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Otorinolaringologia 2000 September;50(3):145-50

Copyright © 2009 EDIZIONI MINERVA MEDICA

language: Italian

A comparison of three posturographic methods: Tetyrax, S.Ve.P. and Equitest

Barozzi S., Cesarani A., Arisi E., Bissola E., Ghiringhelli P.

Università degli Studi - Milano Istituto di Clinica ORL I, Ospedale Maggiore IRCCS - Milano *Prof. Straordinario di Audiologia - Università di Sassari


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Background. Postural evaluation has developed during last years with sophisticated posturographic methods. The Tetra-ataxiametry is based on the assessment of the interaction of vertical fluctuations on 4 independent platforms, each for one heel and toe part respectively with the possibility of studying diagonal patterns. In this report the Tetra-ataxiametry is compare with two well-known posturographic methods: the S.Ve.P platform and the Equitest system.
Methods. Thirty patients complaining of equilibrium disorders were tested with static and dynamic posturography (S.Ve.P and Equitest) and Tetra-ataxiametry.
Results. Tetrax Stability Index is significantly correlated with the lenght of the S.Ve.P in all the three conditions of the test and with the equilibrium scores of the Equitest in only one condition (eyes closed and solid surface). Equitest lacks of sensitivity in assessing equilibrium disorders. Postural sway frequency analysis is more detailed in Tetrax versus S.Ve.P and is not supplied by the Equitest. Tetrax Weight distribution correlates with the average of the X and Y deviations and is more sensitive than the Equitest in revealing postural asymmetries.
Conclusions. Tetrax is able to record torsional movements of subjects not supplied by the other posturographic methods (Equitest and S.Ve.P) with the Synchronisation scores. Its limits are the excessive complexity of software in data analysis and in the correlation with normative data. In spite of technical and analysing difficulties some correlations comparing the three posturographic methods have been found.

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