Measurements of lower extremity temperature were performed
on the seated patient in a constant room temperature
environment on the dorsal and plantar surfaces of both feet
with an infrared surface temperature scanner (Omega Medical,
Clearwater, FL). The manufacturer states that the instrument
is accurate to ± 0.1C, which we confirmed in 200
subjects with repeated readings at the same site that were
nearly identical. These skin temperatures were obtained
immediately after the patient had walked 100 ft in a corridor
adjacent to the neurovascular testing room. We attempted to
maintain a constant room temperature during the testing.