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Influence of Air Flow Rate on Functional Evaluation of Semicircular Canals

Influence of Air Flow Rate on Functional Evaluation of Semicircular Canals
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摘要 Objective To study the influence of unilateral air flow rate change on the result of caloric test.Materials and Methods The unilateral weakness(UW) index was calculated when the air flow rate was set at 6 L /min in both ears(called symmetric stimulation) and again when it was set at 6 L /min in left ear and 3 L /min in the right ear(called asymmetric stimulation).Each individual subject was tested with both symmetrical and asymmetrical stimulations.Paired t test was used to examine the differences between results from symmetrical and asymmetrical stimulations.Result UW index decreased in response to asymmetrical stimulation.Conclusion Unilaterally decreased air flow rate can produce indices suggesting ipsilateral UW,which can be misleading. Objective To study the influence of unilateral air flow rate change on the result of caloric test.Materials and Methods The unilateral weakness(UW) index was calculated when the air flow rate was set at 6 L /min in both ears(called symmetric stimulation) and again when it was set at 6 L /min in left ear and 3 L /min in the right ear(called asymmetric stimulation).Each individual subject was tested with both symmetrical and asymmetrical stimulations.Paired t test was used to examine the differences between results from symmetrical and asymmetrical stimulations.Result UW index decreased in response to asymmetrical stimulation.Conclusion Unilaterally decreased air flow rate can produce indices suggesting ipsilateral UW,which can be misleading.
出处 《Journal of Otology》 2010年第2期101-103,共3页 中华耳科学杂志(英文版)
关键词 caloric test air flow rate caloric test air flow rate
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参考文献2

  • 1Ahmed MF,Goebel JA,Sinks BC.Caloric test versus rotational sinusoidal harmonic acceleration and step - velocity tests in patients with and without suspected peripheral vestibulopathy[].Otology and Neurotology.2009
  • 2Melagrana A,D‘Agostino R,Ravera B,Taborelli G.Comparison between air and water caloric tests in chil- dren[].International Journal of Pediatric Otorhinolaryngology.1999

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