Electromagnetic thermotherapy system for minimal invasive surgery and organ resection surgery

• Main Authors: Sheng-ChiehHuang, 黃聖傑
• Other Authors: Gwo-Bin Lee
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/12491082394969089902

碩士 === 國立成功大學 === 工程科學系碩博士班 === 98 === Cancer and trauma are still major threats to people, and therapy for these threats needs further improvement. The use of electromagnetic thermotherapy systems in surgery offers new hope for these patients. We conducted in vitro and in vivo experiments to assess the feasibility of this new form of thermotherapy. In our experiments, a two-part needle was used for minimal invasive surgery, and a needles array was used for organ resection surgery. We developed a system which can generate a high-frequency alternation magnetic field designed to induce a localized temperature increase induced by inserting needles into the target tissue. To prevent overheating, a feedback temperature control system was successfully developed to keep the needles at a constant temperature. First, for in vitro tests, the relationship between the coagulation zone and the temperature and time factors were investigated. The needles were coated with Teflon to prevent them from sticking to the tissue. By using a feedback temperature control system, the needles could be heated up to specific temperatures, 42, 60 and 80oC, respectively. With this approach, we found the temperature and time necessary for coagulation in both minimal invasive surgery and in organ resection surgery. For in vivo tests, in an internal medicine environment, a New Zealand white rabbit’s liver was coagulated using a two-part needle. In the organ resection surgery, the liver of a New Zealand white rabbit and a Lan-Yu pig’s liver, spleen and pancreas were resected using the needle array. The experiments showed that by inserting the two-part needle and needles array into the target tissue, applying our electromagnetic thermotherapy system resulted in coagulation in the liver and resection of the organs without bleeding, which is very promising for further clinical use.