All of the following are signs of hypoxemia in a newborn, EXCEPT?

In the context of hypoxemia in a newborn, identifying the signs is crucial for timely intervention. Cyanosis, lethargy, and unresponsiveness are all clear indicators that the newborn may not be receiving enough oxygen, reflecting insufficient oxygenation of the blood.

Cyanosis is characterized by a bluish discoloration of the skin, particularly noticeable in the lips, face, and extremities, signaling a lack of oxygen. Lethargy refers to diminished responsiveness or alertness, often a direct result of inadequate oxygen supply. Unresponsiveness can range from mild to severe, indicating critical oxygen deprivation that affects the newborn’s ability to react or respond to stimuli.

Tachycardia, however, is an increased heart rate that is often a compensatory response to hypoxemia, as the body attempts to deliver more oxygen to tissues. It doesn't signify hypoxemia itself, but rather a physiological response to it. In instances of hypoxemia, it is not uncommon for heart rate to increase initially. Therefore, tachycardia is not a direct sign of hypoxemia, distinguishing it from the other mentioned signs. Understanding these concepts helps in monitoring and managing newborns effectively, alerting caregivers to signs of potential respiratory distress