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Test Code OSMO Osmolality, Plasma

Specimen Type

Blood

Container

Mint green top with gel separator

Preferred Volume

4 mL

Availability

24/7

Turnaround Time

3 hours

STAT Availability

Available

Test Usage

Useful in evaluating hypernatremia and to screen for ingestion of alcohols and glycols.

Test Methodology

Freezing point depression osmometry

CPT Code

83930

Test Includes

quantitative determination of osmolality in plasma

STAT Turnaround Time

1 hour

Reference Range

289 – 308 mOsm/Kg

Critical Results

None

Minimum Volume

2 mL

Fee Code

43296