This document provides information on endotracheal suctioning. It defines endotracheal suctioning as removing secretions from the tracheobronchial tree through an endotracheal tube using mechanical suction. The purposes are to maintain a clear airway, prevent infections, provide effective ventilation, and stimulate coughing. The document outlines the assessment, patient preparation, equipment, procedure, documentation, and complications of endotracheal suctioning.