Long-term change in reactance by forced oscillation technique correlates with FEV1 decline in moderate COPD patients
نویسندگان
چکیده
منابع مشابه
Association between respiratory impedance measured by forced oscillation technique and exacerbations in patients with COPD
Background It is well known that increased airflow limitation as measured by spirometry is associated with the risk of exacerbation in patients with COPD. The forced oscillation technique (FOT) is a noninvasive method used to assess respiratory impedance (resistance and reactance) with minimal patient cooperation required. The clinical utility of the FOT in assessing the risk of exacerbations o...
متن کاملEstimation of random errors in respiratory resistance and reactance measured by the forced oscillation technique.
The forced oscillation technique (FOT) allows the measurement of respiratory resistance (Rrs) and reactance (Xrs) and their associated coherence (gamma2). To avoid unreliable data, it is usual to reject Rrs and Xrs measurements with a gamma2 <0.95. This procedure makes it difficult to obtain acceptable data at the lowest frequencies of interest. The aim of this study was to derive expressions t...
متن کاملPredictors of expiratory flow limitation measured by forced oscillation technique in COPD
BACKGROUND Expiratory flow limitation (EFL) during tidal breathing is common in patients with severe COPD, and a major determinant of dynamic hyperinflation and exercise limitation. EFL can be measured by the forced oscillation technique (FOT); however, the relevance to clinical parameters is not fully understood. We hypothesized that emphysema extent and pulmonary function would contribute ind...
متن کاملAdverse health consequences in COPD patients with rapid decline in FEV1 - evidence from the UPLIFT trial
BACKGROUND The rate of decline in forced expiratory volume in 1 second (FEV1) is representative of the natural history of COPD. Sparse information exists regarding the associations between the magnitude of annualised loss of FEV1 with other endpoints. METHODS Retrospective analysis of UPLIFT® trial (four-year, randomized, double-blind, placebo-controlled trial of tiotropium 18 μg daily in chr...
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ژورنال
عنوان ژورنال: European Respiratory Journal
سال: 2017
ISSN: 0903-1936,1399-3003
DOI: 10.1183/13993003.01534-2016