Dual-row needle arrays under an electromagnetic thermotherapy system for bloodless liver resection surgery

Sheng Chieh Huang, Yi Yuan Chang, Ying Jui Chao, Yan Shen Shan, Xi Zhang Lin, Gwo Bin Lee

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Electromagnetic thermotherapy has been extensively investigated recently and may become a new surgical modality for a variety of medical applications. It applies a high-frequency alternating magnetic field to heat up magnetic materials inserted within the human body to generate tissue coagulation or cell apoptosis. Using a new procedure with dual-row needle arrays under an electromagnetic thermotherapy system with a feedback temperature control system, this study demonstrates bloodless porcine liver resection, which is challenging using existing methods. In vitro experiments showed that hollowed, stainless-steel needles could be heated up to more than 300C within 30 s when centered under the induction coils of the electromagnetic thermotherapy system. In order to generate a wide ablation zone and to prevent the dual-row needle arrays from sticking to the tissue after heating, a constant temperature of 120C was applied using a specific treatment protocol. The temperature distribution in the porcine livers was also measured to explore the effective coagulation area. Liver resection was then performed in Lan-Yu pigs. Experimental results showed that seven pigs underwent liver resection without bleeding during surgery and no complications afterward. The dual-row needle arrays combined with the electromagnetic thermotherapy system are thus shown to be promising for bloodless tissue resection.

Original languageEnglish
Article number6108353
Pages (from-to)824-831
Number of pages8
JournalIEEE Transactions on Biomedical Engineering
Issue number3
Publication statusPublished - 2012 Mar

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering


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