Trigger asynchrony is a thorny problem found in mechanically ventilated patients with chronic obstructive pulmonary disease (COPD). Though senior staff can usually provide precise adjustments in face of trigger asynchrony, most clinical practitioners are not experienced enough. The latest adaptive ventilation mode (AVM), which uses similar algorithms to that of Adaptive Support Ventilation (ASV), has two added functions of Auto. Rise. and Auto. Exp. Trig, which aim to increase the synchrony between patients and ventilators. In this case report, it is shown that trigger asynchrony found during weaning in ventilated COPD patients can be improved by using AVM mode.