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. Author manuscript; available in PMC: 2020 Mar 10.
Published in final edited form as: Crit Care Med. 2020 Mar 1;48(3):e200–e208. doi: 10.1097/CCM.0000000000004141

Figure 3.

Figure 3

Effects of inspiration on the volume fractions and normalized volumes of gas and iodinated blood within the juxtadiaphragmatic slice over the course of two respiratory cycles. Results are presented for the three different gravitational regions of the studied slice and grouped by fractional atelectatic mass of the lung in expiration (FAMexp). Airway pressure traces are provided for comparison, and gray background denotes inspiration. In all regions and all FAMexp groups gas volume fraction and normalized gas volume increased (p ≤ 0.01) and blood volume fraction decreased (p < 0.005) during inspiration. The effects of inspiration on normalized blood volume were most pronounced in the FAMexp greater than or equal to 40% group, with normalized blood volume decreasing in the middle and nondependent regions and increasing in the dependent region. Points represent mean and sd.