Sirindhorn School of Prosthetics and Orthotics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Department of Exercise and Sport Science, St. Mary's University, San Antonio, TX, USA.
Ann Med. 2024 Dec;56(1):2380798. doi: 10.1080/07853890.2024.2380798. Epub 2024 Jul 26.
This study aimed to evaluate the pressure distribution and comfort of transtibial prosthesis wearers using an affordable ethyl-vinyl acetate (EVA) roll-on (AERO) liner.
Fifteen unilateral transtibial prosthesis users wore patella tendon bearing (PTB) sockets with a polyethylene foam (PE-lite) liner were enrolled this study. AERO liners were provided to all participants. Six force sensors were applied to the residual limb to evaluate pressure distribution during treadmill walking, and the socket comfort score (SCS) was used to evaluate comfortability. Fourier transform infrared (FT-IR) spectroscopy was performed on the EVA and PE-lite liners.
Eleven participants used prefabricated AERO liners and four participants used custom-made AERO liners. The pressure distribution was analysed by the coefficient of variation (CV): PE-lite was 75.7 ± 6.0 and AERO liner 83.3 ± 4.1. Residual limb pressure was significantly decreased when using the AERO liner ( = .0007), with a large effect size ( = 0.87). Mean SCS was 7.5 ± 1.3 and 8.9 ± 1.1 for PE-lite and AERO liner respectively.
Better pressure distribution and comfort were observed when the participants used the AERO liner. AERO had a greater proportion of calcium carbonate (CaCO). These findings suggest that the AERO liner is a better off-the-shelf option for persons using traditional prosthetic sockets and liners.
本研究旨在评估使用经济实惠的乙烯-醋酸乙烯共聚物（EVA）滚动式（AERO）衬垫对胫骨假体佩戴者的压力分布和舒适度的影响。
本研究纳入了 15 名单侧胫骨假体佩戴者，他们均佩戴髌韧带承重（PTB）式接受腔和聚乙烯泡沫（PE-lite）衬垫。所有参与者均提供了 AERO 衬垫。在跑步机行走过程中，将六个压力传感器应用于残肢以评估压力分布，并使用套接舒适评分（SCS）评估舒适度。对 EVA 和 PE-lite 衬垫进行傅里叶变换红外（FT-IR）光谱分析。
11 名参与者使用预制的 AERO 衬垫，4 名参与者使用定制的 AERO 衬垫。通过变异系数（CV）分析压力分布：PE-lite 为 75.7±6.0，AERO 衬垫为 83.3±4.1。使用 AERO 衬垫时，残肢压力显著降低（ = .0007），效应量较大（ = 0.87）。PE-lite 和 AERO 衬垫的平均 SCS 分别为 7.5±1.3 和 8.9±1.1。
参与者使用 AERO 衬垫时，观察到更好的压力分布和舒适度。AERO 衬垫中碳酸钙（CaCO）的比例更高。这些发现表明，对于使用传统假肢接受腔和衬垫的人来说，AERO 衬垫是更好的现成选择。
