Forty million men in the US and over 500 million worldwide suffer from urinary obstruction related to benign prostatic hyperplasia (BPH). Millions of patients do not see effective relief from drugs, yet decline to undergo an invasive surgical procedure with high risk of side effects such as sexual dysfunction. To meet this clinical need, Zenflow has developed the Spring System. The device is designed to be deployed in the urologist's office in a simple, atraumatic procedure. Ongoing clinical trials have shown positive results out to four years after treatment.