Electronystagmography: A Study of Caloric Tests in Normal Subjects

Mehra, Y. N.

doi:10.1017/s0022215100062332

Cited by 22 publications

(29 citation statements)

References 8 publications

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“…This position places the lateral canal vertically, as a liquid column, and places the ampullary crest superiorly. 1,2,3 An upward change in the middle ear temperature above the bodily temperature causes the endolymph to move upwards, generating an endolymphatic current within the canal towards the ampulla. If the stimulus temperature is lower than the bodily temperature, there is the opposite movement, which generates an ampullary current towards the canal, away from the ampulla.…”

Section: Basics Of Caloric Testingmentioning

confidence: 99%

“…This author used water stimulation (250 ml per minute flow at 30°C and 44°C) and established that LP was a difference over 20% in the nystagmographic response between both sides; the worse labyrinth was that with the most deficient caloric response. 1,2,13 Currently, the normal standard for defining vestibular paresis varies among different ENT units; values from 20% a 33%, which depend on internal normalization, have been described. [12][13][14] In Brazil the terms labyrinthic paresis or weakness are uncommon; there is a preference for naming the best-responding labyrinth, using the denomination labyrinthic predominance.…”

Section: Labyrinthic Predominancementioning

confidence: 99%

“…46 Dysrhythmia of caloric nystagmus may also be seen in anxious or fatigued patients. 30 The use of inadequate alert exercises or the presence of Bell's phenomenon may result in periodic loss of the caloric response.…”

Section: Dysrhythmia Of Caloric Nystagmusmentioning

confidence: 99%

“…26,30 Anxiety about an unknown test is the commonly accepted explanation. Thus, orientation about the steps in caloric testing and the possibility of vertigo are important for patients.…”

Section: Anxiety and Nervousnessmentioning

confidence: 99%

“…1,2 The caloric response is connected with the central nervous system, which is important in differentiating between central and peripheral vestibular diseases.…”

Section: Introductionmentioning

confidence: 99%

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Interpretação e utilidade da prova calórica

Gonçalves¹,

Felipe²,

Lima³

2008

Rev. Bras. Otorrinolaringol.

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Cal oric testing is an otoneurologic evaluation of the status of the vestibular-ocular reflex; it allows an evaluation of each labyrinth separately. The main aspects on the use and interpretation of caloric testing are reviewed. Method: A systematic review of papers published in the past one hundred years on caloric testing was undertaken. The inclusion criteria were: cross-sectional, longitudinal, original articles, reviews and meta-analyses. Reviews of patient charts, case reports and editorials were excluded. The key-words were: caloric testing, nystagmus, vestibular system, directional preponderance, labyrinth predominance, monothermal caloric test, ice water caloric testing, Bell´s phenomenon. The databases were: COCHRAINE, MEDLINE, LILACS, CAPES. Results: Ninety-three of 818 abstracts fulfilled the inclusion criteria. After reading these articles, 55 were selected for this study. These papers discussed the basics of caloric testing, the types of stimulation, the interpretation of results, variables, artifacts, and the monothermal and ice water caloric test. Final comments: Caloric testing reference values may vary according to each unit; the the cutoff point is defined based on local studies. Attention to the technique is essential to maximize test sensitivity.

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Section: Basics Of Caloric Testingmentioning

confidence: 99%

Section: Labyrinthic Predominancementioning

confidence: 99%

Section: Dysrhythmia Of Caloric Nystagmusmentioning

confidence: 99%

“…26,30 Anxiety about an unknown test is the commonly accepted explanation. Thus, orientation about the steps in caloric testing and the possibility of vertigo are important for patients.…”

Section: Anxiety and Nervousnessmentioning

confidence: 99%

“…1,2 The caloric response is connected with the central nervous system, which is important in differentiating between central and peripheral vestibular diseases.…”

Section: Introductionmentioning

confidence: 99%

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