In cochlear implant surgery, the electrode array is inserted into the cochlea. The most commonly used surgical approach for electrode insertion is via the:
- A Round window membrane or cochleostomy anterior-inferior to the round window ✓
- B Oval window (via stapes footplate)
- C Promontory directly
- D Semicircular canal ampulla
Correct answer: A. Round window membrane or cochleostomy anterior-inferior to the round window
Explanation
The electrode array of a cochlear implant is most commonly inserted via the round window membrane or through a small cochleostomy (drilled opening) just anterior and inferior to the round window niche. This approach allows insertion into the scala tympani. The round window approach is considered more atraumatic as it avoids intracochlear bone drilling at the insertion site, better preserving residual hearing.
Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.