What serves as a reliable indicator of persistent central cyanosis during neonatal resuscitation?

• A. Acrocyanosis lasting more than 60 seconds
• B. Assessment of target pre-ductal oxygen saturation when reliable pulse oximetry signal has been achieved
• C. Visual inspection of lips, tongue and torso which will persistently appear blue
• D. Saturation at 95 percent on pulse oximetry

Answer: (B)

Central cyanosis during neonatal resuscitation is best assessed with an objective oxygenation target from a reliable pulse oximeter reading on the pre-ductal site (the right hand). This pre-ductal measurement reflects central arterial oxygenation before mixing at the ductus arteriosus, so it tells you what the brain and other central tissues are actually receiving. In the first minutes after birth, peripheral cues like acrocyanosis are common and can mislead you about central oxygenation. If the pre-ductal SpO2 fails to reach the expected target for the infant’s age and time after birth, central hypoxemia persists and requires escalation of support. A saturation around 95% indicates adequate oxygenation and does not indicate persistent central cyanosis. Visual blue color of the lips or torso is unreliable on its own due to lighting and perfusion factors. Thus, the reliable indicator is checking target pre-ductal oxygen saturation once a reliable signal is obtained.