Test Code OSMO Osmolality, Serum
Performing Laboratory
ChristianaCare:
- Newark Campus
- Wilmington Campus
Methodology
Freezing Point Depression
Useful for evaluation of electrolyte balance, hyperosmolar status,
and hydration status.
Reference Values
275-295 mOsmol/kg H2O
Physician Office Specimen Requirements
Container/Tube: 3.5-mL gel
separator tube
Specimen: Full tube
Collection Instructions: For pediatrics,
draw blood in a 0.5-mL green-top MICROTAINER®.
Note: Label tube with patient’s full
name and 1 additional unique patient identifier such as date
of birth, medical record number, emergency ID number, date and time
of draw, collector’s initials, and type of specimen.
Day(s) Test Set Up
Monday through Sunday
Routine Turnaround Time: 8 hours
STAT Turnaround Time: 1 hour