Variation of the Penetration Effort in an Artificial Tissue by Hypodermic Needles

Figure 10

Graphs on the influence of the variation of the bevel angles (15^°, 30^°, 45^°, 60^°, 75^°, and 90^°), keeping the diameters of the cannulas fixed. (a) Graphic 1—cannula with φ 0.60 mm. (b) Graphic 2—cannula with φ 0.80 mm. (c) Graphic 3—cannula with φ 1.00 mm. (d) Graphic 4—cannula with φ 1.20 mm. (e) Graphic 5—cannula with φ 1.40 mm.

(a)

(b)

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(e)