Design of Plate-type Actuator using SMA Wire for Assistant Artificial Heart Muscle

Abstract

A compact thin plate-type actuator using Ti—Ni—Cu shape memory alloy (SMA) wire is proposed and designed for its optimized motion to be applied as an assistant artificial heart muscle. The artificial heart muscle will assist by pushing weakened cardiac muscle that has been damaged by myocardial infarction and has lost its ability to contract. The actuator consists of a SMA wire, 250 μm in diameter, and a leaf spring that acts as a bias spring and cooling plate. The SMA wire is fixed at the end of the leaf spring to transform contraction motion into bending of the actuator. The shape of the actuator is controlled by on/off control of electric current applied via the SMA wire. Repeatable bending and releasing will be utilized for the heart assist application. This repeatable actuator motion will be able to assist up to 120 bpm (heartbeats per minute).

Keywords

actuator assistant artificial heart muscle medical application shape memory alloy.

Get full access to this article

View all access options for this article.

References

Arabia, F.A. , Copeland, J.G. , Smith, R.G. , Banchy, M. Foy, B. , Kormos, R. , Tector, A. , Long, J. , Dembisky, W. , Carrier, M. , Keon, W. , Pavie, A. and Duveau, D. 1999. ``Cardio West Total Artificial Heart: A Retrospective Controlled Study,'' Journal of Artificial Organs, 23:204—207.

Cooley, D.A. , Liotta, D. , Hallman, G.L. , Bloodwell, R.D. , Leachman, R.D. and Milam, J.D. 1969. ``Orthotopic Cardiac Prosthesis for Two-Staged Cardiac Replacement,'' American Journal of Cardiology, 24:723—730.

Dono, S. , Saito, A. and Kuwata, T. 2003. ``Knit Structure SMA Actuator for Wearable Artificial Muscle System,'' Matsushita Denko Tech Rep, 59—63, in Japanese.

Dowling, R.D. , Etoch, S.W. , Stevens, K.A. , Johnson, A.C. and Gray, L.A. 2001. ``Current Status of the AbioCor Implantable Replacement Heart,'' Journal Annals of Thoracic Surgery, 71: S147—S149.

Funakubo, H. 1987. Shape Memory Alloys, Gordon and Breach, Science Publ. New York.

Ibuki, R. , Maruyama, S. , Sakai, S. , Yambe, T. and Behnia, M. 2004. ``Development of Totally Implant Artificial Heart Muscle Using Thermoelectric Actuator,'' Thermal Science and Engineering , 12(3):27—34 (In Japanese).

Ibuki, R. , Maruyama, S. and Komiya, A. 2005. ``Development of a Simple Structured Artificial Muscle Using SMA Wire,'' In: AIP Conference Proceedings of the Second International Conference on Flow Dynamics, pp. 450—455, Sendai, Japan.

Maruyama, S. , Ibuki, R. , Sakai, S. , Yamada, M. , Sato, M. , Yanbe, T. , Takagi, T. , Luo, Y. and Behnia, M. 2001. ``Development of a Novel Artificial Heart Muscle Using Thermoelectric Actuators,'' International Journal of Heat and Technology, 19(2):75—80.

Nitta, S. , Takahashi, A. , Katahira, Y. , Tanaka, M. , Okamoto, T. , Kagawa, Y. , Hongo, T. , Watanabe, T. , Horiuchi, T. , Tanghi, Y. , Yamauchi, K. and Yabuki, T. 1983. MBE, 83(49): 45—51 (In Japanese).

10.

Sawyer, P.N. , Page, M. , Rudewald, B. , Lagergren, H. , Baselius, L. , McCool, C. , Halperin, W. and Srinivasan, S. 1971. Trnas. Amer. Soc. Artif. Int. Organs, 17: 470—473.

11.

Westaby, S. , Katsumata, T. , Houel, R. , Evans, R. , Pigott, D. , Frazier, O.H. and Jarvik, R. 1998. ``Jarvik 2000 Heart Potential for Bridge to Myocyte Recovery ,'' Circulation, 98: 1568—1574.