To prevent retinopathy of prematurity, the neonatal/pediatric specialist should

• A. Maintain PaO2 levels between 50-80 torr
• B. Not administer more than 30% oxygen
• C. Routinely draw arterial blood gas samples every three hours
• D. Limit oxygen therapy to twenty-four hours

Answer: (A)

Oxygen management is key to preventing retinopathy of prematurity because newborn retinal vessels are immature and highly sensitive to oxygen levels. The goal is to provide enough oxygen to meet tissue needs without exposing the infant to hyperoxia, which can disrupt normal retinal vessel development and trigger abnormal neovascularization later. Targeting a PaO2 in the range of about 50–80 torr helps achieve this balance: it avoids both undersupply and excessive oxygen exposure that increases the risk of ROP, while still supporting overall organ oxygen delivery as the infant stabilizes.

Relying on a fixed ceiling like a maximum FiO2 (for example, no more than 30%) isn’t ideal because an infant’s oxygen needs vary, and a fixed percentage can lead to periods of insufficient oxygenation if the infant’s condition changes. Routine arterial blood gas sampling every few hours isn’t necessary for every patient and can be invasive; oxygenation is best guided by continuous monitoring (like pulse oximetry) with ABGs obtained as clinically indicated. Limiting oxygen therapy to a set duration (such as 24 hours) doesn’t address the real issue, which is avoiding prolonged hyperoxia; some infants require oxygen for longer than a day, and careful titration to keep PaO2 in the target range remains essential.