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HelpTest Code OSMO Osmolality, Serum LAB107
Test Method
Freezing Point Osmometry; Osmo 1, Advanced Instruments
Specimen Requirement
0.5 mL serum is required. Serum gel tubes are acceptable.
Reference Values
275-295 mOsm/kg
Performance
Testing is performed Monday through Sunday.
Typically completed within 4 hours after the specimen
arrives at the testing site.
CPT Code Information
83930 Chemistry: Osmolality; blood
LOINC Code Information
2692-2 Osmolality Of Serum Or Plasma
Useful For
Evaluating acutely ill or comatose patients.
Additional Specimen Collection Information
Collect blood in a red-top tube.
Serum and urine specimens should be tested as soon as
possible
after collection in order to obtain accurate osmolality results.
It
is recommended that specimens are tested within 24 hours.
Specimens
can be refrigerated at 2-8 °C for up to 7 days.