Lead Sponsor

University of Texas Southwestern Medical Center

Collaborators

Age

18 - 80 years

Sex

ALL

Healthy Volunteers

No

•18-80 years old
•Obese (BMI \> or equal to 30 kg/m2
•Scheduled for a non-emergent surgery that requires general anesthesia (e.g., orthopedic, breast, urological, colorectal, ENT, vascular, general surgery)
•Willing and able to consent in English or Spanish
•No current history of advanced pulmonary or cardiac disease

•Age less than 18 or older than 80
•BMI ≥50 or \< 30 kg/m2
•Patient does not speak English or Spanish
•Expected surgical duration longer than 4 hours
•Planned postoperative ICU admission
•Patient refusal
•Monitored anesthesia care (MAC) or regional anesthesia planned
•Pregnant or nursing women
•"Stat" (emergent) cases
•Known or suspected difficult airway
•Full stomach/significant aspiration risk (gastroparesis, emergency surgery, untreated moderate to severe gastroesophageal reflux disease, hiatal hernia)
•No history of gastric surgery
•Surgery in position other than supine (e.g., Trendelenburg)
•Laparoscopic surgery