The primary purpose of incentive spirometry is to improve lung function by encouraging deeper and slower breathing. This helps to expand the lungs, prevent atelectasis (lung collapse), and improve

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1. The primary purpose of incentive spirometry is to improve lung function by encouraging deeper and slower breathing. This helps to expand the lungs, prevent atelectasis (lung collapse), and improve gas exchange. $$\boxed{\text{To improve lung function by encouraging deeper and slower breathing}}$$
2. The process of flushing the external ear with saline or sterile water is called ear irrigation. This procedure is often performed to remove cerumen (earwax) or foreign bodies from the ear canal. $$\boxed{\text{Ear irrigation}}$$