What is the expected preductal SpO2 percentage 3 minutes after birth?

The expected preductal SpO2 (peripheral capillary oxygen saturation) percentage three minutes after birth is in the range of 70 percent to 75 percent. Immediately after birth, a newborn experiences the transition from fetal to extrauterine life, which includes significant changes in oxygenation. The preductal SpO2 refers to the oxygen saturation measured before the ductus arteriosus, typically utilizing the right hand.

At three minutes post-birth, the preductal SpO2 reflects the ongoing adaptation to breathing air rather than receiving oxygen through the placenta. Newborns typically achieve an SpO2 of 70% to 75% at this point as their lungs fill with air for the first time and they begin to establish effective respiration. It is crucial for medical professionals to understand these metrics because they guide interventions if the newborn is receiving inadequate oxygenation or is at risk for complications.

The other ranges would imply either insufficient transition to air breathing or a more serious oxygenation issue for a newborn. Thus, understanding the expected baseline of 70 percent to 75 percent is critical for assessing the immediate health and respiratory status of infants after delivery.