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Test Code ELITEK or LAB2429 Uric Acid, Elitek

Important Note

Specimens must be sent to the lab on ice.

For non-Elitek patient testing, please order Uric Acid, Serum or Plasma (LAB4850).

Specimen Requirements

Container Type:

Required: pre-chilled green (non-gel) top

Optimal Collection Volume: 

4.5mL; full tube

Minimum Volume:

1 mL

Collection Instructions:

1. Draw blood in a prechilled green top (non-gel) tube.

2. Gently invert the sample 5-6 times after collection.

3. Put the tube immediately on ice.

4. Send specimen to the lab on ice.

Specimen Transport:

Refrigerate

Processing Instructions: 

1. Spin the specimen in the 4C centrifuge located in accession.

2. After centrifugation, aliquot the plasma to a labeled false-bottom tube. Keep on ice until testing can be performed.

3. The aliquot must be tested within 4 hours on ice. 

Specimen Stability

Specimen Type Temperature Time
Serum* On ice 4 hours

Specimen Rejection Criteria

Specimen not tested within four hours (when kept on ice).

Useful For

Elitek (Rasburicase) is a drug used for leukemia and lymphoma patients on chemotherapy. When chemotherapy kills the cells, uric acid is a breakdown product of all the nuclear cellular material. The uric acid levels can get high enough to cause kidney damage. The drug Elitek causes uric acid to break down into a harmless substance (allantoin). Therapy on these patients is closely monitored by performing multiple uric acid levels. 

Methodology

Roche Cobas - Colorimetric

Reference Ranges

2.5-8.0 mg/dL

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Chemistry - Kalamazoo, Battle Creek, Paw Paw, South Haven

Sample Retention Time

7 days

CPT Code

84550