Extracorporial Knots in Laparoscopic Surgery: Which, When, and How

This is the authors' abstract. We don't add key points for this paper.

Despite recent advances in both suture welding and knotless anchor technology, knot tying will remain a necessary skill which the surgeon must master when performing sutureanchor in laparoscopic surgery. There are an endless number of combinations of knots (sliding versus static, simple versus complex, etc.) and suture types (monofilament versusbraided) to accomplish this task. Surgeons are familiar with knotting but seem not to be aware of the possibilities and impact of the techniques of capsizing, flipping, and flypingknots. (1) Capsizing refers to changing or perverting a flat knot’s geometry under asymmetric stress. The simplest examples of this is the change of the overhand knot into ahalf-hitch by putting more tension on its one end than on the other (Fig. 1A). (2,3,4) Flipping the knot means to interchange the standing part and working end of the suture, therebyrelocating the knot from one end of the suture to the other.(5) The half-hitch can be flipped easily between both ends of a suture (Fig. 1B).Flyping (that rhymes with “typing”) is an archaic Scottish word that was used to describe the peeling off of a very wet glove of the hand, thereby changes its configuration from a righthand glove to a left-hand one. (6,7,8). The Scottish physicist Peter GuthrieTait (1831- 1901) introduced flyping as a knotting term, in the late-19th century, to define this “turningoutside in” deformation process of the geometry of knots. (9) An illustrative example of flyping is the change of a series of turns of the working end around the standing part, intothe proper blood knot geometry by drawing the proximal turns over the distal ones (Fig. 1C).

May standardize laparoscopic knot terminology; leaves open prospective validation of safety and efficacy.