| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Phenytoin Level Total
MessageChemistry
Test Code
LAB31
Alias/See Also
Phenytoin
Dilantin
Dilantin
CPT Codes
80185
Includes
Phenytoin / Dilantin
Preferred Specimen
Gold top (serum separator tube)
Minimum Volume
Whole blood: 600 uL (TWO full red-top microtainers or one full light green-top microtainer).
Serum/plasma: 300 uL
Serum/plasma: 300 uL
Other Acceptable Specimens
Red Top and light green top (lithium heparin plasma) acceptable
Instructions
LAB: Hemolyzed specimens should not be used. Separate specimen within 4 hours of collection. Ambient: up to 8 hours. Refrigerated: 1 week. Freeze for longer storage. Centrifuge refrigerated or frozen specimens prior to analysis.
Specimen Stability
Ambient: up to 8 hours.
Refrigerated: 1 week.
Frozen: up to 12 weeks.
Refrigerated: 1 week.
Frozen: up to 12 weeks.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed, contaminated, not enough volume
FDA Status
Approved
Setup Schedule
Everyday
Report Available
Same day
Limitations
Specimens with an elevated total protein >9.0 g/dL may give a positive bias greater than 2.3 μg/mL
Reference Range
Therapeutic: 10 - 20 mcg/ml
Performing Laboratory
Hoag Newport/ Hoag Irvine
