Loads on a vertebral body replacement during locomotion measured in vivo
Loads on a vertebral body replacement during locomotion measured in vivo
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DOI：
10.1016/j.gaitpost.2013.10.010
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发表时间：
2014-02-01
期刊：
影响因子：
2.4
通讯作者：
Bergmann, G.
中科院分区：
文献类型：
--
作者：
Rohlmann, A.;Dreischarf, M.;Bergmann, G.
步行是日常生活中最重要的活动之一，步行会使脊柱承受大量的负荷循环。关于步行时脊柱负荷知之甚少。遥测脊柱植入物可以提供有关其在不同活动期间的负载的数据。本研究的目的是测量水平行走和楼梯行走期间椎体置换 (VBR) 上的负载，并确定行走速度和使用助行器的影响。遥测 VBR 被植入 5 名患有 L1 或 L3 腰椎椎体压缩性骨折的患者中。植入物允许测量三个力和三个力矩分量。在水平行走和楼梯行走、在跑步机上以不同速度行走以及使用轮式残疾人助行器或拐杖时测量 VBR 上的合力。平均而言，水平行走时 VBR 上的合力是站立值的 171%。上楼梯时该力值增加到站立力的 265%，下楼梯时增加到站立力的 225%。行走速度对植入力有很大影响。在平地上行走时使用助行器可将植入物上的受力减少至站立力的 62%，而使用两根拐杖的影响很小。步行对 VBR 造成的力比站立时大得多。使用助行器可以大幅减少受力。 (C) 2013 Elsevier B.V. 保留所有权利。
Walking is one of the most important activities in daily life, and walking exposes the spine to a high number of loading cycles. Little is known about the spinal loads during walking. Telemeterized spinal implants can provide data about their loading during different activities. The aim of this study was to measure the loads on a vertebral body replacement (VBR) during level and staircase walking and to determine the effects of walking speed and using walking aids.Telemeterized VBRs were implanted in five patients suffering from compression fractures of the L1 or L3 lumbar vertebral body. The implant allows measurements of three force and three moment components. The resultant force on the VBR was measured during level and staircase walking, when walking on a treadmill at different speeds, and when using a wheeled invalid walker or crutches.On average, the resultant force on the VBR for level walking was 171% of the value for standing. This force value increased to 265% of the standing force when ascending stairs and to 225% when descending stairs. Walking speed had a strong effect on the implant force. Using a walker during ambulation on level ground reduced the force on the implant to 62% of standing forces, whereas using two crutches had only a minor effect.Walking causes much higher forces on the VBR than standing. A strong force reduction can be achieved by using a walker. (C) 2013 Elsevier B.V. All rights reserved.