Vasopressin; Arginine Vasopressin
14 days
ADH: radioimmunoassay (RIA), osmolality: freezing point depression
Test Includes:
ADH, osmolality
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Comprehensive panel evaluating ADH levels along with serum and urine osmolality. Used in diagnosing SIADH or diabetes insipidus.
Serum and Plasma
1 mL serum and 2 mL plasma
Gel-barrier tube and lavender-top (EDTA) tube
No isotopes administered 24 hours prior to venipuncture. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Draw serum and plasma samples and separate from cells using a refrigerated centrifuge. Transfer separated samples into clearly labeled “plasma” and “serum” plastic transport tubes. Freeze plasma immediately and refrigerate serum. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
| Temperature | Period |
|---|---|
| Room temperature | ADH: unstable Osmolality: 14 days |
| Refrigerated | ADH: unstable Osmolality: 14 days |
| Frozen | ADH: 4 weeks Osmolality: 14 days |
| ADH: 4 weeks Osmolality: 14 days | ADH: Not applicable Osmolality: Stable x3 |