Chronic Imbalance in an Older Adult with Bilateral Vestibular Hypofunction
A 71-year-old woman reports 2 years of unsteadiness, worse in the dark and on uneven ground, with oscillopsia when walking. She has had recurrent falls (two in the past year, no fracture). She takes a benzodiazepine nightly for sleep and a antihypertensive. Bedside head impulse testing shows catch-up saccades bilaterally. She has moderate bilateral high-frequency hearing loss and uses no hearing aids. She asks whether a medication or surgery can 'fix' her balance.
1. What is your diagnostic and management approach, and why is 'fixing' it with medication or surgery not appropriate?
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Approach:
- Diagnosis: Bilateral vestibular hypofunction (BVH) supported by bilateral catch-up saccades and oscillopsia; confirm with video head impulse testing and caloric testing, and consider causes (ototoxicity, autoimmune, neurodegenerative).
- Why not medication/surgery: There is no medication or surgery that restores vestibular function; vestibular suppressants (including her benzodiazepine) worsen compensation and increase fall risk. Deprescribe the benzodiazepine and review antihypertensives for orthostatic contribution.
- Core treatment: Vestibular rehabilitation (gaze stabilization, habituation, balance/gait training) is the mainstay. Address hearing loss with hearing aids to improve spatial awareness and reduce fall risk.
- Safety: Fall prevention, home safety, and bone health assessment.
2. How do you counsel her on prognosis, fall risk, and the role of hearing rehabilitation?
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Counseling:
- Prognosis: BVH is usually permanent, but function and confidence improve substantially with rehabilitation; oscillopsia often lessens over months.
- Fall risk: Two falls in a year is a red flag; address modifiable factors (sedatives, blood pressure, vision, footwear, home hazards) and consider a falls clinic.
- Hearing rehabilitation: Bilateral hearing aids improve awareness of environment and communication, indirectly supporting balance and safety; refer to audiology.
- Expectations: Frame goals as improved function and reduced falls, not cure; set a review timeline to reassess gait and falls.