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Archivos de Pediatría del Uruguay

On-line version ISSN 1688-1249

Abstract

MUINO, Adriana et al. Aproximación a los valores de referencia de la capacidad residual funcional en una población de niños y adolescentes. Arch. Pediatr. Urug. [online]. 2013, vol.84, suppl.1, pp.18-27. ISSN 1688-1249.

Introduction: for the interpretation of pulmonary function tests it is useful the reference values (normal population) that are compared with those measured for detecting functional disturbance. There are discrepancies between the equations in pediatrics: a limited number of participants, not available or not comparable because they are performed with other methods. Objectives: measure the CRF in controlled asthmatic children who had normal spirometry. Analyze by age and size dispersion measures of functional variables (volumes and lung capacities). Methods: cross-sectional study, including controlled asthmatic children and adolescents (clinical-functional). We carried Functional Residual Capacity (FRC) by nitrogen washout technique (N2) (Easy One Pro Lab ®) under standardized conditions. We analyze the data of the functional variables stratified by quartiles of height. Results: we studied 86 children, 49 men (57%), mean age 11,01 ± 2,46 years. Prevalence of overweight and obesity was 37,21%. A linear relationship exists between the CRF and the height: for each 1 centimeter increase in height there CRF increased by 0,23 liters (95% from 0,19 to 0,27 L) p = 0,000. Conclusions: the CRF is related to body size (height), so it is very important to measure these variables from early lung development through adolescence, to understand in evolutionary terms the progression of different respiratory diseases. These data are limited to a population of asthmatics, however, are a start in the interpretation of results, probably more representative than those available in the literature.

Keywords : LUNG VOLUME MEASUREMENTS; REFERENCE VALUES; RESIDUAL VOLUME.

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