A stent is a small flexible tube, usually made of plastic and biocompatible material, and used to repair ducts in the body. It is usually introduced into the body through a small incision and is used to treat the ducts that have been narrowed or blocked by diseases: the oesophagus, bile ducts, trachea, or bronchi. In addition, it is used in the treatment of aortic aneurysms. In this case, the stent is inserted through a small incision in the groin and advanced through the femoral artery to the aorta and the aneurysm area to strengthen the vessel wall. Placed in the oesophagus, the stent is used to allow passage of food; In the bile ducts is used to open the passage of bile into the intestine; and when placed in the trachea and bronchi it allows normal breathing. This method of stent surgery is minimally invasive.
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