Use of a nylon loop and transparent cap to assist in the endoscopic removal of a long and bent metal foreign body incarcerated in the duodenum

There are many endoscope-assisted techniques that have been reported for the removal of traditional foreign bodies in the digestive tract (e. g. rat-tooth grasper, mini-snare, and end loop, among others) [1] [2] [3]. However, for any long and bent metal foreign bodies incarcerated in the duodenum or stomach, the technical difficulty is how to make the angled and sharp ends pass through the physiological narrow areas (e. g. pyloric canal, cardia, and esophageal entrance) in a relatively safe way.