Test Details
Mnemonic
VAAF
Ordering Code
3423740
CPT-4 Code(s)
80165
Specimen Information
Patient Preparation
Collect trough sample (1 hour before next dose). Avoid contact of samples with plasticizers, fatty acids, varnishes, paint fumes.
Collect
Red top
Specimen Preparation
Centrifuge, separate serum from cells and send 3.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Serum: Dark blue trace element no additive
Plasma: Lavender EDTA, dark blue EDTA
Plasma: Lavender EDTA, dark blue EDTA
Minimum Volume
1.0 mL
Transport Temperature
Refrigerated
Rejection Criteria
Serum separator tube (SST)
Stability
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 60 days
Refrigerated: 7 days
Frozen: 60 days
Methodology
Immunoassay
Reference Range
4.8 - 17.3 mg/L
Performing Laboratory
Quest Valencia
New York DOH Approval Status
Yes