Anastomotic leakage is the main, yet unsolved reason for mortality in abdominal surgery. Every year patients die because of anastomotic leakage after surgery. In the case of colorectal surgery, statistics show an incidence rate of 10–13% and a mortality rate of 32%. The aim of this work is to reduce the complications by improving the feedback to the surgeon during the operation and to minimise the fatalities by developing an early warning system. Currently, there are no peroperative methods to avoid anastomotic leakage or any validated early postoperative parameters for leakage detection. Therefore, an objective aid to detect leakage during surgery and recovery is of utmost importance.

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