Ammonia, Blood

Overview
Department	Biochemistry
Test Code	WAMM
Synonyms	NH3
Turnaround Time	3 hours
Stability – Add test	Cannot be added on.
Specimen Requirements
Specimen Type	Plasma
Preferrred	4 mL EDTA (K2E) Purple-Top on ice.
Acceptable
Specimen Transportation	On ice. Sample must be received at lab within 15 minutes of collection.
Pediatric Requirements	600uL EDTA (K2E) Pink-Top Microtainer on ice.
Aliquot Requirements
Sample Type	Plasma
Minimum Volume	200 uL
Aliquot Transportation	Frozen
Clinical Information
Reference Intervals	FEMALE: 11-51 umol/L MALE 16-60 umol/L
Test Method	Abbott Alinity C. Enzymatic method.
Advanced Notice	Please notify Biochemistry extension 7881
Patient Preparation	Ideally patient fasted >6 hours. No fist clenching.
Comments
Specimen must be centrifuged at 4°C IMMEDIATELY after receipt.  False high values are obtained after muscular exercise. Please notify the laboratory if patient is on Sulfasalazine/Sulfapyridine medications as these may interfere with this method