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L-Asparaginase Activity Assay
Test Code39211
CPT Codes
82657 (x3)<br>** This test is not available for New York patient testing **
Preferred Specimen
2 mL serum
Minimum Volume
0.5 mL
Instructions
Venous collection: Red-top tube or gel-barrier tube, separate serum from RBCs within 2 hours, freeze/refrigerate serum immediately.
The specimen transport bags have two pouches: place the specimen in the larger sealable pouch with absorbent material. Insert the requisition into the rear pocket. Frozen or refrigerated specimens must be transported in insulated containers surrounded by an ample amount of dry ice (frozen) or frozen cold packs (refrigerated) to keep the specimen at storage condition until arrival to the laboratory. Specimens received internationally must be shipped using dry ice. It is recommended that samples shipped during the summer months be shipped frozen on dry ice due to the potential exposure to high temperatures during shipment. Specimens that arrive outside of indicated storage conditions are unsuitable for analysis; sample will be reported as not performed and a resubmission will be
requested.
SHIPMENTS ARE NOT ACCEPTED DURING THE WEEKEND. SHIP MONDAY-THURSDAY FEDEX OVERNIGHT.
The specimen transport bags have two pouches: place the specimen in the larger sealable pouch with absorbent material. Insert the requisition into the rear pocket. Frozen or refrigerated specimens must be transported in insulated containers surrounded by an ample amount of dry ice (frozen) or frozen cold packs (refrigerated) to keep the specimen at storage condition until arrival to the laboratory. Specimens received internationally must be shipped using dry ice. It is recommended that samples shipped during the summer months be shipped frozen on dry ice due to the potential exposure to high temperatures during shipment. Specimens that arrive outside of indicated storage conditions are unsuitable for analysis; sample will be reported as not performed and a resubmission will be
requested.
SHIPMENTS ARE NOT ACCEPTED DURING THE WEEKEND. SHIP MONDAY-THURSDAY FEDEX OVERNIGHT.
Transport Temperature
Frozen
Specimen Stability
Room temperature: 24 hours
Refrigerated: 72 hours
Frozen: 30 days
Refrigerated: 72 hours
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Icteremia
Methodology
Spectrophotometry/Absorbance based Enzyme-Coupled Kinetic Reaction
FDA Status
This test was developed and its performance characteristics determined by Granger Genetics. It has not been cleared or approved by the FDA. The laboratory is regulated under CLIA as qualified to perform high-complexity testing. This test is used for clinical purposes. It should not be regarded as investigational or for research.
Setup Schedule
Set up: Tues-Fri; Report available: 3-5 days
Clinical Significance
Used to monitor Asparaginase therapy for sufficient enzyme activity, to assess silent inactivation by patient sensitization (activity assay). To assess if patient is producing antibodies against asparaginase (antibody assay).
