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Osmolality, Serum
MessageFor Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.
Test Code
OSMOS
Alias/See Also
70302;
Serum Osmolality;
Serum Osmolality;
CPT Codes
83930
Preferred Specimen
1 mL serum (SST)
Minimum Volume
0.5 mL
Other Acceptable Specimens
Plasma from Lithium Heparin (Light Green Top) tube
Instructions
Avoid hemolysis. Invert a minimum of 5 times then allow to clot in an upright position for 30 minuties. Centrifuge the SST for at least 10 minutes. Keep tightly stoppered.
Transport Container
SST (speckled top) tube
Transport Temperature
Refrigerated (preferred)
Specimen Stability
Room Temperature = 48 hours
Refrigerated = 48 hours centrifuged
Frozen = n/a
Refrigerated = 48 hours centrifuged
Frozen = n/a
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.
Methodology
osmometer
Setup Schedule
24/7
MVCHEM
MVCHEM
Report Available
1 day excluding weekends
Performing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, OH 45439
