Title :
Dual-Row Needle Arrays Under an Electromagnetic Thermotherapy System for Bloodless Liver Resection Surgery
Author :
Huang, Sheng Chieh ; Chang, Yi Yuan ; Chao, Ying Jui ; Shan, Yan Shen ; Lin, Xi Zhang ; Lee, Gwo Bin
Author_Institution :
Dept. of Power Mech. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
3/1/2012 12:00:00 AM
Abstract :
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 300°C 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 120°C 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.
Keywords :
cellular biophysics; liver; stainless steel; surgery; tissue engineering; Lan-Yu pigs; bloodless liver resection surgery; bloodless tissue resection; cell apoptosis; dual-row needle arrays; effective coagulation area; electromagnetic thermotherapy system; feedback temperature control system; high-frequency alternating magnetic field; induction coils; magnetic materials; specific treatment protocol; stainless-steel needles; surgical modality; temperature 120 degC; temperature distribution; tissue coagulation; wide ablation zone; Coagulation; Coils; Liver; Needles; Surgery; Temperature control; Temperature measurement; Alternating magnetic field; hyperthermia; liver resection; needles array; Animals; Blood Loss, Surgical; Electromagnetic Fields; Equipment Design; Hepatectomy; Hyperthermia, Induced; Liver; Magnetics; Models, Animal; Needles; Swine;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2011.2180381