Children's Mercy Hospitals and Clinics
Name
Osmolality, Urine

CMH Lab Section
Chemistry

Specimen Requirements
minimum 1 mL urine in polycup or urine collection tube

Availability
STAT, Urgent, Routine

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

Methodology
Freezing Point Osmometry

Ranges
Age: 0-1 year 50-645 mOsm/kg
Age: >1 year 98-960 mOsm/kg

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