THEOPHYLLINE

Test Code: 140Specimen Collection: Serum
Component:

Theophylline

Method:

IA

Collection Notes: Collect as a trough just before the next dose. Plasma should be physically separated from cells as soon as possible with a maximum limit of 2 hours from the time of collection. Centrifuge and physically separate the plasma using a plastic transfer pipette into a separate plastic transfer tube.
Clinical Utility: Theophylline levels are useful for monitoring optimal therapeutic levels and for assessing toxicity.
CPT Code: 80198Testing Location: Sent to reference lab
SPECIMEN/STABILITY TYPE
Temperature:

Serum (1 mL) Red top

Refrigerated
 
7
 
Days
Frozen
 
3
 
Months

Plasma (1 mL), Li heparin or EDTA

Refrigerated
 
7
 
Days
Frozen
 
3
 
Months
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