Final answer:
The eighth step to checking lung sounds involves asking the patient to breathe deeply to allow for the amplification of potential abnormal sounds or murmurs, and this is done during auscultation with a stethoscope.
Step-by-step explanation:
The eighth step in checking lung sounds involves asking the patient to breathe deeply and listening for airflow, as well as any abnormal sounds like crackling, using a stethoscope. This is part of a more extensive process known as auscultation. Deep breaths can amplify certain heart murmurs, which are sometimes detected during the assessment of lung sounds. In the case of lung issues such as pneumonia, where the lungs may fill with mucus, abnormal sounds like crackling can be indicative of the patient's condition. Additionally, abnormalities in lung sounds can be identified through the use of spirometry test results, which help diagnose respiratory diseases or determine the effectiveness of disease treatment.