Japanese researchers at Kansai
University in Osaka have managed to create a less painful solution for blood
sampling than the presently used smooth needles. While designing the new
needles, scientists have tried to mimic the structure of a mosquito's proboscis.
They were successful in creating a
group of three silicon needles (1 straight needle and 2 outer jagged fabricated
needles) that are activated by piezo-ceramic actuators (PZT). The PZT is
responsible for the co-operative motion of the needles, which imitates a
mosquito's motion. This silicon needle is electrochemically etched, thus making
the 3D sharp tip with a finely smooth surface which aids easy insertion. The shank
is machined by a deep reactive ion etching (DRIE). Scientists confirmed the
effectiveness of these needles.
report is published in 'New Scientist'.