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.

Minimum Volume

0.5 mL

Transport Temperature

Refrigerated

Rejection Criteria

Serum separator tube (SST)

Stability

Room temperature: 48 hours
Refrigerated: 7 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 areflexive: 25 - 30 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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