Test BackgroundThe peptide ADH (arginine vasopressin) is secreted by the hypothalamus in response to increased osmolality of the extracellular fluid compartment and in the intracellular space. The primary function of ADH is to increase the permeability of the collecting duct in the nephron, thereby allowing reabsorbtion and subsequent retention of water down an osmotic gradient and resulting in urine concentration.
Sample Required Heparin (green top) on ice rush to laboratory
Sample Volume 0.5 mL
Turnaround Time Up to 6 weeks
NotesNot currently performed in house; this is a referred test.