Test Details

Mnemonic

DESPR

Ordering Code

1750300

CPT-4 Code(s)

80335 (G0480)

Specimen Information

Collect

Red-top

Specimen Preparation

Centrifuge, separate serum from cells and send 1.0 mL serum refrigerated in a screw-capped plastic vial.

Alternate Specimen

Plasma: Lavender EDTA, gray sodium fluoride, green sodium or lithium heparin, potassium oxalate

Minimum Volume

0.5 mL

Transport Temperature

Refrigerated

Rejection Criteria

SST

Stability

Room temperature: 48 hours
Refrigerated: 14 days
Frozen: 14 days

Methodology

High Performance Liquid Chromatography
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Reference Range

Therapeutic: 150 – 300 ng/mL
Toxic: >500 ng/mL
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Performing Laboratory

Warde Medical Laboratory
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