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Research Article

Clinical usefulness of the rotatory, caloric, and vestibular evoked myogenic potential test in unilateral peripheral vestibular pathologies

, , , , , , , & show all
Pages 566-576 | Received 11 Mar 2010, Accepted 23 Mar 2011, Published online: 14 Jul 2011
 

Abstract

Abstract

Objective: The aim of this study was to investigate the diagnostic capacity of three different rotatory tests, and to investigate the clinical effectiveness of the caloric, rotatory, and vestibular evoked myogenic potential (VEMP) test. Design and study sample: Several rotatory tests—sinusoidal harmonic acceleration test (SHAT), pseudorandom rotation test (PRRT), velocity step test (VST)—and a caloric and a VEMP test, were given to 77 patients (mean age 52 years) with a unilateral peripheral vestibular pathology, and 80 control subjects (mean age 48 years). Results: For the rotatory test, the highest diagnostic capacity was obtained with the 0.01 Hz SHAT frequency, followed by 0.1 and 0.05 Hz. A higher diagnostic accuracy was reached for the caloric and VEMP test. The caloric test demonstrated high sensitivity and specificity values, but the 0.01 Hz SHAT rotation appeared more sensitive, and the VEMP more specific, than the caloric test. Conclusion: A selection of the 0.01, 0.05, and 0.1 Hz SHAT rotations is suggested as the most ideal rotatory test protocol, and a combination of rotatory, caloric, and VEMP testing will result in a more complete examination of our vestibular system.

Sumario

Objetivos: El objetivo de este estudio fue investigar la capacidad diagnóstica de tres diferentes pruebas rotatorias e investigar la efectividad clínica de las pruebas calóricas, rotatorias y de potenciales evocados vestibulares biogénicos (VEMP). Diseñ: Se aplicaron algunas pruebas rotatorias (prueba de aceleración sinusoidal armónica (SHAT), prueba de rotación pseudo-aleatoria (PRRT), prueba de velocidad de pasos (VST), prueba calórica y VEMP, a setenta y siete pacientes (edad promedio de 52 añs) con patología vestibular periférica unilateral y a 80 sujetos de un grupo control (edad media de 48 añs). Resultados: Para la prueba rotatoria, la más alta capacidad diagnóstica se obtuvo con la frecuencia SHAT 0.01, seguida por 0.1 y 0.05 Hz. La máxima precisión diagnóstica se alcanzó con las pruebas calórica y VEMP. La prueba calórica demostró altos valores de sensibilidad y especificidad, pero la de rotación SHAT en 0.01 pareció más sensitiva y el VEMP, más específico que la prueba calórica. Conclusiones: Se sugiere una selección de rotaciones SHAT de 0.01, 0.05 y 0.1 como protocolo ideal de pruebas rotatorias y una combinación de las pruebas rotatorias, calóricas y de VEMP, para lograr un examen más completo del sistema vestibular.

Acknowledgements

This research was supported by the Research Foundation – Flanders (FWO, Belgium) grant 1.5.183.05, and by the University Hospital Ghent.

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

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