著者
深澤 瑞也 竜崎 崇和 亀井 大悟 川合 徹 川西 秀樹 菅野 義彦 篠田 俊雄 田倉 智之 土谷 健 友利 浩司 長谷川 毅 本間 崇 矢内 充 脇野 修 村上 淳 米川 元樹 中元 秀友
出版者
一般社団法人 日本透析医学会
雑誌
日本透析医学会雑誌 (ISSN:13403451)
巻号頁・発行日
vol.54, no.2, pp.57-60, 2021 (Released:2021-03-03)
参考文献数
3

透析患者の高齢化および長期間化によりシャント系アクセスの作製困難症例が増加しており,カテーテルでの透析を余儀なくされる患者も多い.一方,透析用カテーテル挿入手技は現在の診療報酬上,注射コードに分類されており保険点数はついているもののDPC施設ではその期間内,消耗品であるカテーテル代も含めて保険請求ができない.一方,中心静脈へのカテーテル挿入手技においては体表超音波装置やX線透視装置などの周辺機器の使用や,医師・看護師・技師も含めた人的な負担を要すること,また血管損傷などによる死亡例も含めた重篤な合併症を呈することもあり,改善が必要と考える.そこで保険委員会として今般,手技のタイムスタディーを含めた現状把握を行い,診療報酬改定への足掛かりとなるべく実態調査を行った.本結果を基に,外科系学会社会保険委員会連合を通して改定の要望を提出する方向である.
著者
鈴木 裕 深澤 瑞也 森 鷹浩 阪田 治 服部 遊 加藤 隆也
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.130, no.3, pp.401-406, 2010-03-01 (Released:2010-03-01)
参考文献数
20
被引用文献数
4 4

It is desired to detect stenosis at an early stage to use hemodailysis shunt for longer time. Stethoscope auscultation of vascular murmurs is useful noninvasive diagnostic approach, but an experienced expert operator is necessary. Some experts often say that the high-pitch murmurs exist if the shunt becomes stenosed, and some studies report that there are some features detected at high frequency by time-frequency analysis. However, some of the murmurs are difficult to detect, and the final judgment is difficult. This study proposes a new diagnosis support system to screen stenosis by using vascular murmurs. The system is performed using artificial neural networks (ANN) with the analyzed frequency data by maximum entropy method (MEM). The author recorded vascular murmurs both before percutaneous transluminal angioplasty (PTA) and after. Examining the MEM spectral characteristics of the high-pitch stenosis murmurs, three features could be classified, which covered 85 percent of stenosis vascular murmurs. The features were learnt by the ANN, and judged. As a result, a percentage of judging the classified stenosis murmurs was 100%, and that of normal was 86%.
著者
脇 隼人 鈴木 裕 阪田 治 深澤 瑞也 加藤 初弘
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.132, no.10, pp.1589-1594, 2012-10-01 (Released:2012-10-01)
参考文献数
23
被引用文献数
1 2

The number of dialysis patients is approximately 300,000 and is increasing every year in Japan. A renal failure patient requires a hemodialysis shunt for dialysis to be performed; however, the blood vessels around the hemodialysis shunt may become stenosed. The stethoscope auscultation of vascular murmurs has some use in the assessment of access patency; however, this diagnostic approach is skill dependent. Therefore, a diagnostic support system to detect stenosis is desirable. We developed an auscultating diagnosis support system for assessing hemodialysis shunt stenosis by using a self-organizing map (SOM) and short-time maximum entropy method. In this paper, for the purpose of improving the accuracy of stenosis detection, the Mel-frequency cepstrum coefficient (MFCC)-based hidden Markov model (HMM) was also used. As a result, a high correlation between an SOM system and HMM system was found. Therefore, the credibility of the each system was confirmed. Furthermore, the results indicated that the accuracy of stenosis detection could be improved by combining the SOM and HMM methods.