Laboratory Services

Osmolality

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Updated Test Information:

Test Description
Osmolality
Synonym(s)

UOW463

Test ID
OSMO
Container Type

4 mL blood in GOLD SST tube
Also Acceptable: 4 mL blood in ORANGE RST, LIME GREEN PST, RED TOP or GREEN TOP tube

Specimen Type

Serum

Specimen Requirements

1 mL serum/plasma

Specimen Collection / Processing Instructions

Refrigerate serum/plasma.

Minimum Sample Volume

0.3 mL serum

Stability

 Refrigerated: 24 hours. Freeze for longer storage.

Department (code)

Chemistry

Methodology

Freezing Point Depression

Testing Schedule

Daily

CPT Code(s)

83930

Reference Range

mOsm/kg


Male/Female: 280-300


Effective date: 03/27/2018

STAT Orderable (Y/N)

Yes

Performing Lab

UW

LOINC Code(s)

2692-2