When PA temperatures were compared
to axillary using gallium-in-glass (non-mercury), chemical
(reactive strip) and digital measures of axillary temperatures
in critically ill adults; the gallium-in-glass readings (in axilla
for 12 minutes) had the most accuracy with a mean difference
from core temperatures of 0.4 °C, ranging from -0.4 +
1.2 °C, compared to either the digital or chemical (reactive
strip) axillary measurements (Rubia-Rubia, Arias, Sierra, &
Aguirre-Jaime, 2011).