Blood Sciences Test


Caffeine

Specimen

Serum

Lab Tests Online

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Special Instructions

Not routinely available contact duty biochemist on ext 2935 to discuss

Units

mg/L

Test Usage

Caffeine is effective in reducing the number of episodes of neonatal apnea. Apnea is most frequently seen in premature infants and is a significant contributor to the morbidity of low birth weight infants. Because of its long half-life, daily administration is common. Monitoring of caffeine levels is usually performed only on those patients who are unresponsive to high doses of caffeine or who have signs of toxicity. The neonate does not have a well-developed cytochrome P450 system for metabolism of caffeine so toxicity is a concern. Signs of toxicity include tachycardia, gastrointestinal intolerance, and jitteriness. Toxicity is usually not observed at caffeine concentrations below 80 ug/mL. Sever life threatening toxicity has been reported at concentrations above 300 mg/l.

Turnaround Time

28 days

Availability

Referred test

Specimen Labelling Procedure