This randomized controlled trial aims to compare the effectiveness of the AnchorFast™ endotracheal tube (ETT) securement device with conventional adhesive tape and gauze fixation in preventing oral mucosal pressure injuries and endotracheal tube dislodgement among mechanically ventilated elderly trauma patients admitted to the intensive care unit. A total of 90 patients aged 65 years and older requiring oral endotracheal intubation will be randomly allocated to one of the three securement methods. The primary outcomes are the incidence and severity of oral mucosal pressure injuries, assessed using the Beck Oral Assessment Scale (BOAS), and ETT displacement measured using the Endotracheal Tube Slippage Scale. Secondary outcomes include unplanned extubation, ease and time of fixation, need for assistance during application, and time to the development of pressure injury. The findings are expected to provide high-quality evidence to guide the selection of optimal ETT securement methods, improve patient safety, reduce device-related complications, and enhance the quality of critical care nursing practice in elderly trauma patients.