The clip applier of the current invention solves the problems of prior art tools by incorporating a pre-clamp mechanism, the function of which is to pre-clamp the vessel to be ligated to a dimension such that the center leg of the spring of the ligation clip need be lifted only slightly. In this manner...http://www.google.es/patents/US6607540?utm_source=gb-gplus-sharePatente US6607540 - Pre-clamping method
