The incorporation of technological improvements from the physical into the biological sciences has led to rapid advances in medicine. One such accomplishment was the introduction of stainless steel wire as a suture material. This material affords greater strength than the organic sutures and also has the advantage of eliciting a lesser foreign-body reaction. However, there are problems accompanying the use of wire sutures, such as breaking at the knot and difficulty of tying, due to the rigidity of the metal. To resolve these problems and at the same time improve the use of wire sutures, the authors have investigated another engineering technique, wire welding.
The project to develop welded wire sutures began six years ago with bench tests to determine and confirm the parameters controlling welded sutures. The parameters investigated included wire composition, size, and tension; weld current pulse; electrode contact pressure; and effect of body fluid. The most sensitive