The presence of certain findings in a neonate can indicate the level of asphyxia experienced during the intrapartum period.
Key defining characteristics: metabolic acidosis at delivery, as indicated by an umbilical artery base deficit (negative base excess) > 12 mmol/L
Parameters during the first 5 days after delivery:
(2) cardiovascular, respiratory and/or renal complications
central nervous system
profound lethargy or abnormal tone
coma, or abnormal tone and seizures
bradycardia or tachycardia
hypotension or hypertension
abnormal ECG or echocardiographic findings
supplementary oxygen required
continuous positive airway pressure, or ventilation required for < 24 hours
mechanical ventilation required for >= 24 hours
elevated serum creatinine > 100 µmol/L (> 1.13 mg/dL)
anuria, or oliguria
• Bradycardia indicates pulse <= 100 beats per minute; tachycardia a pulse >= 180 beats per minute.
• Blood pressure changes were based on the 95% confidence limits for blood pressure in neonates.
• Oliguria occurs when urine output is < 1 mL per kg per hour.
Complications in Other Organs
Classification of Asphyxia
minor to moderate
minor to severe
To read more or access our algorithms and calculators, please log in or register.
Specialty: Pedatrics, Neurology