The treatment of arterial blood temperature in bioheat transfer equation

• Published in: Nihon Haipāsāmia Gakkai shi Vol. 5; no. 1; pp. 67 - 74
• Main Authors: Kobayashi, Yoshio, Koda, Fumiaki, Ishida, Tetsuya, Uchida, Nobue, Fujita, Yasuhiko, Kato, Hirokazu, Furukawa, Masahiko, Kasai, Toshifumi
• Format: Journal Article
• Language: English
• Published: Japanese Society for Thermal Medicine 1989
• Subjects: Arterial blood temperature; Capacitive type heating; Tolerable thickness of subcutaneous fat layer; Whole body hyperthermia
• ISSN: 0911-2529; 1881-9516
• DOI: 10.3191/thermalmedicine.5.67

In the calculation of the bioheat transfer equation, core temperature is usually introduced into the temperature of the arterial blood flowing into a tissue. However, in regional heating such as capacitive type heating for deep seated tumors, the nomal tissue surrounding it is also heated to some extent, and the arterial blood flowing into the tumor gains heat from the normal tissue before it reaches the tumor. We calculated the bioheat transfer equation under the conditon that the fat-muscle-tumor-muscle-fat model was heated by capacitive type heating. When the temperature of the arterial blood flowing into the tumor was taken to be 37 °C, the tolerable thickness of the fat layer against over-heating was estimated to be 1.0 cm, but, when the temperature of it was taken to be the temperature at the boundary of the tumor, the tolerable thickness of the fat layer was estimated to be 1.6 cm. The calculation also indicated that the tolerable thickness of the fat layer became thicker when the whole body hyperthermia was combined with capacitive type heating.