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Osmolality, Serum

Test Name:Osmolality, Serum
Epic Order Code:LAB107  
CPT Code:83930  
Specimen(s) Type:Serum  
Acceptable Container(s):Tops are gold and red.
Testing Schedule:24 hrs/day, 7 days/week
Turn Around Time:STAT: 1 hour  
 Routine: 2 hours  
Collection Information:No special patient preparation is required. Obtain specimen by standard collection procedures.
Transport Information:Deliver to lab immediately. All specimens must be signed into the laboratory.
Reference Clients:If unable to deliver to the lab within 1 hour, centrifuge the specimen and remove serum from the red cells. Store and transport at 2-8° C. Specimen must be received in the lab within 24 hours.
Causes for Rejection:Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport.
Reference Range:280 - 295 mOsm/kg
 Critical Values: < 250 or > 325 mOsm/kg
Additional Information:Additives such as anticoagulants from collection tubes may contribute significantly to the measured osmolality.