Description

The first laparoscopic sliding knot to be described was the Roeder knot; it has been used for a variety of procedures in all surgical disciplines. It was surmised that the introduction of new modifications in the geometry of the knot paralleled the introduction of its new indications, and that not all modifications improved its security of roeder's knot but still it is most popular extracorporeal knot in laparoscopic surgery. The lack of direct manual contact, for which palpation with current laparoscopic instruments cannot completely compensate is atracting surgeon to use extracorporeal knot in laparoscopic surgery. Roeder's knot is one of the oldest extracorporeal knot which was first time used for appendectomy. The limited movement of laparoscopic instruments that are inserted through a cannula anchored to the abdominal wall. The working field is a cone with a fixed point at the insertion point of the cannula. Because of the limited field of movement of laparoscopic instruments, proper placement of the cannula is critical to tie an entracorporeal knot. In these situation extracorporeal roaders knot is a good alternative.. The lack of normal binocular vision without true depth perception, which makes conventional techniques difficult to apply make these knots easier. Roeder's knot can be safely used to ligate any tubular structure upto 6-8mm in diameter.