Randomized Controlled Trial

Lack of effect of intrarectal lidocaine for pain control during transrectal prostate biopsy: a randomized prospective study.

Eur. Urol. 2002 Sep 1; 42 (3): 217-20.
Clinical Trial

Transrectal periprostatic lidocaine injection anesthesia for transrectal prostate biopsy: a prospective study.

Prostate Cancer Prostatic Dis. 2003 Jan 1; 6 (4): 311-4.
Randomized Controlled Trial

Nitrous oxide vs periprostatic nerve block with 1% lidocaine during transrectal ultrasound guided biopsy of the prostate: a prospective, randomized, controlled trial.

J. Urol. 2003 Nov 1;170(5):1881-3; discussion 1883.