Test Details

Mnemonic

PENTO

Ordering Code

1750570

CPT-4 Code(s)

80345 (G0480)

Specimen Information

Collect

Red-top
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Specimen Preparation

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

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

0.2 mL
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Transport Temperature

Refrigerated
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Rejection Criteria

SST
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Stability

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