The nurse is preparing to assist the patient in using the incentive spirometer. Which nursing intervention should the nurse provide $\mathbf{first}$ ?

A) Perform hand hygiene.
B) Explain use of the mouthpiece.
C) Instruct the patient to inhale slowly.
D) Place in the reverse Trendelenburg position.

Incentive Spirometer

A medical device used to help patients improve the functioning of their lungs, particularly after surgery or during treatment for respiratory conditions.

Reverse Trendelenburg

A bed positioning technique where the head of the bed is raised and the foot of the bed is lowered to improve patient comfort or for medical reasons.

Hand Hygiene

The practice of washing or sanitizing the hands to remove dirt, germs, and harmful microorganisms to prevent disease.