Near Infrared Spectroscopy (St02)

"The InSpectra StO2 Tissue Oxygenation Monitor (model 650; Hutchinson Technology, Hutchinson, MN, USA) with probes spaced at 15 mm will be utilized to obtain StO2 measurements.~Following a minimum initial five-minute stabilization period, the initial StO2 will be measurement and then a Vasoocclusive Testing Procedure (VOT) will be performed using an automated tourniquet (Delfi Tourniquet System; Delfi Medical Innovations, Inc, Vancouver, BC, Canada), insufflated to 50 mmHg over the patient's SBP for a period of three minutes."