1 Patented technology.
2 Intra company data show less puncture resistance for the asymmetric edge compared to a standard 3-bevel. Lower puncture resistance is related to lower pain (T. Asakura, 2013, Jpn J Med Pharm Sci 69(1):147-155).
3 The size of the perforation scar correlates with the outer diameter of the needle (T. Asakura, H. Seino, 2004, Jpn J Pharm. Health Care Sci., 30(6):368-376).