利用有限元分析研究常见儿科跌倒致股骨骨折的可能性。
Investigation of femur fracture potential in common pediatric falls using finite element analysis.
机构信息
Department of Bioengineering, University of Louisville, Louisville, KY, USA.
Department of Engineering Fundamentals, University of Louisville, Louisville, KY, USA.
出版信息
Comput Methods Biomech Biomed Engin. 2021 Apr;24(5):517-526. doi: 10.1080/10255842.2020.1837119. Epub 2020 Oct 29.
A finite element (FE) model of an 11-month-old child's femur was developed to evaluate fracture risk in short-distance feet-first falls and bed falls. Pediatric material properties were applied to the FE model. Femur loading was derived from previously conducted fall experiments using a child surrogate where fall conditions (e.g., fall height, impact surface) were varied. Fracture thresholds based on principal stress and strain were used to examine potential for fracture. Peak stress/strain were significantly greater for feet-first falls from greater heights and onto harder impact surfaces. Feet-first falls exceeded some, but not all fracture thresholds. Bed falls did not exceed any fracture thresholds.
建立了一个 11 个月大婴儿股骨的有限元（FE）模型，以评估短距离足先着地跌倒和床坠落的骨折风险。将儿科材料特性应用于 FE 模型。股骨的加载是从先前使用儿童替身进行的跌倒实验中得出的，其中改变了跌倒条件（例如，跌倒高度、冲击表面）。基于主应力和应变的骨折阈值用于检查潜在的骨折风险。从更高的高度和更硬的冲击表面足先着地的跌倒会导致峰值应力/应变显著增加。足先着地的跌倒超过了一些但不是所有的骨折阈值。床坠落没有超过任何骨折阈值。
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