Millions of patients undergo upper GI endoscopy in the United States each year. A large
number of these patients have anesthesia to assist with their comfort during the procedure.
The majority of patients do not have a protected airway during the procedure, meaning there
is no endotracheal tube. Instead the current standard of care is to give supplementary oxygen
via nasal cannula. Because patients are deeply sedated or have general anesthesia there is a
risk for low oxygen saturation during the procedure, which presents a significant patient
safety issue. The purpose of the clinical trial is compare the current anesthesia standard of
care against high flow nasal cannula oxygen delivery during anesthesia. The investigator's
hypothesis is that high flow nasal cannula oxygen delivery will decrease the frequency with
which patients experience hypoxemia during anesthesia for upper GI endoscopy.