The high-flow oxygen therapy system, also called the THRIVE (Transnasal Humidified Rapid-Insufflation Ventilatory Exchange) system, appears to provide better patient safety than conventional techniques. Panendoscopy is a very common diagnostic procedure in ENT surgery. The general anesthesia during the diagnostic panendoscopy is a good representation of the induction stage. Indeed, the procedure of preoxygenation preceding anesthetic induction and direct laryngoscopy corresponds to the airway management that is an integral part of each general anesthesia. This is why researchers are studying it in particular to improve patient safety during difficult intubations. The paradox is that there is no consensus on the anesthetic strategy for this procedure that counts four main methods for the airway management of patients requiring an ENT panendoscopy. In our center, the investigators use, in most situations, a variant of spontaneous ventilation described by Y. Jacquet et al., with the difference that the investigators use a transglottic oxygenation probe during the procedure. During laryngoscopy, the operator positions a naso-tracheal tube after local anesthesia of the vocal cords. The oxygen flow is reduced to 3 L/min before the exploration procedure. The arrival in operating theaters of the Optiflowâ„¢ system, developed by the New Zealand Company Fisher \& Paykel Healthcare, has led to a rethinking of the way oxygen is delivered. This device allows the administration of a flow rate of up to 70 L/min while delivering heated gases.
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Incidence of arterial desaturation
Timeframe: 1 day, during the procédure