TEST CATALOG ORDERING & RESULTS SPECIMEN HANDLING CUSTOMER SERVICE EDUCATION & INSIGHTS
Test Catalog

Test ID: PNYG    
Phenytoin, Total and Phenobarbital Group, Serum

Specimen Type Describes the specimen type validated for testing

Serum
Serum Red

Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing

One serum specimen (0.5 mL of serum) may be sent if using a red top tube.

 

Serum for Phenytoin:

Container/Tube: Red top Specimen Volume: 0.5 mL Collection Instructions: Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

 

Serum for Phenobarbital:

Container/Tube: Preferred: Serum gel Acceptable: Red top Specimen Volume: 0.5 mL Collection Instructions: 1. Serum gel tubes should be centrifuged within 2 hours of collection. 2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

Forms

If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.

Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory

0.25 mL for 2 specimens; 0.25 mL for 1 serum red top

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

Gross hemolysis Reject

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included

Specimen TypeTemperatureTimeSpecial Container
SerumRefrigerated (preferred)14 days
 Frozen 28 days
 Ambient 72 hours
Serum RedRefrigerated (preferred)7 days
 Frozen 14 days
 Ambient 7 days