Which of the following is NOT a sign of hypovolemia in newborns?

Persistent acrocyanosis is often observed in newborns, especially in the first few hours after birth, and is typically considered a normal condition. Acrocyanosis refers to the bluish discoloration of the hands and feet, which occurs due to inadequate circulation in these areas while the central circulation remains stable. In newborns, this can be a common physiological response as their circulatory system transitions after delivery.

In contrast, persistent pallor can indicate inadequate blood volume or perfusion, which is a sign of hypovolemia. Weak central pulses and persistent bradycardia are both signs that denote potential cardiovascular compromise that often accompanies hypovolemia, as the body responds to diminished blood volume by causing changes in heart rate and pulse strength.

Understanding the significance of these signs helps in identifying and managing conditions like hypovolemia in newborns effectively, while recognizing that acrocyanosis is generally a benign finding allows clinicians to avoid unnecessary interventions.