Title :
Development of an Artificial Myocardium using a Covalent Shape-memory Alloy Fiber and its Cardiovascular Diagnostic Response
Author :
Shiraishi, Y. ; Yambe, T. ; Sekine, K. ; Masumoto, N. ; Nagatoshi, J. ; Itoh, S. ; Saijo, Y. ; Wang, Q. ; Liu, H. ; Nitta, S. ; Konno, S. ; Ogawa, D. ; Olegario, P. ; Yoshizawa, M. ; Tanaka, A. ; Sato, F. ; Park, Y. ; Uematsu, M. ; Higa, M. ; Hori, Y. ; F
Author_Institution :
Inst. of Dev., Aging & Cancer, Tohoku Univ., Sendai
fDate :
6/27/1905 12:00:00 AM
Abstract :
The authors have been developing a newly-designed totally-implantable artificial myocardium using a covalent shape-memory alloy fibre (Biometalreg, Toki Corporation), which is attached onto the ventricular wall and is also capable of supporting the natural ventricular contraction. This mechanical system consists of a contraction assistive device, which is made of Ti-Ni alloy. And the phenomenon of the martensitic transformation of the alloy was employed to achieve the physiologic motion of the device. The diameter of the alloy wire could be selected from 45 to 250 mum. In this study, the basic characteristics of the fiber of 150 mum was examined to design the sophisticated mechano-electric myocardium. The stress generated by the fiber was 400 gf under the pulsatile driving condition (0.4W, 1 Hz). Therefore it was indicated that the effective assistance might be achieved by using the Biometal shape-memory alloy fiber
Keywords :
biomedical materials; martensitic transformations; nickel alloys; prosthetics; pulsatile flow; shape memory effects; titanium alloys; 0.4 W; 1 Hz; 45 to 250 mum; Biometal; TiNi; cardiovascular diagnostic response; contraction assistive device; covalent shape-memory alloy fiber; martensitic transformation; mechanoelectric myocardium; natural ventricular contraction; pulsatile driving condition; totally-implantable artificial myocardium; ventricular wall; Biomedical engineering; Biomedical imaging; Cardiology; Heart; Mechanical systems; Medical treatment; Myocardium; Optical fiber devices; Shape memory alloys; Thermal force;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1616431
