The action that the nurse has to take if the infant is breathing satisfactorily but appears dusky would be: Check the infant's oxygen saturation rate.
The ratio of hemoglobin that is currently bound to oxygen to that that is still unbound is known as oxygen saturation.
Your blood's ability to provide enough oxygen to your organs and tissues, which depend on it to function, is compromised if your oxygen levels are insufficient (hypoxia). If this continues over time, it could harm your heart or brain (for instance, with nocturnal hypoxemia caused by sleep apnea). Hypoxemia in its acute forms can be lethal.
Read more on oxygen here: https://brainly.com/question/26073928
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