Efficacy of Buffered Lidocaine in Patients With Facial Swelling

Patients will rate pain on a Heft-Parker visual analog scale during needle insertion, placement, and solution deposition phases of the anesthetic injection(s). Patients will also rate pain during the incision and dissection phases of the incision and drainage procedure. The number of millimeters along the scale are reported. No pain corresponded to 0 mm. Mild pain was defined as greater than 0 mm and less than or equal to 54 mm. Mild pain included the descriptors of "faint", "weak", and "mild pain". Moderate pain was defined as greater than 54 mm and less than 114 mm and included the descriptor "moderate". Severe pain was defined as equal to or greater than 114 mm up to and including 170 mm. Severe pain included the descriptors of "strong", "intense", and "maximum possible."

Patients will rate their level of satisfaction with the incision and drainage procedure using a visual analog scale. The scale ranges from "not satisfied," to "somewhat satisfied," to "moderately satisfied," to "completely satisfied." Not satisfied corresponded to 0 mm. Somewhat satisfied was defined as greater than 0 mm and less than or equal to 33 mm. Moderately satisfied was defined as greater than 33 mm and less than 66 mm. Completely satisfied was defined as equal to or greater than 66 mm. Measurements along the scale were collected and analyzed by randomization test.