Cutter for incision of quadriceps tendon in partial layer
The cutter's U-shaped design with a thick surface for direct force application addresses handle distortion issues, enabling precise partial-thickness incisions of the quadriceps tendon, reducing complications.
Patent Information
- Application Number
- JP2023188033
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-10-16
- Publication Date
- 2025-11-18
AI Technical Summary
Conventional cutters for horizontally incising the quadriceps tendon face challenges in transmitting force effectively due to handle distortion, leading to irregular incisions and potential severing of the tendon.
A cutter design with a U-shaped configuration featuring constant outer width and variable inner width, incorporating a thick surface for contact with the tendon surface, allowing direct force application to a sharp blade for controlled incisions.
Enables precise, partial-thickness incisions of the quadriceps tendon without distortion, reducing complications such as pain and muscle weakness by maintaining consistent thickness and smooth gliding over the tendon surface.
Smart Images
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Abstract
Description
[Technical Field]
[0001] The present invention relates to a cutter for making a horizontal incision of a constant thickness in the quadriceps tendon. [Background technology]
[0002] Anterior cruciate ligament rupture is a common injury among athletes. Treatment requires surgery. The surgical technique involves harvesting a muscle tendon from another muscle and using it as a graft. In recent years, the quadriceps tendon has attracted attention as a graft. The quadriceps tendon can be harvested using a U-shaped cutter that can make a uniform incision perpendicular to and on both sides of the quadriceps tendon (1) (Figure 1). However, because the quadriceps tendon is thick, full-thickness tendon harvesting is required, which requires thinning after harvesting. This means that a larger-than-necessary thickness of the quadriceps tendon is harvested. As a result, complications include pain at the harvest site and muscle weakness. To harvest a thin, partial-thickness quadriceps tendon rather than a full-thickness harvest, a horizontal incision cutter has already been developed. Summary of the Invention [Problem to be solved by the invention]
[0003] Conventional technology has 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, while the sharp blade (4) is located within the quadriceps tendon, parallel to the handle and at a distance, making it difficult to transmit force to the blade even when the handle is pressed (Figure 3). As a result, the handle becomes distorted, the incision surface becomes irregular and thin, and the quadriceps tendon may be severed. The present invention is intended to solve the above problems. [Means for solving the problem]
[0004] A cutter for incising the quadriceps tendon, External dimensions teeth Constant In the width direction Inner dimensions are incised By quadriceps tendon Parts taken from Thickness The size is determined according to , The width direction one end to To make an incision of blade is provided, and the other end has a surface facing the inner surface of the blade Thick surface The cutter has a portion. central part teeth Pattern but grasping The part to be is. [Effects of the Invention]
[0005] The present invention has the above-described configuration and therefore has the following advantages. (a) It is U-shaped, and the outer dimension (6) is constant in width, but the inner dimension (7) 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 other end is inserted into the thick surface. Department (10) is in contact with the surface of the quadriceps tendon. The handle (11) is in contact with the cross section of the quadriceps tendon (1) cut perpendicularly to both sides of the tendon at a certain width. When the handle is advanced, force is applied directly to the sharp blade (9) (Figure 6). (b) The thick surface is in contact with the surface. Department (10) Therefore, by holding the handle and moving it forward, the quadriceps tendon can be incised at a constant thickness (Figure 7), and because it is flat, it glides over the surface of the quadriceps tendon and does not cut it. (c) Thick surface Part (10) By varying the thickness of the tendon (8), the thickness of the quadriceps tendon can be determined. BEST MODE FOR CARRYING OUT THE INVENTION
[0006] It is U-shaped, and the outer dimension (6) is constant in width, but the inner dimension (7) is the thickness of the quadriceps tendon to be incised (Figure 4). One end has a sharp blade for incision. (9) is but, The other end is a thickened surface for determining the thickness of the quadriceps tendon. Part (10) Yes do. The center portion is gripped with an existing handle. The present invention has the above-mentioned configuration.
[0007] The present invention, configured as described above, is used as follows: To use the present invention, first, a standard U-shaped cutter is used to vertically incise the surface of the quadriceps tendon to a fixed width (Fig. 1). Next, the present invention is attached to the handle (11) of the standard cutter (Fig. 5). Thick surface of the present invention Department (10) The inner surface of The sharp blade (9) at one end is inserted into the incised surface of the quadriceps tendon so that the blade is in close contact with the surface of the incised quadriceps tendon. Department (10) The inner surface of The handle is advanced so that it is in close contact with the quadriceps tendon (Fig. 6). (7) The quadriceps tendon can be incised in partial thickness (Figure 7). [Brief explanation of the drawings]
[0008] [Figure 1] A diagram showing a constant width incision in the quadriceps tendon. [Figure 2] FIG. 1 is a diagram of a conventional cutter. [Figure 3] This is a diagram showing 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. [Figure 5] FIG. 1 is a diagram showing the present invention 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. 1 is a cross-sectional view of a quadriceps tendon being incised at a constant thickness in accordance with the present invention. [Explanation of symbols]
[0009] 1 Quadriceps tendon 2. Quadriceps tendon incision on both sides 3 patella 4. Sharp blade of conventional cutter 5 Conventional cutter handle 6. Outer dimensions of the present invention 7. Inner 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 present invention 11 Existing cutter handle
Claims
1. A cutter for incising the quadriceps tendon, The cutter has a constant outer dimension in the width direction, and an inner dimension in the width direction that is set to a size corresponding to the thickness of the portion to be taken from the quadriceps tendon by incision, and is provided with a blade for making the incision at one end in the width direction, and a thick surface portion with a surface facing the inner surface of the blade at the other end in the width direction.
2. Further comprising a central portion connecting the blade and the surface portion, The cutter according to claim 1 , wherein the central portion is a portion where a handle is gripped.