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ISSN 0187-5337 (Print)
Instituto Nacional de Perinatología

2012, Number 3

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Perinatol Reprod Hum 2012; 26 (3)

Body weight loss and postnatal growth velocity in premature ≤ 1,500 g during their hospital stay in a tertiary level of care

Zamorano-Jiménez CA, Guzmán-Bárcenas J, Baptista-González HA, Fernández-Carrocera LA

Language: Spanish
References: 22
Page: 187-193
PDF size: 149.22 Kb.


ABSTRACT

Introduction: Weight loss in the first five to seven days of life and growth in preterm infants depends on many factors. In the first week of life, there is an inverse association between gestational age and loss of body weight; with very low birth weight and low gestational age is more difficult to achieve adequate growth velocity. The objectives were to determine the loss of body weight in infants less than 1,500 g calculate, the absolute growth velocity (g/day) and relative (g/kg/day), and correlate the percentage weight loss and gestational age. Methods: Observational, longitudinal and retrospective study of preterm neonates ≤ 1,500 g. The variables analyzed were at birth: weight, gestational age, length, and cephalic circumference, then monitoring the weight per day, and length and cephalic circumference, per week. It was calculated maximum weight loss and growth velocity. For maximum weight loss and gestational age, Pearson correlation was used. Results: Cases of 101 infants, with birth weight 1,190.7 ± 204.5 g and gestational age of 30.2 ± 2.3 were analyzed, 42 neonates (41.6%) had low birth weight for gestational age and 59 (58.4%) adequate weight for gestational age; the maximum average of weight loss was 8.6% ± 4.5; loss was presented in day 4.2 ± 1.7 and weight regain was presented on day 10.9 ± 5.2. Growth velocity was 19.3 ± 5.4 g/day and 16.9 ± 5.4 g/kg/day, an inverse negative correlation was observed between weight loss and gestational age (r = -0.422, p ‹ 0.0001). Conclusions: The absolute growth velocity (g/day) and relative (g/kg/day) are useful in assess the nutritional condition in premature infants, and gives the opportunity to clinicians detect suboptimal growth velocity patterns and make adequate interventions. An inverse negative correlation was observed between weight loss and gestational age.


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