At the moment of birth, the most objective method of assessing a newborn’s metabolic condition is by analyzing umbilical cord blood gas. To be specific, arterial cord pH and base deficit can determine perinatal hypoxia and be an insight into causes of fetal distress.
Umbilical cord blood gases are most likely interpreted in situations of high risk pregnancies when there are abnormal fetal heart rate patterns, when there is an intrapartum fever, emergent C-section for a fetal compromised, low Apgar scores (less than 3) or when there are multiple fetal births.
There are three most common causes of neonates hypoxia or asphyxia, which are when the mother is oxygen compromised, when there is preeclampsia, chronic hypertension, hypotension, hypovolemia or cyanotic heart disease. Another type of condition that causes hypoxia or asphyxia is when the oxygen flow from the placenta to the fetus is obstructed or impaired. This could be caused by a placental abruption, a cord prolapse, or repetitive cord blockage.