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Previous issue date: 2011-03-15 / Background: Alterations to lung development in preterm infants is characterized by decreased alveolarization and dysmorphic vasculature. Has been considered the possibility that changes associated with perinatal factors decrease lung volume and quality of ventilation distribution. Objective: To measure the functional residual capacity and heterogeneity of ventilation in preterm infants and to study their association with perinatal factors. Methods: This is a cross-sectional study involving preterm infants corrected age of 8 to 13 months. Were measured at functional residual capacity (FRC) and ventilation inhomogeneity using the lung clearance index (LCI) by the technique multiple breath inert gas washout (MBW) with sulfur hexafluoride (SF6) to 4%, with sedation, using a ultrasonic flowmeter. The statistical analysis used the Student t test and linear regression. Results: We studied 28 preterm infants with gestational age (GA) (mean ?SD) of 31? 2.9 weeks, with of 7.88 ?0.6 and equal to 19.7 ?4.3 ml.kg-1. Positive correlation were found between LCI and males and intrauterine growth restriction (p <0.05). Premature rupture of membranes were negative correlation with LCI (p <0.05). Conclusion: The results suggest that this sample, male sex, the IUGR and premature rupture of membranes affect LCI in preterm infants. The FRC was not associated with prematurity or other pre-natal and post-natal factors. / Introdu??o: A altera??o no desenvolvimento pulmonar em prematuros ? caracterizada por redu??o na alveolariza??o e vasculariza??o dism?rfica. Tem sido considerada a possibilidade de que altera??es associadas a fatores perinatais diminuam volumes pulmonares e a qualidade da distribui??o da ventila??o. Objetivo: Medir a heterogeneidade da ventila??o e a capacidade residual funcional em prematuros e estudar suas associa??es com fatores perinatais. M?todos: Este ? um estudo transversal envolvendo prematuros com idade corrigida de 8 a 13 meses. Foram medidas a capacidade residual funcional (CRF) e a ventila??o heterog?nea utilizando o lung clearence ?ndex (LCI) atrav?s da t?cnica multiple breath inert gas washout (MBW) com hexafluoreto de enxofre (SF6) a 4%, com seda??o, usando um medidor de fluxo ultrass?nico. Na an?lise estat?stica foi usado o teste t de Student e a regress?o linear. Resultados: Foram estudados 28 prematuros com idade gestacional (IG) (m?dia?dp) de 31?2,9 semanas, com LCI de 7,88?0,6 e CRF igual a 19,7?4,3 ml.kg-1. Houve correla??o positiva entre LCI e sexo masculino e restri??o do crescimento intrauterino (RCIU) (p<0,05). Houve correla??o negativa entre LCI e ruptura prematura das membranas (ruprema) (p<0,05). Conclus?o: Os resultados encontrados sugerem, que nesta amostra, o sexo masculino, o RCIU e a ruprema influenciaram o LCI em prematuros. A CRF n?o foi associada ? prematuridade ou outros fatores perinatais.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/1394 |
| Date | 15 March 2011 |
| Creators | Silva, Silvia Anadir Medeiros da |
| Contributors | Jones, Marcus Herbert |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Medicina/Pediatria e Sa?de da Crian?a, PUCRS, BR, Faculdade de Medicina |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 3098206005268432148, 500, 600, -8624664729441623247 |
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