Abstract
Laser-assisted drug delivery (LAD) has the potential for facilitating topical anesthesia with reduced onset time. In this randomized, double-blind, crossover study we compared the efficacy and adverse event profile of LAD for topical anesthesia before venipuncture using two output energies (2.0 and 3.5 J/cm2). Mean Visual Analog Scale pain scores were not statistically different (P = 0.57) between the low-energy (mean = 6.7) and high-energy (mean = 8.1) lasers. LAD at an energy of 2.0 J/cm2 (570 mJ) is as effective, with similar adverse events, as an energy of 3.5 J/cm2 (1000 mJ) in facilitating topical anesthesia.
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