## Pediatric Preoperative Fasting Guidelines **Key Point:** Fasting guidelines for infants and children are based on gastric emptying time and the type of ingested substance. Breast milk is absorbed more readily than formula, allowing a shorter fasting interval. ### Fasting Duration in Pediatric Patients | Substance | Fasting Duration | | --- | --- | | Clear liquids | 2 hours (any age) | | Breast milk | 4 hours | | Infant formula | 6 hours | | Solid food / regular meals | 6–8 hours | **High-Yield:** Breast milk requires **4 hours** of fasting in both children and adults. This is shorter than formula (6 hours) because breast milk has a faster gastric emptying time due to its composition and lower fat content. **Clinical Pearl:** In pediatric practice, allowing breast milk up to 4 hours before surgery reduces parental anxiety and maintains infant hydration better than formula, while maintaining equivalent aspiration safety. **Mnemonic:** **BF-4, FF-6** — Breast milk Fasting = 4 hours; Formula Fasting = 6 hours. **Warning:** Do not confuse breast milk (4 hours) with infant formula (6 hours). The difference reflects gastric emptying physiology, not arbitrary rounding.
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