F. Insert an appropriately sized, cuffed endotracheal tube or tracheostomy tube (usually a #5 or #6) into the cricothyroid membrane incision, directing the tube distally into the trachea.

• 将导管置入切口，并明确导管远端位于气管内。要选用合适型号的导管（一般是5、6号），气管插管用的带气囊的导管或气管切开使用的导管均可选用。