Periprostatic administration of local anesthesia during transrectal ultrasound-guided biopsy of the prostate: a randomized, double-blind, placebo-controlled study.

OBJECTIVES

To evaluate the effect of periprostatic infiltration with local anesthesia on the level of discomfort associated with transrectal ultrasound-guided needle biopsy of the prostate. Transrectal ultrasound-guided needle biopsy of the prostate is the standard procedure to diagnose prostate cancer.

METHODS

A prospective, randomized, double-blind study was performed on 100 men referred for biopsy of the prostate. Fifty subjects were randomized to periprostatic injection of 10 mL of 2% lidocaine solution without epinephrine, and 50 were randomized to injection of placebo (10 mL of 0.9% NaCl). Each subject completed three 10-point visual analog scales for pain after a series of 15 needle biopsies. Pain was rated during the biopsy, diagnostic investigation, and injection of lidocaine.

RESULTS

Patients who received local anesthesia had significantly lower visual analog scale scores compared with the group without lidocaine during the biopsy (mean score 0.76 versus 3.62, P <0.001) and diagnostic examination (mean score 1.08 versus 1.86, P = 0.025). Lidocaine injection caused no adverse effects.

CONCLUSIONS

Periprostatic injection of lidocaine represents a simple and safe procedure that significantly reduces discomfort during probe manipulation and biopsy. We recommend this procedure in men undergoing transrectal ultrasound-guided prostate biopsy.