LA DISCREPANCIA ENTRE LOS RESULTADOS DE LAS PRUEBAS VESTIBULARES (CALÓRICA Y VHIT) EN PACIENTES CON ENFERMEDAD DE MÉNIÈRE NO SE DEBE A LA DISFUNCIÓN DEL SISTEMA DE ALMACENAMIENTO DE VELOCIDAD

Abstract

Introduction: Many times we find discrepancies in the results of the caloric test (CAL) and VHIT. It can be due to the properties of each test or to the dysfunction of the central vestibular mechanism of storage of speed that is characterized by the measurement of the time constant (CT) of the rotary chair test (ROT). We want to show that the discrepancies are due to the characteristics of each test that should be able to be detected in ROT and CT.

Materials and methods: Patients included were diagnosed of MD All of them were subjected to the three vestibular tests: CAL, VHIT and ROT (sinusoidal harmonic acceleration (SHA) andt he impulsive rotational test). For the statistical analysis, the patients were divided into three groups: NN (CAL and normal vHIT), AN (abnormal CAL and normal vHIT) and AA (abnormal CAL and vHIT). A descriptive study was carried out to analyze the differences between the three groups and in the case of the results of ROT, with the control group. Statistical analysis was performed with SPSS

Results: The results are shown in the figures of the attached files

Discussion: We have found that the TC of the VOR, as measured in the ROT with the impulsive or step test, deteriorates significantly from normal only when both the gain of the VOR in the vHIT is lower than normal and canal paresis on the CAL is above normal: these results do not prove the hypothesis, the velocity storage dysfunction could not be the main cause to explain the dissociation in the CAL and vHIT.