Irrigation Fluid Volume, Tube Cuff Pressure, and Neck Swelling During Shoulder Arthroscopy

During shoulder arthroscopy, fluid is pumped into the shoulder to help the surgeon see inside the joint. Some of this fluid can move into the tissues around the shoulder and neck and cause swelling. During general anesthesia, a breathing tube is placed in the windpipe. This tube has a small inflatable balloon, called a cuff, whose pressure may increase when the surrounding tissues swell. The purpose of this study is to determine whether larger amounts of irrigation fluid used during shoulder arthroscopy are associated with greater increases in breathing tube cuff pressure and neck soft tissue thickness. About 60 adults undergoing planned shoulder arthroscopy in the beach-chair position will take part. The study will not change the participants' anesthesia, surgery, or treatment. Researchers will record the amount of irrigation fluid used, measure cuff pressure at set times during surgery, and measure the neck before and after surgery using ultrasound and a measuring tape. Sore throat, hoarseness, and other airway symptoms will be assessed after surgery. Participants will be followed until six hours after surgery.