کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
876205 910829 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Finite element analysis of the deformation of deep veins in the lower limb under external compression
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
پیش نمایش صفحه اول مقاله
Finite element analysis of the deformation of deep veins in the lower limb under external compression
چکیده انگلیسی

Compression devices applied to the lower limb can help improve venous flow by deforming the muscles and veins. In this study, a two-dimensional finite element model using displacement boundary conditions was employed to simulate the deformations of deep veins in the calf under external compression. Magnetic resonance (MR) scans were performed on four healthy volunteers with and without compression stockings. The displacement boundary condition was extracted from the corresponding deformed (with stocking) and undeformed (without stocking) MR images by using a non-rigid image registration procedure. In the finite element model, soft tissues of the calf were simplified as a homogenous material with hyperelastic properties. The effective bulk modulus of the material was evaluated at a chosen transverse section for each subject, which was also applied to three other locations at 2 mm, 6 mm and 10 mm below the original section. Comparison between the simulation and measurement showed good agreement in area reduction of deep veins (discrepancy = 8.7 ± 6.4%), especially for sections close to the chosen location where the effective bulk modulus was evaluated. Beyond a certain distance, the discrepancies increased and became quite variable. The reason for this is that the architecture and stiffness of the calf tissues vary along the leg. The results also showed considerable variation in effective bulk modulus among the four subjects examined.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medical Engineering & Physics - Volume 35, Issue 4, April 2013, Pages 515–523
نویسندگان
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