Preoperative laboratory findings were obtained. Mean blood pressure (MBP), pulse oxygen saturation (SpO2), heart rate (HR), skin temperature, and VOT-derived measurements, including baseline tissue oxygen saturation (StO2), occlusion slope, minimum StO2, time to minimum StO2, recovery slope, maximum StO2, and time to baseline StO2 were recorded before (T0) and 30 min after general anesthesia (T1).
The purpose of this study was to investigate the effect of obesity on changes in microvascular reactivity and tissue oxygen saturation (StO2) during general anesthesia using near-infrared spectroscopy in conjunction with vascular occlusion tests (VOT).~For this retrospective investigation, the medical records of 71 patients who underwent elective surgery under general anesthesia and dynamic near-infrared spectroscopy between 2018 and 2021 were reviewed. Baseline StO2 on thenar eminence, hemodynamics, and laboratory profile were monitored before (T0) and 30 min after general anesthesia (T1). During VOT, the occlusion slope representing oxygen consumption of muscle and recovery slope representing microvascular reactivity were also collected at T0 and T1. For analysis, the patients were divided into two groups: overweight (body mass index [BMI] ≥ 25 kg/m2) and normal weight (BMI < 25).