Lee R C, Kolodney M S
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge.
Plast Reconstr Surg. 1987 Nov;80(5):663-71.
The thermal response of the human upper extremity to large electric currents was examined using an axisymmetric unidimensional model containing bone, skeletal muscle, fat, and skin in coaxial cylindrical geometry. Appropriate thermal and electrical properties were assigned to each tissue, and the tissue response to joule heating was determined by a finite-element numerical technique. We found that when the tissues are electrically in parallel, skeletal muscle sustained the largest temperature rise and then heated adjacent tissues. Thus, when bone is not in series with other tissues, joule heating of bone is unlikely to be responsible for thermal damage to adjacent tissue. In addition, the effect of tissue perfusion on the thermal response was found to be essential for rapid cooling of the centrally located tissues.
利用一个包含骨骼、骨骼肌、脂肪和皮肤的轴对称一维模型，采用同轴圆柱几何结构，研究了人体上肢对大电流的热响应。为每个组织赋予了适当的热学和电学特性，并通过有限元数值技术确定了组织对焦耳热的响应。我们发现，当组织处于电并联时，骨骼肌的温度上升幅度最大，然后加热相邻组织。因此，当骨骼不与其他组织串联时，骨骼的焦耳热不太可能对相邻组织造成热损伤。此外，发现组织灌注对热响应的影响对于位于中心位置的组织的快速冷却至关重要。
