Children's Mercy Hospitals and Clinics
Name
Ammonia

CMH Lab Section
Chemistry

Specimen Requirements
0.5 mL blood in pre-chilled heparin green tube

Availability
STAT, Urgent, Routine

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

Special Instructions
Deliver specimen to the lab on ice immediately.

Processing Instructions
Specimens not placed on ice MUST be spun within 15-minutes of collection.
Specimens placed on ice MUST be spun within 1-hour of collection.

Separate and freeze plasma if not tested immediately.

Methodology
Vitros 5.1 FS

Ranges
Age dependent
0-2wks: 15-92 umol/L
2wks-2y: 10-62
>2y: 4-33

Critical: >200 umol/L

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