Airway Changes in Patients Undergoing Elective Surgical Procedures in the Prone and Trendelenburg Positions

"The patient's airway will be visually assessed and photographed while the patient is resting comfortable in bed with the head up at 30-45 degrees and classified into one of 4 MMS categories. Digital photographs will be taken and the stored image prepared by the investigators in such a way that the patient cannot be individually identified (mouth only).~Neck circumference will be measured at the level of the thyroid cartilage using a tape measure, with temporary ink marks on the skin to allow for subsequent measurements at the same point.~After the patient has been extubated and recovered in the PACU for 30 minutes, their airway will be re-assessed and documented. These evaluations will be repeated at 2, 3, and 4 hours, as well as the next morning."