A study on mechanical strength of pyramid-shaped microneedle

This paper introduces a novel design of hollow microneedle for efficient blood extraction. With special features such as square base and pyramid tip, our proposed microneedle may have better mechanical strength compared with that of previously proposed microneedles. We also provide mathematical frameworks for analyzing both mechanical strength and fluidic transport efficiency of microneedles. To evaluate the performance of our microneedle compared with that of previously proposed microneedles we conduct intensive calculations with various parameter settings. According to calculation results, our proposed microneedle may be optimal for blood collection. Moreover, our proposed microneedle provides continuous blood collection with higher volumes because of its optimal hollow width with recommended applied pressure.