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. Author manuscript; available in PMC: 2010 Apr 26.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2009;2009:262–265. doi: 10.1109/IEMBS.2009.5332872

Fig. 4.

Fig. 4

Scaled needles of Ø 1.5 cm used to understand the interaction between the needle tip and medium. Needles of various bevel angles (10°, 15°, 30°, 45°, and 60°) were used in the study.