Abstract：
UNASSIGNED: The Dix-Hallpike test is recommended to diagnose Benign Paroxysmal Positional Vertigo (BPPV). This research aimed to quantify the movement of a healthy subject during the Dix-Hallpike test and determine what factors contribute to performance variation from the recommended head position with 20° cervical extension, 45° cervical rotation, and a brisk movement velocity.
UNASSIGNED: Examiners performed the Dix-Hallpike test 10 times. The examinee\'s movement was recorded with Qualisys and processed with Visual3D. The proportion of variation in test performance within examiners, between examiners, and due to examiner position was calculated.
UNASSIGNED: Thirteen participants, 54% male and mean age 40, performed 50 cranial and 77 lateral Dix-Hallpike tests. Head position differed significantly from the recommendations with the cranial tests for extension (mean difference [MD] = 11.6°, p < 0.001) and rotation (MD = 4.8°, p < 0.001) and with lateral tests for extension (MD = 13.3°, p < 0.001). The largest proportion of variation was between examiners (60-91%), followed by within-examiners (3-16%). The examiner position contributed to 20% of the variation in the cervical rotation achieved. Tests lasted, on average, 1.80 s.
UNASSIGNED: Differences within and between examiners visually estimating the Dix-Hallpike test endpoints may impede BPPV diagnosis accuracy.
Vertigo diagnosis with the Dix-Hallpike may be improved by reducing inter-examiner differences with head positioning and velocity.With Dix-Hallpike testing, examiners should consider a cranial orientation relative to the examinee to better achieve the recommended head positioning.The cranial Dix-Hallpike and encouraging briskness as tolerated by the examinee should be emphasized with teaching the maneuver.
UNASSIGNED: Examiners performed the Dix-Hallpike test 10 times. The examinee\'s movement was recorded with Qualisys and processed with Visual3D. The proportion of variation in test performance within examiners, between examiners, and due to examiner position was calculated.
UNASSIGNED: Thirteen participants, 54% male and mean age 40, performed 50 cranial and 77 lateral Dix-Hallpike tests. Head position differed significantly from the recommendations with the cranial tests for extension (mean difference [MD] = 11.6°, p < 0.001) and rotation (MD = 4.8°, p < 0.001) and with lateral tests for extension (MD = 13.3°, p < 0.001). The largest proportion of variation was between examiners (60-91%), followed by within-examiners (3-16%). The examiner position contributed to 20% of the variation in the cervical rotation achieved. Tests lasted, on average, 1.80 s.
UNASSIGNED: Differences within and between examiners visually estimating the Dix-Hallpike test endpoints may impede BPPV diagnosis accuracy.
Vertigo diagnosis with the Dix-Hallpike may be improved by reducing inter-examiner differences with head positioning and velocity.With Dix-Hallpike testing, examiners should consider a cranial orientation relative to the examinee to better achieve the recommended head positioning.The cranial Dix-Hallpike and encouraging briskness as tolerated by the examinee should be emphasized with teaching the maneuver.
摘要：
■建议使用Dix-Hallpike测试来诊断良性阵发性位置性眩晕（BPPV）。这项研究旨在量化Dix-Hallpike测试期间健康受试者的运动，并确定哪些因素导致推荐的头部位置与20°颈椎伸展的性能变化。45°颈椎旋转，和轻快的运动速度。
■检查员进行了10次Dix-Hallpike测试。用Qualisys记录考生的动作并用Visual3D处理。考官内部测试表现的变化比例，在考官之间，并计算了由于考官的位置。
■13名参与者，54％的男性和平均年龄40岁，进行了50次颅骨和77次外侧Dix-Hallpike测试。头部位置与颅骨伸展测试的建议有显著差异（平均差异[MD]=11.6°，p<0.001）和旋转（MD=4.8°，p<0.001)和横向拉伸试验(MD=13.3°,p<0.001)。变异比例最大的是审查员之间(60-91%)，其次是内部审查员（3-16%）。检查者的位置占宫颈旋转变化的20％。测试持续,平均而言,1.80秒。
■在视觉上估计Dix-Hallpike测试终点的检查者内部和之间的差异可能会阻碍BPPV诊断的准确性。
Dix-Hallpike的眩晕诊断可以通过减少头部定位和速度的检查者之间的差异来改善。通过Dix-Hallpike测试,检查者应考虑相对于受检者的颅骨方向，以更好地实现推荐的头部定位。在教学中，应强调头颅Dix-Hallpike和考生可以容忍的鼓励轻快动作。
■检查员进行了10次Dix-Hallpike测试。用Qualisys记录考生的动作并用Visual3D处理。考官内部测试表现的变化比例，在考官之间，并计算了由于考官的位置。
■13名参与者，54％的男性和平均年龄40岁，进行了50次颅骨和77次外侧Dix-Hallpike测试。头部位置与颅骨伸展测试的建议有显著差异（平均差异[MD]=11.6°，p<0.001）和旋转（MD=4.8°，p<0.001)和横向拉伸试验(MD=13.3°,p<0.001)。变异比例最大的是审查员之间(60-91%)，其次是内部审查员（3-16%）。检查者的位置占宫颈旋转变化的20％。测试持续,平均而言,1.80秒。
■在视觉上估计Dix-Hallpike测试终点的检查者内部和之间的差异可能会阻碍BPPV诊断的准确性。
Dix-Hallpike的眩晕诊断可以通过减少头部定位和速度的检查者之间的差异来改善。通过Dix-Hallpike测试,检查者应考虑相对于受检者的颅骨方向，以更好地实现推荐的头部定位。在教学中，应强调头颅Dix-Hallpike和考生可以容忍的鼓励轻快动作。
