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
Refrigerated: 14 days
Frozen: 14 days
Methodology
High Performance Liquid Chromatography
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
Comatose reflexive: 15 – 20 µg/mL
Comatose with circulatory and/or respiratory difficulty: 40 – 50 µg/mL
Toxic >50
Performing Laboratory
Warde Medical Laboratory