Abstract

With advent of the capsule endoscope, tattooing to mark the position of the intestinal polyps becomes critical technique for successful removal of polyps. Therefore, we develop a micro tattooing mechanism activated by multiple conical springs which can be installed in a capsule endoscope. In order to insert the needle and inject ink, a conical spring is released by cutting a post with Ni-Cr wire. Then, the needle is withdrawn by another conical spring activated by SMA wire. As a result, we could inject and withdraw the needle with electrical power consumption of 36.52 mWh.

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