What is the recommended oxygen delivery method for a 34-week neonate with ABG values showing hypoxemia, specifically delivering FiO2 around 0.45?

• A. Mechanical ventilation
• B. Intubate and CPAP at 4 cmH2O FiO2 0.60
• C. Oxygen hood FiO2 0.45
• D. Isolette FiO2 0.55

Answer: (C)

The key idea is delivering a precise, noninvasive oxygen level to a premature infant who is hypoxemic. For a targeted FiO2 around 0.45, the oxygen hood is the best choice because it surrounds the infant’s head with a controlled gas mixture, allowing relatively accurate delivery of moderate oxygen without intubation. With proper high-flow delivery (enough flow to minimize room air entrainment), a hood can achieve FiO2 roughly in the 0.4–0.6 range, making it suitable for a FiO2 of about 0.45. It also preserves warmth, allows easy access for assessment and suctioning, and is less invasive than other options.

An incubator (isolette) can raise ambient oxygen but is less precise for fixed FiO2 levels and depends on the incubator’s mixing, so targeting 0.45 can be more variable. Intubation with mechanical ventilation or even CPAP at a higher FiO2 would be more invasive than necessary for this FiO2 target and is typically reserved for more severe respiratory failure or when noninvasive measures fail.