Benign prostatic hyperplasia (BPH) is a benign enlargement of the prostate gland that obstructs the flow of urine from the bladder. This condition can significantly affect quality of life, causing difficulty initiating urination, increased urinary frequency, the need to get up to urinate at night, and a feeling of incomplete bladder emptying.

The Rezum system uses the thermal energy of water vapor to treat the prostate tissue causing the obstruction. When the vapor transforms into liquid, it releases energy that produces selective cell death in the prostate tissue, which is then gradually reabsorbed, allowing normal urine flow to be restored.

The device is inserted through the urethra, and water vapor is applied to pre-planned areas of the prostate on an individual basis. As it is an endoscopic technique, it is a minimally invasive procedure with few side effects, which are generally mild and transient. Furthermore, it is performed on an outpatient basis under local or regional anesthesia, or sedation.

The Rezum system is indicated for men with benign prostatic hyperplasia , mild to moderate urinary symptoms, and prostates up to 80 cc . It can also be an alternative for patients who wish to avoid prolonged drug treatment or who experience side effects or interactions with their usual medication.