JPS6057337B2 - Select passing suture needle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surgical suture needle, particularly a suture needle suitable for use in tissues where hard fibrous tissue and soft tissue intersect.

Conventionally, suturing needles have a structure in which the tip is pointed, gradually becomes thicker toward the needle body, and is cut off to form the needle body, which serves as a thread binding portion that is associated with the thread. In this case, it is common for the needle to gradually become thicker from the tip to the main body, which was considered necessary and optimal for the suture needle to penetrate.

In a layered tissue or a directional fibrous tissue,
A spatula-shaped suture needle was used with good results. In other words, the spatula-shaped needle is passed between the layers in a direction so as to be inserted between the layers. Conventionally, emphasis was placed on how sharp the tip of this spatula-shaped suture needle could be.
The tip angle in the thickness direction is sharp and 200 or less.
Many of them were up to about 50 in diameter, and they were used to cut straight through hard tissues such as blood vessels, nerve fibers, and muscle fibers in the fibrous tissue and suture them. However, post-operative healing is faster and better when blood vessels, nerve fibers, muscle fibers, etc. are sutured rather than cut.
Therefore, in the present invention, the tip of the suture needle is made slightly blunt and flexible in the outward and outward directions of the curve, so that it can avoid and pass through hard tissues such as blood vessels and nerve fibers, thereby solving the conventional drawbacks. This is what I did.

Next, an embodiment of the suturing needle according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a conventional spatula-shaped suturing needle 1 in a state before it is bent.

The tip angle α is usually 23.50 to 260 and is sharp, and consists of a cutting blade 2 having a square cross section, a bottom cutting blade 3, a main body 4, and a thread binding portion 5. Conventional suturing needles with such a configuration have a tip angle that is too sharp, so that they can even penetrate blood vessels and the like. FIGS. 2 and 3 show an embodiment of the present invention, in which a suture needle 6 is composed of a distal end portion 7, cutting blades Ba and 8b, and a main body 9 and a thread connecting portion 10.

The tip 7 is a blade formed with a of 23.50 to 260, and is slightly blunted by raising it by, for example, 70 to 150 of β. The cutting blade is composed of Ba and 8b, Ba is the upper cutting blade, 8b is the corner of the base of the triangular cross section and the trapezoid,
The cross-sectional area of the neck portion 11, which gradually increases from the tip portion 7 by hollowing out the portion indicated by the broken line in FIG. 3, decreases on the contrary. After passing through this neck 11, the number increases sequentially, and the main body 1
The thickness of the thread reaches the thread joining part 10. B, C, D in Figure 3
, E indicate the cross-sectional area at each point of the suture needle 6. The suture needle 6 constructed as described above is curved so that the cutting edge 8b is on the inside as shown in FIG.

Furthermore, the tip angle has been rounded up by r~15 to make it blunter than before, and the neck portion 11 has been made thinner to provide flexibility, allowing it to flex inward and outward of the curve, allowing the suture needle 6 to penetrate into the tissue. If it comes into contact with a hard part inside, such as a blood vessel or nerve fiber, it will avoid this and pass through.

The thickness of the blood vessels and nerve fibers that were avoided is almost 115 to 1 degree of the needle diameter, so if the necessary deflection of the needle tip is taken as the radius, it is 1110 to 112 degrees of the needle diameter. It is. On the other hand, if the width is constant, the amount of deflection of the needle is inversely proportional to the cube of the thickness.
If it is 0.8, the force required to deflect the same amount is 112.
For example, needle diameter 0.33? It is a stainless steel suture needle with a needle length of 117gt, and the thickness of the part corresponding to the neck 11 of a conventional needle is 0.
The suture needle of the present invention had a length of 0.1 m, whereas the suture needle of the present invention had a length of 0.1 m. ``The bending force of the conventional needle is 2.5''
y, but in the present invention it decreased to 1.3f.
Furthermore, when this suture needle was used in clinical plastic surgery, it was confirmed that it had a very good cutting ability and did not cut many microvascular nerve fibers. In particular, this effect will be further enhanced if the tip is blunted. This is based on a completely new concept that does not exist in conventional suturing needles, in which the suturing needle selectively passes through soft parts of the tissue. With conventional suture needles, emphasis was placed on how to make each suture easier and how to make the wound smaller, without considering which organs within the tissue should be cut to speed up healing. . Therefore, suturing by selective passage using the suture needle of the present invention has the effect that healing after surgery is significantly faster than when blood vessels or nerve fibers are cut.

In another embodiment of the present invention, the neck 11 of the cutting blade 8b may be made flexible as a portion that does not increase in cross-sectional area, without reducing it. Even with this configuration, the same effects as in the above embodiment can be obtained.

Furthermore, the suture needle need not be curved as shown in FIG. 2, but may be straight. In the above embodiments, the spatula-shaped needle is mainly suitable for layered tissues, but other suturing needles such as triangular needles, pentagonal needles, round needles, blunt needles, etc. can also be used to treat fibrous tissue and soft tissue. A similar effect exists for suturing intersecting tissues.

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional suturing needle, Fig. 2 is a plan view showing an embodiment of the present invention, and A to F in Fig. 3 are a side view and a plan view showing an embodiment of the present invention. Figure, and respective B and C
, D, and E points. 6... suture needle, 7... tip, 8a,
8b...cutting blade, 9...main body, 10...
Thread joint part, 11...Neck part.

Claims (1)

[Claims] 1. At the tip of the needle, the tip angle is set to be less than 30°, and there are a portion where the cross-sectional area gradually increases, a subsequent portion where the cross-sectional area decreases or does not increase, and a portion where the cross-sectional area increases. Furthermore, a suture needle characterized in that the needle tip portion is flexible.