Cutter for incision of quadriceps tendon in partial layer

Abstract

To provide a cutter for incision of quadriceps tendon horizontally by a certain thickness.SOLUTION: Provided is a cutter having a U-shape, having an outside dimension with a constant width, having an inside dimension of a thickness of a quadriceps tendon to be subjected to incision, having one end being a sharp blade for incision, having another end being a thick surface, and having a center portion to be gripped with an existing handle.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a cutter for making a constant thickness horizontal incision in the quadriceps tendon. [Background technology]

[0002] Anterior cruciate ligament rupture is a common injury in athletes. Treatment of this injury requires surgery. The surgical method involves harvesting another muscle tendon and using that muscle tendon as a graft. In recent years, the quadriceps tendon has been attracting attention as a graft tendon. When harvesting the tendon, a U-shaped cutter can be used to cut the quadriceps tendon (1) vertically and on both sides with a fixed width (Figure 1). However, because the quadriceps tendon is thick, the quadriceps tendon is harvested in its entirety, and after harvesting, it needs to be thinned. In other words, a quadriceps tendon thicker than necessary is harvested. As a result, complications include pain at the harvest site and muscle weakness. In order to harvest the quadriceps tendon in a thin, partial layer rather than in its entirety, a cutter that makes a horizontal incision has already been developed. Summary of the Invention [Problem to be solved by the invention]

[0003] The conventional techniques have the following drawbacks: Conventional cutters are U-shaped, with a sharp blade (4) at one end for horizontally incising the quadriceps tendon and a handle (5) at the other end (Figure 2). When horizontally incising the quadriceps tendon, the handle (5) comes into contact with the surface of the quadriceps tendon, and the sharp blade (4) is inside the quadriceps tendon, parallel to the handle and at a distance, so that even if the handle is pressed, it is difficult to transmit force to the blade (Figure 3). As a result, the handle becomes distorted, the incised surface becomes irregular and thin, and the quadriceps tendon is sometimes cut. The present invention is intended to solve the above problems. [Means for solving the problem]

[0004] It is U-shaped, with a constant outer width and an inner width that is the thickness of the quadriceps tendon to be incised. One end is a sharp blade for incision, while the other end is a thick surface. The cutter is held in the center by an existing handle. Effect of the Invention

[0007] Since the present invention is configured as described above, it has the following advantages. (a) It is U-shaped, with a constant outer dimension (6) and a constant inner dimension (7) that is the thickness of the quadriceps tendon to be incised. One end is inserted into the quadriceps tendon with a sharp blade (9), and the thick surface (10) at the other end is in contact with the surface of the quadriceps tendon. The handle (11) is in contact with the cross section of a constant width cut perpendicularly to the quadriceps tendon (1) on both sides. When the handle is advanced, force is applied directly to the sharp blade (9) (Figure 6). (b) Because the surface is in contact with a thick surface (10), by pressing down on the handle while moving it, the quadriceps tendon can be incised at a constant thickness (Figure 7). Because the surface is flat, it glides over the surface of the quadriceps tendon without cutting it. (c) By varying the thickness of the thick surface (8), the thickness of the quadriceps tendon can be determined. BEST MODE FOR CARRYING OUT THEINVENTION

[0008] It is U-shaped, with the outer dimension (6) being constant in width, but the inner dimension (7) being the thickness of the quadriceps tendon to be incised (Figure 4). One end is a sharp blade (9) for incising, while the other end is a thick surface (10) for determining the thickness of the quadriceps tendon. The center is held by an existing handle. The present invention is configured as described above.

[0009] The present invention has the above-mentioned configuration, and is used as follows. When using the present invention, first, an existing U-shaped cutter is used to vertically incise the surface of the quadriceps tendon at a certain width (Figure 1), and then the present invention is attached to the handle (11) of the existing cutter (Figure 5). The thick surface (10) of the present invention is brought into close contact with the surface of the incised quadriceps tendon, and the sharp blade (9) at one end is inserted into the cut surface. The handle is advanced so that the thick surface of the present invention is brought into close contact with the quadriceps tendon (Fig. 6). Since the sharp blade applies force directly from the handle, the quadriceps tendon can be incised in partial thickness with the inner thickness of the present invention (Fig. 7). [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 shows a diagram of a fixed width incision in the quadriceps tendon. [Diagram 2] FIG. 1 is a diagram of a conventional cutter. [Diagram 3] FIG. 1 shows a quadriceps tendon being incised at a constant thickness using a conventional cutter. [Figure 4] FIG. 1 is a perspective view of the present invention. [Diagram 5] FIG. 1 is a diagram showing the present invention being installed on the handle of an existing cutter. [Figure 6] FIG. 1 is a longitudinal cross-sectional view of a quadriceps tendon being incised at a constant thickness in accordance with the present invention. [Figure 7] FIG. 2 is a cross-sectional view of a quadriceps tendon being incised at a constant thickness in accordance with the present invention. [Explanation of symbols]

[0011] 1 Quadriceps tendon 2 Quadriceps tendon incised on both sides 3 patella 4. Sharp blade of conventional cutter 5 Conventional cutter handle 6. External dimensions of the present invention 7. Inside dimensions of the present invention 8. Thickness of the thick surface of the present invention 9. Sharp blade of the present invention 10. Thick Surface of the Invention 11 Existing cutter handle

Claims

[Claim 1] It is U-shaped and has a constant outer width but an inner dimension that is the thickness of the quadriceps tendon to be incised. One end is a sharp blade for incising, while the other end is a thick surface, and the center is held by an existing handle.

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