2013 Fiscal Year Final Research Report
Clarificaiton of Cuase of Occurrence and Biomechanism of Pressure Ulcer by Image-based Finite Element Method
| Project/Area Number |
23656092
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Keio University |
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Principal Investigator |
TAKANO NAOKI 慶應義塾大学, 理工学部, 教授 (10206782)
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| Co-Investigator(Kenkyū-buntansha) |
NAGASAO Tomohisa 慶應義塾大学, 医学部, 准教授 (20245541)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 有限要素法 / モンテカルロ法 / 裾野確率 / サンプリング法 / 褥瘡 / 看護・介護 / イメージベースモデリング / 界面切欠き |
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| Research Abstract |
It is important to clarify the fundamental cause of occurence of pressur ulcer to improve the nursing care for its prevention. Based on the hypothesis that the initial cause of pressur ulcer lies in the damage of fibril tissue at the interface between bone and muscle in the human buttock, in this study, interfacial strain analysis was carried out by image-based finite element method and the biomechanism was discussed. An original computational method has been developed to find the pair of parameters that lead to high strain value in the Monte Carlo simulation considering the uncertainties in 7 parameters. They are the mechanical properties of fat and muscle, volume fraction of fat, location and size of damage and positioning. The numerical results implied that the risk of fibril tissue damage due to shear strain increased if the Young's moduli of fat and muscle are low for such patient that has high volume fraction of fat, lying on bed in supine position.
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