- Test Name
- Antidiuretic Hormone
- Aliases
- ADH
- Provincial Mnemonic
- ADIHPL
- LOINC Test Code
- 14949-2
- Description and Primary Use
- Measurement of plasma ADH is not usually helpful for investigation of disorders of serum sodium concentration. Interpretation of plasma ADH levels requires knowledge of plasma osmolality and clinical context. Plasma ADH levels may have a role in the investigation of diabetes insipidus as part of a controlled water deprivation test. ADH promotes the reabsorption of water by the kidneys and is used to assist in diagnosing ADH deficiency (e.g. diabetes insipidus) or excess (e.g. syndrome of inappropriate ADH, (SIADH)).
- Reorder interval
- N/A
- TAT
- 28 Days
- Test Cost
- $70.00
- Tier
- 2 - Conditional/Restricted Access (See Ordering Requirements)
- Ordering Requirements (Restrictions / Conditions)
Approval requires test order:
- By endocrinologist
- By Internal Medicine; or
- Completed LTSA Form.
Enter test name (and/or Provincial Mnemonic) into Test(s) to be performed section on the LTSA Form. Direct questions on how to order test to Specimen Dispatch (709-777-2373).
- Required Consultations
- N/A
- Algorithms and Guidelines
N/A
- Special Patient Preparation
To obtain basal levels, patient should fast for 12 hours and abstain from drinking fluids, including water, for 6 hours prior to testing (preferred). Testing should not be completed on patients who have recently received radioisotopes because of potential assay interference.
- Special Collection / Transport / Processing Requirements
Specimen for this test must be collected, processed, aliquoted and frozen within 30 minutes of collection. Collect specimen in a pre-chilled EDTA tube and place immediately on ice. Pre-chill specimen for 10 minutes. Centrifuge. Aliquot plasma to a transport tube and freeze.
- Criteria for Rejection
Grossly hemolyzed; not maintained frozen.
- Laboratory Service Area
- Clinical Chemistry
- Performing Laboratory / Site
- Referred out of province
- Last Updated
- 06-Nov-19