Sign in →

Theophylline Level

Collection Requirements

Drawing instructions:

  • IV - 30" post loading dose 
  • If continuous infusion follows, check level at 6 & 12 hr after beginning infusion
  • Oral - 2 hr post (rapid release) 4 hr post (sustained release) 

Monitor caffeine as well in neonates

 

Source: blood
Container(s):

  • Preferred: Sodium heparin green
  • Acceptable: Red

Volume: 1 mL in vacutainer or 500 uL in microtainer

Special Instructions

Do not use gel tubes

Turn Around Time

STAT: 1 hour
Routine: 2-4 hours

Availability

STAT
Routine

Lab Processing Instructions

Specimen: plasma or serum
Spin, separate, and refrigerate

Performing Laboratory

Adele Hall

Adele Hall Lab Section

Chemistry

Instrumentation/Methodology

Vitros

Critical Values

>25 mcg/mL

Reference Ranges

Therapeutic: 10 - 20 mcg/mL

CPT

80198