliding rail.

2. The posterior cruciate ligament reconstruction positioner of the knee joint as claimed in claim 1, characterized in that: The fixing assembly includes a first threaded rod and a round block. The first threaded rod is threadedly connected to the sliding rail and is located above the sliding bar. The round block is fixedly connected to the first threaded rod and is located above the first threaded rod.

3. The posterior cruciate ligament reconstruction positioner of the knee joint as claimed in claim 2, characterized in that: The posterior cruciate ligament reconstruction positioner of the knee joint also includes a cutting assembly, which includes a fixed block, a round rod, a connecting block and a cutter. The fixed block is fixedly connected to the sliding rail and is located at one end of the sliding rail. The round rod is slidably connected to the fixed block and is located on one side of the sliding rail. The connecting block is fixedly connected to the round rod and is located on one side of the round rod. The cutter is fixedly connected to the connecting block and is located on one side of the connecting block.

4. The posterior cruciate ligament reconstruction positioner of the knee joint as claimed in claim 3, characterized in that: The posterior cruciate ligament reconstruction positioner of the knee joint also includes a locking assembly, which includes a second threaded rod, an adjustment block and a pressure block. The second threaded rod is threadedly connected to the fixed block and is located on one side of the fixed block. The adjustment block is fixedly connected to the second threaded rod and is located on one side of the fixed block. The pressure block is fixedly connected to the second threaded rod and is located inside the fixed block.

5. The posterior cruciate ligament reconstruction positioner of the knee joint as claimed in claim 4, characterized in that: The posterior cruciate ligament reconstruction locator of the knee joint also includes a locking assembly, which includes four threaded plates, a nut and a rotating cylinder. The rotating cylinder is rotatably connected to the connecting block and is located inside the connecting block. The four threaded plates are fixedly connected to the rotating cylinder and are located on one side of the rotating cylinder. The nut is threadedly connected to the four threaded plates and is sleeved on the outside of the four threaded plates.

Images