Study on endolymphatic hydrostatic pressure regulating function of endolymphatic sac

2016 Fiscal Year Final Research Report

• Project/Area Number: 26861387
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Otorhinolaryngology
• Research Institution: Kagawa University
• Principal Investigator: Inamoto Ryuhei 香川大学, 医学部附属病院, 助教 (50581047)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 内リンパ嚢 / 蝸牛 / 前庭 / カテコールアミン / 内リンパ静水圧 / 外リンパ静水圧

Outline of Final Research Achievements

The hydrostatic pressures of endolymph and perilymph in the ampulla and cochlea were similar in magnitude. Isoproterenol significantly increased hydrostatic pressure of ampullar and cochlear endolymph and perilymph with no change in the ampullar endolymphatic potential and endocochlear potential, respectively. The isoproterenol-induced maximum change of endolymphatic hydrostatic pressure in ampulla was significantly (p < 0.01) smaller than that in the cochlea. In ears with an obstructed endolymphatic sac, the action of isoproterenol on endolymphatic hydrostatic pressure in the ampulla disappeared like that in the cochlea. Isoproterenol elevates endolymphatic hydrostatic pressure in different manner between the vestibule and the cochlea.

Free Research Field

耳科学