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Mayo Clinic Laboratories

Test Code THEO Theophylline, Serum or Plasma

Methodology

Enzyme Immunoassay (EIA)

Specimen Requirements

Container/Tube:

Preferred: Lithium heparin (light green-top)

Acceptable: Serum Gel

 Draw blood, spin down and send 1 mL (pediatric:  0.2 mL) of plasma or serum.

Reject Due To

 

Hemolysis

Mild:

ok

Gross:

ok

Lipemia

Mild:

ok

Gross:

Reject

Icterus

Mild:

ok

Gross:

ok

 

Reference Values

Therapeutic concentration
Adults:  10-20 µg/mL
Critical value:  >25 µg/mL

Day(s) Test Set Up

Monday through Sunday

CPT Coding

80198

Performing Laboratory

Huntsville Hospital Laboratory

Secondary ID

HHA1487

LOINC Coding

Test Name LOINC Code

Theophylline, Serum or Plasma

 4049-3

 

Specimen Stability Information

 

Specimen Type

Temperature

Time

Plasma,lithium heparin / Serum

Refrigerated, spun

7 days