To study the effects of diferent bladder volumeson the length of prostatic measured by transabdominal ultrasonography. We did an observational study on 48 patients with BPH and urinary retention in Urologi clinic of Cipto Mangunkusumo Hospital Jakarta 1 March 2006 to 28 February 200.The blader of each was filled with 50 ml normal saline and increased stepwise by 50 ml each time until either an…