JPS6112976Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a suture needle with surgical thread. As shown in Fig. 1, conventional means for attaching thread to a suture needle include drilling a mounting hole in the rear end of the suture needle 1, inserting the suture thread, and then caulking the thread to secure the thread. .

However, a disadvantage of this type of suture needle is that because a step is formed between the suture needle 1 and the thread, passage resistance is large when suturing a wound, and the tissue to be sutured is damaged.

As a result, the disadvantage is that it takes time for the tissue to be sutured to heal.

In addition, as shown in FIG. 2, there was also a suture needle 1 in which a U-shaped groove was carved in the rear end of the suture needle 1, and the suture thread 2 was crimped after insertion to fix the thread.

However, like the one shown in FIG. 1, this also has the disadvantage that the passage resistance is large and the tissue is damaged because it has steps.

Furthermore, during surgery, these suture needles are used by being held with a needle holder, but the conventional suture needles shown in Figs. 1 and 2 have a structure with mounting holes and U-shaped grooves. There is a high possibility that the joints of threads that are weak may be grasped, and in extreme cases, the threads may come off.

In addition, with conventional suture needles, for example, when attaching a 6-0 thread, it is necessary to form a 0.15φ hole or a 0.15mm wide U groove, which requires extremely high processing technology and is difficult to process. Production costs were also high. There were also various problems in the caulking work for attaching the threads, requiring advanced technology and high manufacturing costs.

Therefore, the present invention has a structure that makes the joint part easier to see from the outside, eliminates steps in the thread joint part, makes it smooth, and can be manufactured at low cost.

Next, an embodiment of the present invention will be explained with reference to the attached drawings. As shown in FIGS. 3 and 4, the rear end of the suture needle 3 is processed by cutting, grinding, plastic working, etc. A protrusion-like attachment part 4 having a substantially conical cross section smaller than the diameter of the suture needle 3 and protruding in the needle length direction is provided integrally with the suture needle 3, and the attachment part 4 and the suture thread 2
is fixed with synthetic resin 5. The synthetic resin 5 is formed by injection molding (insert molding) polyamide resin (nylon) or the like.

That is, it is constructed by molding a synthetic resin material so as to include the attachment part 4 and the thread 2 in the center, and in the case of a large one, it can be done by insert molding, which is the same method used to manufacture a plastic handle driver. Generally, resin shrinks after molding, so it sticks to the inserted mounting part.

The synthetic resin 5 has the same diameter as the suture needle 3 at one end, and gradually reduces in diameter to have the same diameter as the suture thread 2 at the other end.

Even if the synthetic resin shrinks in diameter due to molding shrinkage, the degree of shrinkage is extremely small and can be considered to be the same diameter.

The threaded suture needle constructed as described above has no steps at the joint between the needle and the thread, so
It requires less resistance when passing through tissues, and
Since the tissue to be sutured is not damaged, healing after suturing is quick.

Furthermore, in the case of suturing fragile tissues such as aged blood vessels, there is no need to injure the tissue with steps unlike in the past, so blood will not leak from the wound.

Furthermore, since there is no step between the needle and the thread, even if the wrong part is pierced, the thread can be pulled back and sutured at the correct position again.

In particular, such as artificial valve installation surgery in the heart,
When a continuous spiral suture is required, the ability to pull the thread back and resew is of great benefit.

In addition, since the joint of the suture thread can be clearly identified from the outside, there is no risk of the suture thread being accidentally grasped with a grasper during surgery, and therefore the suture thread will not come off and the needle will not bend. do not have.

Furthermore, unlike conventional methods, micromachining is not required for drilling, so the manufacturing cost of the needle is extremely low. This is because when drilling holes, the holes are minute (for example, 0.15φ hole for 6-0 thread).
Even if various processing methods such as drilling, electrical discharge machining, and laser processing are attempted, the cost becomes extremely high.

Furthermore, even in the case of producing a U-groove, the tool used to form the U-groove is small and fragile, resulting in a very high cost.

On the other hand, since the suture needle of the present invention reduces the outer diameter of the needle, large tools, grindstones, etc. are required, and the work is easy and very inexpensive.

The conventional method of joining suture needles and threads by caulking metal and thread is a delicate process that requires skill, but this invention uses insert molding, a simple process that anyone can do. Therefore, it can be manufactured at low cost.

As a second embodiment of the present invention, the mounting portion 4 of the suture needle 3 may be provided with a large number of threads or meridian grooves.

With such a structure, the binding between the synthetic resin 5, the suture needle 3, and the suture thread 2 becomes strong, and the suture thread 2 will not fall off.

A third embodiment of the present invention is a case in which the synthetic resin at the joint is colored according to the thickness of the suture thread, such as red for 8/0, blue for 7/0, and yellow for 6/0. Alternatively, different colors may be used depending on the type of suture needle.

With such a configuration, it was conventionally difficult to determine the thickness of the suture and the type of suture needle after unwrapping the package, but with the present invention, it is easy to determine the thickness of the suture and the type of suture needle. can be determined.

In addition, as a fourth embodiment, a suture needle attachment portion 4
By controlling the shape of the needle and the material of the synthetic resin 5, the attachment force of the suture thread 2 can be adjusted.The tension during suturing will not allow the thread to come off, but if it is pulled with a strong force after suturing, the thread can be separated from the needle.

With such a configuration, the trouble of cutting the suture thread with scissors can be omitted, and the surgical time can be shortened. Therefore, suturing can be performed efficiently.

As another embodiment of the present invention, a highly adhesive synthetic resin is dissolved in a solvent such as phenol or cresol, a suture needle is attached to a mold made of Teflon, etc., and the suture thread 2 is adhered, and the solvent is evaporated. It may also be molded.

As described above, according to the suture needle of the present invention, passage resistance during surgery is small, and even if a stitch is made incorrectly, the thread can be pulled back and stitched again.

Furthermore, the suture needle can be manufactured at a very low cost and is economically superior.

[Brief explanation of the drawing]

1 and 2 are perspective views showing a conventional suturing needle with thread, FIG. 3 is a perspective view showing an embodiment of the present invention, and FIG. 4 is an enlarged sectional view of the main parts thereof. 1, 3... Suture needle, 2... Suture thread, 4... Attachment part, 5... Synthetic resin.

Claims (1)

[Scope of utility model registration request] A suture needle having a protruding attachment part having a smaller diameter than the suture needle and protruding in the needle length direction at the rear end of the suture needle by processing the rear end of the needle so as to be integrated with the needle body;
a suture thread provided in the needle length direction following the attachment part;
A synthetic resin that includes the needle-side end of the suture thread and the attachment part, has the same diameter as or smaller than the suture needle at the needle-side end, and decreases in diameter toward the thread-side end. A suture needle with a thread, characterized in that it is constructed by twisting.