Why is it important to only suction while withdrawing the catheter?

Suctioning while withdrawing the catheter is crucial because it helps prevent trauma to the airway. When the catheter is inserted into the airway, there is a risk of damaging delicate structures, such as the mucosal lining and ciliated epithelium. By applying suction only during withdrawal, the procedure minimizes the potential for trauma. This technique allows for effective clearance of secretions while reducing mechanical irritation or injury to the airway, thereby promoting patient safety and comfort during the suctioning process.