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A randomized controlled comparison between periprostatic nerve block and pelvic plexus block at the base and apex of 14 core prostate biopsies

Abstract
Abstract Purpose To compare the pain control efficacies of the pelvic plexus block (PPB), periprostatic nerve block (PNB), and controls during a 14-core basal and apical core prostate biopsy. Methods This randomized controlled study, performed between January 2015 and January 2016, included patients with an abnormal serum prostate-specific antigen (PSA > 3?ng/mL) level or a palpable nodule on digital rectal examination. The enrolled patients were randomized into three groups: Group 1, intrarectal local anesthesia (IRLA, 10?mL of 2% lidocaine jelly) and PPB with 3.0?mL of 2% lidocaine injected at the bilateral pelvic plexus; Group 2, IRLA and PNB with 3.0?mL of 2% lidocaine injected at both periprostatic nerves; and Group 3, only IRLA. Patients answered the visual analog scale (VAS) questionnaire at 6 time points. Results This study consisted of 163 patients (Group 1 = 55, Group 2 = 55, and Group 3 = 53). Pain at the apical biopsy location was less in Groups 1 and 2 than in Group 3 (p < 0.001, p < 0.001) and between the two local anesthetic groups (PNB + IRLA vs PPB + IRLA). Group 2 patients reported less pain than Group 1 patients (p = 0.022). Pain during the basal core biopsy was significantly less in Groups 1 and 2 than in Group 3 (p = 0.002, p < 0.001), but there were no significant differences in pain control between the two methods (PNB + IRLA vs PPB + IRLA, p = 0.054) during basal core biopsy. Conclusions PNB + IRLA is an effective local anesthetic method for reducing pain when performing apical biopsies compared with PPB + IRLA or IRLA alone.

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