A method for electrosurgically sealing a tissue includes steps of: (A) applying an initial pulse of RF energy to the tissue, the pulse having characteristics selected so as not to appreciably heat the tissue; (B) measuring a value of an impedance of the tissue in response to the applied pulse; (C) in...http://www.google.se/patents/US6398779?utm_source=gb-gplus-sharePatent US6398779 - Vessel sealing system
