Theophylline

Department

Core Biochemistry

Delphic Registration Code

THEO

Synonyms

Aminophylline
Nuelin

Turnaround Time

3 hours

Test Code

4781

Specimen Type

• Serum
• Plasma

Specimen Requirements

Tube/Container Type:

Preferred

• Lithium Heparin - Non-gel (Green Cap)

Preferred if West Coast

• SST II (Gold Cap)

Acceptable

• Serum (Red Cap)
• SST II (Gold Cap)
• Lithium Heparin - Gel (Light Green Cap)

Preferred Sample Volume (ml)

4.5

No of Samples Required

1

Paediatric Specimen Requirements

Tube/Container Type:

Preferred

• Lithium Heparin - Non-gel (Green Cap)

Acceptable

• Serum (Red Cap)
• SST II (Gold Cap)
• Lithium Heparin - Gel (Light Green Cap)

Preferred Sample Volume (ml)

0.6

Additional Specimen Information

Samples should be collected pre-dose

Aliquot Instructions

Sample Type

• Serum
• Plasma

Minimum Volume (ml)

0.6

Transport to Lab

Ambient (8 - 24 degrees Celsius)
If overnight - Chilled (2 - 8 degrees Celsius)

Interpretation

The standard half-life of theophylline is 8 hours, with time to steady-state of 3 days.

Reference Intervals

55 – 110 umol/L

Test Method

Homogenous enzyme immunoassay performed on Beckman Coulter AU5822 analysers using Beckman Coulter reagents.

Non-Funded Test Cost

$25.28 (Exclusive of GST)

Billing Code

4781

Contact Information

Enquiry Form