Final answer:
A nurse would monitor for impaired balance as a clinical manifestation in a patient with vestibular dysfunction, often associated with conditions like Ménière's disease that affect inner ear structures.
Step-by-step explanation:
The clinical manifestation a nurse monitors in a patient with vestibular dysfunction is impaired balance. Vestibular dysfunction can occur due to a disorder such as Ménière's disease, which affects the inner ear structures leading to symptoms like vertigo, tinnitus, or sensorineural hearing loss. Patients with this condition experience changes in their equilibrium because the disease causes an accumulation or over-production of fluid in the inner ear, affecting both the vestibule and cochlea.