4.3 Article

Systemic Absorption of Cyclopentolate and Adverse Events After Retinopathy of Prematurity Exams

Journal

CURRENT EYE RESEARCH
Volume 41, Issue 12, Pages 1601-1607

Publisher

TAYLOR & FRANCIS INC
DOI: 10.3109/02713683.2015.1136419

Keywords

Adverse events; cyclopentolate; preterm infant; retinopathy of prematurity; screening exams

Categories

Funding

  1. University of Arkansas for Medical Sciences Medical Research Endowment fund

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Purpose: Preterm infants undergoing Retinopathy of Prematurity Eye Exams (ROPEE) may experience adverse events, possibly from systemic absorption of cyclopentolate. The purpose of this study was to analyze the association between adverse events and drug levels found in neonates undergoing ROPEE.Materials and Methods: 25 infants were randomized into two groups during routine ROP screening: 5 infants for blood collection before mydriatic drops and 20 for blood collection 1 h after eye drops. Blood was collected onto dried blood spot cards, extracted, and analyzed for cyclopentolate and phenylephrine using liquid chromatography and mass spectrometry. Relationships between drug levels and adverse events were assessed.Results: Cyclopentolate (range 6-53 ng/ml) was observed in 15 of 18 infants, while phenylephrine was not detected. Levels of cyclopentolate were significantly higher in infants who were on oxygen (p = 0.01). There was a significant association between cyclopentolate levels and gastric residuals in tube-fed infants not receiving oxygen (p = 0.01).Conclusions: Cyclopentolate levels varied among preterm infants after ROPEE. Cyclopentolate was positively associated with increased gastric residuals. Underlying medical conditions requiring oxygen administration may affect absorption and metabolism of cyclopentolate. There is a need to predict infants at risk for high blood levels of cyclopentolate in order to prevent or treat adverse events after ROPEE.

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