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Fig. 1 | Critical Care

Fig. 1

From: Influence of overdistension/recruitment induced by high positive end-expiratory pressure on ventilation–perfusion matching assessed by electrical impedance tomography with saline bolus

Fig. 1

Illustration of the data analysis method of regional recruitment, overdistension, and V-Q matching in one study patient. Top: tidal variation images at ZEEP (left), PEEP (middle), and the corresponding difference image (right). In the tidal variation images, regions with low ventilation are marked in dark blue and highly ventilated regions in light blue to white. Collapsed or overdistended regions are comprised in the low/non-ventilated dark blue or black areas. In the difference image, ventilation gain and loss at PEEP compared to ZEEP are marked in blue and orange, respectively. Middle: perfusion images at ZEEP (left) and PEEP (middle). Highly perfused regions are marked in red. Colorbars in arbitrary units. Recruited and overdistended regions were defined based on ventilation difference image (right). Bottom: regional V-Q matching images at ZEEP (left) and PEEP (right)

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Critical Care

ISSN: 1364-8535