PE19.9 | Neonatal Thermal Care — Summary & Reflection

KEY TAKEAWAYS

Neonatal thermoregulation is physiologically vulnerable: neonates lose heat through evaporation (largest at birth), convection, radiation, and conduction (mnemonic CCRE) and produce heat via non-shivering thermogenesis (brown adipose tissue/UCP1) — they CANNOT shiver. Normal axillary temperature: 36.5–37.5°C. Hypothermia grades (WHO): mild 36.0–36.4°C, moderate 32–35.9°C, severe <32°C. Cold stress triggers a metabolic cascade: increased oxygen consumption → hypoglycaemia → metabolic acidosis → pulmonary vasoconstriction → hypoxia — explaining why hypothermia is dangerous beyond just temperature. The WHO Warm Chain (10 links) prevents hypothermia: warm room, immediate drying (most important link — eliminates evaporation), skin-to-skin, breastfeeding, delayed bathing, warm clothing, rooming-in, warm transport, warm resuscitation, training. Rewarming: mild = skin-to-skin; moderate = KMC or radiant warmer at 0.5°C/hour + blood glucose monitoring; severe = emergency NICU care. Hyperthermia in a neonate requires sepsis exclusion unless environmental cause is clear and confirmed by resolution with cooling.

REFLECT

Reflect on the WHO Warm Chain. Every single one of its 10 links addresses a physiological mechanism of heat loss — none of them are arbitrary. Understanding the physiology behind each link makes you a better advocate for these practices: you can explain to a nurse why the bath must be delayed, or to a mother why skin-to-skin matters, in terms that are scientifically defensible and clinically convincing. Think about what percentage of deliveries in your future practice will be in settings where at least one link of the Warm Chain is routinely broken — cold rooms, early baths, delayed skin-to-skin. What systemic change could you champion as a clinician or a public health advocate to close that gap? This is where individual clinical knowledge connects to population-level health outcomes.