BPPV良性发作性位置性眩晕课件.ppt

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1、BPPV 良性发作性位置性眩晕BPPV良性发作性位置性眩晕BPPV良性发作性位置性眩晕BPBasic Anatomy Basic Anatomy2Basic Anatomy233BPPV BPPVn n Barany 1921 Barany 1921n n Dix-Hallpike 1952 important features of nystagmus Dix-Hallpike 1952 important features of nystagmus n n Abnormal sensation of motion elicited by certain critical positions

2、 Abnormal sensation of motion elicited by certain critical positionsn n Provocative position Provocative position nystagmus nystagmusn n At least 20%of vertigo At least 20%of vertigon n Underestimated Underestimated 4BPPVBarany 19214BPPV BPPV n n Pathophysiology:Pathophysiology:Canalithiasis Canalit

3、hiasis cupulolithiasis cupulolithiasis5BPPV Pathophysiology:5Pathophysiology(cont.)Pathophysiology(cont.)n n Cupulolithiasis:Cupulolithiasis:Harold Schuknecht 1962 Harold Schuknecht 1962 Densities(otocania)adherent to cupula of crista ampullaris Densities(otocania)adherent to cupula of crista ampull

4、aris Basophilic particles-1969 Basophilic particles-19696Pathophysiology(cont.)Cupuloln n Canalithiasis:Canalithiasis:John Epley 1980 John Epley 1980 Densities free floating in canal portion Densities free floating in canal portion Parnes,McClure 1991 found particles in post SCC Parnes,McClure 1991 found particles in post SCC 7Canalithiasis:7Pathophysiology Pathophysiology8Pathophysiology8