1999
DOI: 10.1007/s001340050955
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Flow-volume curves as measurement of respiratory mechanics during ventilatory support: the effect of the exhalation valve

Abstract: In mechanically ventilated patients, the exhalation valve causes a significant reduction in peak flow, but does not affect the SF50. This study further suggests that the second part of the expiratory flow-volume curve can be used to estimate patients' respiratory mechanics during ventilatory support.

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Cited by 11 publications
(18 citation statements)
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“…The angle of the slope of the EFV curve is closely related to the single exponential time constant but is less sensitive to change in flow than the time constant [12]. The values of the angle measured in the first quartile of present patients were very close to those obtained in 9 COPD patients by Lourens et al [12] and in 27 mechanically ventilated patients by Aerts et al [11].…”
Section: Discussionsupporting
confidence: 73%
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“…The angle of the slope of the EFV curve is closely related to the single exponential time constant but is less sensitive to change in flow than the time constant [12]. The values of the angle measured in the first quartile of present patients were very close to those obtained in 9 COPD patients by Lourens et al [12] and in 27 mechanically ventilated patients by Aerts et al [11].…”
Section: Discussionsupporting
confidence: 73%
“…Of note, it is not affected by the exhalation valve [12] that can differ from one ICU ventilator to the other, as in the present study. It is also very reproducible from breath to breath in passively mechanically ventilated patients and is independent of the tidal volume [11], a finding which was confirmed in the present study.…”
Section: Discussionsupporting
confidence: 55%
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