Fig. 1
From: Measurement of tissue oxygen saturation during arthroscopic surgery of knee with a tourniquet
Modified from George et al. [14]
Example case of how the probe was placed and secured. (1) A probe placed distal to the tourniquet. (2) Probe secured using adhesive tape to ensure contact with skin. (3) Sterile drapes placed distal to the probe to ensure a sterile operating field. (The proximal part of the limb is at the top of the images, and the distal leg and knee are at the bottom.)