Abstract
Background: We evaluated the technical feasibility and stability of measurements using visible light spectroscopy to measure microvascular oxygen saturation (StO<sub>2</sub>) in gastrointestinal anastomoses. Methods: In consecutive esophageal (n = 14) or colorectal (n = 30) resections, during which an uncomplicated anastomosis was performed, measurements of serosal StO<sub>2</sub> were performed during the procedure. Results: In esophageal resections, median (± standard error) StO<sub>2</sub> was stable before and after anastomosis in the proximal esophagus (before: 66.0 ± 4.6, after: 68.3 ± 6.0%) and the gastric conduit (before: 70.6 ± 8.6, after: 69.8 ± 8.0%). Mean colorectal StO<sub>2</sub> before and after anastomosis increased in the proximal part (71.3 ± 8.4 to 76.6 ± 8.2%; p < 0.005). Mean StO<sub>2</sub> in the distal part remained stable (72.4 ± 6.6 to 74.8 ± 6.7%). Conclusions: Visible light spectroscopy is a feasible and fast method for intraoperative assessment of microperfusion of the serosa in esophageal and colorectal anastomosis. Future clinical studies will define its role in the prediction of anastomotic leakage.
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