This is called an anastomotic stenosis. It’s also known as a stricture. It's not clear why stenosis occurs after gastric bypass surgery. But it is most likely to occur 3 to 4 weeks after the surgery.

The Optilume benign prostatic hyperplasia (BPH) catheter system is a novel minimally invasive paclitaxel-coated dilation system that has demonstrated substantial and durable results in urinary flow ...