Uric Acid, Patients on Rasburicase 
Mnemonic URIC RAS
CPT 84550
Test Code 1000720
Test Includes  
Specimen Plasma
Volume 1.0 mL
Container Plasma from Light Green Top (Lithium Heparin) Tube
Special Instructions After venipuncture, note the time of collection, mix tubes containing anticoagulant by gentle inversion and place tubes on ice immediately. Send to the laboratory on ice.
Specimen Prep Centrifuge in a cold centrifuge, transfer plasma to plastic transport tube and keep on ice or refrigerated until analysis.
Storage Refrigerate
Transport Temp Refrigerated
Stability Rm Temp Not Stable
Stability Refrig 4 hours from collection
Stability Frozen N/A
Methodology Uricase
Rejection Criteria Specimen not sent on ice.  
Reference Value Female: 2.4 - 5.7 mg/dL; Male: 3.4 - 7.0 mg/dL 
Performed/TAT Monday - Sunday        
Comments This test is intended to monitor uric acid concentrations in patients on Rasburicase. Submit a dedicated specimen. Send separate tubes for additional tests on the same specimen type