Cartilage stress characteristics on knee osteoarthritis musculoskeletal model of kidney and blood stasis
10.3760/cma.j.issn.1673-4181.2015.05.004
- VernacularTitle:肾虚血瘀型膝骨性关节炎肌骨模型的膝关节软骨表面应力特征分析
- Author:
Aifeng LIU
;
Shuo YANG
;
Kaiyuan PEI
- Publication Type:Journal Article
- Keywords:
Knee osteoarthritis;
Kidney and blood stasis;
Cartilage stress characteristics
- From:
International Journal of Biomedical Engineering
2015;38(5):271-274,后插5
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish musculoskeletal model and finite element model of kidney and blood stasis type knee osteoarthritis (KOA),and to analyze the cartilage stress characteristics of kidney and blood stasis type KOA.Methods Data from knee CT,MRI of kidney and blood stasis type KOA volunteers was used to construct musculoskeletal model and finite element model based on AnyBody and ANSYS software.Surface electromyogram (sEMG) verification and mutual verification were conducted.KOA bone stress and strain parameters were observed at the moving angles of 0°,-40°,-90°,-180° of the KOA musculoskeletal model,in order to explore the cartilage stress characteristics.Results When the positions of kidney and blood stasis type KOA patients varied from standing to squatting,the knee cartilage surface stress revealed a nonlinear increasing trend.Kidney and blood stasis KOA patient's knee cartilage stress near the distal end was significant different from that of normal subjects (P＜0.05),while the KOA patient's knee cartilage stress near the distal end and proximal front side had no significant differences with that of normal subjects (P＞0.05).Conclusions For kidney and blood stasis type of patients with KOA,cartilage surface stress displays a nonlinear increasing trend along with the stress concentration at the motion cartilage surface,which is consistent with the clinical features.
