Review

Suprapubic compared with transurethral bladder catheterization for gynecologic surgery: a systematic review and meta-analysis.

Obstet Gynecol. 2012 Sep 1;120(3):678-87.
Randomized Controlled Trial

Comparison of efficacy of oxybutynin and tolterodine for prevention of catheter related bladder discomfort: a prospective, randomized, placebo-controlled, double-blind study.

Br J Anaesth. 2006 Mar 1;96(3):377-80.
Randomized Controlled Trial

Dorsal penile nerve block with ropivacaine versus intravenous tramadol for the prevention of catheter-related bladder discomfort: study protocol for a randomized controlled trial.

Trials. 2015 Dec 30; 16: 596.