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HelpPhenytoin Level, Total
Collection Requirements
Trough: Levels are best if drawn immediately before next dose
Source: blood
Container(s):
- Preferred: Sodium heparin green
- Acceptable: Red
Volume: 1 mL in vacutainer or 500 uL in microtainer
Special Instructions
Do not use gel tubes
Turn Around Time
STAT: 1 hour
Routine: 2-4 hours
Availability
STAT
Routine
Lab Processing Instructions
Specimen: plasma or serum
Spin, separate, and refrigerate
Performing Laboratory
Adele Hall
Adele Hall Lab Section
Chemistry
Instrumentation/Methodology
Vitros
Critical Values
>25 mcg/mL
Reference Ranges
10 - 20 mcg/mL
CPT
80185