Posterior cruciate ligament positioner

Abstract

The utility model relates to the technical field of medical instruments, in particular to a posterior cruciate ligament positioner which comprises a handle, a positioning sleeve, a positioning rod, a positioning needle and a locking mechanism, the positioning sleeve is connected to the handle, and the positioning needle is installed in the positioning sleeve and used for drilling into a tibia; the positioning rod is connected to the handle in a sliding mode and used for being hooked to the rear side of the tibia. The locking mechanism is arranged on the handle and used for fixing the positioning rod and the handle together. The device has the advantages that the possibility of deviation of the device is reduced, and the operation quality and the operation efficiency are improved.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a posterior cruciate ligament locator. Background Art

[0002] The knee joint is an important joint responsible for supporting the body weight and enabling the lower limbs to flex and extend. It includes the femoral condyle at the distal end of the femur, the tibial plateau at the proximal end of the tibia, and the anterior cruciate ligament and posterior cruciate ligament connecting the femoral condyle and the tibial plateau. The anterior cruciate ligament extends from the back of the femoral condyle to the front of the intercondylar eminence of the tibial plateau to limit the forward displacement of the tibia; the posterior cruciate ligament extends from the front of the femoral condyle to the back of the intercondylar eminence of the tibial plateau to limit the backward displacement of the tibia; the anterior and posterior cruciate ligaments are used to maintain the stability of the knee joint in the anterior and posterior directions.

[0003] Since the knee joint is one of the important weight-bearing joints in the human body, when the human body is walking or exercising vigorously, the knee joint needs to be alternately subjected to the body weight and movement acceleration in a short period of time. If the muscles are not well protected, it is easy to cause cruciate ligament injuries in the knee joint, such as rupture or injury of the posterior cruciate ligament. After the rupture or injury of the posterior cruciate ligament, posterior cruciate ligament reconstruction surgery is often required. During posterior cruciate ligament (PCL) reconstruction surgery, the posterior cruciate ligament locator is a common medical auxiliary tool. Its core function is to help surgeons accurately locate the position of the ligament, maintain the correct tension of the ligament, and navigate the precise placement of the implant.

[0004] The positioners described in the related art usually use locking screws to fix a certain angle by squeezing (squeezing between the positioning rod and the positioning needle in the relative directions). However, this method may easily cause the device to shift, resulting in inaccurate hole positions, which in turn affects the quality and efficiency of the surgery. Utility Model Content

[0005] In order to reduce the possibility of device deviation and improve surgical quality and efficiency, the present application provides a posterior cruciate ligament locator.

[0006] The present application provides a posterior cruciate ligament locator that adopts the following technical solution:

[0007] A posterior cruciate ligament locator comprises a handle, a positioning sleeve, a positioning rod, a positioning needle and a locking mechanism, wherein the positioning sleeve is connected to the handle, the positioning needle is installed in the positioning sleeve and is used to drill into the tibia; the positioning rod is slidably connected to the handle, and the positioning rod is used to hook on the posterior side of the tibia; the locking mechanism is arranged on the handle and is used to fix the positioning rod and the handle together.

[0008] By adopting the above technical solution, when in use, the positioning rod is hooked on the posterior side of the tibia, and the sliding relationship between the positioning rod and the handle is used to adjust the angle. After the angle is adjusted, the positioning rod and the handle are fixed together by the locking mechanism, the positioning needle is drilled into the tibia, and then the drill bit is used to drill along the positioning needle. In this way, the offset of the positioning needle and the positioning rod is avoided by the cooperation of the handle, the positioning rod and the locking mechanism. This structure is simple and effective, can significantly improve the quality of surgery, and reduce the risk of surgical failure caused by instrument problems.

[0009] Optionally, an arc-shaped sliding groove is provided on the handle, the positioning rod is L-shaped as a whole, and the positioning rod, the handle and the positioning sleeve can form a closed ring, the positioning rod includes a sliding part and a hook part, the sliding part and the hook part are integrally formed, and the sliding part can slide in the sliding groove.

[0010] By adopting the above technical solution, the sliding groove and the sliding part are utilized to realize the sliding of the positioning rod, and because the sliding track is an arc, the adjustment range can be expanded.

[0011] Optionally, the sliding portion is provided with a limiting groove, the locking mechanism comprises a second locking knob and a limiting baffle, the limiting baffle is slidably connected in the limiting groove, and the second locking knob is threadedly connected to the limiting baffle.

[0012] By adopting the above technical solution, the positioning rod can be adjusted and fixed by utilizing the cooperation of the handle, the second locking knob, the sliding groove and the limit blocking piece.

[0013] Optionally, a step-shaped structure is processed in the limiting groove, and the bottom of the limiting baffle can fit with the top of the step-shaped structure.

[0014] By adopting the above technical solution, the clamping and fixing is achieved by utilizing the cooperation of the limit blocking piece and the step-shaped structure.

[0015] Optionally, it further includes a first locking knob, which is threadedly connected to the handle, and the positioning sleeve is detachably connected to the handle via the first locking knob.

[0016] By adopting the above technical solution and utilizing the first locking knob, the positioning sleeve can be detachably connected, thereby improving the flexibility of the positioning sleeve during installation and facilitating assembly and disassembly.

[0017] Optionally, the outer circumferential surface of the positioning sleeve is processed with anti-slip grooves, and the first locking knob can abut against the anti-slip grooves.

[0018] By adopting the above technical solution, the connection strength can be improved and the possibility of loosening can be reduced.

[0019] Optionally, a stop block is formed on one end of the positioning sleeve.

[0020] By adopting the above technical solution, the stopper is easy to operate, and the stopper is used to facilitate the separation of the positioning needle and the positioning sleeve.

[0021] Optionally, the hook portion is wavy in shape as a whole, and the hook portion gradually becomes thinner from an end close to the sliding portion to an end away from the sliding portion.

[0022] By adopting the above technical solution, the stability of the overall structure is ensured.

[0023] Optionally, a groove is formed at one end of the hook portion away from the sliding portion, and the groove can be used for the tip of the positioning pin to be inserted.

[0024] By adopting the above technical solution, when no operation is performed, the positioning needle can be inserted into the groove for easy storage.

[0025] Optionally, a weight-reducing hole is provided on the handle.

[0026] By adopting the above technical solution, the weight of the handle, that is, the overall weight, can be reduced.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. This application provides a posterior cruciate ligament locator. When it is used, the locator rod is hooked on the posterior side of the tibia. At this time, the position angle is adjusted by the second locking knob. After the angle is adjusted, the locating needle is drilled into the tibia, and then the drill bit is used to drill along the locating needle to complete the operation. The handle, the slide groove and the limit block are used to prevent the locating needle and the locating rod from deviating. This structure is simple and effective, which can significantly improve the quality of surgery and reduce the risk of surgical failure caused by instrument problems.

[0029] 2. The present application is provided with a positioning sleeve, a positioning rod and a first locking knob. The positioning sleeve is inserted into the handle, the positioning pin is installed inside the positioning sleeve, and the positioning sleeve is fixed by the first locking knob. The positioning sleeve is detachably connected by the first locking knob, which improves the flexibility of the positioning sleeve during installation and facilitates assembly and disassembly;

[0030] 3. In this application, an ergonomic design structure is adopted. This special structural design can provide doctors with a better sense of use and grip, and improve stability during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the posterior cruciate ligament locator in the present application;

[0032] Figure 2is a front view of the posterior cruciate ligament locator in the present application;

[0033] Figure 3 It is a front view of the positioning rod in this application.

[0034] Explanation of the accompanying drawings: 1. Handle; 2. Positioning sleeve; 3. Positioning rod; 31. Sliding part; 32. Hooking part; 4. Positioning needle; 5. Locking mechanism; 51. Limit baffle; 52. Second locking knob; 6. Slide groove; 7. Limit groove; 8. First locking knob; 9. Block; 10. Groove; 11. Weight reduction hole. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-3 This application is described in further detail.

[0036] The present application embodiment discloses a posterior cruciate ligament locator, referring to Figure 1 and Figure 2 The posterior cruciate ligament locator includes a handle 1, a positioning sleeve 2, a positioning rod 3, a positioning needle 4 and a locking mechanism 5. The positioning sleeve 2 is connected to the handle 1, and the positioning needle 4 is installed in the positioning sleeve 2 and is used to drill into the tibia; the positioning rod 3 is slidably connected to the handle 1, and the positioning rod 3 is used to hook on the posterior side of the tibia; the locking mechanism 5 is arranged on the handle 1, and is used to fix the positioning rod 3 and the handle 1 together.

[0037] During surgery, the positioning rod 3 is hooked on the posterior side of the tibia, and the position of the handle 1 is adjusted by using the sliding relationship between the positioning rod 3 and the handle 1, so that the insertion position of the positioning needle 4 is adjusted. After the angle is adjusted, the positioning rod 3 and the handle 1 are fixed together by the locking mechanism 5, and then the positioning needle 4 is drilled into the tibia, and then the drill bit is used to drill along the positioning needle 4. In this way, the cooperation of the handle 1, the positioning rod 3 and the locking mechanism 5 can avoid the deviation of the positioning needle 4 and the positioning rod 3, which can significantly improve the quality of surgery and reduce the risk of surgical failure caused by instrument problems.

[0038] Specifically, refer to Figure 2 and Figure 3 The handle 1 is provided with an arc-shaped slide groove 6, the positioning rod 3 is L-shaped as a whole, and the positioning rod 3, the handle 1 and the positioning sleeve 2 can form a closed ring, the positioning rod 3 includes a sliding portion 31 and a hook portion 32, the sliding portion 31 and the hook portion 32 are integrally formed, and the sliding portion 31 can slide in the slide groove 6. The slide groove 6 and the sliding portion 31 are used to realize the sliding connection of the positioning rod 3, and because the sliding track is an arc, the adjustment range can be expanded while being easy to adjust.

[0039] Of course, the handle 1 adopts an ergonomic design structure. This special structural design can provide doctors with a better sense of use and grip, and improve stability during operation.

[0040] Reference Figure 3 The hook portion 32 is wavy in shape as a whole, and gradually tapers from one end close to the sliding portion 31 to the end away from the sliding portion 31. In this way, the structure is more stable as a whole and can fit the human body structure. At the same time, as the overall structure gradually tapers, it can meet the stress change trend and ensure stability during use.

[0041] Reference Figure 1 and Figure 2 The sliding part 31 is provided with a limiting groove 7, and the locking mechanism 5 includes a second locking knob 52 and a limiting baffle 51. The limiting baffle 51 is slidably connected in the limiting groove 7, and the second locking knob 52 is threadedly connected to the limiting baffle 51. During adjustment, the sliding part 31 slides in the sliding groove 6 to adjust the angle; at the same time, the limiting baffle 51 slides in the limiting groove 7. When the adjustment is completed, the second locking knob 52 is screwed, and the limiting baffle 51 presses the sliding part 31 in the sliding groove 6, thereby fixing it.

[0042] A step-shaped structure is processed in the limiting groove 7, and the bottom of the limiting block 51 can fit with the top of the step-shaped structure. When the second locking knob 52 is turned, the limiting block 51 first presses the step surface, thereby achieving the compression and fixation of the entire sliding part 31. The design of the limiting block 51, the step-shaped structure and the sliding groove 6 is used to achieve the clamping and fixation of the positioning rod 3.

[0043] In order to facilitate assembly and timely replacement of the positioning pin 4, in this embodiment, the positioning sleeve 2 is detachably connected to the handle 1. Specifically, the handle 1 is threaded with a first locking knob 8. When the positioning sleeve 2 is inserted into the handle 1, the first locking knob 8 is screwed, and the first locking knob 8 presses the positioning sleeve 2 to fix the positioning sleeve 2.

[0044] The outer circumferential surface of the positioning sleeve 2 is processed with anti-skid patterns (not shown in the figure), and the first locking knob 8 can abut against the anti-skid patterns. The anti-skid patterns can improve the connection strength and reduce the possibility of loosening. Of course, in order to facilitate the screwing of the first locking knob 8 and the second locking knob 52, anti-skid measures can be taken for the first locking knob 8 and the second locking knob 52.

[0045] Further, refer to Figure 1 and Figure 2 A stopper 9 is formed at one end of the positioning sleeve 2, and the stopper 9 is easy to operate. By using the stopper 9, the positioning needle 4 and the positioning sleeve 2 can be assembled and separated. In addition, a groove 10 is formed at one end of the hook portion 32 away from the sliding portion 31, and the groove 10 can be inserted into the tip of the positioning needle 4. When the operation is not performed, the positioning needle 4 can be inserted into the groove 10, which is convenient for storage and can also improve safety.

[0046] Reference Figure 2 The handle 1 is provided with a weight-reducing hole 11, which can reduce the weight of the handle 1, that is, reduce the overall weight, making it easier to hold and operate. Of course, multiple weight-reducing holes 11 can be provided, as long as the overall strength of the handle 1 is ensured.

[0047] In this embodiment, the materials of each component are not described or limited. According to the actual situation, materials commonly known in the art can be selected.

[0048] The implementation principle of a posterior cruciate ligament locator in an embodiment of the present application is as follows: during assembly, the positioning needle 4 is first installed in the positioning sleeve 2, and then the positioning sleeve 2 is inserted into the handle 1, and the first locking knob 8 is screwed to fix it. During use, the positioning rod 3 is hooked on the posterior side of the tibia, and the sliding relationship between the positioning rod 3 and the handle 1 is used to adjust the angle. After the angle is adjusted, the second locking knob 52 is screwed to fix the positioning rod 3 and the handle 1 together, and the positioning needle 4 is drilled into the tibia, and then a hole is drilled along the positioning needle 4 by a drill bit. In this way, the deviation of the positioning needle 4 and the positioning rod 3 is avoided by the cooperation of the handle 1, the positioning rod 3 and the locking mechanism 5. This structure is simple and effective, can significantly improve the quality of surgery, and reduce the risk of surgical failure caused by instrument problems.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A posterior cruciate ligament locator, characterized in that: The invention comprises a handle (1), a positioning sleeve (2), a positioning rod (3), a positioning needle (4) and a locking mechanism (5); the positioning sleeve (2) is connected to the handle (1); the positioning needle (4) is installed in the positioning sleeve (2) and is used to drill into the tibia; the positioning rod (3) is slidably connected to the handle (1); the positioning rod (3) is used to hook on the rear side of the tibia; the locking mechanism (5) is arranged on the handle (1) and is used to fix the positioning rod (3) and the handle (1) together.

2. The posterior cruciate ligament locator according to claim 1, characterized in that: The handle (1) is provided with an arc-shaped slide groove (6); the positioning rod (3) is L-shaped as a whole, and the positioning rod (3), the handle (1) and the positioning sleeve (2) can form a closed ring; the positioning rod (3) comprises a sliding portion (31) and a hook portion (32); the sliding portion (31) and the hook portion (32) are integrally formed, and the sliding portion (31) can slide in the slide groove (6).

3. The posterior cruciate ligament locator according to claim 2, characterized in that: The sliding portion (31) is provided with a limit groove (7), the locking mechanism (5) comprises a second locking knob (52) and a limit blocking piece (51), the limit blocking piece (51) is slidably connected in the limit groove (7), and the second locking knob (52) is threadedly connected to the limit blocking piece (51).

4. The posterior cruciate ligament locator according to claim 3, characterized in that: A step-shaped structure is processed in the limiting groove (7), and the bottom of the limiting blocking piece (51) can fit with the top of the step-shaped structure.

5. The posterior cruciate ligament locator according to claim 1, characterized in that: It also comprises a first locking knob (8), wherein the first locking knob (8) is threadedly connected to the handle (1), and the positioning sleeve (2) is detachably connected to the handle (1) via the first locking knob (8).

6. The posterior cruciate ligament locator according to claim 5, characterized in that: The outer peripheral surface of the positioning sleeve (2) is processed with anti-slip grooves, and the first locking knob (8) can abut against the anti-slip grooves.

7. The posterior cruciate ligament locator according to claim 1, characterized in that: A stopper (9) is formed on one end of the positioning sleeve (2).

8. The posterior cruciate ligament locator according to claim 2, characterized in that: The hook portion (32) is wavy in shape as a whole, and the hook portion (32) gradually becomes thinner from an end close to the sliding portion (31) to an end away from the sliding portion (31).

9. The posterior cruciate ligament locator according to claim 2, characterized in that: A groove (10) is provided at one end of the hook portion (32) away from the sliding portion (31), and the groove (10) can be used for the tip of the positioning needle (4) to be inserted.

10. The posterior cruciate ligament locator according to claim 1, characterized in that: The handle (1) is provided with a weight-reducing hole (11).

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