Flow-Controlled Versus Volume-Controlled Ventilation During Suspension Laryngoscopy

Suspension laryngoscopy presents significant challenges for airway management due to the need to maintain adequate ventilation while providing optimal surgical exposure. Flow-controlled ventilation (FCV) is a novel ventilation mode that delivers constant inspiratory and expiratory flow using a narrow-lumen, cuffed endotracheal tube, potentially improving ventilation efficiency in shared-airway surgeries. This prospective observational study aims to compare flow-controlled ventilation and conventional volume-controlled ventilation in patients undergoing elective suspension laryngoscopy. Respiratory mechanics, hemodynamic parameters, perioperative pulmonary function, and procedure-related complications will be evaluated to assess the feasibility and clinical performance of FCV in this surgical setting.