Evaluation of Respiration adjusted shock index (RASI) as a predictor of endotracheal intubation and peri-intubation complications in critically ill patients presenting to Emergency department in a Tertiary care hospital

This study will evaluate the use of the Respiration Adjusted Shock Index (RASI) as a predictor of the need for endotracheal intubation and associated complications in critically ill patients in the emergency department. Patients with hemodynamic instability or those triaged as critical (red) based on WHO or trauma triage criteria will be monitored, assessed, and have RASI calculated if they meet the inclusion criteria. Blood tests, including lactate levels, will be analyzed, and patients will be followed to observe whether intubation is performed. If intubation occurs, the study will document the indications and complications such as peri-intubation hypotension, hypoxic episodes, cardiac arrest, and airway management challenges. Outcomes will be tracked until hospital discharge or mortality.