Your answer is:

Correct Answer: 3

Rationale:
Before suctioning, the nurse gives the client oxygen to prevent hypoxemia and hypoxia while removing air and debris from the upper airway. After inserting the catheter, the nurse positions the tip at the desired level, usually 6″ to 10″ (15 to 25 cm), occludes the vent, and twists the catheter to remove it. Afterward, the client is reoxygenated a second time. Usually, cleaning the tracheostomy stoma is done last after the sterile procedure is completed, following the general principal of: clean to dirty.