| A tracheostomy tube is utilized to maintain the airway opening created by the stoma, while producing access for mechanical ventilation. Common components of the tracheostomy tube include:
Obturator: The obturator is a firm plastic rod that is rounded on the distal end that extends beyond the outer cannula of the tracheostomy tube. It is designed to assist with insertion of the tracheostomy tube, but must be withdrawn immediately as it blocks airflow.
The outer cannula: The outer cannula is a rigid tube inserted into the stoma until the flange, or neck guard, is flush to the patient’s neck. When the obturator has been removed, an inner cannula is usually inserted, but some patients may only utilize an outer cannula.
Inner cannula: The inner cannula is another hollow tube that is placed in the outer cannula and that may be cleaned or disposed of on a daily basis. The inner cannula assists with prevention of occlusion with secretions. If the inner cannula becomes occluded, removal may resolve the airway patency problem. | 
