The ice-water caloric test

Acta Oto-laryngologica
Angel Batuecas-CaletrioNicolas Perez-Fernandez

Abstract

Three possible results are commonly seen after ice-water caloric irrigation and to correctly interpret them the function of the corresponding vestibular receptor and of normal endolymphatic flow must be taken into account. Bedside vestibular examination helps to interpret discrepant findings. To review the findings obtained with the ice-water caloric test in patients with dizziness and to compare the results with those of the bedside test. The study was undertaken in a university hospital, tertiary medical center. The indications to perform the ice-water caloric test were: 1) unilateral canal weakness >90%; 2) a maximum slow phase velocity of nystagmus after hot (44 degrees C) and cold (30 degrees C) caloric stimulation in either ear of <9 degrees s(-1); or 3) in both ears <15 degrees s(-1). After irrigating the ear with ice water, nystagmus was recorded in the face-up and face-down positions. The result of the test was classified as a response (nystagmus beats away from the irrigated ear in the supine position and changes when in prone), a gravity-independent response (nystagmus does not change in direction in the prone position) or no response. The spontaneous and post head-shaking nystagmus, as well as the results of the hea...Continue Reading

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Citations

Jul 30, 2014·Journal of Neuroscience Methods·Sebastian M Frank, Mark W Greenlee
Sep 5, 2014·Journal of Neurophysiology·Sebastian M FrankMark W Greenlee
Dec 12, 2019·Audiology & Neuro-otology·Nicolás Pérez-FernándezRaquel Manrique-Huarte
Sep 10, 2010·Current Opinion in Otolaryngology & Head and Neck Surgery

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