Test Details

Mnemonic

PENTO

Ordering Code

1750570

CPT-4 Code(s)

80345 (G0480)

Specimen Information

Collect

Red top

Specimen Preparation

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

Alternate Specimen

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

Minimum Volume

0.2 mL

Transport Temperature

Refrigerated

Rejection Criteria

Serum separator tube (SST)

Stability

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

Methodology

High Performance Liquid Chromatography
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Reference Range

Prefers sleep: 10 – 15 µg/mL
Comatose reflexive: 15 – 20 µg/mL
Comatose with circulatory and/or respiratory difficulty: 40 – 50 µg/mL
Toxic >50
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Performing Laboratory

Warde Medical Laboratory
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