fluid volume, deficient

fluid volume, deficient [hyper/hypotonic]

Decreased intravascular, interstitial, and/or intracellular fluid. This refers to dehydration with changes in sodium.

fluid volume, deficient [isotonic]

Decreased intravascular, interstitial and/or intracellular fluid. This refers to dehydration, water loss alone without change in sodium.
Medical Dictionary, © 2009 Farlex and Partners