Delayed tissue death probed with sunlight surgery Conference Paper uri icon


  • We report pronounced delayed tissue death in photothermal surgery performed with highly concentrated sunlight on the livers of healthy live rats. Pathology reveals that lesion volumes increase by up to a factor of 5 within approximately 24 h after surgery, and then stabilize. Islands of viable cells can persist within damaged tissue, in the immediate vicinity of blood vessels, but also necrose within about 48 h. Delayed cell death is an unambiguously non- thermal process, apparently linked solely to biochemical messengers. The dramatic enlargement of the affected region appears to have been essentially overlooked in laser surgery studies. The ramifications include (a) proper gauging of the required scale of tissue damage during surgery, toward averting excessive destruction of untargeted surrounding tissue; and (b) avoiding false positives from the substantial amount of tissue that appears …

publication date

  • April 15, 2005