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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: Clin J Pain. 2012 Feb;28(2):129–135. doi: 10.1097/AJP.0b013e318225dbe9

Figure 5.

Figure 5

Representative images of the forearm injection sites immediately after lidocaine administration and 1 h after injection. a) Microneedle: a distinct symmetric skin wheal and slight erythema are seen immediately after injection. There is no evidence of blood. One hour post injection, there is a faint wheal still present. b) Hypodermic needle: a distinct raised skin wheal with slight blanching of the skin and a drop of blood at the needle insertion point is seen immediately after injection.