Modelling an adult human head on a donut-shaped gel head support for pressure ulcer prevention
Modelling an adult human head on a donut-shaped gel head support for pressure ulcer prevention
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DOI：
10.1111/iwj.13203
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发表时间：
2019-08-26
影响因子：
3.1
通讯作者：
Gefen, Amit
中科院分区：
文献类型：
--
作者：
Katzengold, Rona;Gefen, Amit
静止的患者在其身体与支撑表面之间的接触区域处承受长时间的压力和剪切载荷，随着时间的推移，这可能导致压疮（PU）。环形凝胶头支架通常用于保护枕骨，枕骨是PU最常见的解剖部位之一;然而，这些器械的生物力学有效性尚不清楚。为了研究它们对头皮组织的影响，我们使用了成人头部的三维解剖学上真实的有限元模型，其中我们添加了甜甜圈形状的凝胶头部支撑。然后，我们比较了使用甜甜圈形凝胶头部支撑件时枕骨头皮组织载荷的发生率，以及与fluored头部定位器和标准医用泡沫相关的枕部头皮组织载荷的发生率。与其他定位器相比，甜甜圈形凝胶头支架对组织机械应力的暴露最大，特别是高（因此是危险的）应力域。我们得出的结论是，虽然甜甜圈形状的凝胶头部支撑件旨在避免组织载荷远离枕骨并将其分散到周围环境中，但在实践中，它未能做到这一点。事实上，甜甜圈形状的凝胶头部支撑件施加头部重量力以通过头皮组织的相对狭窄的环转移，因此增加了发展枕部PU的风险。Key Messagesa甜甜圈凝胶头托旨在减少头皮组织压疮的发生，以研究甜甜圈凝胶头托对头皮组织的影响，我们已经使用了成人头部的解剖学上真实的计算模型，甜甜圈形状的凝胶头部支撑件使头部-通过头皮组织的相对狭窄的环传递的重力
Patients who are stationary endure prolonged pressures and shear loads at contact areas between their body and the support surface, which over time may cause pressure ulcers (PUs). Donut-shaped gel head supports are commonly used to protect the occiput, which is among the most common anatomical sites for PUs; however, the biomechanical efficacy of these devices is unclear. To investigate their effects on scalp tissues, we have used our three-dimensional anatomically realistic finite element model of an adult head, to which we have added a donut-shaped gel head support. We then compared the occipital scalp tissue loads' occurrence while the donut-shaped gel head support is in use with those associated with a fluidised head positioner and a standard medical foam. The donut-shaped gel head support inflicted the greatest exposure to tissue mechanical stresses, particularly to the high (and therefore dangerous) stress domain, when compared to the other positioners. We concluded that while the donut-shaped gel head support is designed to avert tissue loads away from the occiput and disperse them to the surroundings, in practice, it fails to do so. In fact, the donut-shaped gel head support imposes the head-weight forces to transfer through a relatively narrow ring of scalp tissues, hence increasing the risk of developing occipital PUs. Key Messagesa donut-shaped gel head support is meant to reduce the occurrence of pressure ulcers in scalp tissues to investigate the effects of donut-shaped gel head support on scalp tissues, we have used our anatomically realistic computational model of an adult head the donut-shaped gel head support imposes the head-weight forces to transfer through a relatively narrow ring of scalp tissues the highly distorted and deformed tissues at that ring are at a high risk for injury