04aE09P
医療用低侵襲プラズマの特性計測
Characteristic measurement of the minimally invasive plasma for the medicalapplication
山田大将1、金載浩2、榊田創1,2、池原譲3、久保田昭貴子2、木山學2、山岸祐介1、藤原正純2、池原早苗3、中西速夫4、清水伸幸5、一瀬雅夫6、丹羽徹7
12
HIROMASA YAMADA 、JAEHO KIM 、HAJIME SAKAKITA1,2、YUZURU IKEHARA 3、AKIKO KUBOTA 2、SATORU KIYAMA 2、YUSUKE YAMAGISHI 1、MASANORI FUJIWARA 2、SANAE IKEHARA 3、HAYAO NAKANISHI 4、NOBUYUKI SHIMIZU 5、
MASAO ICHINOSE 6、TORU NIWA 7
1筑波大院システム情報, 2産総研エネルギー技術, 3産総研糖鎖医工学、4愛知県がんセンター研究所, 5山王病院, 6和歌山県立医科大学、7橋本市民病院
Graduate School of Systems and Information Engineering at the University of Tsukuba, 2 Energy Technology Research Institute ,NationalInstitute of Advanced Industrial Science and Technology,3 Research Center for Medical Glycoscience , National Institute of Advanced
Industrial Science and Technology, 4Aichi Cancer Center Research Institute, 5 Sanno Hospital, 6Wakayama Medical University, 7Hashimoto
Municipal Hospital
11. Introduction
In surgical procedures, universally high-frequency
electrical coagulator has been used for the hemostasis on
the capillary tube. One of the plasma technologies
effectively used in medical application is the argon
plasma equipment for blood coagulation called as anargon plasma coagulator (APC), which performs anablation of residual tumor and hemostasis under theendoscopic treatment [1]. However, those equipments
absolutely induce burning or tissue damage caused by
the heat. These injuries have possibilities to induce
postoperative disorders. Therefore, to improve theinvasiveness during the treatment, i.e., to reduce tissue
damage, we have newly developed a medical electricalequipment utilizing low temperature plasma production
technique [2]. This equipment can reduce tissue damage
without impairment of the hemostatic effect [3], and therisk of postoperative disorders. Then, this medical
plasma equipment is defined as “a minimally invasive
plasma (MP)” for blood coagulation.
In the present study, to measure the characteristics ofthe MP, a near-infrared spectrometer system is prepared.
2. Experimental Setups
Specifications of the spectrometer system are as
follows: focal length, f = 303 mm, a grating of 300
grooves/mm, Au coated reflection mirrors, high sensitive
InGaAs photodiode array (512 pixels), low OH quartz
optical fiber of 400 core diameter. In this experiment,
the wavelength region from 1200 nm to 1350 nm isscanned. Wavelength resolution is 0.26 nm at 1200 nm.
A cut filter of secondary light less than 700 nm is
attached in front of a focusing lens of the fiber. In thisstudy, as MP, dielectric barrier discharge based plasma
equipment is adopted [2]. As a high temperature plasma,an argon plasma coagulator is introduced (ERBE
Elektromedizin GmbH, Germany). Experimental
arrangements are illustrated in Fig. 1.
Here, a visible emission light between nozzle exit of theequipment and copper target plate is defined as “plasmaflare”.
3. Experimental Results
In the case of MP using argon gas irradiation to thecopper plate, almost every detected spectral lines arecorresponded to ArI emission. The emission intensity isdivided by the exposure time of photodiode array.
In contrast, in the case of APC irradiation to thecopper plate, dominant spectral lines are also
corresponded to ArI emission. However, weak spectralline of OI (1316.4 nm) is measured. It can be consideredthat the energy of APC is larger than that of MP.
Furthermore, in the case of minimally invasive plasmausing a helium gas, the spectral lines show specificfeatures.
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.
References[1] K.E. Grund et al., Endosope Surgery 2 (1994) 42.
[2] H. Sakakita, Y. Ikehara, and S. Kiyama, Plasma
Irradiation Treatment Device, WO2012/005132 (2011).
[3] H. Sakakita and Y. Ikehara, Plasma Fusin Res. 5(2010) S2117-1.

Fig. 1. Schematic drawing of a measurement system of
the near-infrared emission light.