Application of the latissmus dorsi musles as a energy source for circulatory assist device

Abstract

The purpose of this study is to assess the feasibility of the latissmus dorsi muscle (LDM) as energy source for circulatory assist device. We developed a pneumatic chamber (PC). The PC inserted beneath the LDM was compressed by the burst-stimulated LDM and thereby generated pneumatic pressure to drive a ventricular assist device (VAD). The chamber was best funtioned when it was placed proximally (III intercostal space) than placed in middle or distal position. The insertion type skeletal muscle pump of LDM as a energy source generated acceptable hemodynamic work in pulmonary circulation. Though it is difficult to use as a energy source of left ventricular assist device, we could apply it in a fashion of the energy source of counterpulsation with hign preload.