What fetal arterial pH level is typically used to determine acidosis in newborns?

A fetal arterial pH level of 7.10 is typically used to indicate acidosis in newborns. Normal fetal arterial pH values range from approximately 7.20 to 7.40. When the pH level falls below 7.20, especially at around 7.10, it signals the potential presence of metabolic or respiratory acidosis. This lower pH indicates that the blood is becoming more acidic, which may occur due to insufficient oxygen supply (hypoxia) or other complications during labor and delivery.

Recognizing these pH levels is crucial for clinicians as it helps in assessing the well-being of the fetus and determining the need for immediate intervention. Monitoring pH levels is a vital part of fetal heart monitoring and ensures prompt care to improve outcomes for newborns.