Randomized clinical trial comparing the use of high-flow nasal catheter vs. traditional nasal catheter after anesthesia for orotracheal intubation of preoperative patients with traumatic orthopedic surgeries

INTERVENTION: Device E02.585 E02.880.690 Intervention group: 30 patients will receive a high flow nasal cannula (17l / m, 30% Fio2 with a temperature of 36ºC) for 10 minutes. Once with arterial saturation greater than 95% and hemodynamic stability, they will undergo anesthetic induction Control group: 30 patients will receive oxygen therapy with traditional oxygen catheter (3l / m) 10 minutes. Once with arterial saturation greater than 95% and hemodynamic stability, they will undergo anesthetic induction CONDITION: E02.585 E02.880.690 E03.155.197 H02.403.810.494 Oxygen Inhalation Therapy, anesthetic induction, intubation, traumatic orthopedic surgeries. ; E02.585 ; Q65.070 ; E03.155.197 ; E02.880.690 ; T88 ; H02.403.810.494 Q65.070 PRIMARY OUTCOME: Time (to be measured in minutes, with a digital timer) between anesthetic induction and saturation (to be monitored with finger oximeter) fall to 92%, at which time the orotracheal intubation will be performed; ; SECONDARY OUTCOME: Expected outcome 1: Arterial gasometry; to be performed by the anesthesiologist, by invasive blood pressure catheter; 10 minutes after implantation of the oxygen device (high flow catheter or traditional catheter, according to randomization), before anesthetic induction. ; ; ; Expected outcome 2: Heart rate; to be monitored in the surgical center with electrocardiogram electrodes, connected to the multiparametric monitor; 10 minutes after implantation of the oxygen device (high flow catheter or traditional catheter, according to randomization), before anesthetic induction. Expected outcome 3: Blood pressure; to be monitored in the surgical center, with cuff, connected to the multiparametric monitor; 10 minutes after implantation of the oxygen device (high flow catheter or traditional catheter, according to randomization), before anesthetic induction. Expected outcome 4: Peripheral oxygen saturation, to be monitored in the surgical center and in the RPA with finger oximeter, connected to the multiparametric monitor; 10 minutes after implantation of the oxygen device (high flow catheter or traditional catheter, according to randomization), before anesthetic induction. INCLUSION CRITERIA: Patients of both sexes will be included; older than 18 years; with indication of traumatic orthopedic surgeries.