|
PSV
|
PSV
|
PSV
|
PSV
|
T piece
|
After extubation
|
---|
+7 cmH2O PEEP
|
0 cmH2O PEEP
|
+7 cmH2O PEEP
|
0 cmH2O PEEP
|
---|
+7 cmH2O
|
+7 cmH2O
|
0 cmH2O
|
0 cmH2O
|
---|
Swing Pes, cmH2O
|
7.2 ± 5.0*
|
13.4 ± 5.5*
|
12.3 ± 6.3*
|
19.1 ± 7.7
|
19.8 ± 7
|
19.1 ± 5.4
|
Swing Pdi, cmH2O
|
8.4 ± 5.5*
|
15.4 ± 5.7*
|
14.2 ± 6.4*
|
21.2 ± 8.1
|
21.7 ± 7.0
|
20.9 ± 5.5
|
PTP es, cmH2O.s/minute
|
141 ± 54*
|
259 ± 84*
|
231 ± 82*
|
346 ± 97
|
332.9 ± 85.9
|
365 ± 87
|
PTP di, cmH2O.s/minute
|
157 ± 80*
|
318 ± 113*
|
302 ± 111*
|
451 ± 151
|
439 ± 152
|
465 ± 117
|
WOB, J/L
|
0.69 ± 0.31*
|
1.15 ± 0.39*
|
1.09 ± 0.49*
|
1.58 ± 0.57
|
1.57 ± 0.56
|
1.56 ± 0.5
|
WOB, J/minute
|
7.15 ± 3.5*
|
12.2 ± 6.8*
|
12.4 ± 7.1*
|
17.7 ± 10.2
|
16.8 ± 8.0
|
17.8 ± 9.1
|
- Abbreviations: Pdi trans-diaphragmatic pressure, PEEP positive end-expiratory pressure, Pes esophageal pressure, PTPdi trans-diaphragmatic pressure time product, PTPes esophageal pressure time product, PSV pressure support ventilation, WOB work of breathing. *p < 0.001 when compared with after extubation