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THEOPHYLLINE LEVEL
MessageChemistry
Test Code
LAB35
Alias/See Also
Aminophylline
CPT Codes
80198
Preferred Specimen
Gold top (serum separator tube)
Minimum Volume
Whole blood: 600 uL (TWO full red-top microtainers or one full light green-top microtainer).
Serum/plasma: 300 uL
Serum/plasma: 300 uL
Other Acceptable Specimens
Red Top and light green top (lithium heparin plasma) acceptable
Instructions
LAB: Serum acceptable.
Separate specimen within 4 hours of collection.
Room Temperature: 7 days
Refrigerated: 7 days.
Frozen: 60 days.
Separate specimen within 4 hours of collection.
Room Temperature: 7 days
Refrigerated: 7 days.
Frozen: 60 days.
Specimen Stability
Ambient: 7 days
Refrigerated: 7 days.
Frozen: 60 days.
Refrigerated: 7 days.
Frozen: 60 days.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Plasma: Additives that chelate magnesium, such as: EDTA, Citrate, Fluoride oxalate
Report Available
Same day
Reference Range
Therapeutic: 10 - 20 mcg/ml
Toxic: Greater than 35 mcg/ml
Toxic: Greater than 35 mcg/ml
