Investigations on the Critical Perilymphatic Pressure Value Causing Round Window Membrane Rupture in Anesthetized Cats

Ernö Miriszlai ORL Department of the Second Pediatric Clinic and Experimental Research Department, Semmelweis University Medical School, Budapest, Hungary

Péter Sándor ORL Department of the Second Pediatric Clinic and Experimental Research Department, Semmelweis University Medical School, Budapest, Hungary

Abstract

Increasing perilymphatic fluid pressure was found to be an important factor in the etiology of round window membrane rupture. The critical pressure, causing membrane rupture was determined in anesthetized cats. Its value was found to be in the range 10-30 mmHg (x ± S.E.M. = 23.4 ± 17.1). This value was compared with the pressure increases caused by thoracic and abdominal compression, cervical strangulation, forced Trendelenburg positon, coughing and sneezing.

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Investigations on the Critical Perilymphatic Pressure Value Causing Round Window Membrane Rupture in Anesthetized Cats

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Investigations on the Critical Perilymphatic Pressure Value Causing Round Window Membrane Rupture in Anesthetized Cats

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