Children's Mercy Hospitals and Clinics
Name
Osmolality, Serum

CMH Lab Section
Chemistry

Specimen Requirements
0.5 mL of blood in a mint green or red top w/ yellow ring gel tube

Availability
STAT, Urgent, Routine

Turn Around Time
STAT: 1 hour
Routine: 2-4 hours

Methodology
Freezing Point Osmometry

Ranges
Age: 0-3days 266-296 mOsm/Kg
3days-adult: 275-296 mOsm/Kg

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