Final answer:
Newborn resuscitation may start with room air or up to 100% oxygen, and oxygen saturation is monitored using a pulse oximeter to guide oxygen concentration.
Step-by-step explanation:
Resuscitation of the term newborn may begin with room air (21% oxygen) or up to 100% oxygen, and the inspired oxygen concentration used during resuscitation is guided by the use of a pulse oximeter which measures oxygen saturation (percent sat). A pulse oximeter is applied to a thin part of the newborn's body and monitors percent saturation by sending two different wavelengths of light through the tissue and measuring with a photodetector. The percent saturation value indicates the percentage of hemoglobin sites occupied by oxygen in the newborn's blood, with normal values ranging from 95-100%. Lower percentages indicate hypoxemia, or low blood oxygen, and may necessitate adjustments in the oxygen provided during resuscitation.