WO2002045601A1

WO2002045601A1 - Surgical knife

Info

Publication number: WO2002045601A1
Application number: PCT/JP2000/008574
Authority: WO
Inventors: Shoichi Nakamura; Nagahisa Machida
Original assignee: Acp Japan Co., Ltd.; Machida Toolex Co., Ltd.
Priority date: 1999-05-18
Filing date: 2000-12-04
Publication date: 2002-06-13
Also published as: JP2000325355A

Abstract

A surgical knife which is formed with air vent holes in the vicinity of the cutting edge of the blade to provide improved sharpness during the incision without the possibility of incised living tissue sticking to the blade surface and improved visibility of the incised surface or cut region. The surgical knife has a stem and a cutting edge, wherein one or a plurality of through-holes extending from the front to the back to serve as air vent holes during the incision of living tissue are formed in the vicinity of the cutting edge surface formed on the blade. The through-holes are not limited in shape to a circle; they may be oval or polygonal or in the form of slits or other elongated openings. They may also be a plurality of very small holes.

Description

Specification

Surgical scalpel

Technical field

The present invention relates to a surgical scalpel used as a medical instrument for the human body and livestock. Background art

Generally, a scalpel used in a surgical operation is composed of a blade portion and a handle portion, and there are several hundred types of blades having different shapes according to purposes, and several thousand types or more when considering the size.

In order to make an accurate incision, the incision scalpel must have a cutting blade with a blade that can transmit the feeling of the incision to the surgeon as much as possible. What could satisfy the demands could not be realized.

In addition, the scalpel for incision requires that the incised surface or cut site be visible to the surgeon as much as possible in order to prevent the incision deeper than necessary because the biological tissue at the incised site opens. Could not be realized to satisfy these requirements. Disclosure of the invention

The present invention provides a relief hole for air in the vicinity of the cutting edge of a blade, thereby achieving both rigidity and sharpness when cutting living tissue, and furthermore, the relief hole has a role of an incision depth scale. The purpose is to provide a scalpel.

Further, the present invention provides a surgical scalpel having good visibility of an incision surface or a cut site at the time of incision, without the incised body tissue sticking to the blade surface due to an air escape hole provided in the blade. The purpose is to:

The scalpel according to the present invention is provided near the cutting surface formed on the blade of the blade. It has a through hole extending from the front surface to the back surface.

The surgical scalpel according to the present invention has a plurality of through holes near the cutting surface formed on the blade of the blade portion and extending from the front surface to the back surface of the blade along the cutting surface.

This through hole may be an elongated slit or a minute hole, and the shape of the through hole may be a circle, an ellipse, a triangle, a square, a polygon, or a slit arranged in a radial pattern.

Further, the surgical scalpel according to the present invention has a through hole extending from the front surface to the rear surface in the vicinity of the cutting surface formed on the blade of the blade portion, and the blade portion can be removed from the handle and replaced. The blade is attached to the handle by screwing screws or elasticity of a panel or collet chuck.

Further, a substance having water repellency is applied to the blade. Brief description of the drawings

FIG. 1 is a view showing a first embodiment of a scalpel according to the present invention.

FIG. 2 is a view showing the blade part of FIG.

FIG. 3 shows an embodiment in which one circular through hole is provided at the tip of the blade.

FIG. 4 shows an embodiment in which two elliptical through holes are provided at the tip of the blade.

FIG. 5 shows an embodiment in which through holes are provided in a line along the cutting edge surface.

FIG. 6 shows an embodiment in which a number of minute holes are provided in a portion where the cutting surface of the blade is provided.

FIG. 7 is a view showing a second embodiment of the scalpel of the present invention.

FIG. 8 is a view showing the blade portion of FIG.

FIG. 9 shows an embodiment in which slits arranged radially are provided at the tip of the blade.

FIG. 10 shows a third embodiment in which the blade is attached to the handle by a collet chuck. FIG. 11 shows an embodiment in which a through hole is provided along the cutting edge surface and a substance having water repellency is applied to the tip of the blade. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the parts denoted by the same reference numerals represent the same parts, and the detailed description is omitted.

FIG. 1 is a view showing a first embodiment of a scalpel according to the present invention. The blade 2 is detachably fixed to the handle 3 of the scalpel 1. The blade portion 2 is formed by integrating a blade 4 and a mounting portion 5 to the handle portion 3.

The blade 4 is formed into a desired shape by precisely pressing a steel material capable of achieving both rigidity and sharpness, for example, molybdenum vanadium steel. Then, the blade 4 is subjected to electrolytic polishing to remove burrs formed by press working, so that the blade 4 is securely mounted on a special jig.

Next, grinding is performed using the above-mentioned dedicated tool. At this time, in order to always maintain the same sharpness for complicated blade shapes such as R, use an NC-controlled grinding machine so that the grinding direction is a fixed angle from the R center, and interlock with a special jig, Process the shape. After that, the surface of the blade 4 along the cutting surface 6 by laser beam machining, electric discharge machining, plastic working (punch press), etc. near the cutting surface 6 while being fixed to the special jig. One or two or more rows of through holes 7 reaching from the bottom to the back.

Also, the surface is machined to any fine shape (for example, dimple shape, slit shape, etc.) using laser beam machining, electric discharge machining, ion edging, etc. After that, the finishing process is performed using several types of grindstones using a special jig as described above. Then, in order to match the sharpness of the blade to the working characteristics as a final processing step, fine burrs attached to the blade edge are removed again by electrolytic polishing. The combination of the fine processing of the through holes 7 and the surface and the two types of fine shapes (for example, dimple shape, slit shape, etc.) allows the escape of air, body fluid (blood), fat, etc. at the time of incision of the living tissue. Cut surface does not stick to blade 4. In recent years, it is common practice to use blade 2 only once to prevent disease transmission associated with contact with contaminated blood. Therefore, in the embodiment, the blade part 2 is made replaceable with the handle part 3. The handle 3 may be made of metal or plastic, but is provided with a slip stopper 8 so that the scalpel 1 can be securely gripped during surgery.

FIG. 2 is a view showing the blade portion 2. The blade 4 is fixed to the mounting part 5 and integrated. A male screw 9 is formed in the mounting portion 5, and the blade portion 2 is screwed to a female screw (not shown) formed in the handle portion 3 and is detachably mounted. Attaching the blade to the handle by screwing in this way does not cause play due to the attachment, and is suitable for a small scalpel with a small blade for performing precise surgery. As shown in FIGS. 1 to 3, a mark 15 indicating the distance from the tip of the blade may be engraved on the front or back surface of the blade. At this point, the mark 15 may be used also as a through hole or a slit provided near the cutting edge surface according to the present invention. With such a mark 15, it is possible to easily know the standard of the incision depth of the skin at the time of surgery. Needless to say, the mark 15 indicating the distance from the tip of the blade can be similarly applied to other embodiments according to the present invention.

FIGS. 3 to 6 and 9 show the tip of the blade.

In the embodiment of FIG. 3, one circular through hole 7 is drilled from the front surface to the back surface of the blade 4 near the arc-shaped cutting surface 6 provided at the tip of the blade 4 according to the shape. . At the time of incision, the living tissue is cut with the taper of the cutting edge surface 6, and the incision is opened due to the thickness of the blade and the presence of the through hole 7 that acts as an air escape hole. There is no. As a result, the vicinity of the tip of the blade surface 4 can be visually recognized, so that the surgeon can easily perform the incision operation.

In the embodiment shown in FIG. 4, a small elliptical through hole 7a is provided near the arc-shaped cutting surface 6 provided at the tip of the blade 4 according to the shape thereof, and a larger ellipse is provided next to the hole. The through hole 7b is drilled. In this embodiment, even if the feeling at the time of incision is slightly different, the same effect as the embodiment shown in FIG. 3 is obtained. can get. The number of elliptical holes is not limited to two, and three or more holes may be provided.

In the embodiment of FIG. 5, the cutting edge 6 is provided near the cutting edge 6 at the tip of the blade 4 and along the cutting edge 6 in comparison with the radius of curvature of the cutting edge 6, about one fifth to one tenth. A plurality of circular through holes 7c having a radius of

In this embodiment, the same effect can be obtained even if the feel at the time of incision is slightly different from that of the other embodiments.

In the embodiment shown in FIG. 6, a number of minute through holes 7d are formed in the blade surface 4 near the portion where the cutting surface 6 is provided. In this embodiment, the feeling at the time of incision is slightly different from that of the other embodiments, but the same effect can be obtained.

The through hole 7 formed in the blade 4 does not need to be circular, and may be any shape such as an ellipse, a triangle, a square, a polygon, and a star.

FIG. 7 is a view showing a second embodiment of the scalpel according to the present invention. The blade 2 is detachably fixed to the handle 3 of the scalpel 1. The blade part 2 and the blade 4 and the mounting part 5 are formed in a body by the same manufacturing method using the same material as in the first embodiment.

The peripheral edge of the blade 4 is polished, and the cutting surface 6 is formed in a tapered shape. An elongated slit 10 is formed in the blade 4 near the cutting edge surface 6 so as to penetrate from the front surface to the rear surface. The number of the slits 10 is not limited to one, and a similar effect can be obtained by forming a plurality of slits.

FIG. 8 is a view showing the blade portion 2. The insertion portion 11 provided at the other end of the blade 4 is inserted into the handle portion 3 and is attached to the handle portion 3 by means of a panel or the like in a known manner.

In the embodiment shown in FIG. 9, the slits 10a are provided in the vicinity of the tip of the blade 4 provided with the cutting surface 6 so as to penetrate from the front surface to the rear surface and are arranged in a radial pattern.

It goes without saying that the surgical scalpel described in the above embodiments can be used not only for the human body but also for the surgical operation of animals such as livestock animals.

If the material of the mounting part 5 is a material that can securely fix the blade 4 to the mounting part 5, There is no particular limitation. It is also possible to adopt a structure in which the blade 4 is detachably mounted directly on the handle 3 without the intervention of the mounting portion 5.

Further, the both parts may be formed as an integral structure without having to replace the blade part 2 with the handle part 3.

The embodiment of FIG. 10 is a diagram showing a third embodiment in which the blade portion 2 is attached to the handle portion 3 by the collet chuck 13. A plurality of through holes 7 are formed in the cutting surface 6 of the blade portion 2. The blade portion 2 may have any cutting surface as long as it can be fixed by the collet chuck 13.

The embodiment of FIG. 11 is basically the same as the first embodiment in that a plurality of through holes 7 are formed along the cutting surface 6 of the blade 4. However, a substance 12 having water repellency is applied near the tip of the blade 4. As the substance having water repellency, synthetic resin, paraffin, casein, soybean protein, 蠟, and the like are suitable. In the examples, one type was selected and applied.

As a result, not only oil but also moisture is increased during the incision operation, the visibility of the incision surface or the cut site is improved, and the incision operation is facilitated.

According to the present invention, since a through hole serving as an air escape hole is provided in the vicinity of the cutting surface of the blade, the cut portion of the incised portion becomes sharp and opens naturally, and furthermore, the escape hole has a necessary minimum incision. It becomes a depth scale. Therefore, the cut living tissue does not stick to the blade surface, and the incision operation can be easily performed. In addition, since the cut surface of the living tissue is not destroyed, anastomosis is easy, and the wound is healed quickly.

Furthermore, since the incision surface opens cleanly, surgery can be performed with good visibility, maintaining the correct incision depth, and the lower blood vessels and the like are not damaged.

Claims

The scope of the claims

1. A surgical scalpel having a handle portion and a blade portion, the surgical scalpel having a through hole extending from a front surface to a rear surface in the vicinity of a cutting edge surface formed on a blade of the blade portion. Female.

2. A surgical scalpel having a handle portion and a blade portion, the plurality of scalpels reaching from the surface of the blade to the back surface along the cutting surface near the cutting surface formed on the blade of the blade portion. A surgical scalpel having a through hole.

3. The surgical scalpel according to claim 1, wherein the through hole is an elongated slit extending from the front surface to the rear surface of the blade.

4. The surgical scalpel according to claim 1, wherein a water-repellent substance is applied to the blade.

5. The surgical scalpel according to claim 1, wherein the through hole is a plurality of minute holes.

6. The surgical scalpel according to claim 1, wherein the shape of the through hole is a circle, an ellipse, a triangle, a quadrangle, a polygon, an elongated slit, or a slit arranged in a radial pattern. .

7. The surgical scalpel according to claim 6, wherein a mark indicating a distance from a tip of the blade is engraved on a front surface or a rear surface of the blade.

8. A surgical scalpel having a handle portion and a blade portion, wherein the blade portion has a through hole extending from a front surface to a back surface in the vicinity of a cutting surface formed on a blade of the blade portion. A surgical scalpel, which can be removed from and replaced.

9. The surgical scalpel according to claim 8, wherein the blade is attached to the handle by screwing screws.

10. The surgical scalpel according to claim 9, wherein the blade is attached to the handle using elasticity of a panel. 10.

11. The surgical scalpel according to claim 8, wherein the blade is attached to the handle using a collet chuck.