瘻孔症状の臨床診断学的意義に関する研究

―その4:その後のTullio現象陽性例―

抄録

We have previously reported the Tullio phenomenon in 7 ears of 6 patients. Since then we have found the same phenomenon in 11 ears of 9 cases. Since the fistula sign was also positive in all of these cases a similar pathophysiological mechanism appears to participate in both of these phenomena. Nystagmus seen in the Tullio phenomenon was either monophasic or biphasic. The biphasic type is further classified by the direction of the first phase which is directed either to the affected side or to the intact side. The monophasic type of nystagmus probably results from hyperexcitability of the inner ear or preparedness of nystagmus. The biphasic nystagmus appears to be caused by the contact between the stapes footplate and the membranous labyrinth. Thus it stimulates or inhibits the sensory cells by a hydrostatic mechanism.