Effect of Blood Pressure on Cochlear Blood Flow:Observations by Laser Doppler Method, Hydrogen Clearance Method and Oxygen Tension Determined by a Polarographic Technique
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概要
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Cochlear circulation was measured in guinea pigs by three methods : laser Doppler, hydrogen clearance and oxygen tension (PO<SUB>2</SUB>). The effect of blood pressure (BP) changes was examined with a doppler needle probe plased on the 2nd turn, and a hydrogen or oxygen-sensitive microelectrodes inserted into the endolymph of the same turn. The BP was elevated by an intravenous infusion of norepinephrine and lowered by bleeding. The cochlear blood flow (PO<SUB>2</SUB>) correlated well with the BP. However, the percentage of change of cochlear blood flow (PO<SUB>2</SUB>) at low BP was less than that at a high BP, indicating that cochlear vessels have an autoregulating ability at a low BP.
- 一般社団法人 日本めまい平衡医学会の論文
一般社団法人 日本めまい平衡医学会 | 論文
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