自己組織化マップを用いた透析シャント音による狭窄診断支援装置 [in Japanese] An Auscultaiting Diagnosis Support System for Assessing Hemodialysis Shunt Stenosis by Using Self-organizing Map [in Japanese]
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- 鈴木 裕 SUZUKI Yutaka
- 山梨大学 総合分析実験センター University of Yamanashi
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- 深澤 瑞也 FUKASAWA Mizuya
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
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- 阪田 治 [他] SAKATA Osamu
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
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- 加藤 初弘 KATO Hatsuhiro
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
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- 服部 遊 HATTORI Asobu
- 東京都立産業技術研究センター Tokyo Metropolitan Industrial Technology Research Institute
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- 加藤 隆也 KATO Takaya
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
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Author(s)
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- 鈴木 裕 SUZUKI Yutaka
- 山梨大学 総合分析実験センター University of Yamanashi
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- 深澤 瑞也 FUKASAWA Mizuya
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
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- 阪田 治 [他] SAKATA Osamu
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
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- 加藤 初弘 KATO Hatsuhiro
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
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- 服部 遊 HATTORI Asobu
- 東京都立産業技術研究センター Tokyo Metropolitan Industrial Technology Research Institute
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- 加藤 隆也 KATO Takaya
- 山梨大学 大学院 医学工学総合研究部 University of Yamanashi
Abstract
Vascular access for hemodialysis is a lifeline for over 280,000 chronic renal failure patients in Japan. Early detection of stenosis may facilitate long-term use of hemodialysis shunts. Stethoscope auscultation of vascular murmurs has some utility in the assessment of access patency; however, the sensitivity of this diagnostic approach is skill dependent. This study proposes a novel diagnosis support system to detect stenosis by using vascular murmurs. The system is based on a self-organizing map (SOM) and short-time maximum entropy method (STMEM) for data analysis. SOM is an artificial neural network, which is trained using unsupervised learning to produce a feature map that is useful for visualizing the analogous relationship between input data. The author recorded vascular murmurs before and after percutaneous transluminal angioplasty (PTA). The SOM-based classification was consistent with to the classification based on MEM spectral and spectrogram characteristics. The ratio of pre-PTA murmurs in the stenosis category was much higher than the post-PTA murmurs. The results suggest that the proposed method may be an effective tool in the determination of shunt stenosis.
Journal
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- IEEJ Transactions on Electronics, Information and Systems
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IEEJ Transactions on Electronics, Information and Systems 131(1), 160-166, 2011-01-01
The Institute of Electrical Engineers of Japan
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