The 3-stage dilation balloon catheter consists of a balloon, an expansion tube, a catheter seat, and a guide wire. It is mainly used for adults and adolescents to perform endoscopic dilation of digestive tract stenosis. Balloon catheter is a kind of interventional medical device, which is disposable. It simply expands the blood vessels at the blocked part to make its smaller inner diameter return to the normal inner diameter of blood vessels or a little smaller than normal, but it will be better than before the operation. So what's the difference between a 3-stage dilation balloon catheter and a catheter? Here's a detailed introduction!