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A push knife for transverse carpal ligament

A ligament and knife handle technology, applied in the field of medical devices, can solve the problems of low strength and poor recovery of the transverse carpal ligament, and achieve the effect of good recovery and high section strength

Active Publication Date: 2021-07-16
NINGBO SIXTH HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of cutting the transverse carpal ligament is to cut it horizontally along the transverse carpal ligament. Since the sections are all in the same plane, the strength of the transverse carpal ligament at the section after healing is low and the recovery is poor.

Method used

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  • A push knife for transverse carpal ligament
  • A push knife for transverse carpal ligament
  • A push knife for transverse carpal ligament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment one, such as Figure 1 to Figure 9 Shown, a kind of transverse carpal ligament pushing knife comprises knife handle 2, and the front end of knife handle 2 is provided with the upper plate 3 that is attached to the upper surface of carpal transverse ligament 1, and the lower plate 5 that is attached to the lower surface of carpal transverse ligament 1; 3 and the lower plate 5 are provided with a blade 4, the blade 4 includes an integrally formed first plate segment 41, a second plate segment 42 and a third plate segment 43, the first plate segment 41 stands on the upper plate 3, the third plate Section 43 stands on the lower plate 5, and the second plate section 42 is connected to the edge of the first plate section 41 and the third plate section 43; An edge 421 is located at the second edge 422 at the junction of the second plate segment 42 and the third plate segment 43 . When in use, the patient’s wrist is fixed upward to expose the transverse carpal ligam...

Embodiment 2

[0043]Embodiment 2, the structure of embodiment 2 is similar to embodiment 1, the only difference is: the angle between the first plate segment 41 and the second plate segment 42 is an acute angle, the third plate segment 43 and the second plate segment The angle between 42 is an acute angle, such as Figure 10 shown. The cross-section of the transverse carpal ligament 1 cut out in embodiment two is as follows: Figure 11 shown. Comparing the sections of the transverse carpal ligament 1 cut out in Example 1 and Example 2, it is found that there is a V-shaped concave section 13 in Example 2, which is likely to cause improper insertion when rejoining, so the transverse carpal ligament of Example 2 1 The effect of reconnection is inferior to that of Embodiment 1.

Embodiment 3

[0044] Embodiment 3, the structure of embodiment 3 is similar to that of embodiment 1, the only difference is: the distance between the first edge 421 and the upper plate 3 is greater than the distance between the second edge 422 and the upper plate 3, as Figure 12 As shown, the section of the transverse carpal ligament 1 after cutting generally presents a shape from the connection end 11 to the free end 12, which generally becomes thinner suddenly and then thickens gradually, as shown in FIG. Figure 13 As shown, such a shape is not conducive to the nutrient supply of the transverse carpal ligament 1, and will cause secondary fracture due to the ultra-thin part between the connecting end 11 and the free end 12, so the transverse carpal ligament 1 of the third embodiment is reconnected Strength and degree of recovery are inferior to embodiment one and embodiment two.

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PUM

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Abstract

The invention discloses a push knife for transverse carpal ligament, which comprises a knife handle. The front end of the knife handle is provided with an upper plate attached to the upper surface of the transverse carpal ligament, and a lower plate attached to the lower surface of the transverse carpal ligament; A blade is provided. The blade includes an integrally formed first plate segment, a second plate segment and a third plate segment. The first plate segment stands on the upper plate, the third plate segment stands on the lower plate, and the second plate segment is connected to the first plate segment. The edge of the plate segment and the third plate segment, so that the first plate segment, the second plate segment and the third plate segment are in a Z-shaped bending structure; the blade also includes a The first edge is the second edge located at the intersection of the second plate segment and the third plate segment. When in use, the patient’s wrist is fixed upward to expose the transverse carpal ligament. The doctor holds the knife handle, clamps the transverse carpal ligament between the upper plate and the lower plate, and pushes the blade to cut off the transverse carpal ligament, finally making the transverse section of the transverse carpal ligament Divided into two cross-sections parallel to each other, and the strength of the section after healing is high and the recovery is good.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to a transverse carpal ligament push knife. Background technique [0002] The anatomical structure of the human hand has the transverse carpal ligament, and its thickness is within 3 mm. When performing surgery on the underlying tendons, etc., it is necessary to temporarily cut off the transverse carpal ligament, and then reattach the severed carpal transverse ligament after the operation is completed. . The traditional method of cutting the transverse carpal ligament is to cut it along the transverse direction of the transverse carpal ligament. Since the sections are all in the same plane, the strength of the transverse carpal ligament at the section after healing is low and the recovery is poor. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a transverse carpal ligament pusher with reasonable structural layout, cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/3209
CPCA61B17/3209
Inventor 洪锦炯胡浩良丁文全王晓峰李群
Owner NINGBO SIXTH HOSPITAL