Phenytoin Lvl Total (PYT)

Department: Special Chemistry
Test Synonym(s): LAB31, Dilantin, PYT
CPT Codes: 80185
Methodology: Enzyme Immunoassay
Reference Range: Therapeutic range: 10 - 20 mcg/mL
Tube Type: Dark green top (Sodium Heparin) - 6.0 mL
Specimen: Plasma
Alternate Specimen: Red top (no gel)
Pediatric Requirements: 2 dark green microtainers
Volume: 1.5 mL plasma
Minimum Volume: 0.4 mL plasma
Temperature: Refrigerated if not delivered to the lab immediately
Stability: <=2 days at 20-25oC, <= 1 month at 2-8oC, <=5 months at -20oC
Reasons for Rejection: Hemolysis, low volume
Days Performed: Daily
Times Performed: Continuous
TAT: Stat: 1 hour, routine: 2 hours
Special Instructions: Draw immediately before next dose. Refrigerate if not delivered immediately.

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