Femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction

Abstract

The utility model discloses a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, which is characterized by comprising a rod body, a positioning head and two spines, the positioning head is fan-shaped, the side wall of the positioning head is provided with two planes and an arc-shaped surface, and the included angle between the two planes is a right angle; the rod body is installed on the positioning head, a notch is formed in the connecting position of one side wall of the rod body and one plane, and the side wall of the rod body and the plane are located on the same straight line. The two spikes are installed at the two ends of the arc-shaped face, and the two spikes extend out of the positioning head. Through the application of the femoral end positioning device, a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is provided, the completeness of a femoral tunnel can be ensured, and the problem that the bone tunnel is anterior can be avoided.

Description

Technical Field

[0001] The utility model relates to the relevant technical fields such as medical instruments, and in particular to a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction. Background Art

[0002] Most of the positioning devices currently used for ligament reconstruction are point-to-point structures. The distance between the positioning point and the posterior edge and the lower edge of the medial wall of the lateral femoral condyle mainly depends on the experience of the surgeon. The lens of the arthroscopy is a 30° or 70° bevel. It is easy to have large errors when using the bevel lens to determine the distance. When the distance is too far from the edge of the cartilage, the graft may be too short, and when the distance is too close, it will cause damage to the edge of the expanded bone tunnel. In actual use, it is easy to have problems such as inaccurate positioning, bone damage from the back to the bottom, loss of integrity of the femoral tunnel, and then loosening and failure of the graft. To avoid these problems, it is necessary to make the center point have an appropriate length from the back to the bottom of the arc-shaped cartilage edge of the femoral condyle. Utility Model Content

[0003] In view of this, in order to solve the above problems, the purpose of the utility model is to provide a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, which includes:

[0004] Rod body, positioning head, two spikes;

[0005] The positioning head is fan-shaped, and the side wall of the positioning head has two planes and an arc-shaped surface, and the angle between the two planes is a right angle;

[0006] The rod body is installed on the positioning head, a notch is provided at the connection between one side wall of the rod body and one of the planes, and one side wall of the rod body and one of the planes are located on the same straight line;

[0007] The two spikes are installed at two ends of the arc surface, and the two spikes extend out of the positioning head.

[0008] In the above-mentioned femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, the rod body is rectangular.

[0009] In the above-mentioned femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, the connection between the rod body and the positioning head facing away from the notch is arranged in an arc shape.

[0010] The above-mentioned femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, wherein the diameter of the positioning head is 12 mm.

[0011] In the above-mentioned femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, the notch is arranged in a semicircular shape.

[0012] The above-mentioned femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, wherein the diameter of the notch is 2 mm.

[0013] Compared with the prior art, the above technical solution has the following positive effects:

[0014] Through the application of the utility model, a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is provided. When the device is used, the patient flexes the knee 90 degrees, and then the head of the fan-shaped positioning head is inserted into the joint cavity and closely attached to the inner wall bone surface of the lateral femoral condyle, so that the arc surface of the fan-shaped positioning head is flush with the rear cartilage edge, and the two ends of the arc surface point to the rear and the bottom of the lateral femoral condyle respectively, and the sliding is restricted by the spikes. Then, a sharp cone or a Kirschner wire is used to drill a hole into the femoral condyle through the notch at the root of the fan-shaped positioning head to complete the center positioning of the femoral end stop of the anterior cruciate ligament. Finally, a bone tunnel of suitable diameter is expanded from this center point to accommodate the graft. The device can ensure the integrity of the femoral tunnel and avoid the problem of the bone tunnel being biased forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a stereoscopic diagram of a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction.

[0016] Figure 2 The utility model is a top view of a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction.

[0017] 1. Rod body; 2. Positioning head; 3. Flat surface; 4. Curved surface; 5. Notch; 6. Spike. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations, but they are not intended to limit the present invention.

[0019] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0020] like Figure 1 to Figure 2As shown, a preferred embodiment of a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is shown, which includes: a rod body 1, a positioning head 2, and two spikes 6.

[0021] The positioning head 2 is fan-shaped, and the side wall of the positioning head 2 has two planes 3 and an arc-shaped surface 4, and the angle between the two planes 3 is a right angle; the rod body 1 is installed on the positioning head 2, and a notch 5 is provided at the connection between one side wall of the rod body 1 and a plane 3, and one side wall of the rod body 1 and a plane 3 are located on the same straight line; two spikes 6 are installed at both ends of the arc-shaped surface 4, and the two spikes 6 extend out of the positioning head 2.

[0022] In actual use, the rod body 1 and the positioning head 2 are both made of metal material, so that the rod body 1 and the positioning head 2 have good corrosion resistance. The positioning head 2 is connected to the rod body 1, and the radius of the fan-shaped positioning head 2 is 6mm. A notch 5 with a radius of 1mm is set at the connection between the fan-shaped positioning head 2 and the rod body 1. During the operation, the bone surface of the anterior cruciate ligament attachment area of ​​the inner wall of the femoral lateral condyle is first cleaned, and the device is extended into the joint cavity through the soft tissue channel. When the patient flexes his knee 90°, the head of the fan-shaped positioning head 2 is close to the inner wall bone surface of the lateral femoral condyle, so that the arc surface 4 of the fan-shaped positioning head 2 is flush with the rear cartilage edge, and the two ends of the arc surface 4 point to the rear and the bottom of the lateral femoral condyle respectively, and the sliding is limited by the spike 6. Then, a Kirschner wire is used to drill a hole into the femoral condyle through the notch 5 at the root of the fan-shaped positioning head 2 to complete the center positioning of the femoral end stop of the anterior cruciate ligament.

[0023] The utility model also has the following implementation methods based on the above:

[0024] Furthermore, a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is provided, wherein the rod body 1 is rectangular.

[0025] Further, a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is provided, wherein the connection between the rod body 1 and the positioning head 2 facing away from the notch 5 is arranged in an arc shape. Specifically, the arc-shaped connection end makes the device not affect the patient when in use.

[0026] Furthermore, a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is provided, wherein the diameter of the positioning head 2 is 12 mm.

[0027] Furthermore, a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is provided, wherein the notch 5 is arranged in a semicircular shape.

[0028] Furthermore, a femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction is provided, wherein the diameter of the notch 5 is 2 mm.

[0029] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction, characterized in that: include: Rod body, positioning head, two spikes; The positioning head is fan-shaped, and the side wall of the positioning head has two planes and an arc-shaped surface, and the angle between the two planes is a right angle; The rod body is installed on the positioning head, a notch is provided at the connection between one side wall of the rod body and one of the planes, and one side wall of the rod body and one of the planes are located on the same straight line; The two spikes are installed at two ends of the arc surface, and the two spikes extend out of the positioning head.

2. A femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction according to claim 1, characterized in that: The rod body is rectangular.

3. A femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction according to claim 1, characterized in that: The connection between the rod body and the positioning head facing away from the notch is arranged in an arc shape.

4. A femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction according to claim 1, characterized in that: The diameter of the positioning head is 12 mm.

5. The femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction according to claim 1, characterized in that: The notch is arranged in a semicircular shape.

6. A femoral end positioning surgical instrument for assisting anterior cruciate ligament reconstruction according to claim 5, characterized in that: The diameter of the notch is 2 mm.

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