Comparison of Rates of Anastomotic Leak in Patients Undergoing Colo-rectal Surgery When Bowel Perfusion and Resection Margin is Deterimined by Intra-operative Infra-red Thermography or by Conventional Method

. In the test group after devascularisation of the bowel segment surgeon marked the resection line using their conventional method, then IRT was used to determine the resection line using infra- red camera in rainbow display mode. Resection line was determined by abrupt colour change (corresponds to decrease in temperature \>3 degree Celsius) over the visualised bowel wall. Margins were revised if difference between surgeon and IRT determined resection lines were more than 1cm apart.