SB | PSV | SB | PAV | PSV – PAV | |
---|---|---|---|---|---|
Values are mean (SD). | |||||
SB = spontaneous breathing; PSV = pressure support ventilation; PAV = proportional assist ventilation; V`e = minute ventilation; Vt = tidal volume; Ti = inspiratory time; Te = expiratory time; Ttot = total cycle duration; IC = inspiratory capacity; Tcco2 = transcutaneous CO2; Tco2 = transcutaneous O2; Sao2 = transcutaneous oxygen saturation; PSV − PAV = difference between PSV and PAV. | |||||
V`e (l/m) | 10.5 (2.3) | 13.9 (3.8)* | 10.1 (2.7) | 12.6 (4.0)* | +1.34 (1.51) |
Vt (l) | 0.5 (0.1) | 0.7 (0.2)* | 0.5 (0.2) | 0.7 (0.2)* | +0.1 (0.1) |
Ti (s) | 1.1 (0.3) | 1.1 (0.2) | 1.1 (0.2) | 1.1 (0.3) | +0.0 (0.2) |
Te (s) | 1.9 (0.6) | 2.0 (0.7) | 2.0 (0.6) | 2.3 (0.9) | −0.2 (0.7) |
Ttot (s) | 3.1 (0.9) | 3.1 (0.9) | 3.2 (0.8) | 3.4 (1.1) | +0.2 (0.7) |
IC (l) | 1.2 (0.3) | 1.1 (0.3) | 1.2 (0.3) | 1.2 (0.3) | −0.1 (0.2) |
Tcco2 (mm Hg) | 52 (6.1)) | 48 (6.2)* | 52 (6.8) | 49 (5.1)* | −1 (2.8) |
Tco2 (mm Hg) | 62 (7.8) | 63 (8.0) | 61 (8.6) | 65 (7.4) | −1 (6.7) |
Sao2 (%) | 90 (3.5) | 93 (1.8)* | 91 (2.4) | 92 (2.4) | 1 (2.1) |