Phenytoin, free

Alphabetical Test listing

Phenytoin, free-1993

  
Phenytoin, free
  
1993
  
80186.0
  
PNF
  
Cerebyx
DPH
Fosphenytoin
PHT
PNF
Unbound Dilantin
  

Fosphenytoin is ProDrug of Phenytoin and is measured as Phenytoin

  
Serum
  
  
2.0 mL
  
0.5 mL
  
  • Specimen should be collected:
    • Peak (regular release): 1-3 hours post dose
    • Peak (slow release): 4-12 hours post dose
    • Trough: Immediately prior to next dose
  • Immediately following collection, thoroughly mix sample by gently inverting 5 times
  
  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin within two (2) hours of sample collection
  

Gold serum separator (SST) tube

  
Lithium heparin (Li hep) plasma
  
  

Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting

  

Spin within two (2) hours of sample collection

  

Lt green plasma separator (PST)

  

Refrigerated (preferred) - 7 days

Ambient - 2 days

Frozen - 5 months

  
  • Improper labels (unlabeled or mislabeled)
  • Hemolysis (some procedures)
  • Improper anticoagulant or ratio
  • Delay in transport
  • Improper storage temperature affecting results
  • Inappropriate timing of collection
  • Improper container
  • Leaking container resulting in compromised specimen
  • Quantity not sufficient (QNS)
  
AHL - Chemistry: C
  
Daily
  
1 day
  

Chemiluminescent Micro-particle Immunoassay (CMIA)

  

1.2 - 2.5 µg/mL

  

> 3.0 µg/mL

  
80186
  
11/30/2001
  
02/12/2020
  
12/02/2021