Rapid sequence intubation (RSI) is a medical procedure used to secure a patient's airway in emergency situations. It involves the rapid administration of sedative and paralytic medications to induce unconsciousness and prevent the patient from breathing or moving during intubation. RSI is typically performed by trained medical professionals such as paramedics, emergency physicians, or anesthesiologists to ensure a safe and successful intubation process in critical situations such as trauma, respiratory failure, or cardiac arrest. The goal of RSI is to facilitate the insertion of a breathing tube into the patient's trachea to maintain a clear airway and ensure adequate oxygenation and ventilation.