Pediatric Anesthesia Care and Perioperative Management
Framing the case
Perioperative management of children is organized around age-specific risk: the neonate with immature hepatic and renal clearance, the infant with a large surface-area-to-mass ratio and rapid heat loss, and the older child with separation anxiety and postoperative nausea. Candidates must be able to build a plan that sequences NPO status, premedication, induction technique, monitoring, fluid and glucose strategy, temperature control, and discharge criteria.
Concepts to master
- NPO intervals follow liberalized fasting guidance: clear liquids 2 h, breast milk 4 h, formula/light meal 6 h; prolonged fasting is itself a harm (hypoglycemia, dehydration, irritability).
- Fluid therapy: maintenance by the 4-2-1 rule; isotonic crystalloid with dextrose-free solutions for most cases, with glucose-containing fluid reserved for neonates and children at risk of hypoglycemia.
- Thermoregulation: forced-air warming, warmed fluids, raised ambient temperature; infants lose heat by evaporation and radiation disproportionately.
- Emergence delirium versus pain versus hypoxia: distinguish by timing, consolability, and response to analgesia.
- PONU prophylaxis: multimodal analgesia, ondansetron ± dexamethasone in at-risk children.
Traps
Questions often present a child who is "NPO since midnight" and ask for the next step - the answer is usually to recognize unnecessary fasting and proceed, not to cancel. Another trap is attributing post-induction hypotension to anesthesia when hypovolemia from fasting is the cause. Do not apply adult fasting or adult fluid rules to infants.
Rule of thumb
If a healthy child has had clear liquids within 2 h or a light meal within 6 h, delay elective cases rather than induce; but never starve a child overnight for an afternoon case.
Worked example
A 3-year-old (14 kg) for tympanostomy at 10:00 has had apple juice at 07:30 and toast at 06:00. Clear liquids are >2 h and solids >4 h - proceed. Maintenance ≈ 4×10 + 2×4 = 48 mL/h; give a 10–20 mL/kg balanced crystalloid bolus for fasting deficit and warm the room.