Triple semicircular canal occlusion versus labyrinthectomy in the cat.

HYPOTHESIS

We have theorized that surgical occlusion of all three semicircular canals (TCO) may be an effective means to treat vestibular pathology limited to semicircular canal dysfunction while preserving hearing and otolithic function.

BACKGROUND

A procedure that would eliminate vertigo while preserving hearing and minimizing postoperative dysequilibrium would be desirable.

METHODS

Staged bilateral TCO was performed on four cats and compared to staged bilateral labyrinthectomy in four cats. Balance and gait analysis were performed for 3 weeks after each surgical procedure--a total of 6 weeks of testing.

RESULTS

Balance testing, gait analysis, and righting reflex were found to be better among the cats undergoing TCO compared to labyrinthectomy.

CONCLUSIONS

Compared to labyrinthectomy in the cat, TCO appears to have advantages for vestibular compensation after unilateral and contralateral surgery.