Abstract
Objective: To determinate by the OEP the effects of deep inspiration on physiological variables and thoracic-abdominal asynchrony in patients with COPD, compared with healthy individuals matched for age. Methods: Ten patients with COPD and 12 healthy individuals were evaluated using OEP during deep inspiration. TAA was estimated using the phase angle in a Lissajous figure for three consecutive and consistent respiratory cycles. Results: There was significant difference (p<0.01) on the phase angle between the abdominal rib cage (RCa) and the abdomen (AB) in COPD patients compared to the control (-20.7°±26.3° vs -0.3°±8.8°). Greater compartmental contribution to the tidal volume was found in the pulmonary rib cage (RCp) in both the control group (p<0.009) and the COPD group (p<0.003). The degree of obstruction was not correlated with TAA between the different compartments. Conclusion: During deep inspiration for assincroniatoracoabdominal in patients with COPD in relation to healthy, not sort of adding then to improves the respiratory pattern in this group of patients and the degree of airway obstruction of these patients correlates with the presence ATA.
Highlights
In cases of chronic obstructive pulmonary disease (COPD), airflow limitation is not completely reversible
Optoelectronic plethysmography (OEP) is currently the main tool used for the study of thoraco-abdominal movements because it is non-invasive and highly accurate
The aim of this study was to verify the optoelectronic plethysmography (OEP) the effects of deep inspiration on physiological variables and thoracic-abdominal asynchrony in patients with COPD, compared with healthy individuals matched for age
Summary
In cases of chronic obstructive pulmonary disease (COPD), airflow limitation is not completely reversible. This limitation may influence these harmonious mechanisms and cause what is known as thoracoabdominal asynchrony (TAA) [1,2,3]. Thoraco-abdominal synchrony is defined by the coordinated expansion of the thoraco-abdominal compartments. This synchrony is the result of physiological mechanisms, including the coordinated action of the respiratory muscles [4,5], changes in transdiaphragmatic pressure during the respiratory cycle [3,4], and pulmonary vascular resistance and compliance [5,6]. Optoelectronic plethysmography (OEP) is currently the main tool used for the study of thoraco-abdominal movements because it is non-invasive and highly accurate
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