Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

Mechanically ventilated COPD patients fulfilling standard weaning readiness criteria.
Invasive mechanical ventilation for more than 24 hours before spontaneous breathing trial.
Hemodynamically stable without significant vasopressor support.
Adequate oxygenation with FiO2 ≤ 0.5 and PEEP ≤ 8 cmH2O .
Preserved mental status and ability to initiate spontaneous breathing.
Successful tolerance of spontaneous breathing trial conducted on CPAP mode with pressure support ≤ 8 cmH2O.

D-RSBI Versus RSBI for Predicting Weaning Success in COPD Patients