腹腔鏡下外科縫合における結節のための融接鉗子の開発

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Suturing using needle and thread is one of the basic operations in surgical operations. Suture knot making is very difficult in a distance equal to that of the surgeon's working space, such as during laparoscopic surgery. To cope with this difficulty, several methods have been proposed, however they are not suitable for replacing the present suturing work done using needle and thread. This research proposes a new method where the threads are closed together at first and then a heating device is used to melt and weld the ends of the threads together. This knot-making method is named the "weld method. "This report explains part of process for developing a surgical instrument that can make knots by means of the weld method during laparoscopic surgery. The author developed a prototype instrument that has a thread-knotting function, a forceps function and a thread cutting function within the 5 mm shaft diameter of the instrument. The thread diameter applied was about 0.2 mm. Thread shrinking length due to heating was about 5 mm. Heating conditions were researched to determine the sufficient tensile strength of the knot without scorching considering the limited space on the tip of 5 mm instrument shaft. It was shown that the tensile strength of welded knot has a practical value in the case of using thread with a diameter of about 0.2 mm, and that the welding method can be applied not only to nylon thread, but also to absorbable synthetic thread.
社団法人日本生体医工学会の論文
2004-09-10

腹腔鏡下外科縫合における結節のための融接鉗子の開発

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