Abstract
Explicit finite element analysis (FEM) is applied to the analysis, in which microneedles imitating mosquito's proboscis are inserted to a viscoelastic material imitating human skin. The needles are central straight one imitating labrum, and side two needles imitating maxillas. The results obtained by simulation are as follows: 1) jagged shape of side needle is effective for reducing resistance force in forward motion due to decrease of contact area between needle and skin organism, 2) it has anchoring effect in backward motion, which eases the forward motion of central straight needle, 3) cooperative motion of these three needles makes the insertion force lower, which may be useful for low-invasive insertion of medical needle in future. A microneedle of bundling three needles is fabricated by MEMS technique, which imitates the shape and size of real mosquito. Using this bundled needle, the above-mentioned effect of cooperative three needles motion having phase to each other is experimentally confirmed.
