DocumentCode :
3303929
Title :
An automatic monitoring system for artificial hearts using self-organizing map
Author :
Wang, Xian-Zheng ; Yoshizawa, Makoto ; Tanaka, Akira ; Abe, Ken-ichi ; Takeda, Hiroshi ; Yambe, Tomoyuki ; Nitta, Shin-ichi ; Imachi, Kou
Author_Institution :
Graduate Sch. of Eng., Tohoku Gakuin Univ., Sendai, Japan
Volume :
2
fYear :
1999
fDate :
36434
Abstract :
The overall goal of the authors´ research is an automatic, real-time and on-line monitoring system of artificial hearts. In this task, it is very important to automatically detect and classify abnormalities of the artificial heart control system and the recipient´s circulatory system. The self-organizing map was applied to the pattern recognition of aortic pressure (AOP) which is considered to mostly represent the state of the circulatory system. The AOP signal data were fed to a Self-Organizing Map (SOM) beat by beat. During the unsupervised learning process the SOM units organize in such a way that similar AOP beat patterns were represented in particular areas of the SOM. The map location areas of the AOP signals in the different states of the circulatory system were also different. The results of visual examination revealed that the states of circulatory system were distinguished well by the map. It is expected that a map can be trained off-line with a large database and then used for on-line monitoring and analysis for artificial hearts
Keywords :
artificial organs; blood pressure measurement; cardiology; computerised monitoring; patient monitoring; self-organising feature maps; unsupervised learning; adult goat; aortic pressure; aortic pressure pattern recognition; artificial hearts; automatic real-time on-line monitoring system; circulatory system state; pneumatically-driven sac-type blood pumps; recipient´s circulatory system; self-organizing map; total artificial heart; Aging; Artificial heart; Circulatory system; Computerized monitoring; Organizing; Pattern recognition; Real time systems; Trajectory; Unsupervised learning; Visual databases;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
ISSN :
1094-687X
Print_ISBN :
0-7803-5674-8
Type :
conf
DOI :
10.1109/IEMBS.1999.803911
Filename :
803911
Link To Document :
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