Posterior cruciate ligament traction ejector

Abstract

The utility model relates to the technical field of ligament repair, in particular to a posterior cruciate ligament traction ejector. The tool comprises a grab handle and a back shore part. The grab handle is in arc transition connection with the back shore part; the front end of the back shore part is an inverted trapezoidal groove, and each edge in the groove is provided with an arc chamfer; and the lengths of the two outer side surfaces of the non-curved surface of the inverted trapezoidal groove from the top end to the joint are gradually reduced until the two outer side surfaces are matched with the size of the grab handle. The inverted trapezoidal groove is formed, so that the anterior cruciate ligament can be stably propped against the interior of the inverted trapezoidal groove and cannot slide, and a good protection effect is achieved; an operator can open the anterior cruciate ligament by a proper distance with small force, enough operation space is provided for posterior cruciate ligament repair operation, operation is simpler, common doctors can grasp the anterior cruciate ligament repair operation after slightly practicing, and the anterior cruciate ligament repair device has high popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of ligament repair, in particular to a posterior cruciate ligament traction and displacement device. Background Art

[0002] In our knee joint, there are two main ligaments that cross each other, called the anterior cruciate ligament and the posterior cruciate ligament. They connect the femur and tibia at both ends of the joint like two ropes, and play a role in stabilizing the knee joint. The anterior cruciate ligament starts from the medial side of the lateral femoral condyle and ends between the tibia intercondylar ridges. Its function is to limit excessive anterior displacement of the tibia, hyperextension of the knee joint, and lateral movement of the tibia when the knee is extended. The posterior cruciate ligament starts from the lateral side of the medial femoral condyle and ends at the posterior edge of the tibia intercondylar ridge. Its function is to limit posterior displacement of the tibia, hyperextension, rotation of the knee joint, and lateral movement of the tibia when the knee is extended.

[0003] At present, when performing posterior cruciate ligament repair surgery, since the gap between the anterior and posterior cruciate ligaments is very small, it is easy to touch the anterior cruciate ligament during the operation, affecting the repair effect. Therefore, it is often necessary to use auxiliary support devices to push the anterior cruciate ligament open for a distance to ensure that the posterior cruciate ligament has sufficient surgical space. In the prior art, there is no auxiliary support device specifically used for posterior cruciate ligament repair surgery, and a plate-like device is usually used instead. However, since the ligament and the plate-like device are easy to slide, they cannot be fixed if the supporting force is too small; if too much force is used, it may cause ligament rupture. Therefore, the operation is difficult and requires a doctor with rich experience to complete the operation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a posterior cruciate ligament traction and pushing device to solve the technical problem that the anterior cruciate ligament is not easy to stretch during the original posterior cruciate ligament repair surgery.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a posterior cruciate ligament traction and pusher, comprising a handle and a support part; the handle and the support part are connected by an arc transition; the front end of the support part is an inverted trapezoidal groove, and each edge in the groove is provided with an arc chamfer; the length dimension of the two outer side surfaces of the non-curved surface of the inverted trapezoidal groove from the top to the connection point changes from large to small until it matches the size of the handle.

[0006] Furthermore, the angle between the top and bottom of the inverted trapezoidal groove is 130°, the outer length dimension of the opening of the inverted trapezoidal groove is 12 mm, the width dimension is 5 mm, and the thickness dimension is 2 mm; the inner width dimension of the bottom of the inverted trapezoidal groove is 8 mm.

[0007] Furthermore, a 30° chamfer is provided on the bottom end surface of the inverted trapezoidal groove facing the inner curved angle of the handle and the top support portion.

[0008] Furthermore, the angle between the handle and the top support portion is 30°, and the length of the top support portion is 20 mm.

[0009] Furthermore, the handle is a gradually changing cylindrical structure, and the diameter from the front end of the handle to the top support portion changes from large to small.

[0010] Furthermore, the handle and the top support portion are an integrally formed structure.

[0011] Compared with the existing technology, the beneficial effects of the utility model are:

[0012] 1. By providing a support with an inverted trapezoidal groove, during the operation, the anterior cruciate ligament can be stably abutted in the inverted trapezoidal groove without sliding, which has a good protective effect; in addition, the operator can open the anterior cruciate ligament to an appropriate distance with less force, providing sufficient surgical space for the posterior cruciate ligament repair operation, and the operation is simpler. Ordinary doctors can master it with a little practice, which has a high promotion value;

[0013] 2. The angle between the top and bottom of the inverted trapezoidal groove and the size of the opening are set so that the volume of the top support part is appropriate, which is convenient for doctors to observe and operate, and can more stably limit the anterior cruciate ligament in the inverted trapezoidal groove without causing damage to it;

[0014] 3. The handle has a gradient cylindrical structure, which has a better hand feel, is not easy to slip out of the hand, and can improve surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure in another direction.

[0017] Description of labels:

[0018] 1. Handle; 2. Top support; 21. Inverted trapezoidal groove; 22. Chamfer. DETAILED DESCRIPTION

[0019] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0020] Please refer to Figure 1-Figure 2 As shown, the technical solution adopted by the utility model is: a posterior cruciate ligament traction and pusher, comprising a handle 1 and a support portion 2; the handle 1 and the support portion 2 are connected by an arc transition; the front end of the support portion 2 is an inverted trapezoidal groove 21, and each edge in the groove is provided with an arc chamfer; the length dimension of the two outer side surfaces of the non-curved surface of the inverted trapezoidal groove 21 from the top to the connection point changes from large to small until it matches the size of the handle 1.

[0021] From the above description, it can be seen that since the front end of the supporting part 2 is an inverted trapezoidal groove 21, during the process of supporting the anterior cruciate ligament, the anterior cruciate ligament can be against the bottom surface of the groove. At the same time, the two side ends of the inverted trapezoidal groove 21 can limit the left and right deviation of the anterior cruciate ligament, and it will not slide out of the inverted trapezoidal groove 21, thereby avoiding collision with the anterior cruciate ligament during surgery, thereby achieving the effect of protecting the ligament; the arc chamfers set on each edge in the groove can effectively avoid possible damage to the ligament caused by the edge itself; since the inverted trapezoidal groove 21 has a limiting function, it does not require much force to support the anterior cruciate ligament to an appropriate distance, and the operation requirements are lower, which is suitable for ordinary doctors to perform surgical repairs.

[0022] More preferably, the angle between the top and bottom of the inverted trapezoidal groove 21 is 130°, the outer length dimension of the opening of the inverted trapezoidal groove 21 is 12 mm, the width dimension is 5 mm, and the thickness dimension is 2 mm; the inner width dimension of the bottom of the inverted trapezoidal groove 21 is 8 mm.

[0023] It can be seen from the above description that, through the above arrangement, the volume of the inverted trapezoidal groove 21 is appropriate and suitable for the bone gap between the tibia and the femur; at the same time, the anterior cruciate ligament can fit more closely with the inverted trapezoidal groove 21.

[0024] More preferably, a 30° chamfer is provided on the bottom end surface of the inverted trapezoidal groove 21 facing the inner curved angle between the handle 1 and the top support portion 2 .

[0025] From the above description, it can be seen that by setting the 30° chamfer 22, the doctor can see the positional relationship between the inverted trapezoidal groove 21 and the anterior cruciate ligament more clearly, which is convenient for making corresponding actions.

[0026] More preferably, the angle between the handle 1 and the top support portion 2 is 30°, and the length of the top support portion 2 is 20 mm.

[0027] From the above description, it can be seen that through the above settings, the spreader is more in line with the angle formed between the tibia and the femur, and is convenient for extending from the back of the tibia to the front end until the anterior cruciate ligament is spread a certain distance.

[0028] More preferably, the handle 1 is a gradually changing cylindrical structure, and the diameter from the front end of the handle 1 to the top support portion 2 changes from large to small.

[0029] It can be seen from the above description that, through the above arrangement, the handle 1 is easier to be gripped by hand, and the weight of the handle 1 can also be reduced, thereby achieving the effect of making the spreader as a whole light and easy to operate.

[0030] More preferably, the handle 1 and the top support portion 2 are an integrally formed structure.

[0031] From the above description, it can be seen that the use of an integrated molding structure can simplify the processing technology of the expander, while improving the strength and extending the service life.

[0032] The working principle of the utility model is as follows: when in use, hold the handle 1 of the spreader tightly with your hand, extend the top support part 2 into the bone gap along the front end of the femur, and tilt the front end of the top support part 2 upward at a small angle, so that the position of the anterior cruciate ligament can be observed more clearly; as the top support part 2 is extended, the two side surfaces of the opening of the inverted trapezoidal groove 21 contact the anterior cruciate ligament until the bottom surface of the inverted trapezoidal groove 21 fits with the anterior cruciate ligament; at this time, the anterior cruciate ligament is located inside the inverted trapezoidal groove 21; continue to move a distance toward the rear end of the femur, so that the anterior cruciate ligament is pushed away from the original position, thereby providing sufficient surgical space for the posterior cruciate ligament repair operation.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A posterior cruciate ligament traction and pushing device, comprising a handle and a supporting part; characterized in that: The handle and the top support part are connected by an arc transition; the front end of the top support part is an inverted trapezoidal groove, and each edge in the groove is provided with an arc chamfer; the length dimensions of the two outer side surfaces of the non-curved surface of the inverted trapezoidal groove from the top to the connection point change from large to small until they match the size of the handle.

2. The posterior cruciate ligament traction and displacement device according to claim 1, characterized in that: The angle between the top and bottom of the inverted trapezoidal groove is 130°, the outer length dimension of the opening of the inverted trapezoidal groove is 12 mm, the width dimension is 5 mm, and the thickness dimension is 2 mm; the inner width dimension of the bottom of the inverted trapezoidal groove is 8 mm.

3. The posterior cruciate ligament traction and displacement device according to claim 1, characterized in that: A 30° chamfer is arranged on the bottom end surface of the inverted trapezoidal groove facing the inner curved angle of the handle and the top support portion.

4. The posterior cruciate ligament traction and displacement device according to claim 1, characterized in that: The angle between the handle and the top support portion is 30°, and the length of the top support portion is 20 mm.

5. The posterior cruciate ligament traction and displacement device according to claim 1, characterized in that: The handle is a gradually changing cylindrical structure, and the diameter from the front end of the handle to the top support portion changes from large to small.

6. The posterior cruciate ligament traction and displacement device according to claim 1, characterized in that: The handle and the top support part are an integrally formed structure.

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