Figure 1.

Lung histological (A) and BALF cellular (B) changes during surgery. (A) Image from a patient before (above) and after CPB (below) presenting all possible outcomes on the 5-point lung injury scale (congestion in the alveolar capillaries, hemorrhage, neutrophilic infiltration or aggregation in airspace or vessel wall, thickness of the alveolar septae, and hyaline membrane formation). Additional information about the lung injury score is provided in Section 4.3. (B) Representative image of a BALF sample taken from a patient after CPB. The morphology of the most common cells identified is shown below.