利用头颈部冷疗新模型对其疗效的理论分析  

Numerical Analysis of Hypothermia Effects in the Head and Neck by a New Model

作　　者：夏翔[1] 程曙霞[1] 赵刚[2] 

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230027 [2]中国科技大学近代力学系,安徽合肥230027

出　　处：《航天医学与医学工程》2008年第6期488-493,共6页Space Medicine & Medical Engineering

基　　金：国家自然科学基金资助项目(50406013;50506029);安徽省自然科学基金资助项目(070413099)

摘　　要：目的考虑椎动脉的影响,改进人体颈部传热模型。方法根据实验测量的尺寸数据建立模型,然后通过数值模拟的方法,研究颈部外表面处于室温以及冷疗状态下,颈部血管沿着轴向的温度分布,并且将新模型下的计算结果和惯用模型的相应结果进行了比较。结果椎动脉在供给脑部血液的过程中起着比较重要的作用,而且相对于其他颈部动脉,通过冷却椎动脉的血液温度能更有效地降低进入"Willis环"前的动脉血温度。结论这些结果对于通过使用颈部恒温冷套以求实现脑颈部降温的医疗方案提供了一定的可行性理论依据。Objective To develop a new vascular heat transfer model in the neck to analyze temperature field affected by vertebral artery. Methods With numerical simulation based on the experimental dimension data, a new model along the axial temperature distributions of blood vessels of neck was established as neck surface under normal temperature condition and during hypothermia therapy. In addition, the results were compared with those based on conventional models without vertebral arteries considered. Results It was showed that vertebral arteries played an essential role in the process of transporting blood to the brain, and it was more effective to cool the vertebral arterial blood than any other major cervical arteries in order to cool the blood before entering the Circle of Willis. Conclusion All the results obtained in this study may offer some theoretical supports to the medical proposal to cool down the brain by hypothermia therapy, for example, by covering the head and neck with ice helmet.

关 键 词：平行逆流血管 血液灌注率 椎动脉 生物传热模型 

分 类 号：R318.52[医药卫生—生物医学工程]