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Phenytoin, Free
MessageFor Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.
Test Code
FDIL
Alias/See Also
70398;
Dilantin, Free
Dilantin, Free
CPT Codes
80186
Preferred Specimen
serum
Minimum Volume
0.5 mL
Instructions
Barrier tubes (serum separator tubes) are preferred. If non-barrier tubes are utilized, the serum must be removed immediately after centrifuging and placed in a screw-cap transfer tube.
Collection notes: Avoid hemolysis. Invert tubes at least 8 times. Allow to clot in an upright position for 30 minutes. Within 2 hours, centrifuge tubes 10 minutes. Keep tightly stoppered.
Do NOT re-centrifuge tubes. Do NOT freeze the primary collection tube.
TRANSFER TO SCREW-TOP TRANSPORT TUBE.
Collection notes: Avoid hemolysis. Invert tubes at least 8 times. Allow to clot in an upright position for 30 minutes. Within 2 hours, centrifuge tubes 10 minutes. Keep tightly stoppered.
Do NOT re-centrifuge tubes. Do NOT freeze the primary collection tube.
TRANSFER TO SCREW-TOP TRANSPORT TUBE.
Transport Container
Screw-top plastic transport tube
Transport Temperature
Room Temperature or Refrigerated
Specimen Stability
Room Temperature = 4 days
Refrigerated = 4 days
Frozen = 2 months
Refrigerated = 4 days
Frozen = 2 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.
Methodology
immunoassay
Setup Schedule
DAILY
AU
AU
Report Available
daily
Performing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, OH 45439
Last Updated: November 23, 2021