Test directory: Theophylline

Ordering Code443
Test NameTheophylline
Preferred SpecimenPlasma
Preferred ContainerLithium Heparin PST (Green)
Other Specimen/ContainerSerum in Plain (Red), Serum in SST (Gold)
Optimum Volume0.5 mL
Handling InstructionsSend aliquot if transport time >24 hours.
Transport RequirementsOahu: Refrigerated
Airline: Refrigerated
Send frozen aliquot if transport time >1 week.
Specimen StabilityRefrigerated: 24 Hours (Centrifuged, unaliquoted gel separator tubes) 1 Week (Aliquot)
Frozen: 2 Months (Aliquot)
Frozen samples should be thawed only once
Test cannot be added to >24 hours unaliquoted specimens collected in a gel separator tube.
Rejection CriteriaGrossly hemolyzed, Insufficient quantity, Specimen older than stability limits, Uncentrifuged gel separator tube specimens >2 hours old, Unaliquoted gel separator tube specimens >24 hours old
Avail. StatYES
Analytic Time1 Day
MethodologyKinetic Interaction of Microparticles in Solution (KIMS)

Reference range(s)

ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
TheophyllineALL10.0-20.0>= 20.110.0-20.0>= 20.1ug/mL