Hyperventilation effect on postural sway
Hyperventilation effect on postural sway
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DOI：
10.1016/s0003-9993(97)90081-2
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发表时间：
1997-07-01
影响因子：
4.3
通讯作者：
Bronstein, AM
中科院分区：
文献类型：
--
作者：
Sakellari, V;Bronstein, AM
目的：探讨自主过度换气(I-IV)对体位摆动的影响，设计：交叉对照实验研究。地点：人体运动与平衡临床研究单位。对象：4组正常受试者(n=6、6、7、9)和双侧无前庭功能患者(n=9)。干预：用表面电极经皮测量二氧化碳分压(TC-pCO2)。主要观察指标：体位性摆动，结果：在所有情况下，高压组都增加了身体摇摆，但当受试者直接站在站台表面，闭上眼睛，30，60，90s后，正常受试者的记录显示，尽管CO，！HV水平与HV持续时间呈负相关，身体摇摆没有进一步增加，HV在受试者主动运动后也增加了摇摆。摇摆增加主要集中在摇摆面积、平均和最大偏差，而平均摇摆速度的增加较小，UV优先增加低频摇摆振荡。这些效应在迷路缺陷者中也存在。结论：HV会增加身体摇摆，但二氧化碳水平与失稳程度之间的关系不是线性的。HV综合征患者报告的头晕可能部分是由客观不稳定引起的。前庭功能缺失的患者存在HV所致的不稳定，提示HV的作用不是通过迷路介导的。(C)1997年由美国康复医学大会和美国物理医学和康复学会主办。
Objective: To examine the effect of voluntary hyperventilation (I-IV) on postural sway,Design: Crossover controlled, experimental study.Setting: Human movement and balance clinical research unit.Subjects: Four different groups of normal subjects (n = 6, 6, 7, and 9) and patients with bilateral absence of vestibular function (n = 9).Intervention: Partial carbon dioxide pressure (tc-PCO2) was measured transcutaneously with surface electrodes. Body sway was measured with a force platform immediately after maximal voluntary HV for 30 to 90 seconds, Recordings were obtained with eyes open and eyes closed, standing on the platform and on form-rubber, and after head or body movements.Main Outcome Measure: Postural sway,Results: HV increased body sway in all conditions, but the effects were more intense when subjects were standing directly on the platform surface with their eyes closed, Recordings after HV of 30, 60, and 90 sec in normal subjects showed that although CO,! levels were inversely related to the duration of HV, body sway did not increase further, HV also increased sway after active movements by the subjects. The main sway increase was in sway area and mean and maximal deviations but less for mean sway velocity, UV preferentially increased low-frequency sway oscillations. These effects were also present in labyrinthine-defective subjects.Conclusions: HV increases body sway, but the relationship between CO2 levels and degree of unsteadiness is not linear. The dizziness reported by patients with HV syndrome may be partly caused by objective unsteadiness. The presence of HV-induced unsteadiness in patients with absent vestibular function indicates that the effects of HV are not mediated by the labyrinth. (C) 1997 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation.