[Observation of cristae of posterior ampullae with laser Doppler]

To set up the methodology of measuring vestibular blood flow was the key to the study of vestibular microcirculation. 10 guinea pigs' posterior ampullae cristae blood flow were measured with Laser Doppler Flowmetry.

cochlear flow was 318.39 +/- 91.66mV. Cristae of posterior ampullae was 194.00 +/- 45.26mV. The arterial blood pressure was stable in 9.99 approximately 10.27kPa. The present results showed cochlear and vestibular blood flow were 62.14% and 37.86% in total inner ear blood circulation. The latter appeared to be about one half of cochlear blood flow. These suggested that the blood flow of posterior ampullae can reflect the blood flow of vestibular to some degree. Laser Doppler was technically simple, non-invasive, highly stable, reproducible and sensitive.