Garcia-Mendez Yasmin, Pearlman Jonathan L, Boninger Michael L, Cooper Rory A
VA Pittsburgh Healthcare System, Pittsburgh, PA, USA.
J Spinal Cord Med. 2013 Jul;36(4):365-75. doi: 10.1179/2045772313Y.0000000124.
The purpose of this study was to evaluate whole-body vibration (WBV) exposure to wheelchair (WC) users in their communities and to determine the effect of WC frame type (folding, rigid, and suspension) in reducing WBV transmitted to the person.
An observational case-control study of the WBV exposure levels among WC users.
Thirty-seven WC users, with no pressure sores, 18 years old or older and able to perform independent transfers.
WC users were monitored for 2 weeks to collect WBV exposure, as well as activity levels, by using custom vibration and activity data-loggers. Vibration levels were evaluated using ISO 2631-1 methods.
All WC users who participated in this study were continuously exposed to WBV levels at the seat that were within and above the health caution zone specified by ISO 2631-1 during their day-to-day activities (0.83 ± 0.17 m/second(2), weighted root-mean-squared acceleration, for 13.07 ± 3.85 hours duration of exposure). WCs with suspension did not attenuate vibration transmitted to WC users (V = 0.180, F(8, 56) = 0.692, P = 0.697). Conclusions WBV exposure to WC users exceeds international standards. Suspension systems need to be improved to reduce vibrations transmitted to the users.
本研究旨在评估社区中轮椅使用者的全身振动（WBV）暴露情况，并确定轮椅框架类型（折叠式、刚性和悬架式）对减少传递至人体的WBV的效果。
一项关于轮椅使用者WBV暴露水平的观察性病例对照研究。
37名无压疮、年龄在18岁及以上且能够独立转移的轮椅使用者。
通过使用定制的振动和活动数据记录器，对轮椅使用者进行为期2周的监测，以收集WBV暴露情况以及活动水平。使用ISO 2631-1方法评估振动水平。
参与本研究的所有轮椅使用者在日常活动期间，座位处的WBV水平持续处于或高于ISO 2631-1规定的健康警示区（加权均方根加速度为0.83±0.17米/秒²，暴露持续时间为13.07±3.85小时）。悬架式轮椅并未减弱传递至轮椅使用者的振动（V = 0.180，F(8, 56) = 0.692，P = 0.697）。结论轮椅使用者的WBV暴露超过国际标准。需要改进悬架系统以减少传递至使用者的振动。
