JPH0741041B2 - Suture needle with thread and manufacturing method thereof - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threaded suture needle used in medical surgery and a method for manufacturing the same.

2. Description of the Related Art There are roughly two types of known medical suturing needles. That is, (1) as disclosed in Japanese Utility Model Publication No. 46-12549, an eyed type in which a thread hole is provided at the base of a suture needle and a suture thread is inserted into the thread hole during use; ) As disclosed in Japanese Examined Patent Publication (Kokoku) No. 59-15648, a prepared hole smaller than the diameter of the thread to be connected is provided at the connecting end of the suture needle, and the prepared hole is approximately equal to or larger than the thread diameter. This is an eyeless type in which the thread is integrally molded with the suture needle by expanding and molding the thread into the docking hole, and inserting the end of the thread into the docking hole and caulking the docking end.

Problems to be Solved by the Invention In the first eyed type, not only is it necessary to pass the thread through the thread hole of the suture needle each time it is used for surgery, but also the thread folded through the thread hole The portion is apt to be larger than the thickness of the suture needle, and the suture needle becomes one of the causes of breaking due to the increased resistance received from the tissue of the body during the operation.
Further, when the suture needle is broken due to various causes, it takes time to take out a part of the suture needle left in the tissue, and thus the time required for the operation becomes long and the operation may be unsuccessful. In order to eliminate this inconvenience,
As disclosed in Japanese Patent No. 841 publication, a structure in which a flexible metal wire made of soft iron or nickel is brought into close contact with the inner hole of a steel tube forming a suture needle has been considered, but in this case, the suture needle is used. Since the flexible metal wire must be brought into close contact with the inner hole of the, the manufacturing process is extremely troublesome.

In the second eyeless type, a prepared hole smaller than the diameter of the thread must be drilled at the connecting end of the thin solid round bar, but this requires a skilled person having considerable skill. However, when a thread attachment hole is formed by using a laser device, it costs a lot to purchase the device, and a special technique is required for using the device, so that the cost required to make a suture needle is high.

Moreover, when the suture needle is broken, the same inconvenience as that described for the eyed type occurs. This inconvenience can be solved by forming a groove portion over substantially the entire length of the needle body and fixing the suture thread to the entire length of this groove portion, as disclosed in JP-A-61-103438.
The following inconveniences newly occur. That is, since scratches due to the groove remain on almost the entire length of the formed suture needle with thread, the JIS requirement that the needle surface is not scratched is not satisfied. Also, with such a suture needle made using a plate material, the cutting edge and the cutting edge are not sufficiently polished and the cutting edge becomes poor.In this respect also, the requirements of JIS are not satisfied, and the suture needle is practical. It becomes unsuitable. Moreover, the heat treatment damages the suture thread fixed to the suture needle, so that the hardness and strength of the suture needle cannot be increased by the heat treatment.

Means for Solving the Problems The present invention has been made to solve the above problems, in which a suture needle main body is provided with a small-diameter hollow hole over the entire length direction, and a metal or metal insertable into the hollow hole is used. One end of the non-metallic flexible intercalating thread material is fixed to the tip side of the needle body, curved into a predetermined shape, and heat-treated at low temperature as necessary. A suture thread mounting hole is provided, and the suture thread inserted into the suturing hole is integrally coupled with the insertion thread material and is held by the peripheral wall portion of the mounting hole. A suture needle and its manufacturing method.

Action In the suture needle with thread of the present invention, the flexible intercalating thread material inserted into the hollow of the suture needle body has one end fixed to the distal end side of the needle body and the other end in the attachment hole of the suture needle body. Since it is integrally connected to the suture to be inserted, even if the suture needle is broken, the interlocking thread material can connect the pieces of the broken suture needle together and take them out of the tissue. To do. Further, since it is not necessary for the inserted thread material to be closely attached to the hollow hole of the suture needle main body, it is easy to mount the inserted thread material. In addition, since the inserted thread material and the suture thread are formed by different members, the strength of the suture needle can be maintained by reducing the thickness of the inserted thread material to reduce the size of the hollow hole.

Embodiments FIGS. 1 and 2 show a first embodiment of the present invention,
The suture needle 1 shows a case where the needle body has the most general shape in which it is curved in an arc shape. The suture needle 1 is made by using a hollow tube made of stainless steel, titanium or the like, but a hollow tube made of other non-corrosive material can also be used. One end of a metallic or non-metallic flexible insertion thread member 4 inserted into the hollow hole 3 of the suture needle 1 is fixed to the needle tip portion 2 whose one end is closed by swaging. Also, the suture needle 1
The suture thread 6 is inserted into the attachment hole 5 larger than the hollow hole 3 formed at the rear end of the needle body (Fig. 2). The suture thread 6 is inserted into the hollow hole 3 by using the interlocking thread material 4
After being bonded together using adhesive and adhesive 7,
Any one or both of the adhesive 7 and the caulking action are held together and held on the peripheral wall portion 8 provided with.

The cross-sectional shape of the suture needle 1 is, when the tissue of the target portion to be sutured is hard, for example, approximately 1/3 from the needle tip portion 2 is triangular, approximately 1/3 of the intermediate portion is circular, and the remaining portion is About 1/3 of the needle base side 9 is formed in an elliptical shape, and the tip of the needle tip portion 2 is usually formed with a predetermined tip angle θ, and
A cutting edge is formed on the triangular portion. But,
When the target tissue to be sutured is soft, the suture needle 1
Since the round cross section is more suitable than the square cross section, a portion having a triangular cross section of about 1/3 from the needle tip 2 is transformed into a circular cross section.

The suture needle with thread 1 having the above structure is usually produced by the following procedure (see FIGS. 3 to 8).

(1) A hollow tube 1a made of stainless steel or the like selected according to the thickness of the needle is cut into a required length, and a chamfer 3a is formed at one end (rear end) of the hollow hole 3.

(2) Swaging is applied to the tip of the hollow tube 1a to temporarily close the hollow hole 3, and a protrusion 1b having a length of about 0.5 mm is formed at the tip. In this case, when it is necessary to prevent the lubricating oil during swaging from entering the hollow hole 3, for example, the processing may be performed while supplying compressed air from the rear end of the hollow tube 1a.

(3) By inserting the flexible interlocking thread member 4 of a specified length to the tip into the hollow hole 3 whose one end is temporarily closed, and drawing or swaging the tip, the interpolated thread member 4 is inserted. Is fixed to the tip of the hollow tube 1a.

(4) The tip portion of the hollow tube 1a is pressed to completely close the portion of the hollow hole 3 that was temporarily closed, and in the case of a round needle, a tip shape is formed at the tip portion. In case of square needle, hollow tube
Triangular press processing is performed about 1/3 from the tip of 1a.

(5) After polishing the round needle and the square needle formed in the previous section to form the cutting edge 1c, the rear end of the hollow tube 1a is cut as necessary.

(6) The hollow tube 1a on which the cutting edge 1c is formed is pressed to give the hollow tube 1a a shape of semi-circular bending or 3/8 circular bending to obtain the suture needle 1. The suture needle 1 press-bent into a predetermined shape is subjected to low-temperature heat treatment at 450 ° C for about 30 minutes to obtain a hardness of Hv4.
Increase from 80 to 500.

(7) Hollow hole 3 at the rear end of suture needle 1 that has been subjected to low temperature heat treatment
The inlet portion is closed with an adhesive to prevent the electrolytic solution from entering the hollow holes 3, and electrolytic polishing and cleaning are performed to finish the surface of the suture needle 1 cleanly. Electrolytic polishing may be replaced with chemical polishing, and ultrasonic cleaning or CFC cleaning is used for cleaning.

(8) At the rear end of the suture needle 1, a mounting hole 5 having a depth of about 4 to 6 mm is formed by expanding the hole diameter of the hollow hole 3, and a suture thread 6 is inserted into the mounting hole 5 for flexible insertion. The end face of the thread member 4 and the end face portion of the thread member 4 are integrally joined by the butt adhesive 7 (FIG. 8). The connection between the interlocking thread member 4 and the suture thread 6 is not limited to the above-mentioned butt connection, but as shown in FIG. 4 may be polymerized and bonded together by an adhesive 7. In this case, the 7th
The mounting hole 5 formed at the stage of the drawing is formed at the stage immediately after cutting the hollow tube 1a to a required length (FIG. 3).

(9) The suture thread 6 in the mounting hole 5 (in the case of the lap joint shown in FIG. 9), the suture thread 6 and the intercalated thread material 4 are caulked on the peripheral wall portion 8 of the mounting hole 5 or The adhesive 7 is also used to hold it in the mounting hole 5 to form a suture needle with thread (second
(See FIG. 9).

The above-mentioned procedure for manufacturing the suture needle is applied to a material such as SUS301 whose Hv hardness is lower than the required hardness, but which can be made higher than the required hardness by the low temperature heat treatment. In the case where the suture needle 1 is made of a material such as silicoloy having a hardness higher than the required hardness and a little elongation, a low temperature heat treatment after press bending and a rear end hole closing are included in the manufacturing procedure. , And electrolytic polishing are unnecessary.

Since the one in this embodiment is configured as described above,
Even if the suture needle 1 is broken during the operation, the broken suture needle 1 is out of the tissue because the needle tip portion 2 and the needle base side 9 are connected by the flexible insertion thread member 4. Needle tip 2 or suture 6
Just pull on the broken needle side 9 that remains in the tissue.
Alternatively, the needle tip portion 2 can be easily taken out of the tissue.

Further, since the suture thread 6 is held without being folded back in the mounting hole 5 in which the hollow hole 3 of the hollow tube 1a is enlarged, not only the mounting hole 5 is very easily formed, but also the suture needle during the operation. It is possible to eliminate an extra resistance applied to 1.

In addition, the suture needle 1 is made of the hollow tube 1a, and since the interpolated thread member 4 whose one end is fixed to the needle tip portion 2 is smaller than the hollow hole 3, the insertion of the interpolated thread material 4 is facilitated. Not only that, but also the cutting edge and the cutting blade can be easily polished, so that a clean suture needle 1 with no surface scratches can be provided at low cost. Moreover, since the inner thread material 4 and the suture thread 6 are integrally connected at the final stage, the suture needle 1 before the suture thread 6 is connected can be subjected to heat treatment, so that the suture needle 1 has a high hardness and strength. And the suture thread 6 can be prevented from being soiled.

FIG. 10 shows another embodiment of the present invention, in which a circular thread cutting blade 11 is formed at the edge of the peripheral wall portion 8 at the rear end of the needle body in each of the above embodiments. The thread cutting blade 11 is not limited to the case of this embodiment, and the edge of the peripheral wall portion 8 of the mounting hole 5 may be cut obliquely to form an elliptical thread cutting blade 12 as shown in FIG. Alternatively, the circular edge of the peripheral wall portion 8 of the mounting hole 5 may be formed in a V shape.

When such thread cutting blades 11 and 12 are formed on the peripheral wall portion 8 of the attachment hole 5, the suture needle 1 is pulled in a direction perpendicular to the suture thread 6 while the suture thread 6 is pulled during or after the suturing operation. When facing, the suture thread 6 is cut by the thread cutting blades 11 and 12,
Easily separated. The suture thread 6 may be cut by pressing the suture thread 6 in a direction perpendicular to the thread cutting blades 11 and 12.

EFFECTS OF THE INVENTION The present invention forms a suture needle with a hollow tube, and fixes one end of a flexible insertion thread member inserted in a hollow hole with a needle tip portion to polish a cutting edge and a cutting edge, The suture thread is inserted into an attachment hole larger than the hollow hole of the suture needle curved into a shape, and this suture thread is connected to an intercalating thread material and held by the peripheral wall portion of the attachment hole. Excellent effect can be obtained.

That is, in the suture needle with a thread and the method for manufacturing the same according to the present application, (1) since the front end portion and the rear end portion of the suture needle are connected by the intercalation thread material, even when the suture needle is broken, By pulling the needle tip portion or the suture thread, the cut piece of the broken suture needle remaining in the body can be easily taken out of the body.

(2) Since the suture needle is made of a hollow tube, the attachment hole for attaching the suture thread only needs to be expanded in size, so the attachment hole should be extremely easy and inexpensive to form. You can

(3) Unlike the conventional suture needle with a thread, the suture needle formed by the hollow tube does not have a scratch on the surface,
Since the cutting blade can be easily polished, it is possible to provide a suture needle that has good appearance and sharp cutting edges.

(4) Since the insertion thread material and the suture thread are integrally connected at the final stage, the needle body can be processed at a stage where the insertion thread material is still fixed and the hardness is still low. By performing heat treatment after completion, the hardness and strength of the suture needle can be improved. Further, since the suture thread is held by the suture needle at the final stage, unlike the case of the conventional threaded suture needle in which the suture thread is mounted in the needle body, the suture thread is reliably prevented from being soiled.

[Brief description of drawings]

FIG. 1 is a partial sectional front view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part of the same, and FIGS. 3 to 8 are drawings showing an example of a manufacturing procedure of the present invention. 3 and 4 are front views, FIGS. 5 and 6 are partially sectional front views, FIGS. 7 and 8 are enlarged cross-sectional views of essential parts, and FIG. 9 is another embodiment. An enlarged cross-sectional view of an essential part of an example, and FIGS. 10 and 11 are perspective views of an essential part of other different embodiments. 1 ... Suture needle, 2 ... Tip side of needle body (needle tip), 3 ...
... Hollow hole, 4 ... Flexible insertion thread, 5 ... Mounting hole, 6
...... Suture, 7 …… Adhesive, 8 …… Peripheral wall, 9 …… Needle side, 11, 12 …… Thread cutting blade

Claims (6)

[Claims] 1. A suture needle main body is provided with a small-diameter hollow hole over the entire length thereof, and a metallic or non-metallic flexible intercalating thread material to be inserted into the hollow hole has one end of the needle main body. The needle body fixed to the side and curved to a predetermined shape has a suture attachment hole larger than the hole diameter of the hollow hole at the rear end side, and the suture needle inserted into the attachment hole is integrated with the inner thread material. A suture needle with a thread, characterized in that the suture needle is connected to the thread and is held by the peripheral wall portion of the mounting hole. 2. The suture needle with a thread according to claim 1, wherein the suture needle is joined to the flexible insertion thread material by an adhesive agent by butting or overlapping. 3. The suture needle with thread according to claim 1, wherein the suture needle body is heat-treated at a low temperature when it is made of a material having a low hardness such as SUS301. 4. The suture needle with thread according to claim 1, wherein the suture needle body is not subjected to low temperature heat treatment when it is made of a material having a high hardness such as silicoloy. 5. The suture needle with a thread according to any one of claims 1 to 4, wherein a thread cutting blade is formed on an edge of a peripheral wall portion of the attachment hole. 6. A hollow hole in a needle body curved into a predetermined shape by fixing one end of a flexible insertion thread material to the tip of the thread body formed by a hollow tube to form a cutting edge portion. A method for producing a suture needle with a thread, characterized in that a suture thread is inserted into a large attachment hole, the suture thread is connected to an insertion thread material by an adhesive, and the suture thread is held on the inner surface of the attachment hole.