A NEW TRANSIENT BIO-HEAT MODEL OF THE HUMAN BODY
A NEW TRANSIENT BIO-HEAT MODEL OF THE HUMAN BODY
复制标题
一种新的人体瞬态生物热模型
DOI：
--
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
K. Ghali
中科院分区：
文献类型：
--
作者：
M. Salloum;N. Ghaddar;K. Ghali
基于改进的Stolwijk模型，建立了一个新的数学多分段模型，用于预测人体在身体各部分和环境中的热和调节反应。被动式模型将人体分割成15个圆柱形部分。每个身体部位分为核心、皮肤、动脉、静脉四个节点。身体各节点通过对流、灌注和传导相互作用。在任何身体要素中，从动脉流出并流入毛细血管的血液分为核心血流（在核心内灌注换热）和皮肤层血流（在皮肤内灌注换热）。该模型根据人体动脉的精确生理数据、实际尺寸和解剖位置计算血液循环流速。循环系统模型考虑了大动脉内脉动血流及其对对流热输送的影响。基于动脉系统模型和心率计算的组织和皮肤的血液灌注在当前模型中是独一无二的。生物热人体模型能够准确预测人体的瞬态生理反应，如人体皮肤、鼓室和核心温度、出汗率以及身体各个部位的干热和潜热损失。在各种环境条件和活动下，将裸体模型预测与已发表的理论和实验数据进行比较。该模型与瞬态热暴露实验数据吻合较好。裸人体模型的全身热量增益或损失精度低于8%，皮肤温度值精度为±0.48°C。ASME版权所有©2005
A new mathematical multi-segmented model based on an improved Stolwijk model is developed for predicting nude human thermal and regulatory responses within body segments and the environment. The passive model segments the body into the 15 cylindrical parts. Each body part is divided into four nodes of core, skin, artery blood, and vein blood. The body nodes interact with each other through convection, perfusion and conduction. In any body element, the blood exiting the arteries and flowing into the capillaries is divided into blood flowing in the core (exchanges heat by perfusion in the core) and blood flowing into the skin layer (exchanges heat by perfusion in the skin). The model calculates the blood circulation flow rates based on exact physiological data of Avolio [1], real dimensions, and anatomic positions of the arteries in the body. The circulatory system model takes into consideration the pulsatile blood flow in the macro arteries with its effect on the convective heat transport. The inclusion of calculated blood perfusion in both the tissue and the skin, based on the arterial system model and the heart rate is unique for the current model. The bio-heat human model is capable of predicting accurately nude human transient physiological responses such as the body’s skin, tympanic, and core temperatures, sweat rates, and the dry and latent heat losses from each body segment. The nude body model predictions are compared with published theoretical and experimental data at a variety of ambient conditions and activity. The current model agrees well with experimental data during transient hot exposures. The nude human model has an accuracy of less than 8% for the whole-body heat gains or losses and ±0.48°C for skin temperature values.Copyright © 2005 by ASME
DOI：
10.1115/1.1392318
发表时间：
2001-10-01
影响因子：
1.7
作者：
Craciunescu, OI;Clegg, ST
通讯作者：
Clegg, ST