níveis de retinol no leite materno ao início e final da mamada foremilk and hindmilk retinol levels

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ID: 192062
2004
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Abstract
OBJETIVO: Determinar os níveis de retinol no leite materno ao início e ao final da mamada. MÉTODOS: Em 2003, foram entrevistadas 30 nutrizes atendidas na Maternidade Escola Januário Cicco, Estado do Rio Grande do Norte, Brasil, entre 24 horas e 15 dias após o parto. A coleta de leite foi realizada no período da tarde, por expressão manual de uma mama reservada 2 horas antes, sendo retirados 4 mL de leite (2 mL ao início e 2 mL ao fim da mamada). O retinol foi determinado por cromatografia líquida de alta eficiência. Para a análise estatística utilizou-se o teste t de Student. RESULTADOS: As concentrações médias de retinol nas amostras de leite coletadas ao início e ao fim de uma mesma mamada foram 69,3 ± 41,4 µg/100 mL e 111,6 ± 79,2 µg/100mL, respectivamente, e foram estatisticamente diferentes (P = 0,012). CONCLUSÃO: Os resultados sugerem que o leite ao final da mamada proporciona maior ingestão de vitamina A. Assim, é importante orientar as mães a não interromperem as mamadas e a não limitarem a expressão manual apenas ao leite inicial. Além disso, é importante padronizar o momento da coleta de leite para permitir a comparação entre resultados de diferentes estudos sobre esse tema.
OBJECTIVE: To determine retinol levels in breast milk at the beginning and at the end of a feeding. METHODS: In 2003, 30 breastfeeding women receiving care at the Januário Cicco Maternity School, in the city of Natal, Rio Grande do Norte, Brazil, were interviewed between 24 hours and 15 days after delivery. A four mL sample of breast milk was expressed manually (2 mL at the beginning and 2 mL at the end of the feeding) in the afternoon, two hours after the preceding feeding. Retinol levels were determined by high performance liquid chromatography. Student's t test was used for statistical analysis. RESULTS: The mean retinol concentrations in the breast milk samples collected at the beginning and at the end of the same feeding were 69.3 ± 41.4 µg/100 mL and 111.6 ± 79.2 µg/100 mL, respectively; the mean concentrations were statistically different (P = 0.012). CONCLUSION: Our results suggest that hindmilk provides a higher intake of vitamin A. Therefore, it is important to guide mothers to not limit the baby's time at the breast and to avoid expressing only foremilk. In addition, it is important to standardize the time of breast milk collection in order to allow comparisons between the results of different studies on this topic.
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Authors Karla Danielly da Silva Ribeiro, Roberto Dimenstein
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Journal communications on pure and applied analysis
Year 2004
DOI
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URL
http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892004000700003
Keywords
tropical medicinepublic aspects of medicine aleitamento materno

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