The Development of Totally Implantable Artificial Heart System

本研究的目的是为人工心脏植入整个系统进行基础性研究，该系统包括血泵、驱动单元、控制系统、测量系统和能源。经过两年的研究，获得了以下产量：1.驱动单元研制了一种采用无刷直流脉冲电机的驱动单元。电机的自转由滚珠丝杠转化为直线运动。对超声波马达也进行了测试。作为一种新型驱动机构，设计了一种液气驱动装置。血泵一种新型机构的机械驱动血泵。该泵有一个自由隔膜，它还具有进水阀功能，不需要顺应室。研制了一种新型的、性能与Bjork-Schiey瓣相当的节段型聚氨酯铸造AH人工瓣膜(水母瓣)。将一系列非晶硅太阳能电池安装在白色长袍上，作为可穿戴太阳能电池的能源及其传输系统，开发了一种可穿戴式太阳能电池。可产生7.6瓦的电能。研制了具有78%传输效率的经皮能量传输系统。控制方法：研制了一套运动时自动控制系统。测量加速度以估计运动强度，并控制Ah值输出，并将输出曲线存储在计算机中。该系统在体内实验中运行良好。讨论了新技术、新概念、微机械技术对氢能领域的诱导以及利用该技术提出的氢能的新概念。

The objective of this sudy is to perform the basic study for implantation of the whole system of artiticial heart(AH) which includes a blood pump, driving unit, control system, measurement system and energy source. The followeng outputs were obtained as the result of 2 years research.1. Driving unit A driving unit used brushless DC pulse motor was developed. The revolution of the motor was converted to linear motion by a ball screw. An ultrasonic motor was also examined. As a new driving mechanism, a driving unit utilizing liquid gas was designed.2. Blood pump A mechanically driven blood pump with new mechanism was developed. The pump has a free diaphragm which has also inflow valve function and need not a compliance chamber. A new artificial valve(jellyfish valve) for AH casted by segmented polyurethane was developed, which had as good as performance with Bjork-Schiley valve.3. Energy source and its transmission system As an energy source for Ah, a wearable solar battery in which a series of amorphous silicon solar batteries are mounted on a white robe, was developed. 7.6 watts of electric energy could be generated. Transcutaneous energy transmission system with 78 % of transmission efficiency was also developed.4. Control metod An automatic control system of Ah during exercise was developed. The acceleration was measured to estimate the strength of exercise, and the Ah output was controlled along with an output curve memorized in a computer. The system worked well in in-vivo experiment.5. New technology and concept The inducement of micromachine technique to Ah field and the new concept of Ah utilizing this techique was discussed.