Fig. 3From: The fraction of nitrous oxide in oxygen for facilitating lung collapse during one-lung ventilation with double lumen tubeDose-response curve for nitrous oxide plotted using probit analysis. The 50% effective concentration was 27.7% (95% confidence interval, 19.9–35.7%). The 95% effective concentration was 48.7% (95% confidence interval, 39.0–96.3%)Back to article page