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Osmolar Gap

Alternative Names/Synonyms	N/A
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Blood
Test Code	OSMGP, OSGPC

Identifying the presence of toxic alcohol.

Osmolar Gap is calculated via:
Measured Osmolality - (2 x Sodium) - Urea - Glucose

Serum, Plasma

0.5 mL

Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types

Calculated

24 hours a day, 7 days a week

1 hour

3 hours

None

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