Avaliação dos parâmetros espirométricos de pacientes submetidos à broncoscopia fl exível com anestesia local Evaluation of spirometric parameters in patients undergoing fl exible bronchoscopy with local anesthesia

Introduction: Flexible bronchoscopy (FB) is a diagnostic test of therapeutic potential often used in thoracic surgery services. Lack of knowledge about its true impact on lung function and possible complications still restrict its use in institutions of higher complexity. The aim of this study is to evaluate the changes in spirometry after conducting FB with local anesthesia and determine the safety of the method. Methods: A longitudinal prospective study of patients referred to FB in a university Hospital. The evaluation of patients focused on performing pulse oximetry and spirometry before and after completion of FB. Spirometry was performed by trained professional and in accordance with the recommendations of the Sociedade Brasileira de Pneumologia e Tisiologia (Brazilian Thoracic Association). The incidence of complications was also evaluated. Results: The sample consisted of 20 patients, most of whom males (55%). The mean age was 56.6 years, and 35% of the patients were smokers (mean 45.3 years/pack), 10% had asthma, and 15% had chronic obstructive pulmonary disease (COPD). There was a statistically signifi cant reduction in FEV1, FVC and PEF (respectively, 0.25 L, 0.44 L and 0.85 L/sec). The Tiffenaud Index remained at the standard level, with no signifi cant difference. There was also a signifi cant decrease in SpO 2 . There was no need for ventilatory support. Conclusion: There was a signifi cant reduction in lung function and hemoglobin saturation after completion of FB. However, these changes did not have a signifi cant clinical impact, confi rming the safety of the method.