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

Figure 12

Influence of lubrication of needles with Ø 0.6 mm cannulas, made with silicone oil, in the force of penetration in artificial fabric, sanded in the longitudinal direction of the insertion, with sandpapers (a) P180 and (b) P120.

(a)

(b)