Left Heart Bypass Using the Oscillated Blood Flow with Totally Implantable Vibrating Flow Pump

• Published in: Artificial organs Vol. 22; no. 5; pp. 426 - 429
• Main Authors: Yambe, Tomoyuki, Owada, Naoki, Kobayashi, Shin-ichi, Sonobe, Taro, Naganuma, Shigeru, Nanka, Shunsuke, Hashimoto, Hiroyuki, Yoshizawa, Makoto, Tabayashi, Kou-ichi, Takayasu, Hideki, Takeda, Hiroshi, Nitta, Shin-ichi
• Format: Journal Article
• Language: English
• Published: Boston, USA Blackwell Science Inc 01-05-1998
• Subjects: Animals; Apex approach; Blood Pressure - physiology; Coronary Circulation - physiology; Equipment Design - standards; Goats; Heart Bypass, Left; Heart-Assist Devices; Oscillometry; Prostheses and Implants; Totally implantable; Ventricular assist system; Vibrating flow pump; Vibration
• ISSN: 0160-564X; 1525-1594
• DOI: 10.1046/j.1525-1594.1998.06148.x

Aiming at a totally implantable ventricular assist device (VAD), a vibrating flow pump (VFP) was developed in Tohoku University. A transcutaneous energy transmission system (TETS) using an amorphous fiber was developed for the totally implantable VAD system. The VFP works with a higher frequency than the natural heart of a biological system, a frequency of 10–50 Hz. In this research, animal experiments on left heart bypass were performed with healthy goats. Blood from the apex of the left ventricle was received and was sent to the aorta so that an adequate supporting effect of the left heart was provided. In particular, the depression effect of the left ventricle was obvious. As a result, sufficient artificial heart flow was provided. For a totally implantable type VAD, left heart bypass of almost 100% may become necessary in some situations. Therefore, apex approaches of left heart bypass may be desirable. From an anatomical consideration, an apex of the heart is suitable for the VFP of this totally implantable type. In the left heart bypass for which the apex of the heart was used, an almost 100% bypass was possible. This is a requirement that is important when waiting for recovery of sufficient cardiac function. It is also important that left heart circulation is maintained fully by an artificial heart of the complete implantation type. The VFP was considered to be useful as a totally implantable type artificial heart from the results.