04pB04
プラズマ技術を用いた医用電気機器の特性
Characteristics of the medical electrical equipment using plasma technologies
金載浩 1、榊田創 1,3、池原譲 2、山田大将 3、山岸祐介 3、木山學 1、久保田昭貴子 1、一瀬雅夫 4、丹羽徹 5、清水伸幸 6、池原早苗 2、中西速夫 7
KIM Jaeho1, SAKAKITA Hajime1,3, IKEHARA Yuzuru2, YAMADA Hiromasa3,
YAMAGISHI Yusuke3, KIYAMA Satoru1, KUBOTA Akiko1, ICHINOSE Masao4,
NIWA Toru5, SHIMIZU Nobuyuki6, IKEHARA Sanae2, NAKANISHI Hayao7
1 産総研エネルギー技術, 2 産総研糖鎖医工学、3 筑波大院システム情報,
4 和歌山県立医科大学、5 橋本市民病院、6 山王病院, 7 愛知県がんセンター研究所1 Energy Technology Research Institute, AIST, 2 Research Center for Medical Glycoscience, AIST,
3 Graduate School of Systems and Information Engineering, Univ. of Tsukuba, 4 Wakayama
Medical Univ., 5 Hashimoto Municipal Hospital, 6 Sanno Hospital, 7 Aichi Cancer Center
Recently, atmospheric pressure plasmas havebeen attracting special attentions for biomedical
applications including blood coagulation [1]. The
argon plasma coagulator (APC), which is anequipment intended for thermal coagulation oftissues, has been practically used in an endoscopic
submucosal desection (ESD), ablation of residualtumor cells and control bleeding [2]. However,there are some risks of occurring carbonization,
vaporization and deep tissue injuries withprolonged application [3]. To overcome problems
from these thermal tissue damages, a nonthermal
atmospheric pressure plasma with a high level ofnonequilibrium has been considered as analternative technique of high temperature plasma.
The medical plasma equipment using the
low-temperature atmospheric plasma is defined as“a minimally invasive plasma (MP)” for blood
coagulation.
The studies on blood coagulation using adielectric barrier discharge (DBD) air plasma [4], anon-thermal air plasma torch [5] and a
microwave-excited argon plasma jet [6] have beenreported. Also we have developed the technology ofblood coagulation using an originally-designed
nonthermal plasma jet [7]. The plasma jet is basedon DBD using helium or argon gas.
In this study, we have performed experimental
comparison between an APC apparatus (ERBE
Elektromedizin GmbH, Germany) and our MP
coagulation system. In experiments, an opticalemission spectroscopy (OES) and an infrared
camera are used to analyze thermal properties ofboth plasmas. The rotational temperatures ofnitrogen molecules, which have been widely used
to investigate neutral gas temperature in plasmas [8],are measured with using the OES. The spatial

distributions of temperatures in plasma applications
are measured with using the infrared camera.
This presentation will be concerned withmotivation and latest experimental results of ourwork. In addition, we will discuss on the plasma
characteristics in a conventional APC and anonthermal atmospheric pressure plasma source forblood coagulation.
Acknowledgements
This work was supported by Grants-in-Aid for Scientific
Research on Priority Area (24108006) from the Ministryof Education, Culture, Sports, Science and Technologyof Japan.

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