1990
DOI: 10.1007/bf01724801
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Measurement of effective elastance of the total respiratory system in ventilated patients by a computed method

Abstract: We have studied 28 patients mechanically ventilated for acute respiratory failure at different levels of externally applied positive end-expiratory pressure (PEEPe). We describe and compare a computed method of measuring "effective" elastance of the total respiratory system (Ers,eff) with the static values of elastance of the total respiratory system (Ers,st), obtained with the end-inflation occlusion technique. Ers,eff was computed by an original device (Heres, R.P.A., Belgium), also the effective resistance … Show more

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Cited by 9 publications
(4 citation statements)
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“…In the presence of dynamic pulmonary hyperinflation, an end-expiratory occlusion maneuver is also required for the measurement of intrinsic PEEP (PEEP• the latter to be taken into account for correct results [6]. As alternative to the conventional methods, a statistical approach has been suggested [7][8][9] and recently been applied more widely [10][11][12][13][14], referred to as the "Least Squares Fit" (LSF) method. The LSF method provides some advantages, since it allows the simultaneous measurement of Rrs, Crs and total intrapulmonary PEEP (PEEPtot) without the need for constant inspiratory flow rate, end-inspiratory hold, and end-expiratory occlusion [10][11][12].…”
Section: Introductionmentioning
confidence: 99%
“…In the presence of dynamic pulmonary hyperinflation, an end-expiratory occlusion maneuver is also required for the measurement of intrinsic PEEP (PEEP• the latter to be taken into account for correct results [6]. As alternative to the conventional methods, a statistical approach has been suggested [7][8][9] and recently been applied more widely [10][11][12][13][14], referred to as the "Least Squares Fit" (LSF) method. The LSF method provides some advantages, since it allows the simultaneous measurement of Rrs, Crs and total intrapulmonary PEEP (PEEPtot) without the need for constant inspiratory flow rate, end-inspiratory hold, and end-expiratory occlusion [10][11][12].…”
Section: Introductionmentioning
confidence: 99%
“…An index that commonly is referred to as effective dynamic compliance, 22 or the dynamic characteristic, can be derived by dividing the ventilator-delivered V T by the peak P aw minus PEEP. This index is not a measure of true thoracic compliance because peak P aw includes all of the resistive and elastic pressure losses of the respiratory system and endotracheal tube.…”
Section: Dynamic Compliancementioning
confidence: 99%
“…As an alternative to these static measurements, a computed method evolved in 1990 by Gillard et al, 3 which was proposed to be accurate and provide a rapid approach to respiratory mechanics. This method is known as the linear least squares fitting method.…”
Section: Introductionmentioning
confidence: 99%