Spirometry is a basic test for assessing pulmonary function. This test is largely used nowadays, because of its low cost and acceptable reproducibility. Its feasibility has been shown even in 2 to 6 year old children. Considering the importance of applying standardized techniques in spirometry, a committee of specialists on pulmonary function from Chilean Respiratory Society, published in 2006 a procedures manual on spirometry. By 2014 new spirometric reference equations for healthy Chilean adults were published and more recently in 2017, the American Thoracic Society and the European Respiratory Society have published recommendations for a standardized pulmonary function report. The aim of this manual is to report international norms performing spirometry, in order to promote their application in clinical and laboratory practice. In addition, this reviewed manual encloses newest concepts on spirometry in preschool children, reference values, and a general assent way for interpreting and reporting spirometric values at clinical and at laboratory work is proposed.
Our results indicate that adding theophylline to standard treatment with inhaled bronchodilators provides additional benefits in stable COPD patients by reducing dynamic pulmonary hyperinflation, improving exercise tolerance, dyspnea and QoL.
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