HFNC for Induction During Bariatric Surgery Patients.

Study Protocol for the Use of High Flow Nasal Oxygen During the Anesthesia Induction and Weaning in Patients Scheduled for Bariatric Surgery. A Randomized Pilot Study

This study aims to compared the effects of high flow nasal during the induction and during the weaning of anesthesia on intraoperative and postoperative oxygenation and postoperative atelectasis in obese patients undergoing bariatric surgery versus the standard of care, which consists in supplemental oxygen with face mask (Venturi mask).

Inclusion Criteria:

• Body mass index > 35 Kg/m2
• Bariatric surgery
• Informed consent signed

Exclusion Criteria:

• age <18yr or >80yr
• pregnancy or breast-feeding status
• patients with previous known respiratory disease
• hemodynamic instability at entry (need of vasopressors or ionotropes at entry or a ventricular assist device