Correct instruction in the technique of incentive spirometry should include which of the follow-ing?

a. Use of accessory muscles at high inspira-tory flows
b. Diaphragmatic breathing at slow to mod-erate flows
c. "Panting" at volumes approaching total lung capacity
d. Use of accessory muscles at low inspira-tory flows

ANS: B
Correct technique calls for diaphragmatic breathing at slow-to-moderate inspiratory flows.