From: Determinants of weaning success in patients with prolonged mechanical ventilation
Successful weaning group (n = 16) | Failed weaning group (n = 14) | P value | |
---|---|---|---|
Ventilatory pattern | |||
VT, mL | 336.5 ± 158.3 | 299.5 ± 213.4 | NS |
f, breaths/min | 26.1 ± 7.5 | 32.4 ± 5.2 | 0.01 |
f/VT | 109.4 ± 74.5 | 173.9 ± 103.4 | NS |
Respiratory mechanics | |||
CLdyn, L/cm H2O | 0.049 ± 0.032 | 0.051 ± 0.035 | NS |
RL, cm H2O/L per s | 13.4 ± 9.0 | 12.9 ± 9.4 | NS |
PEEPi,dyn, cm H2O | 1.93 ± 1.36 | 2.7 ± 3.1 | NS |
Inspiratory muscle function | |||
MIP, cm H2O | 45.2 ± 19.5 | 32.7 ± 18.2 | NS |
Pdimax, cm H2O | 34.9 ± 18.9 | 25.4 ± 17.3 | NS |
Pdisw/Pdimax, percentage | 36.1 ± 15.8 | 54.4 ± 25.5 | 0.02 |
PTPdi/min, cm H2O/s | 235.8 ± 126.9 | 268.0 ± 234.8 | NS |
TTdi | 0.13 ± 0.065 | 0.21 ± 0.12 | 0.02 |