PE19.4 | Birth Asphyxia — Summary & Reflection

KEY TAKEAWAYS

Birth asphyxia is the failure of adequate perinatal gas exchange leading to hypoxia, hypercarbia, and metabolic acidosis. Risk factors span antepartum (placental insufficiency, pre-eclampsia, cord accidents) and intrapartum (cord prolapse, prolonged labour, fetal bradycardia) categories. The brain injury of HIE occurs in two phases: primary energy failure (during asphyxia) and secondary energy failure (hours 6–72 via excitotoxicity, oxidative stress, and apoptosis), with a latent therapeutic window of 6 hours between them. Sarnat staging classifies HIE severity — Stage I (mild, hyperalert, no seizures, full recovery), Stage II (moderate, lethargy, hypotonia, seizures, abnormal EEG), Stage III (severe, coma, flaccidity, absent brainstem reflexes, flat EEG). Therapeutic hypothermia (33–34°C for 72 hours) is indicated for Sarnat II/III in neonates ≥36 weeks if initiated within 6 hours of birth; it reduces death and major neurodisability by 25–30%. Supportive management includes tight glucose control, fluid restriction (SIADH), seizure treatment with phenobarbitone 20 mg/kg IV, and respiratory/cardiovascular support. The 6-hour window is the most clinically critical time threshold — it must be part of every delivery room handover assessment.

REFLECT

A term neonate is resuscitated for 12 minutes in a district hospital 70 km from a NICU equipped for therapeutic hypothermia. The baby is now 2 hours old, showing signs of Sarnat Stage II HIE. The neonatal window for cooling closes in 4 hours. The transport team has a basic transport incubator without servo-cooling. What improvised strategies could preserve or extend the therapeutic window during the 90-minute transfer? Now consider the systems dimension: why do many Indian district hospitals still lack cooling equipment? What policy changes, equipment investments, or outreach training programmes would make a measurable impact on HIE outcomes at the population level? If you were the district health officer, what is the single most cost-effective intervention you would prioritise?