2 Case Reports in Medicine II III I IV Figure 1: Operative situs after second-look laparotomy. The proximal segment of the jejunum (80 cm) is slightly congested but appears to be vital (I); the congested distal segment of the jejunum and the ileum have a highly questionable viability (II and III). The transverse colon (IV) has a normal appearance. The resection of the whole bowel with questionable viability would probably lead to short bowel syndrome. Figure 2: Mean values (10 sec) of laser Doppler ﬂowmetry (microvascular ﬂow and erythrocyte velocity) and spectroscopy (microvascular haemoglobin oxygenation SO2 and microvascular haemoglobin concentration rHB) of the proximal segment of the jejunum (I), of the distal segment of the jejunum and the ileum (II and III), and of the transverse colon (IV). The mean values measured at the chosen cut margin are just in range of the critical threshold values. The resected segment of bowel (III) shows a microvascular ﬂow value below the critical threshold value of 10 AU and a microvascular haemoglobin concentration rHB almost at the critical threshold value of 90 AU.