Pattern of lung emptying and expiratory resistance in mechanically ventilated patients with chronic obstructive pulmonary disease

Abstract

Pattern of lung emptying and expiratory resistance in mechanically ventilated patients with chronic obstructive pulmonary disease Intensive Care Med (2004) 30:1311-1318 In Tables 4 and 5, symbols and values were incorrectly rendered in the online PDF version and in print. Only in the online HTML version were the tables reproduced correctly. The tables should appear as follows:

Effect of Albuterol on Expiratory Resistance in Mechanically Ventilated Patients

“…We measured flow, volume, airway pressure, and tracheal pressure at the airway opening, as previously described. 6,7 All inhaled bronchodilators were withheld for 6 hours before the study period. PEEP was zero during the study period.…”

“…The protocol for the evaluation of expiratory resistance and flow limitation includes 3 steps, previously described. 6,7 The airway is occluded at end-inspiration for 3 s (with the end-inspiratory hold button on the ventilator), then:…”

“…We assessed flow limitation by comparing the expiratory flows at a given portion of lung volume, as previously described. 6,7 …”

“…6,7 At each experimental condition we plotted volume against flow and identified the inflection point of the curve, defined as the point of maximum slope following the expiratory peak flow. We then subdivided the expired volume from the inflection point to the end of expiration into 5 equal slices (Fig.…”

“…6,7 The present physiology study evaluates the effect of inhaled albuterol on expiratory re-sistance in patients with COPD exacerbation, and examines the correlation of albuterol-induced changes in expiratory and inspiratory resistance.…”