|Available:||Daily, 24 hours|
|Specimen:||Heparinized plasma. Must be venipuncture.|
|Volume:||0.5 mL blood. Tube must be full, tightly capped, and PLACED ON ICE IMMEDIATELY.|
|Container:||Green top (heparinized) vacutainer or microtainer (see above instructions)|
|Temperature:||Place specimen immediately on ice and transport to lab within 15 minutes after collection.|
|Rejection:||Specimen not on ice, in transport longer than 15 minutes, hemolysis, traumatic stick.|
|Uses:||Liver function test, supports clinical diagnosis of hepatic encephalopathy, hepatic cirrhosis, Reye's Syndrome, or aminoacidurias of infancy.|
|Limitations:||Sodium citrate increases ammonia levels; Do not use hemolyzed specimens; Avoid stasis; do not leave tourniquet on for longer than 15 seconds; Do not use Ammonium heparin tubes; only 80% of patients with Reye's Syndrome are reported to have elevated ammonia levels.|
|Method:||Enzymatic biochromatic rate (NADP/NADPH)|
Online referral form
Did you know you can make a referral to any of our specialty clinics online? Use the form below to submit directly to central scheduling.
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