Table 3 Impact of ventilator mode and level of assistance on the main descriptors of breathing pattern and electrical activity of the diaphragm (EAdi)

P_mean (cmH₂O)

 level₅₀

6.8 (6.1-8.7)

8.1 (6.3-10.3)

6.5 (6.0-8.5)^£

 level₁₀₀

9.8 (8.4-13.6)

9.6 (7.3-12.7)

9.1 (7.9-10.6)

 level₁₅₀

11.4 (9.2-13.4)

10.9 (8.0-13.8)

10.9 (8.5-13.2)

P_peak (cmH₂O)

 level₅₀

13.9 (12.4-15.7)

19.2 (16.1-22.4)*

16.2 (13.1-17.9)^£

 level₁₀₀

20.8 (17.8-22.5)

25.4 (19.9-31.4)*

20.5 (18.5-24.1)^£

 level₁₅₀

28.4 (22.6-29.7)

29.1 (23.4-41.3)*

25.9 (23.4-32.3)^£

Respiratory rate (n.min⁻¹)

 level₅₀

30 (25–34)

28 (25–32)

30 (26–34)

 level₁₀₀

24 (19–32)

27 (22–30)

28 (17–31)

 level₁₅₀

23 (17–25)

25 (20–29)

26 (18–30)

Tidal volume (mL.kg⁻¹ IBW)

 level₅₀

6.4 (5.4-8.7)

6.6 (5.5-9.9)

6.0 (4.8-8.4)

 level₁₀₀

7.5 (5.8-8.9)

6.9 (5.9-10.3)

6.2 (5.4-7.8)

 level₁₅₀

10.9 (8.9-12.0)

7.4 (5.9-10.5)*

7.4 (5.7-10.1)*

Minute ventilation (mL.min⁻¹)

 level₅₀

10.8 (8.9-15.8)

9.8 (8.2-14.4)

11.0 (7.9-14.5)

 level₁₀₀

10.6 (8.2-14.1)

10.0 (9.2-16.6)

9.8 (8.0-13.5)

 level₁₅₀

12.5 (9.8-17.3)

10.1 (7.8-13.9)

11.3 (8.6-14.5)

Inspiratory time (sec)

 level₅₀

0.72 (0.67-0.82)

0.77 (0.60-0.84)

0.73 (0.61-0.99)

 level₁₀₀

0.72 (0.67-0.95)

0.78 (0.61-0.93)

0.76 (0.64-1.06)

 level₁₅₀

0.85 (0.69-1.18)

0.79 (0.59-0.93)

0.83 (0.64-1.09)

EAdi_max

 level₅₀

9.1 (5.4-26.2)

14.3 (5.9-25.0)

18.1 (6.4-34.8)

 level₁₀₀

8.7 (3.9-20.9)

12.5 (5.1-19.7)

13.7 (8.9-27.2)*

 level₁₅₀

4.7 (2.9-15.1)

10.6 (5.3-18.0)

10.9 (4.1-13.1)*

EAdi_AUC

 level₅₀

9.5 (3.9-13.6)

9.9 (4.8-16.0)

13.2 (4.7-19.9)

 level₁₀₀

7.1 (3.6-13.5)

8.5 (4.9-12.3)

12.2 (6.2-18.8)*

 level₁₅₀

4.3 (2.4-8.7)

8.9 (4.4-11.4)

11.4 (3.3-14.5)*

V_T /EAdi_max

 level₅₀

0.67 (0.27-1.51)

0.44 (0.24-1.43)

0.40 (0.20-1.01)

 level₁₀₀

0.74 (0.29-2.13)

0.62 (0.33-1.64)

0.47 (0.25-0.96)*

 level₁₅₀

1.67 (0.64-3.22)

0.83 (0.37-1.60)*

0.54 (0.34-1.68)*