Lab Test : Osmolality, Blood

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Alternate:Serum Osmolality
Includes:Serum Osmolality
Department:Chemistry
Phone:(937) 641-3428
SQ Code:OSMS
Available:Daily, 24 hours
Turnaround:Routine: 2 hours, STAT: 30 minutes
Specimen:Blood
Volume:mL plasma or serum
Container:3 mL green top tube or green microtainer (sodium heparin)
Temperature:Stable 2 hours at room temperature.
Rejection:Hemolysis
Normal:281-308 mOsm/kg
Uses:Measure of the number of osmotically active particles in serum to determine the cause of fluid and electrolyte imbalances.
Limitations:N/A
Method:Freezing point depression
 

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