A nurse is teaching a client about the use of an incentive spirometer. Which of the following instructions should the nurse include in the teaching?

Teaching on the use of an incentive spirometer focuses on improving lung expansion, preventing atelectasis, and promoting effective alveolar ventilation after surgery or periods of immobility. Incentive spirometer encourages deep, sustained inhalation to fully inflate the lungs and enhance oxygenation. Proper technique is essential to maximize alveolar recruitment and prevent postoperative pulmonary complications. Nursing education includes correct positioning, breathing technique, and frequency of use. Rationale: A. Holding the breath for about 3 to 5 seconds after inhalation is correct because it allows air to remain in the alveoli long enough to promote maximal gas exchange and alveolar expansion. This sustained inspiration helps prevent alveolar collapse (atelectasis) and improves oxygenation. It is a key step in effective incentive spirometer use. B. Positioning the mouthpiece 2.5 cm (1 inch) from the mouth is incorrect because the mouthpiece should be sealed tightly between the lips to ensure proper airflow and prevent air leakage. An open distance would reduce the effectiveness of the inhalation and compromise lung expansion. A tight seal is necessary for accurate device function. C. Exhaling slowly through pursed lips is not part of the correct technique for incentive spirometer use. The focus of the device is on slow, deep inhalation followed by a breath hold, not controlled exhalation through pursed lips. Pursed-lip breathing is more commonly used in conditions like chronic obstructive pulmonary disease (COPD) for airway control. D. Placing hands on the upper abdomen during inhalation is not required for incentive spirometer use and does not contribute to proper technique. While abdominal breathing can be used in other respiratory exercises, incentive spirometry specifically targets deep diaphragmatic inhalation without manual hand placement. Proper use depends on device coordination rather than hand positioning.