The pre-ductal SpO2 target for a newborn at 1 minute of life is approximately:

• A. 60%-65%
• B. 70%-75%
• C. 80%-85%
• D. 50%-55%

Answer: (A)

During the first minutes after birth, oxygen saturation climbs as the lungs aerate and pulmonary blood flow increases. The preductal measurement, taken on the right hand, reflects systemic arterial oxygen content before the ductus arteriosus mixes blood, so it serves as an early indicator of how well the newborn is oxygenating during transition.

At about one minute of life, a SpO2 in the low 60s is typical and within the expected range. This is the early phase of transition when the newborn is just starting to breathe effectively and oxygenation is still ramping up. The other ranges represent values you’d more likely see a little later in the transition: around two to three minutes you might approach the lower 70s, and by five to ten minutes SpO2 commonly climbs into the 80s or higher. A reading in the 50s at one minute would be unusually low for uncomplicated transition and would prompt reassessment of ventilation and perfusion.

So, the target around one minute is a SpO2 in the low 60s, reflecting the natural, gradual rise in oxygenation during early neonatal transition.