Test Name
OSMOLALITY, SERUM
Aliases
-
Abbreviations
-
Test Classification
INDIVIDUAL
Department
ROUTINE CHEMISTRY
Sub Department
-
TAT Category
ELAPSED (CONTINUOUS) TIME
Estimated TAT
7
TAT Units
DAYS
Test Requirements
3ml serum in serum separator tube (SST/ Gel) or plain (red top) vacutainer.
SHIPPING/ TRANSPORTATION REQUIREMENTS
Shipping Temperature: Refrigerated
ANALYTE STABILITY
Room Temperature: 3 hours at 20-25°C │ Refrigerated: 1 DAY at 2-8°C │ Frozen: 3 months at -20°C
Clinical Utility
Evaluating patients with hyponatremia or suspected diabetes insipidus, SIADH, water intoxication, methanol ingestion, ethylene glycol ingestion etc. This test is NOT synonymous with serum osmolarity.
Last Review
26th Feb 2026