McGee S, et al. Is this patient hypovolemic? JAMA. 1999;281(11):1022-29.
Systematic review & meta-analysis for studies of physical exam findings in the diagnosis of hypovolemia.
Table 5 addresses diagnostic accuracy of findings for hypovolemia not due to blood loss, including various findings of the axilla, mucous membranes, tongue, eyes and capillary refill time.