H Balasubramanian et al. J Pediatr 2026;298:115235. Effect of Extended Infusion Versus Intermittent Bolus Feedings on Hospital Weight Gain in Extremely Low Birth Weight Infants Born at <29 Weeks of Gestation: A Randomized Noninferiority Clinical Trial
Methods: The authors randomized 132 infants (infusion, n = 68; bolus, n = 64). The median gestational age and birth weight were 26.4 ± 1.2 weeks and 752 ± 140 g. Bolus feedings were provided every 2 hours through an orogastric tube over a duration of 10-20 minutes by gravity. Drip feeds: over a 24-hour time period, milk was delivered in 4 infusion cycles. Each infusion cycle comprised of 5 hours of continuous milk infusion followed by an hour of feeding break.
Key findings:
- The median time to full enteral feedings was similar: infusion: 10 days [IQR: 7-12]; bolus: 9 days [IQR: 7-12], P = .82
- The mean (SD) rate of weight gain at discharge was similar: infusion 15.3 ± 2.6 g/kg/day vs bolus 15.7 ± 2.8 g/kg/day
- The infusion group had significantly fewer days of feeding interruptions (6.7 days [5.6-8.1] vs 8.7 [7.4-10.1] per 100 patient days, P = .03) in the first 28 days
- Duration of hospitalization and morbidities were similar in study groups

The dashed line represents the median time to full enteral feeds in both groups (10 days).

Discussion Points:
- “Feeding intervals may play an important role in nutrient absorption and assimilation in neonates. An in vitro model of simulated feeding of thawed unprocessed donor human milk indicated that continuous feeding resulted in 40%, 35%, and 20% losses of fat, calcium, and phosphorus content, respectively, compared with 6%, 9%, and 7% losses of the same macronutrients when bolus fed. Periodic manual agitation of infusion pumps, use of inverted or vertically oriented infusion systems, and infusion rates of 5 mL/hour have been identified as important approaches (level II evidence) to combat fat losses from milk infusions”
- There were feeding interruptions in this study. “In our study, consistent with current feeding practices, infants were exclusively human milk fed until 33 weeks of gestation and feeding decisions were not affected by gastric residual volumes.”
My take (borrowed from the authors): “Extended infusion feedings were noninferior to intermittent bolus feedings for hospital weight gain in infants born with ELBW.”
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