Rapi Sequence Induction (RSI) is an advanced medical protocol of advanced airway support designed for the expeditious intubation of the trachea of a patient. RSI is generally used for patients who are suspected of having an increased risk of aspirating stomach contents into the lungs. The technique is a quicker form of the process normally used to "induce" a state of general anesthesia. It uses drugs to rapidly allow an endotracheal tube to be placed between the vocal cords, by blocking the patient's involuntary reflexes and muscle tone in the oropharynx and larynx. Once the endotracheal tube has been passed between the vocal cords, a cuff is inflated around the tube in the trachea and the patient can then be artificially ventilated.