Comparison of the maximum slow-phase velocity with different stimulated sequence / 中国耳鼻咽喉头颈外科

ABSTRACT

OBJECTIVE Comparison of the maximum slow-phase velocity of cold and warm air with different stimulated sequence.METHODS Forty normal cases and 229 vertigo cases with bithermal caloric testing during 2004 to 2006 were randomly divided into two groups20 normal cases and 101 vertigo cases were stimulated with cold air first,and the other cases with warm air first.According to the canal paresis(CP)≥20%,each patients group was subdivided into the normal semicircular canal(SC) function group and the paresis SC function group. The maximal slow-phase velocity(MSV)during the strongest 10 seconds was counted,and compared among the subgroups.RESULTS Except the normal cases with warm air first,the differences between the subgroups were statistically significant.The cold air first group presented stronger MSV with cold air and the warm air first group presented stronger MSV with warm air.CONCLUSION The MSV stimulated by warm air was as the same as that stimulated by the cold air.With different stimulated sequence,the first stimulation induced stronger response.In normal cases,the cold air firstly stimulated induced much more vestibular adaption.