After transurethral bladder resection, large-sized foley catheter have been used for drainage of urine and residual blood. Because of urinary catheterization, patients usually experiences catheter-related bladder discomfort defined as a burning sensation with an urge to void or discomfort in the supra-pubic region caused by catheter- related bladder irritation.~Dexmedetomidine is an alpha-2 antagonist and used as an analgesic agent. The investigators try to evaluate The efficacy of dexmedetomidine for the treatment of catheter-related bladder discomfort
To evaluate the efficacy of dexmedetomidine for the prevention of catheter-related bladder discomfort