This is another video that I made of an earlier prototype of the liver retractor. It does not include the write portion of the retractor which allows the fingers to be manipulated much more nimbly due to the reduced friction in the line back to the motor box. The steel wire that is controlling the movement of the retractor is wound around motors that are housed in the aluminum box in the background of the video. I used a braided metal hose from home depot to prevent kinking in the line guiding the pull wires back to the box.
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