JPS6223457Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a suture needle used for surgery, and particularly to a cutting edge of the suture needle.

<Prior Art> As shown in FIG. 14, conventional suturing needles include a conical needle 1 having a circular cross section, and a triangular needle 2 having a triangular cross section as shown in FIG. As shown in FIG. 16, there is also an inverted triangular needle 3 having an inverted triangular cross section.

<Problems to be Solved by the Invention> The conventional suturing needle is constructed as described above, and this conventional needle has the following problems.

In other words, it is desirable that the suture needle used to suture the wound during surgery has a sharp blade, leaves little tissue scarring due to needle penetration, and leaves no trace after healing. It is no exaggeration to say that the quality of the outcome after surgery is determined by whether or not the wound is sutured skillfully and at an appropriate depth using a superior cutting edge.

By the way, recently microsurgery (Micro
-Surgery) is a surgical method that involves suturing while magnifying the wound using a magnifying glass.
For example, most of the above-mentioned methods are used in corneal suturing surgery for eyeballs.

However, in the case of corneal suturing, since the cornea is a thin membrane, even if the most suitable triangular needle 2 or inverted triangular needle 3 of the conventional suturing needles mentioned above is used, the sharp end of the cutting edge is not aligned with the axis of the needle. Because it is located below (for triangular needles) or above (for inverted triangular needles), it is difficult to pierce the tissue deeply or shallowly and achieve complete suturing, making it difficult to suture the cornea to the desired depth. was.

Furthermore, according to the conventional suture needle described above, the scars inflicted on the tissue after piercing are as shown in Fig. 14C, Fig. 15C,
As shown in the circle in FIG. 16C, the conical needle 1 leaves radial laceration marks a, and the triangular needles 2 and inverted triangular needles 3 leave laceration marks b and c resembling the cross-section of a triangular blade, respectively. These laceration marks a, b, c
Both will be large.

Therefore, conventional suture needles are not only unsuitable for suturing thin membranes such as the cornea, as there is a risk of tearing the membrane from the marks left after piercing, but also the triangular needles and inverted triangular needles mentioned above are not suitable for suturing thin membranes such as the cornea. Because the sharp end of the blade is located either below or above the axis of the needle, the operator must be especially careful about the depth of penetration, and there is a risk of failure in the surgery if suturing is not done carefully. Was.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a suture needle with a cutting edge that can solve the problems of the conventional needles described above.

<Means for solving the problems> The structure of the present invention for solving the above problems will be explained using FIGS. 1 to 6, which correspond to embodiments. Alternatively, the upper and lower sides of the steel round bar A are flattened to form a tapered flat upper surface 4 and lower surface 5 so that the tip side becomes gradually thinner, and the upper surface 4 is cut diagonally downward toward the tip. A descending surface 6 is provided, and the left and right sides are cut diagonally symmetrically from the center of the lower surface 5 to provide a left descending surface 7 and a right descending surface 8, and ridge lines 9a, 9b, where the three slopes 6, 7, 8 intersect, A blade is formed at 9c, and
The intersecting tips of the respective ridge lines are formed into sharp edges 10, and the cross-sectional shape of the tip portion formed by the three slopes is configured to have a generally flat triangular shape with the descending slope 6 as the base. It is something.

<Operation> Next, the operation of the present invention will be explained. When the suture needle is inserted into the site to be sutured, first, the sharp end 10 easily pierces the tissue and makes a small incision in the tissue, and then the blades formed on the ridges 9a, 9b, and 9c cut through the tissue and puncture the tissue. Pass. Next, when the end point of the blade, that is, the upper point of the descending surface 6, reaches the tissue, since no blade is formed in the subsequent part, the needle does not cut the tissue on the upper surface 4, lower surface 5, and both sides. It moves forward by elastically expanding the hole formed by the blade.

When the needle pierces as described above and the rear end of the needle is pulled out of the tissue, the expanded hole returns to its original size due to the elasticity of the tissue, and the tissue remains as shown in Figure 7. A substantially linear puncture mark d remains.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings. 1 to 6 show the cutting edge of a suture needle according to an embodiment of the present invention. In these figures,
A is a long and slender stainless steel or steel round bar.
is cut to a certain length. The upper and lower sides of the round bar A are flattened by press working or the like to form a tapered upper surface 4 and lower surface 5 so that the tip side becomes gradually thinner. And for the top surface 4,
The upper surface 4 is cut diagonally downward toward the tip to form a descending surface 6, and the lower surface 5 is cut diagonally symmetrically from the central axis to the left and right to form a descending surface 6. The slope 7 and the right descending slope 8 are formed so as to intersect with the descending slope 6 in the tip direction, and thereby,
A blade is formed by the ridge lines 9a, 9b, and 9c generated by the intersection of the three slopes 6, 7, and 8, and the intersecting tip of each of the ridge lines has a sharply polished sharp edge 1.
0, and this sharp end 10 will be located near the axis (X-Y) of the needle.

The cross-sectional shape of the tip formed by the three slopes 6, 7, and 8 is a flat, approximately isosceles triangle with the descending slope 6 as the base.

The cutting edge of the suture needle in the example is constructed as described above, and an example of its manufacturing method is shown in FIGS.
This will be explained with reference to FIG. First, the round bar A is cut to a certain length, and a thread hole (a hole for attaching a suture thread) 11 is formed at the rear end (see FIG. 8). Then, the round bar A is flattened using a press or the like to form an upper surface 4 and a lower surface 5 which are tapered so that the tip side becomes gradually thinner as shown in FIG. This can be molded in one step by embossing or the like. Note that during the applanation, care should be taken not to crush the thread hole 11 portion.

Next, the upper surface 4 at the tip of the round bar A is cut diagonally downward toward the tip using a polisher or the like, as shown by the chain line 12 in FIG. 9, to form a descending surface 6 (see FIG. 10).

Next, one side (left side or right side) from the axis of the lower surface 5 at the tip of the round bar A is cut diagonally with a polisher or the like so that it intersects with the descending surface 6 in the tip direction. Figure 12 (Figure 12 is the first
As shown in FIG. 1 (bottom view), a left descending surface 7 is formed, and the remaining other side surface is formed as a left descending surface 7 so as to intersect with the above-mentioned descending surface 6 and left descending surface 7 at the tip direction, as shown by the chain line in FIG. 12. By cutting diagonally symmetrically with the slope 7 to form the right descending slope 8, the ridge lines 9a, 9 created by the intersection of the three slopes 6, 7, 8 are formed.
Blades are formed at b and 9c, and the intersecting tips of each of the ridge lines are formed into a sharp end 10, and this sharp end 1
0 will be located near the needle axis (X-Y) (see Figure 13).

Moreover, as a result of the above, the cross-sectional shape of the tip portion formed by the three slopes 6, 7, and 8 has a flat, approximately isosceles triangular shape with the descending slope 6 as the base.

After the above steps, the needle (round bar A) is curved into a semicircular arc shape by any means to produce a suture needle.

In addition, in the embodiment, in the step of forming the three slopes 6, 7, and 8, the descending slope 6 is first formed, and then the left and right slopes 7, 8 are formed. In forming the three slopes 6, 7, 8, the left and right descending surfaces 7, 8 may be formed by cutting first, and finally the descending surface 6 may be formed by cutting.

<Effect of the invention> As explained above, the cutting edge of the suture needle according to the invention has a flat upper surface that is tapered so that the top and bottom of the stainless steel or steel round bar A are flattened so that the tip side becomes gradually thinner. The upper surface 4 is cut diagonally downward toward the tip to provide a descending surface 6, and the left and right sides are cut diagonally symmetrically from the center of the lower surface 5 to form a left descending surface 7 and a right descending surface. A slope 8 is provided to form a blade at the ridge lines 9a, 9b, 9c where the three slopes intersect, and the intersecting tip of each of the ridge lines is formed into a sharp edge 1.
0. Therefore, depending on the adjustment of the cutting angle when forming the slope, the descending slope 6 formed by cutting the upper surface 4 may have a sharp edge 10 on or near the axis (X-Y) of the needle. Since the needle can be positioned, it is possible to eliminate various disadvantages in suturing surgery that occur when the sharp end of the blade is located below or above the axis of the needle, as with conventional triangular needles or reverse triangular needles. The blade part of the suture needle of the present invention has a shorter blade length, that is, the ridge line, compared to conventional suture needles, so when grasping the needle with a needle holder, unlike conventional suture needles, Since the part without the blade can be grasped, there is no damage to the blade, and the puncture marks caused by the long cutting edge of conventional needles can be magnified due to shaking of the operator's hand during suturing. There is no risk of it happening. Furthermore, as shown in FIG. As a result, the piercing mark d also becomes approximately linear as shown in the circle in FIG. 7. Thus, the suture needle with the cutting edge of the present invention has many features.

[Brief explanation of the drawing]

Figures 1 to 6 show one embodiment of the cutting edge of the suture needle according to the present invention. Figure 1 is a plan view showing only the needle tip, Figure 2 is a side view, and Figure 3 is a side view. Similarly, FIG. 4 is a bottom view, FIG. 4 is a front view of the needle tip, FIG. 5 is a sectional view taken along the - line in FIG. 2, and FIG.
7 is a diagram showing the puncture marks of the needle of the present invention, FIGS. 8 to 13 are explanatory diagrams showing an example of the manufacturing process, and FIGS. 1 is a diagram for explaining a suture needle,
Figure A is a perspective view of the needle tip portion, Figure B is a front view, and Figure C is a view showing puncture marks of each suture needle. A...Round bar, 4...Top surface, 5...Bottom surface, 6...
Descending slope, 7... Descending slope, 8... Right descending slope, 9a,
9b, 9c...Ridge line, 10...Sharp end.

Claims (1)

[Scope of utility model registration request] A flat upper surface 4 and a lower surface 5 are formed by flattening the top and bottom of a stainless steel or steel round bar of a certain length so that the wall becomes gradually thinner on the tip side, and the upper surface 4 is tilted diagonally downward toward the tip. Cut to descending slope 6
is provided, and the left and right sides are cut diagonally symmetrically from the center of the lower surface 5 to provide a left descending surface 7 and a right descending surface 8, and a blade is formed on the ridgeline 9 where the three slopes 6, 7, and 8 intersect, and , characterized in that the intersecting tips of each of the ridge lines are formed into sharp edges, and the cross-sectional shape of the tip portion formed by the three slopes is configured to exhibit a flat, approximately isosceles triangle with the descending slope 6 as the base. The cutting edge of the suture needle.