Which is a risk factor of necrotizing enterocolitis in the preterm infant?

Which is a risk factor of necrotizing enterocolitis in the preterm infant?

• A. Polycythemia
• B. Hypoglycemia
• C. Ventilatory support
• D. Antibiotic administration

Answer: (A)

Necrotizing enterocolitis in preterm infants is driven by factors that impair gut perfusion and damage the intestinal lining. Polycythemia increases the viscosity of the blood, which can slow flow through the gut's tiny vessels. With the immature autoregulation of the preterm gut, reduced blood flow can injure the mucosal barrier, making the intestine more vulnerable to bacterial invasion and inflammation that leads to NEC. Hypoglycemia is a metabolic issue common in prematurity but does not directly cause NEC. Needing ventilatory support indicates that the infant is sicker, a correlate of increased NEC risk, but the support itself isn’t the mechanism. Antibiotic administration can alter gut microbiota and influence NEC risk indirectly, but it isn’t considered a direct risk factor in the classic list of NEC risks.

Necrotizing enterocolitis in preterm infants is driven by factors that impair gut perfusion and damage the intestinal lining. Polycythemia increases the viscosity of the blood, which can slow flow through the gut's tiny vessels. With the immature autoregulation of the preterm gut, reduced blood flow can injure the mucosal barrier, making the intestine more vulnerable to bacterial invasion and inflammation that leads to NEC.

Hypoglycemia is a metabolic issue common in prematurity but does not directly cause NEC. Needing ventilatory support indicates that the infant is sicker, a correlate of increased NEC risk, but the support itself isn’t the mechanism. Antibiotic administration can alter gut microbiota and influence NEC risk indirectly, but it isn’t considered a direct risk factor in the classic list of NEC risks.