A nurse is collecting data from a client who is having an acute asthma exacerbation. When auscultating the client's chest, the nurse should expect to hear which of the following sounds?

Choice A rationale During an acute asthma exacerbation, the airways become narrowed due to bronchospasm, mucosal edema, and mucus production. As the client exhales, the air is forced through these constricted bronchioles, creating a high-pitched, musical whistling sound known as a wheeze. This is most commonly heard during expiration. The presence of expiratory wheezing is a hallmark diagnostic finding that indicates increased airway resistance and the need for bronchodilator therapy. Choice B rationale Fine rales, also known as crackles, are discontinuous, popping sounds often compared to the sound of Velcro pulling apart. They typically occur when air enters previously closed small airways or alveoli, often due to fluid accumulation. This sound is more characteristic of conditions like pneumonia, heart failure, or pulmonary edema. While asthma involves inflammation, the primary sound associated with the restricted airflow of an acute attack is wheezing rather than the popping of fluid-filled sacs. Choice C rationale Rhonchi are low-pitched, continuous sounds that often resemble snoring or rattling. They are caused by secretions or obstructions in the larger airways, such as the trachea or bronchi. While a client with asthma may have some mucus production, the predominant sound during an acute exacerbation is the high-pitched wheezing of narrowed small airways. Rhonchi are more commonly associated with chronic bronchitis or other conditions where large amounts of thick sputum are present. Choice D rationale A pleural friction rub is a dry, grating, or creaking sound heard during both inspiration and expiration. it occurs when the pleural surfaces become inflamed and rub against each other, often due to pleuritis or pulmonary infarction. It is not a characteristic sound of asthma, which is a disease of the intrapulmonary airways rather than the pleural lining. Asthma involves narrowing of the tubes that carry air, not inflammation of the lung's outer membranes.