2019
DOI: 10.4187/respcare.06780
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Ultrasonographic Assessment of Passive Cephalic Excursion of Diaphragm During Cough Expiration Predicts Cough Peak Flow in Healthy Adults

Abstract: BACKGROUND: Evaluation of cough strength is clinically important, especially for patients with neuromuscular disorders and before extubation of mechanically ventilated patients. The pressure gradient between the airway and thoracoabdominal cavities during the cough expiratory phase generates cough flow and passive cephalic movement of the diaphragm. We hypothesized that passive diaphragmatic cephalic excursion, peak velocity, or both during cough expiration might predict cough peak flow (CPF). This physiologic… Show more

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Cited by 5 publications
(12 citation statements)
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“…Our results suggest that cough inspiratory volume is important in generating adequate CPF and that PCED is therefore closely associated with CPF. The coefficients in the equation for predicting CPF with PCED in patients with endotracheal tubes in this study were significantly different from those for healthy adults [15], mostly because of the absence of glottic closure secondary to endotracheal tubes and the consequent absence of a "compressive phase" before cough expiration.…”
Section: Discussioncontrasting
confidence: 76%
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“…Our results suggest that cough inspiratory volume is important in generating adequate CPF and that PCED is therefore closely associated with CPF. The coefficients in the equation for predicting CPF with PCED in patients with endotracheal tubes in this study were significantly different from those for healthy adults [15], mostly because of the absence of glottic closure secondary to endotracheal tubes and the consequent absence of a "compressive phase" before cough expiration.…”
Section: Discussioncontrasting
confidence: 76%
“…A CX50 ultrasound device (Philips, The Netherlands) was used to assess ultrasonographic indices of the diaphragm with a sector transducer (3.5 MHz). The transducer was positioned on the abdominal wall just below the lowest right rib, between the midaxillary line and mammillary line in the longitudinal scanning plane to the cephalic direction, with the liver as an acoustic window [12][13][14][15]. The angle of the transducer was adjusted so that the ultrasound beam was perpendicular to the posterior third of the right hemidiaphragm [16].…”
Section: Observations and Measurementsmentioning
confidence: 99%
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