NCLEX Review Guide: Otosclerosis

Understanding Otosclerosis

• Otosclerosis is a progressive disorder where abnormal bone growth occurs around the stapes bone in the middle ear, leading to fixation and conductive hearing loss.
• The condition primarily affects the oval window and stapes footplate, preventing normal sound transmission from the middle ear to the inner ear.
• Most commonly occurs in young to middle-aged adults (20-40 years) and has a strong genetic component with autosomal dominant inheritance.

Clinical Manifestations

• Progressive hearing loss that typically begins unilaterally but becomes bilateral, with patients often reporting better hearing in noisy environments (paracusis).
• Tinnitus may be present, usually described as a low-pitched roaring or buzzing sound that can be constant or intermittent.
• Weber test lateralizes to the affected ear, while Rinne test shows bone conduction greater than air conduction (negative Rinne).

Surgical Intervention: Stapedectomy

1. Pre-operative preparation includes audiometric testing and patient education about realistic expectations
2. Surgical procedure involves removal of the stapes and replacement with a prosthetic device to restore sound conduction
3. Post-operative care focuses on preventing displacement of the prosthesis and monitoring for complications

Immediate Post-Op Priorities

• Position patient on non-operative side to prevent prosthesis displacement and promote drainage from the operative ear.
• Monitor for signs of facial nerve damage including facial asymmetry, inability to close eyelid, or altered taste sensation.
• Assess for vertigo and implement fall precautions as dizziness is expected for 24-48 hours post-operatively.

Critical Discharge Instructions

• Avoid nose blowing, sneezing with mouth closed, or heavy lifting for 2-3 weeks to prevent increased pressure that could displace the prosthesis.
• Keep the ear dry for 6 weeks - no swimming, showering requires ear protection with cotton and petroleum jelly.
• Report immediately: sudden hearing loss, severe vertigo, facial weakness, or purulent drainage as these indicate potential complications.

Quick Knowledge Check

• ☐ I can explain why patients with otosclerosis hear better in noisy environments
• ☐ I understand the difference between conductive and sensorineural hearing loss
• ☐ I know the critical post-operative positioning for stapedectomy patients
• ☐ I can identify concerning vs. expected post-operative findings
• ☐ I understand discharge instructions to prevent prosthesis displacement