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	A Non-linear contact FE Model to Evaluate Pressure Ulcer on Buttock-thigh under Sitting
	Peng Shang; Xueling Bai
	2012
会议名称	IEEE-EMBS International Conference on Biomedical and Health Informatics, BHI 2012.
会议地点	Hong Kong and Shenzhen, China
英文摘要	Pressure ulcer (PU) is one of the most common but serious medical complications experienced by people who rely on wheelchairs. Many previous finite element (FE) models related to buttock ignored the complexity including the anatomical geometry, non-linear property between skin and cushion and real physiological loading. In this investigation, a three-dimensional (3D) comprehensive FE model derived from MRI images under sitting was constructed to evaluate PU. Contact property between skin and cushion and physiological loading were considered in the model. The result shows that high pressure of 86-180 kPa in muscle under ischial tuberosity (IT) was predicted in our investigation, bigger than that of 50-80 kPa in skin and that of 40-50 kPa in fat. While differing from other literatures, the von-Mises stress of 80-120 kPa in skin was bigger than that of 10-30 kPa in fat and that of 30-50 kPa in muscle. The maximum frictional shear stress contributing to superficial pressure ulcer in anterior-posterior direction occurs just beneath the IT with the range of 3.9-6.5 kPa. In conclusion, the non-linear contact FE model proves valid in predicting mechanical response of superficial and internal tissues under sitting.
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/4135]
专题	深圳先进技术研究院_医工所
作者单位	2012
推荐引用方式 GB/T 7714	Peng Shang,Xueling Bai. A Non-linear contact FE Model to Evaluate Pressure Ulcer on Buttock-thigh under Sitting[C]. 见:IEEE-EMBS International Conference on Biomedical and Health Informatics, BHI 2012.. Hong Kong and Shenzhen, China.

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