In this study, the primary aim is to describe, through a prospective cross-sectional study, the current intubation practice of adult critically ill patients undergoing endotracheal intubations with secondary aims exploring complications that may emerge during the peri-intubation period and to isolate predictive factors of these complications. This information will generate hypotheses which will lead to further study with the ultimate impact of reducing patient-related outcomes such as morbidity and mortality.