1988 Volume 47 Issue Suppl-4 Pages 73-77
The trapezoid rotation test with Contraves' computerized rotary chair system was carried out 108 times in 23 patients with Meniere's disease, and the results were analyzed in an attempt to find predictors for the next episode of vertigo.
1) Four types of results were observed during the course of Meniere's disease : labyrinthine preponderance ispilateralis (LPi), labyrinthine preponderance contralateralis (LPc), recruitment (Rec) and normal.
2) The LPi type appeared to precede an attack of vertigo, and the LPc type to follow it.
3) Rec and normal types were observed during stable periodes far from the time of an attack.
4) The ncidience of the LPi type increased as the episode of vertigo approached. Therefore, the appearance of the LPi type was thought to be a very important sign predicting the next episode, and it suggested the development of endolymphatic hydrops, which was supported by the glycerol test in patients and by animal experiments. It should be possible to prevent the next episode of vertigo by adequate therapy when the LPi type of response is observed.
