Kumar Bipin, Das Apurba, Alagirusamy R
Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, PIN-110016, India.
J Biomech Eng. 2012 Sep;134(9):094501. doi: 10.1115/1.4007176.
Understanding the stress relaxation behavior of the compression bandage could be very useful in determining the behavior of the interface pressure exerted by the bandage on a limb during the course of the compression treatment. There has been no comprehensive study in the literature to investigate the pressure profile (interface pressure with time) generated by a compression bandage when applied at different levels of strain. The present study attempts to describe the pressure profile, with the use of a quasi-linear viscoelastic model, generated by a compression bandage during compression therapy. The quasi-linear viscoelastic (QLV) theory proposed by Fung (Fung, 1972, "Stress Strain History Relations of Soft Tissues in Simple Elongation," Biomechanics: Its Foundations and Objectives, Y. C. Fung, N. Perrone, and M. Anliker, eds., Prentice-Hall, Englewood Cliffs, NJ, pp. 181-207). was used to model the nonlinear time- and history-dependent relaxation behavior of the bandage using the ramp strain approach. The regression analysis was done to find the correlation between the pressure profile and the relaxation behavior of the bandage. The parameters of the QLV model, describing the relaxation behavior of the bandage, were used to determine the pressure profile generated by the bandage at different levels of strain. The relaxation behaviors of the bandage at different levels of strain were well described by the QLV model parameters. A high correlation coefficient (nearly 0.98) shows a good correlation of the pressure profile with the stress relaxation behavior of the bandage.The prediction of the pressure profile using the QLV model parameters were in agreement with the experimental data. The pressure profile generated by a compression bandage could be predicted using the QLV model describing the nonlinear relaxation behavior of the bandage. This new application of the QLV theory helps in evaluating the bandage performance during compression therapy as scientific wound care management.
了解加压绷带的应力松弛行为对于确定在加压治疗过程中绷带对肢体施加的界面压力的行为非常有用。文献中尚未有全面的研究来调查加压绷带在不同应变水平下施加时产生的压力分布（界面压力随时间的变化）。本研究试图使用准线性粘弹性模型来描述加压绷带在加压治疗期间产生的压力分布。Fung提出的准线性粘弹性（QLV）理论（Fung，1972年，《简单伸长中软组织的应力应变历史关系》，《生物力学：其基础与目标》，Y.C.Fung、N.Perrone和M.Anliker编，普伦蒂斯-霍尔出版社，新泽西州恩格尔伍德克利夫斯，第181 - 207页）。被用于使用斜坡应变方法对绷带的非线性时间和历史依赖性松弛行为进行建模。进行回归分析以找到压力分布与绷带松弛行为之间的相关性。描述绷带松弛行为的QLV模型参数被用于确定绷带在不同应变水平下产生的压力分布。QLV模型参数很好地描述了绷带在不同应变水平下的松弛行为。高相关系数（接近0.98）表明压力分布与绷带的应力松弛行为具有良好相关性。使用QLV模型参数对压力分布的预测与实验数据一致。使用描述绷带非线性松弛行为的QLV模型可以预测加压绷带产生的压力分布。QLV理论的这种新应用有助于在作为科学伤口护理管理的加压治疗期间评估绷带性能。
