Fig. 3

Relationship between setting stroke volume (sSV) and alveolar ventilation (\( \dot{\mathrm{V}} \)A). Legend: Marker indicates the sSV and mean value of \( \dot{\mathrm{V}} \)A (n = 5). Standard deviation is not indicated. The results of the statistical significance test are as follows: BF = 10 vs BF = 20, P < 0.001 with all sSV; BF = 10 vs BF = 30, P < 0.01 with sSV = 80, P < 0.001 with SV = 90–180; BF = 10 vs BF = 40, P < 0.05 with sSV = 80–90, P < 0.001 with sSV = 100–180; BF = 20 vs BF = 30, P < 0.05 with sSV = 80, 130, and 150, ns with sSV = 90–120 and 140, P < 0.01 with sSV = 160, P < 0.001 with sSV = 170–180; BF = 20 vs BF = 40, P < 0.001 with sSV = 80–100 and 170–180, P < 0.01 with sSV = 110, ns with sSV = 120–160; and BF = 30 vs BF = 40, P < 0.001 with sSV = 80–100, P < 0.05, with sSV = 110, 130, and 150, ns with sSV = 120, 140, and 160–180. Dotted curves are power approximations. The perfect powers (coefficient of correlation: R, P value) are as follows: BF = 10: 1.226 (R = 0.995, P < 0.001); BF = 20: 1.580 (R = 0.998, P < 0.001); BF = 30: 1.744 (R = 0.995, P < 0.001); and BF = 40: 1.819 (R = 0.994, P < 0.001)