JP3081576U - Spinal endoscopy knife - Google Patents

Abstract

(57) [Summary] (Problem corrected) [Problem] A knife for spinal endoscopy which can measure a piercing depth with a wide field of view, easy operation, without damaging nerves, blood vessels, dura mater, etc. provide. A blade (2) is provided along a slope at the tip of a shaft (1), the back side of the blade is rounded, and a scale (7) is provided from the tip. A marking 5 is provided on the grip 4 at the rear end of the shaft at a position indicating the direction of the tip blade surface. When the slide cover 6 covering the shaft portion is pulled toward the grip, a blade surface at the tip of the shaft appears, and when the slide cover 6 is pushed to the tip, the blade surface is covered.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a tissue cutting knife used in spinal endoscopy.

[0002]

[Prior art]

 In the field of spinal endoscopy surgery, there is no dedicated knife for tissue incision, and tissue incision is performed using a scalpel or pointed knife.

[0003]

[Problems to be solved by the invention]

 Inserting a scalpel or scalpel into a deep and narrow trocar exposes the blade and is likely to damage nerves, blood vessels, dura, etc. before reaching the tissue to be incised . Although these blades are single-edged, the back side of the blade is not rounded, so it is easy to damage other tissues. Damage to nerves, blood vessels, dura, etc., often results in severe damage. In addition, conventional scalpels and pointed swords are themselves thick and significantly impede the visual field.

[0004]

[Means for Solving the Problems]

 The tip of the shaft is cut diagonally and has a blade along the slope. The back side of the blade is rounded and graduated from the tip. The rear end of the shaft is thicker and has a grip with a non-slip surface, and the position indicating the direction of the tip blade is cut and marked. The entire slide cover that covers the shaft is the same thickness as the grip and is flush with the grip.The rear end has a non-slip surface similar to the grip, and when the slide cover is pulled toward the grip, the tip of the shaft The blade surface appears, and when pushed to the tip, the blade surface is covered.

[0005]

[Embodiment of the invention]

 FIG. 1 illustrates a specific example of the present invention. The tip of the shaft 1 is cut obliquely and has a blade 2 along the slope. The back side of the blade 2 has a rounded shape 3 and a scale 7 from the tip. This makes it possible to measure the insertion depth of the blade. The rear end of the shaft 1 is thicker and forms a grip 4 with a non-slip surface, and the position indicating the direction of the tip blade surface 2 is cut and marked 5. The entire slide cover 6 that covers the shaft 1 is the same thickness as the grip 4 and is flush with the grip 4. The rear end has a non-slip surface similar to the grip 4, and the slide cover 6 is moved to the grip 4 side. When pulled, the blade surface 2 at the tip of the shaft 1 appears. The surgeon can operate the slide cover 6 with one hand while holding the grip 4. Suitable materials are stainless steel SUS304, SUS420J2 and SUS330.

FIG. 2 is a top view of FIG. The marking portion 5 is cut flat obliquely so that the direction of the tip blade 2 can be checked at hand.

FIG. 3 shows a state where the slide cover 6 is pushed out to the tip. The blade surface is covered, and in this state, the blade surface is exposed after inserting to the target position.

[0008]

[Effect of the invention]

 As explained above, the knife for spinal endoscopic surgery according to the present invention does not damage other tissues during insertion, ensures a good field of view, and allows the blade to be exposed with only one hand. . Since the scale is attached to the tip, the surgeon can easily know the insertion depth. The grip is marked with the direction of the blade so that it is not cut in the wrong direction.

[Brief description of the drawings]

FIG. 1 is an external view of a spine endoscopic surgical knife with its blade exposed.

FIG. 2 is a view of FIG. 1 as viewed from above.

FIG. 3 is an external view when the blade is covered.

[Explanation of symbols]

 Reference Signs List 1 shaft 2 blade surface 3 rounded surface 4 grip 5 marking 6 slide cover 7 scale

Claims (1)

[Utility model registration claims] 1. A knife for tissue incision used in spinal endoscopic surgery, wherein the tip of a shaft is obliquely cut, a blade is provided along a slope, and the back side of the blade has a rounded shape. It has a scale from the tip, the rear end of the shaft is one step thicker, it is a grip with a non-slip surface, and the position indicating the direction of the tip blade surface is sharpened and marked, The slide cover that covers the shaft part is the same thickness as the grip as a whole and is flush, the rear end has a non-slip surface like the grip, and when the slide cover is pulled to the grip side, the blade at the tip of the shaft A tissue incision knife used in spinal endoscopy, which has a structure where a surface appears and is pushed out to the tip to cover the blade surface.