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Improved Outcomes in Preterm Infants Fed a Nonacidified Liquid Human Milk Fortifier: A Prospective Randomized
Richard J Schanler1, Sharon L Groh-Wargo2, Bridget Barrett-Reis3
1Neonatal-Perinatal Medicine, Cohen Children's Medical Center, New Hyde Park, NY.
Insights
Acidified liquid human milk fortifier in preterm infants led to poorer initial weight gain and increased feeding intolerance, including vomiting and metabolic acidosis. Nonacidified fortifier showed better early growth and tolerance in this vulnerable population.
Area of Science:
- Neonatal Nutrition
- Pediatric Gastroenterology
- Clinical Nutrition
Background:
- Preterm infants require specialized nutrition for optimal growth and development.
- Human milk fortification is standard practice, but the form of fortifier may impact outcomes.
- Acidified liquid human milk fortifiers are used, but their clinical effects require comparison.
Purpose of the Study:
- To compare the effects of acidified versus nonacidified liquid human milk fortifier on growth and feeding tolerance in preterm infants.
- To evaluate clinical and biochemical outcomes associated with different human milk fortifier types.
Main Methods:
- A prospective, controlled, parallel, multicenter study involving 164 preterm infants (≤32 weeks gestation).
- Infants were randomized to receive either acidified or nonacidified liquid human milk fortifier from day 1 to day 29 or hospital discharge.
- Outcomes included weight gain, feeding tolerance (vomiting, gastric residuals, abdominal distension), and biochemical markers (blood urea nitrogen, metabolic acidosis).
Main Results:
- No significant difference in overall weight gain (days 1-29) between groups.
- Nonacidified fortifier group showed significantly greater weight gain during days 1-15 (17.9 vs 15.2 g/kg/day; P=.001).
- Acidified fortifier group experienced higher rates of vomiting (10.3% vs 2.4%), gastric residuals (12.8% vs 3.7%), abdominal distension (14.0% vs 1.7%), and metabolic acidosis (27% vs 5%).
Conclusions:
- Acidified liquid human milk fortifier was associated with poorer initial weight gain and increased feeding intolerance in preterm infants.
- Higher rates of metabolic acidosis were observed with acidified fortifier use.
- Nonacidified liquid human milk fortifier appears to be a better option for early growth and tolerance in this population.
Objective:
To compare growth, feeding tolerance, and clinical and biochemical evaluations in human milk-fed preterm infants randomized to receive either an acidified or a nonacidified liquid human milk fortifier.
Study Design:
This prospective, controlled, parallel, multicenter growth and tolerance study included 164 preterm infants (≤32 weeks of gestation, birth weight 700-1500 g) who were randomized to acidified or nonacidified liquid human milk fortifier from study day 1, the first day of fortification, through study day 29 or until hospital discharge.
Results:
There was no difference in the primary outcome of weight gain from study days 1 to 29 (acidified liquid human milk fortifier, 16.4 ± 0.4 g/kg/day; nonacidified liquid human milk fortifier, 16.9 ± 0.4 g/kg/day). However, in both the intention-to-treat and the protocol evaluable analyses, infants fed nonacidified liquid human milk fortifier had significantly greater weight gain from study days 1 to 15 (17.9 g/kg/day vs 15.2 g/kg/day; P = .001). Infants fed with acidified liquid human milk fortifier received more protein (4.26 vs g/kg/day 4.11 g/kg/day, P = .0099) yet had lower blood urea nitrogen values (P = .010). The group fed acidified liquid human milk fortifier had more vomiting (10.3% vs 2.4%; P = .018), gastric residuals (12.8% vs 3.7%; P = .022), and metabolic acidosis (27% vs 5%; P < .001) in the intention-to-treat analysis and more abdominal distension (14.0% vs 1.7%; P = .015) in the protocol evaluable analysis.
Conclusions:
Infants fed an acidified liquid human milk fortifier had higher rates of metabolic acidosis and poor feeding tolerance compared with infants fed a nonacidified liquid human milk fortifier. Initial weight gain was poorer with the acidified liquid human milk fortifier.
Trial Registration:
ClinicalTrials.gov: NCT02307760.
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