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phenytoin, free
Synonyms: Dilantin, Free 
Computer Code: FRDL
Specimen Collection: 3 mL blood (red top tube).
Transport immediately. Must be received in lab within 2 hours of draw. 
Minimum Volume: 1.0 mL 
Handling Instructions for Offsite Areas: Within 2 hrs of draw time, the serum must be centrifuged and an ultrafiltrate prepared as follows: Allow specimen to clot, centrifuge for 20 minutes, remove serum and fill micropartition reservoir (thin top part) with 1-1.2 mL of serum. Cap the reservoir and place the apparatus in a centrifuge for 15-20 minutes at 3500 rpm. The ultrafiltrate will enter the cup portion of the apparatus. Remove the top reservoir. Cap the cup containing ultrafiltrate. Cap securely. Place the cup in a 16 x 100 mm test tube which is properly labeled and refrigerate. A minimum of 100 µl of ultrafiltrate is needed for the assay. If insufficient volume is generated, a second apparatus can be filled with serum and spun. The ultrafiltrate can then be combined. 
Reference Values: 1-2 mg/L (draw sample one hour or less before next dose)  
Lab Code: CC 
Requisition: TOXI
Test Frequency: Daily 
Routine TAT: 4 hr 
Stat TAT: 2 hr 
CPT Code(s): 80186 
LCD or NCD:  
Methodology Used: 27
See Addendum XVII

Albany Medical Center
43 New Scotland Avenue
Albany, NY, 12208
Date: 05/24/2016
Time: 13:47:29 (24hr)