JPH0644548U - Surgical suture - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a surgical thread, in particular, a suture thread with a needle, which has a hardened portion at its thread end. In a structure of a surgical suture containing a core thread, which comprises a cover thread braided in a braided shape and a core thread housed in the cover thread, a certain length of the thread end is cured by heat, and the cover thread and the core thread are Is a surgical suture characterized by being fused and integrated, and since the cover thread and the core thread are fused and integrated, high hardness and waist, and fray of the thread end can be prevented, Easy to attach needles.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a surgical suture containing a core thread, which provides a novel surgical thread that can be easily attached with a needle.

[0002]

[Prior art]

 A needle-attached suture in which a needle and a suture are integrated in advance has been widely used as a surgical suture in a medical field or by a manufacturer. In order to facilitate the operation of inserting the needle into the needle hole, for example, Japanese Utility Model Publication No. 51-20237 and Japanese Patent Publication No. 58-340 disclose a yarn end hardening treatment with a resin, and JP-A-64-83266. Japanese Patent Publication No. 4-105646 discloses heat curing treatment.

[0003]

[Problems to be solved by the device]

 However, the method using a resin has the problems of cost, variation in the amount of adhesion, increase in diameter of the resin-adhered portion, and further difficulty in curing the resin to the core portion, resulting in insufficient curing. In the thermosetting method disclosed in JP-A-64-83266, the treatment temperature is not sufficient for curing the yarn, and further in the method disclosed in JP-A-4-105646. Since it is required to melt 50% or less of the filament, for example, in the case of a normal suture containing a core thread composed of 16 cover threads and 2 to 4 core threads, needle attachment work is required. Sufficient cure cannot be obtained.

[0004]

[Means for Solving the Problems]

 The present invention provides a novel surgical suture in which the above-mentioned conventional drawbacks have been improved, and a structure of a surgical suture containing a core thread, which comprises a cover thread braided in a braid and a core thread accommodated in the cover thread. In particular, it is characterized in that a certain length of the yarn end is hardened by heat, and the cover yarn and the core yarn are fused and integrated.

[0005]

[Action]

 This invention loses the flexibility of the core thread because the cover thread and the core thread are fused and integrated in the structure of the surgical suture containing the core thread, and the cover thread and the core thread are fused. Sufficient to wear, that is, the ratio of fusion yarn to the whole constituent yarn is high, so that it has the waist and hardness required for needle attachment, and the yarn end is always constant without fraying or disturbing. Since the core thread and the cover thread do not slide and move, it is extremely easy to perform needle attachment work in the medical field or to manufacture needle attachment sutures in advance by a manufacturer. is there. That is, the present invention has the above-mentioned characteristics because the ratio of the melted yarn to the entire constituent yarn exceeds 50%, and in some cases, the inside of the core yarn is melted and integrated.

The yarn constituting the present invention requires that at least one of the core yarn and the cover yarn, preferably both of them, is a synthetic fiber having a property of being plastically deformed by heat and melting. Specific examples include nylon, polyester and polypropylene, as well as biodegradable and absorbable materials such as polyglycolic acid, polylactic acid, and blends or copolymers thereof, polyparadioxanone, polycaprolactone and the like. . The production of a suture thread containing a core thread with such a thread is performed by inserting a core thread into a thread using a conventionally known string making machine according to a suture standard, and an example thereof is No. 3-0. In the suture thread, 16 pieces of 33-denier multifilament threads are used as a cover thread, and two 33-denier multifilament threads are inserted as core threads. Generally, in such a surgical suture containing a core thread, the ratio of the cover thread to the total fineness is in the range of 60 to 90%. For the suture of the present invention, for example, by using the method and apparatus disclosed in Japanese Patent Application No. 4-208263 invented by the present applicant, the conditions necessary for constructing the present invention can be set. Can be easily manufactured. In this case, if the heat treatment is performed while applying an appropriate tension, the heat-treated portion is thin and the cross section is likely to be a perfect circle, which is a more preferable shape for the needle attachment work.

[0007]

EXAMPLES Hereinafter, the configuration will be specifically described with reference to examples. Using 32 denier, 12 filament yarn obtained by spinning polyglycolic acid as a raw material, using 3 core yarns and 16 cover yarns, and using a 16-knit braiding machine manufactured by Kokubun Ltd. A suture was obtained. Using the apparatus disclosed in the above-mentioned Japanese Patent Application No. 4-208263, a specific portion is heat-treated at 230 ° C. for 4.0 seconds while a load of 50 g is applied, and after cooling, the heat-treated portion is cut and the main portion is cut. A device suture was obtained. The suture thread of the present invention obtained as described above is composed of a cover thread 1 braided in a tubular shape and a core thread 2 inserted therein as shown in FIG. It is composed of part 4. As shown in FIG. 2, the portion which is not heat-treated is in a free state where the core yarn 2 is not fused to the cover yarn 1 as shown in FIG. 2, and the heat-treated portion is the cover yarn 1 as shown in FIG. A part of the core yarn 2 is fused 5 and its diameter is thin, and it is a substantially perfect circle. Therefore, in this part, the cover yarn 1 does not slip between the core yarn 2 and a high proportion of the constituent yarns are fused by the heat treatment, so that it is sufficient for needle attachment. Since it has a high hardness and waist, and there is no fraying, it is extremely easy to attach a needle.

[0008]

[Effect of device]

 As described above, the present invention is a suture thread having a non-conventional end, and a needle-attached suture thread for integrating a needle and a suture thread by a needle attachment in a medical field or by swaging in advance can be obtained. Suitable for In addition, during the hardening treatment, for example, a heat treatment is performed to such an extent that the strength of the whole or a part thereof is remarkably lowered, so that it is required to be separated from the needle during the operation, and it has the same function as a control release needle. It is also possible.

[Brief description of drawings]

FIG. 1 is a side view illustrating the configuration of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

3 is a cross-sectional view taken along the line BB in FIG.

[Explanation of symbols]

 1 Cover Yarn 2 Core Yarn 3 Non-heat-treated part 4 Heat-treated part 5 Heat-fused part

Claims (1)

[Scope of utility model registration request] 1. A structure of a surgical suture containing a core thread, which comprises a cover thread braided in a braid and a core thread housed in the cover thread, wherein a fixed length of the thread end is hardened by heat, and the cover thread and A surgical suture in which a core yarn is fused and integrated.