Figure 1.

Flowchart of subject enrollment. *Data archiving failures involved the archiving system (ruggedized GoBook personal computer connected to the CareGuide SmO₂ sensor) that we assembled for this investigation. For the final 16 months of the investigation, we reinforced the electronic and mechanical connectivity, and had only one additional subject with data archiving failure in that time interval. BMI = body mass index; BP = blood pressure; HR = heart rate; IRB = institutional review board; NIRS = near‐infrared spectrometry.