Skip to main content
Figure 1 | Critical Care

Figure 1

From: Measurement of alveolar derecruitment in patients with acute lung injury: computerized tomography versus pressure–volume curve

Figure 1

Illustration of the time course of the protocol. The upper panel represents the time course of the protocol for 12 patients for whom a computed tomography (CT) scan and pression–volume (P–V) curve in zero end-expiratory pressure (ZEEP) were acquired immediately after positive end-expiratory pressure (PEEP) withdrawal. The lower panel represents the time course of the protocol for 7 patients for whom a CT scan and P–V curve in ZEEP were acquired after 15 minutes of mechanical ventilation without PEEP. End-expiratory occlusion is defined as occlusion of the connecting piece between the Y piece and the endotracheal tube at end expiration; disconnection is defined as PEEP withdrawal, the patient being disconnected from the ventilator. ΔEELV, decrease in end-expiratory lung volume resulting from PEEP withdrawal measured by pneumotachography after the disconnecting maneuver.

Back to article page

Critical Care

ISSN: 1364-8535