The investigators propose a prospective observational cohort study in order to investigate the perioperative respiratory complications of deep extubation in adults undergoing eye and head-and-neck surgery at Massachusetts Eye and Ear. Data pertaining to perioperative respiratory complications from adult patients presenting to MEE for eye and head and neck surgery who undergo deep extubation will be collected for this study.

Inclusion Criteria:

• Adult men and women who present to MEE for eye and head-and-neck surgery and undergo deep extubation will be included.

Exclusion Criteria:

• The study does not exclude anyone from the study.

Based on previous published study by Asai et al, the investigators proposed that a sample size of 300 patients will enable the group to report the complication rates with adequate precision in terms of a sufficiently narrow two-sided 95% confidence interval. Potentially eligible subjects for this study are all adult patients who undergo eye and head-and-neck surgery as well as deep extubation at the end of the surgery per the discretion of the anesthesiologist assigned to the case. Deep extubation is the default extubation method practiced at MEE. Therefore, there will be a sufficient number of potentially eligible subjects to meet the target enrollment goals.