Thesis (M.Sc.) - Cairo University - Faculty of Medicine - Department Of E.N.T

There is compelling evidence that free - floating endolymph particles in the posterior semicircular canal underlie most cases of benign paroxysmal positional vertigo (BPPV) Recent pathological findings suggest that these particles are otoconia , probably displaced from the otolithic membrane in the utricleThey typically settle in the dependent posterior canal and render it sensitive to gravitypatients can be successfully treated with a simple outpatient maneuver that moves the particles back into the utricleVarious techniques for this maneuver , plus treatments for uncommon variants of BPPV such as that of the lateral canal was describedFor the rare patients whose BPPV is not responsive to these maneuvers and have severe symptoms , posterior canal occlusion surgery is a safe and highly effective procedure

Issued also as CD