Test Directory

Ammonia, Plasma

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Updated Test Information:

Test Description
Ammonia, Plasma
Synonym(s)
Ammonia
Test ID
NH3V
General Information
Useful for:
Assisting in the diagnosis of hepatic coma
Investigating and monitoring treatment for inborn errors of metabolism
Evaluating patients with advanced liver disease
Specimen Type
Plasma
Specimen Requirements
Lavender
Specimen Collection / Processing Instructions
Lavender - 1.Specimens should be put on ice immediately after collection. 2.Centrifuge at refrigerated temperature (4 degrees C). 3.Aliquot plasma into plastic screw-top tube. Keep on ice. 4.Freeze plasma within 2 hours of draw.
Stability
Frozen (preferred) 7 days
Refrigerated 2 hours
Unacceptable Specimen Conditions
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Methodology
Photometric, Bromophenol Blue (VITROS Dry Slide)
Estimated TAT
1 day
Testing Schedule
Monday-Sunday
CPT Code(s)
82140
Minimum Sample Volume
0.50 mL
Reference Range
< or =30 mcmol/L
Performing Lab
Mayo
LOINC Code(s)
16362-6