Phenytoin

Alphabetical Test listing

Phenytoin-91

  
Phenytoin
  
91
  
80185.0
  
PTN
  
Cerebyx
Dilantin
DPH
Fosphenytoin
PHT
  

Fosphenytoin is ProDrug of Phenytoin and is measured as Phenytoin.

  
Lithium heparin (Li hep) plasma
  
  
1.0 mL
  
0.2 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
  

Spin

  

Lt green plasma separator (PST)

  
Serum
  
  

Spin

  

Gold serum separator (SST) tube

  

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)

  

10.0 - 20.0 µg/mL

  

> 30.0 µg/mL

  
80185
  
11/30/2001
  
02/12/2020
  
02/10/2020