The Quasi-Linear Viscoelastic Properties of Diabetic and Non-Diabetic Plantar Soft Tissue

摘要: The purpose of this study was to characterize the viscoelastic behavior diabetic and non-diabetic plantar soft tissue at six ulcer-prone/load-bearing locations beneath foot determine any changes that may play a role in ulcer formation subsequent amputation predisposed population. Four older four control fresh frozen cadaveric feet were each dissected isolate specimens from hallux, first, third, fifth metatarsals, lateral midfoot, calcaneus. Stress relaxation experiments used quantify properties by fitting data quasi-linear (QLV) theory using two methods, traditional frequency-insensitive approach an indirect frequency-sensitive approach, measuring several additional parameters raw including rate amount overall relaxation. stress response both unexpectedly similar accordingly few QLV for either fit none differed. Likewise, no differences found between locations. accuracy methods comparable, however, neither predicted ramp behavior. Further, coefficients varied considerably one method other, making it hard discern meaningful trends. Future testing alternate loading modes intact provide more insight into time-dependent ulceration.