Which step is NOT part of the instructions for using an incentive spirometer?

The step that is not part of the instructions for using an incentive spirometer is to breathe in and exhale forcefully. The primary purpose of utilizing an incentive spirometer is to encourage deep inhalation, which helps to expand the lungs and improve oxygenation, particularly after surgery or during respiratory illness. The correct process involves inhaling slowly and deeply to ensure that the device registers the desired volume of air, which is essential for achieving the therapeutic benefits of the device.

Conversely, exhaling forcefully, as suggested in that step, does not contribute to the intended use of the incentive spirometer and may even hinder the process, as the focus should be on the inhalation phase rather than the exhalation. The other steps listed, such as sealing the lips around the mouthpiece, inhaling slowly and deeply, and holding the breath for a few seconds to allow the ball to remain elevated, are all critical components in its proper use to enhance lung capacity and promote effective breathing techniques.