[The breathing pattern and inspiratory drive in chronic obstructive pulmonary disease].
Quantitative analysis of breathing pattern in 20 cases of COPD patients and 15 normal persons showed a significant correlation between values of VT/TI and P0.1; VT/TI value may be used clinically as an index of inspiratory drive. The elevation of VT/TI values of COPD patients at the end of high CO2-rebreathing denoted the sensitivity of their respiratory center is still preserved. However, the impairment of respiratory muscle endurance in hypercapnic COPD patients under rebreathing stress showed a prolongation of TI/TT.
Wang
J
J
First Hospital, Chongqing University of Medical Sciences.
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D006935:Hypercapnia / Q000209:etiology / Q000503:physiopathology; D008173:Lung Diseases, Obstructive / Q000150:complications / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D012119:Respiration; D012129:Respiratory Function Tests; D012132:Respiratory Muscles / Q000503:physiopathology; D013990:Tidal Volume