What demonstrates that a preoperative client understands how to use an incentive spirometer?

Using an incentive spirometer correctly is essential for a preoperative client to enhance lung expansion and prevent complications such as atelectasis. When the client understands how to use the spirometer, it demonstrates their ability to perform the essential technique of deep inhalation to achieve the desired results.

The correct choice—elevating the cylinder by inhaling deeply—indicates that the client knows the primary goal of the spirometer is to inspire air deeply, which causes the gauge to rise. This action reflects an understanding of the need to take slow, deep breaths to maintain good alveolar expansion, which is crucial post-surgery for promoting optimal respiratory function.

In contrast, blowing into the spirometer does not achieve the intended purpose, as the device is designed to measure inhalation rather than exhalation. Holding the spirometer at eye level can be a proper technique, but it does not necessarily imply effective use of the device since the focus should be more on the breathing technique itself. Lastly, using the spirometer for less than 5 minutes at a time does not align with the recommended usage guidelines, which typically encourage extended use to promote adequate lung expansion and maintain respiratory health.