What is a duodenal stent?

A duodenal stent is a small, expandable tube that is placed in the duodenum to keep it open when it has become narrowed or blocked. The duodenum is the first section of the small intestine that connects to the stomach. 

Some key points about duodenal stents:

- Location - The stent is positioned at the very top part of the small intestine, where the duodenum meets the pyloric valve of the stomach. This allows food/fluids to pass from the stomach into the intestine.

- Uses - Duodenal stents are commonly used to provide relief from obstructions caused by pancreatitis, cancer growth, scarring from ulcers, or compression from surrounding structures.

- Benefits - A duodenal stent can help improve symptoms of nausea, vomiting, and abdominal pain by keeping this portion of the intestine open. It can serve as a temporary solution before surgery.

- Insertion - Duodenal stents are placed endoscopically, guided by fluoroscopy. They are compressed into a small diameter for insertion and then expand to widen the lumen once positioned in the duodenum.

- Material - Most duodenal stents are made from flexible metal mesh or plastic. The stent conforms to the inner duodenal anatomy.

- Duration - These stents may be left in place permanently or removed after several weeks/months once the obstruction has resolved. 

Overall, duodenal stents offer a minimally invasive way to provide palliative treatment for duodenal strictures and obstructions in patients who are not candidates for or wish to avoid surgery.