Anterolateral Tigh (ALT) Flaps Oxygenation Monitoring by NIRS

Flap failure will be identified, based upon gold standard monitoring (flaps skin color, temperature, tissue turgor and capillary refill time) along with Doppler technique during a postoperative period of five days. In all patients Near Infrared Spectroscopy (NIRS) by FORE-SIGHT ELITE will be applied to obtain continuous tissue oxygenation measurements. NIRS values and trends from patients with flap failure (case group) will be compared to NIRS values and trends from patients with no flap failure(control group).