3 - 4 days
ARGININE VASOPRESSIN, PLASMA
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The investigation of the differential diagnosis of patients with water balance disorders, including diabetes insipidus in conjunction with osmolality and hydration status
Non-water deprived, non-fasting adults: <13.1 pmol/L
Water deprived, fasting adults: <15.2 pmol/L
Non-water deprived, non-fasting pediatric patients: <14.5 pmol/L
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect blood in a lavender top tube. A separate sample must be sent for this assay when multiple tests are ordered.
Instruct patient to fast and thirst for 8 hours prior to specimen collection (no food or liquids, including water). Collect specimen in a lavender top tube. Centrifuge and aliquot plasma into a screw capped, plastic tube. Freeze.