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Relationships of labyrinthine fluid pressures and blood flow.
Author(s) -
Carlborg Björn,
Farmer Joseph C.
Publication year - 1983
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1288/00005537-198308000-00005
Subject(s) - perilymph , autoregulation , blood flow , blood pressure , cerebrospinal fluid , cerebral blood flow , anesthesia , medicine , cardiology , chemistry , anatomy , inner ear
Control of labyrinthine blood flow analogous to the autoregulation of cerebral blood flow has been suggested but not experimentally demonstrated. This study concerns the influence of systemic arterial pressure changes on the perilymph and CSP pressures in cats with the cochlear aqueduct (CA) blocked. No direct correlation was found between changes in arterial and CSF pressure. This seemed to be due to the efficient autoregulation of the global cerebral blood flow — a main factor for CSF pressure regulation. The CSF and central venous pressures induced little and much delayed influence on the perilymph pressure when the CA was blocked. However, there was a direct correlation between changes in systemic arterial pressure and the perilymph pressure. This relationship seemed to be mediated via changes in local labyrinthine blood flow. The study indicated a lack of autoregulation of labyrinthine blood flow and a direct correlation between labyrinthine fluid pressure and blood flow when the CA was obstructed.