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Interventional management for postoperative arterial bleeding in gastrointestinal surgery
Yozo Sato,Kiyoshi Matsueda,Marie Osawa,Yoshitaka Inaba,Yu Takahashi,Yosuke Inoue,Atsushi Oba,Yosuke Fukunaga,Yasuhiro Shimizu 소화기인터벤션의학회 2022 Gastrointestinal Intervention Vol.11 No.4
Postoperative arterial bleeding after gastrointestinal surgery is a potentially fatal complication. Transcatheter arterial embolization is considered the first-line treatment because of efficacy and less invasiveness despite the risk of organ infarction. With the recent advances in endovascular devices, stent-graft placement, which can preserve arterial flow, has been an alternative treatment option in patients with extrahepatic artery hemorrhage. Moreover, clinical outcomes of stent-graft placement for pseudoaneurysms in relative long term have been reported recently. Herein, we review the techniques and clinical outcomes for interventional management for postoperative arterial bleeding.
Interventional management for postoperative arterial bleeding in gastrointestinal surgery
Yozo Sato,Kiyoshi Matsueda,Marie Osawa,Yoshitaka Inaba,Yu Takahashi,Yosuke Inoue,Atsushi Oba,Yosuke Fukunaga,Yasuhiro Shimizu 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.4
Postoperative arterial bleeding after gastrointestinal surgery is a potentially fatal complication. Transcatheter arterial embolization is considered the first-line treatment because of efficacy and less invasiveness despite the risk of organ infarction. With the recent advances in endovascular devices, stent-graft placement, which can preserve arterial flow, has been an alternative treatment option in patients with extrahepatic artery hemorrhage. Moreover, clinical outcomes of stent-graft placement for pseudoaneurysms in relative long term have been reported recently. Herein, we review the techniques and clinical outcomes for interventional management for postoperative arterial bleeding.
Sueyoshi, Mitsuhiro,Furue, Toshihiko,Sato, Akihiro,Yokoyama, Kenichi,Yamadera, Yoshimi,Fujiwara, Kiyoshi,Matsuda, Katsuhiko 한국부식방식학회 2002 Corrosion Science and Technology Vol.31 No.5
Aluminum brass tubing which is highly cost-effective and has a high heat transfer property has been widely used for seawater cooled condenser in Japan. However, the tubing suffers from erosion and corrosion on the inner surface in spite of ferric-ion injection and cathodic protection. Ammonia also attacks the outer surface after long years of service. Periodic replacement with new tubing has been performed. Titanium tubing which has high corrosion resistance, has been used in new condensers and for the air removal zone of the condenser. However, its service has been restricted due to higher cost and lower elastic modulus. As a countermeasure, we have developed a high performance ferritic stainless steel tubing called "Super Stainless: FS1O" which has excellent corrosion resistance and is highly cost-effective. First, the tubings were used experimentally in our Buzen thermal power station, Unit 2 condenser in 1993, and various investigations have been performed on the extracted tubing and tube sheet every year. Ammonia attack on the outer surface, corrosion and erosion on the inner surface, crevice corrosion between the tube and the tube-sheet. Hz absorption and degradation of properties was not observed. Based on these results, 1,006 pieces of FS1O were installed in Buzen thermal power station, Unit I condenser in 1996. The tubing has been used in seawater without any corrosion problems.
Development of Sensing Device for Plant Conditions Utilizing Lazer Speckle Method
( Takashi Fukushima ),( Yohsuke Inagaki ),( Kiyoshi Nagasuga ),( Kunio Sato ),( Naoyuki Higashi ),( Tomoaki Sato ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Japanese smart-agriculture (new agriculture for labor-saving and high-quality products by utilizing advanced technology such as a robot technology and ICT) has been promoted by Ministry of Agriculture, Forestry and Fisheries. For Japanese smart-agriculture, several ambient conditions, such as temperature, humidity, soil moisture, CO<sub>2</sub> concentration, and others are available to optimize the cultivation. To get higher quality than ever, it’s needed to utilize the information of plant conditions such as photosynthetic ability, transpiration rate and respiration activity. However, there are no devices sensing them in the field and at a low price. We focus on laser speckle method (LS) which can detect microscopic motion of the target object. The interference pattern of the light which scattered and reflected on the surface or the inside, was created on the image sensor when coherent light such as a laser is irradiated the target object. This pattern is generally referred to as “Speckle”. It has been reported that the speckle pattern would be also depended on the structure of surface or inner parts of the target object. LS would be able to distinguish the movement reflected physiological phenomenon of plant by analyzing speckle images. In other words, it could obtain the information of plant conditions utilizing LS. The ultimate goal of this study is to develop a new and inexpensive device utilizing LS for sensing plant conditions. Some techniques for analyzing fluctuation of the speckle pattern have been proposed. Fujii method (FM) and Generalized difference method (GD) were used in this study. Both are analysis method for speckle images to quantify the luminance fluctuation of each pixel on consecutive images. The characteristics of the former are that analysis speed is relatively fast, and it could also enable to analyze in low brightness. The latter would clearly distinguish large fluctuation parts. In this experiment of adding the water stress to the plant samples, it was examined whether the water stress can be detected by using LS or not, and which analysis method is suitable to detect plant conditions. Speckle images were obtained from the main vein and the mesophyll cells of the sample soybean’s leaf, under two conditions; water stress and no treatment. Water stress was added to sample soybean by cutting leafstalk. The speckle images were taken at every hour from 7 am to 7 pm. As results, it was confirmed that it is capable to detect the water stress by analyzing speckle images. Comparing results of water stress and no treatment, increasing of water stress after cutting leafstalk was detected by both FM and GD, and GD was able to detect earlier and accurately than FM did. And it would be required to improve better measurement conditions and analysis method from now on.
Significantly high polarization degree of the very low-albedo asteroid (152679) 1998 KU<sub>2</sub>
Kuroda, Daisuke,Ishiguro, Masateru,Watanabe, Makoto,Hasegawa, Sunao,Sekiguchi, Tomohiko,Naito, Hiroyuki,Usui, Fumihiko,Imai, Masataka,Sato, Mitsuteru,Kuramoto, Kiyoshi EDP Sciences 2018 Astronomy and astrophysics Vol.611 No.-
<P>We present a unique and significant polarimetric result regarding the near-Earth asteroid (152679) 1998 KU2, which has a very low geometric albedo. From our observations, we find that the linear polarization degrees of 1998 KU2 are 44.6 ± 0.5% in the <I>R</I>C band and 44.0 ± 0.6% in the <I>V</I> band at a solar phase angle of 81.0°. These values are the highest of any known airless body in the solar system (i.e., high-polarization comets, asteroids, and planetary satellites) at similar phase angles. This polarimetric observation is not only the first for primitive asteroids at large phase angles, but also for low-albedo (<0.1) airless bodies. Based on spectroscopic similarities and polarimetric measurements of materials that have been sorted by size in previous studies, we conjecture that 1998 KU2 has a highly microporous regolith structure comprising nano-sized carbon grains on the surface.</P>