The nurse is auscultating the chest in an adult client. Which technique is correct?

A. Have the client lean over an over-the-bed table: This position is sometimes used during posterior thoracic examination or for percussing lung fields, but it is not standard for routine chest auscultation. Most chest sounds can be assessed with the client sitting upright or lying down. B. Use the bell of the stethoscope held lightly against the chest: The bell is best for detecting low-pitched sounds like some heart murmurs, not respiratory sounds. Lung sounds are higher-pitched and require use of the diaphragm for accurate auscultation. C. Use the diaphragm of the stethoscope held firmly against the chest: This is the correct technique for auscultating lung sounds, which are typically high-pitched. Holding the diaphragm firmly ensures clear transmission of breath sounds such as crackles, wheezes, or rhonchi. D. Instruct the client to take deep, rapid breaths through their nose: Deep breathing is appropriate during auscultation, but it should be done through the mouth. Breathing through the nose may reduce air entry and obscure abnormal sounds, making it harder to detect lung pathology.