What is the normal PaO2 range in arterial blood for a term neonate?

The normal range for PaO2 (partial pressure of oxygen) in arterial blood for a term neonate is between 50 to 80 mm Hg. This range is crucial for assessing the adequacy of oxygenation in newborns.

In the context of a term neonate, an arterial blood gas analysis showing a PaO2 within this range indicates effective oxygen exchange in the lungs and sufficient oxygenation of the blood. Adequate oxygen levels are vital for the neonate's metabolic processes and overall health, particularly in the first few days after birth when the infant's respiratory system is adapting to life outside the womb.

Understanding the physiological adaptation following birth is important for neonatal care. Term neonates typically experience improved pulmonary function due to factors such as the clearance of fetal lung fluid and the transition to breathing air, which allows for an increase in arterial oxygen levels to the established normal range. Regular monitoring of oxygen levels helps clinicians identify any potential respiratory issues early and intervene appropriately.