Using the forced oscillation technique to evaluate respiratory resistance in individuals with silicosis
Jornal Brasileiro de Pneumologia, ISSN: 1806-3713, Vol: 32, Issue: 3, Page: 213-220
2006
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Article Description
Objective: To evaluate the resistance values obtained through the use of the forced oscillation technique in patients with varying degrees of airway obstruction resulting from silicosis. Methods: A total of 40 never-smoking volunteers were analyzed: 10 were healthy subjects with no history of pulmonary disease or silica exposure, and 30 had silicosis. The forced oscillation technique was used to examine the subjects, and spirometry was used as a reference in order to classify the obstruction by degree. This classification resulted in five groups: control (n = 10); normal exam, composed of individuals diagnosed clinically and radiologically with silicosis but presenting normal spirometry results (n = 7); mild obstruction (n = 10); moderate obstruction (n = 8); and severe obstruction (n = 5). Results: The reduction observed in the spirometric values corresponded to a significant increase in the total respiratory resistance (p < 0.001), as well as in airway resistance (p < 0.003). A significant reduction in ventilation homogeneity was also observed (p < 0.004). Conclusion: In individuals with silicosis, the additional respiratory resistance-related data obtained through the use of the forced oscillation technique can complement spirometric data. Therefore, the forced oscillation technique presents great potential for the analysis of such patients.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33845804301&origin=inward; http://dx.doi.org/10.1590/s1806-37132006000300007; http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132006000300007&lng=pt&tlng=pt; http://www.scielo.br/pdf/jbpneu/v32n3/a07v32n3.pdf; http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132006000300007&lng=en&tlng=en; http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1806-37132006000300007&lng=en&tlng=en; http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132006000300007; http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1806-37132006000300007; https://dx.doi.org/10.1590/s1806-37132006000300007; https://www.scielo.br/j/jbpneu/a/mKTwDbM6jc7XQzSzYSBBCBq/?lang=pt
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