Figure 3

Ventilation/perfusion distributions. Continuous distributions of ventilation and blood flow (mean ± standard error of the mean) plotted versus ventilation/perfusion ratio (${\dot{V}}_A/\dot{Q}$). BL indicates baseline measurement after induction of stable acute lung injury, and treatment indicates measurement after 4 hours of pressure-controlled ventilation (PCV) either with (+ SB) or without (- SB) spontaneous breathing. HCl-ALI, hydrochloric acid-induced acute lung injury; OA-ALI, oleic acid-induced acute lung injury; V_DS, deadspace ventilation.