The hemodynamic assessment of patients including temperature, pulse and mean arterial blood pressure was acceptable for weaning of our patients and the difference was insignificant (Table 5). Echocardiographic data of pa- tients showed no significant differences in LA, LVED and LVES dimensions and EF% (Table 6). Several indices have been selected in our study as respiratory rate, tidal volume, maximal inspiratory pressure, occlusion pressure and CROP index (thoracic compliance, respiratory rate, arterial oxygen- ation and MIP). The difference between proposed weaning indices in the current study was not significant between both groups (Table 7). The overall mortality rate in the 28 day fol- low up was 6% (one patient in group I and two patients in group II), out of the 50 COPD patients included in the study,
3 non survived after ICU discharge during their hospital stay.