LAP after the ASV
After the ASV, the LAP during the inspiratory phase significantly increased to 8.9 ± 4.1 mmHg as compared to that before the ASV (4.9 ± 5.4 mmHg) (p < 0.01) (Figure 2 ). The Δ lowest LAP between that before and after the ASV support was 6.6 ± 5.2 mmHg. The lowest LAP increased in 47/51 (92.2 %) patients with the ASV, and remained unchanged in the other four patients (Figure 3 ). Out of 37 patients with a negative lowest LAP value before the ASV, in 30 (81.1 %) patients the lowest LAP value turned out to be positive after the ASV. Even in the remaining seven patients, the lowest LAP increased to 4.6 ± 3.5 mmHg, but it did not reach more than 0 mmHg (from -6 to 0 mmHg). There were no significant differences regarding the patient characteristics or comorbidities between the patients with and without a negative lowest LAP value after the ASV (Table 3B ). The BIS value at the time of the LAP measurement was similar between the two groups (65.0 ± 13.6 vs. 69.0 ± 12.5, p = 0.75). The male gender also was not observed very frequently in the patients with a negative lowest LAP value (7/7 vs. 34/41, p = 0.32).