Wen Chao, Deng Qiaomei, Liu Qiang, Han Xi, Li Shanshan, Chen Taisheng, Wang Wei
Department of Otorhinolaryngology Head and Neck Surgery，Tianjin First Central Hospital，Institute of Otolaryngology of Tianjin，Key Laboratory of Auditory Speech and Balance Medicine，Key Clinical Discipline of Tianjin（Otolaryngology.
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2021 Mar;35(3):209-211;215. doi: 10.13201/j.issn.2096-7993.2021.03.004.
To study whether the warm/cold air injection sequence affects the test results in the caloric test, and provide a basis for the specification and quality control of the caloric test. Video nystagmography and warm and cold air stimulation apparatus were applied for caloric test. Thirty healthy volunteers （60 ears） were divided into two groups of 15 （30 ears） each. The first group was given cold air stimulation followed by warm air stimulation, and the second group was given heat followed by cold. The differences in nystagmus maximal slow phase velocity （SPV）, semicircular canal paresis （CP） and dominant preponderance （DP） were compared between the two groups of subjects under different perfusion sequences of caloric test. The intensity of nystagmus evoked by subjects in group 1 （cold first and then warm） and group 2 （warm first and then cold） were similar. Paired -test showed that intra-group analysis of the SPV values of the two groups, comparison of the intensity of nystagmus evoked by different temperatures of the same ear or different sides of ear with the same temperature, the difference was not statistically significant （all >0.05）. Independent samples -test showed that between-group analysis of SPV values of two groups, the intensity of nystagmus induced by the same and different temperature stimuli in the ipsilateral ear, the difference was not statistically significant （all >0.05）. Independent samples -test showed that the CP values of the two groups were analyzed between groups, and the difference was not statistically significant （all >0.05）. Independent samples -test showed that DP values of both groups were in the normal range and the difference was not statistically significant （all >0.05）. Different perfusion sequences of warm and cold air do not affect the results of caloric tests, and the order of warm and cold air stimulation is not the normative and quality control research direction of caloric test.
研究冷热空气注入顺序是否会影响冷热试验的测试结果，为冷热试验的规范及质量控制提供依据。采用视频眼震图和冷热空气刺激仪进行冷热试验。30名健康志愿者（60耳）分为两组，每组15名（30耳）。第一组先给予冷空气刺激，后给予热空气刺激；第二组先给予热刺激，后给予冷刺激。比较两组受试者在冷热试验不同灌注顺序下眼震最大慢相速度（SPV）、半规管麻痹（CP）和优势偏向（DP）的差异。第一组（先冷后热）和第二组（先热后冷）受试者诱发的眼震强度相似。配对检验显示，两组SPV值的组内分析、同一耳不同温度或同温度不同侧耳诱发眼震强度的比较，差异均无统计学意义（均>0.05）。独立样本检验显示，两组SPV值的组间分析、同侧耳相同和不同温度刺激诱发眼震的强度，差异均无统计学意义（均>0.05）。独立样本检验显示，两组CP值的组间分析，差异无统计学意义（均>0.05）。独立样本检验显示，两组DP值均在正常范围内，差异无统计学意义（均>0.05）。冷热空气的不同灌注顺序不影响冷热试验结果，冷热空气刺激顺序不是冷热试验规范及质量控制的研究方向。
