Final answer:
Otosclerosis is a disorder that affects the middle ear and can result in hearing loss. One early symptom of otosclerosis is hearing loss.
Step-by-step explanation:
Otosclerosis is a disorder that affects the middle ear and can result in hearing loss. One early symptom of otosclerosis that the nurse would expect to note in the client's health care record is hearing loss. This is because otosclerosis primarily affects the bones of the middle ear, specifically the stapes bone, which can lead to impaired sound transmission and subsequent hearing loss.