Motion testing
desaturation
In the motion group, each subject had two control blood samples taken at the beginning of each experiment, while breathing room air. For each subject, desaturation was repeated six times to reach a low SpOMotion was induced palm down using a clenching technique, pressing and rubbing motion (CPR), palm up with twitching/clenching (T/C), and a tapping motion (Tap). Motion conditions were generated by the test subjects with variable intensity and frequency. Oximeters were recorded continuously to collect SpOArterial blood was sampled (in total N = 248 GE, N = 250 Nellcor and Masimo) at each saturation plateau to obtain SaO