Background

Residual limb volume loss is a source of prosthetic socket fit problems in people with lower-limb amputation. The aim of this study was to investigate a novel volume recovery strategy for people with trans-tibial amputation.

Methods

Test sockets for people with trans-tibial amputation were created that allowed panels of an adjustable socket and the underlying elastomeric liner to be pulled radially outward, using small motors mounted to the socket. One Control and one Intervention session were conducted with each participant. During Intervention sessions, panel-pull was executed during the sits of a multi-cycle sit/walk protocol. No panel-pull was executed during the Control sessions. Residual limb fluid volume was monitored in anterior and posterior regions using bioimpedance analysis.

Findings

Results from 12 participants demonstrated that short-term (12 min after the intervention was applied) median posterior residual limb fluid volume change for Intervention (0.44%) was higher than that for Control (−0.02%) (P = .015). Long-term (40 min after the intervention was applied) median posterior residual limb fluid volume change for Intervention (0.95%) was higher than that for Control (−0.26%) (P = .002).

Interpretation

If a panel-pull mechanism that was easy to assemble and operate could be created, then panel-pull may be an effective accommodation strategy to reduce daily limb volume loss in trans-tibial prosthesis users.

中文翻译：

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在休息过程中积极增加窝槽容积是否有助于跨胫假体使用者恢复剩余肢体液容量？

背景

下肢截肢患者的残肢体积损失是假体承窝配合问题的源头。这项研究的目的是研究经胫截肢患者的一种新颖的容量恢复策略。

方法

创建了适用于胫骨截肢患者的测试插座，该插座允许使用安装在插座上的小型电机将可调节插座的面板和下面的弹性衬里径向向外拉。每个参与者进行了一次控制和一次干预会议。在干预会议期间，面板拉动是在多周期就座/行走协议的座席期间执行的。在控制会话期间未执行任何面板拉动。使用生物阻抗分析监测前后区域的肢体残液量。

发现

12名参与者的结果表明，短期（应用干预后12分钟）干预的中位后肢残液量中位数变化（0.44％）高于对照组（-0.02％）（P  = .015）。长期（应用干预后40分钟），干预的中位后肢残液量中位数变化（0.95％）高于对照组（-0.26％）（P  = .002）。

解释

如果可以创建一种易于组装和操作的面板拉动机构，那么面板拉动可能是一种有效的调节策略，可减少经胫骨假体使用者日常肢体体积损失。