Combination of lidocaine suppository and periprostatic nerve block during transrectal prostate biopsy: a prospective randomized trial.

Abstract

To assess the most effective local analgesia during transrectal ultrasound-guided prostate biopsy. A total of 123 consecutive patients undergoing transrectal ultrasound-guided prostate biopsy for elevated prostate-specific antigen levels and/or a suspicious digital rectal examination were randomized to three groups. Patients received a 60-mg lidocaine suppository (group 1, n = 41), a periprostatic nerve block (10-mL injection of lidocaine hydrochloride; group 2, n = 41) or a combination of both (group 3, n = 41) before a 10-core transrectal ultrasound-guided biopsy. A total of 80.5% (n = 99) of the patients underwent their first biopsy, 27.1% (n = 22) their second and 2.4% (n = 2) the third. Pain was evaluated on a 10-point visual analog scale for each step of the procedure. Prostate-specific antigen values ranged from 0.39 to 90.1 (mean [SD] 8.76 ng/mL [11.08 ng/mL]). Comparison of the median visual analog scale scores between groups 1 and 2 showed a significant difference (P = 0.004). The differences in the outcomes between groups 1 and 3 (P = 0.001), and groups 2 and 3 (P = 0.001) were also significant. Patients of group 3 had the best output corresponding to the pain sensations and therefore the lowest visual analog scale scores. The combination of lidocaine suppository and periprostatic lidocaine infiltration is more effective for pain control than either lidocaine suppository or periprostatic lidocaine infiltration alone in patients undergoing transrectal ultrasound-guided prostate biopsy.