In Vitro and In Vivo Evaluation of Rechargeable Internal Backup Battery for a Totally Implantable Artificial Heart

• Published in: Jinko Zoki Vol. 28; no. 2; pp. 362 - 368
• Main Authors: Honda, H, Shiba, K, Koshiji, K, Murai, T, Masuzawa, T, Tatsumi, E, Taenaka, Y, Takano, H
• Format: Journal Article
• Language: Japanese
• Published: JAPANESE SOCIETY FOR ARTIFICIAL ORGANS 1999
• Subjects: energy; in vivo evaluation; lithium ion battery; quality of life; totally implantable artificial heart
• ISSN: 0300-0818; 1883-6097
• DOI: 10.11392/jsao1972.28.362

An experimental Lithium ion rechargeable internal backup battery for a totally implantable artificial heart was implanted under a goat's skin, and its in vivo characteristics of charge, discharge, and temperature were evaluated, and compared with their in vitro characteristics. The results showed little difference in the electrical characteristics between the in vivo and in vitro experiments. Although the temperatures of the battery case surface in in vitro experiment rose to 43.1°C in the charge process and 42.7°C in the discharge process, those in in vivo experiment were confined to within 39.8°C and 39.5°C, respectively. It was found that this temperature suppression was caused by the cooling effect of the blood flow. It is concluded that the experimental Lithium ion rechargeable backup battery for a totally implantable artificial heart is capable of implantable performance as an internal backup battery.