Stent-in-stent technique under fluoroscopy for removal of embedded esophageal stent: a retrospective case series.

Background: Treatment of complications after esophageal stent placement and methods for removal of stents need to be improved. The purpose of this study was to evaluate the safety and efficacy of stent-in-stent (SIS) removal of esophageal stent under fluoroscopy. Methods: This study analyzed the clinical data of consecutive patients undergoing esophageal stent removal by the SIS technique under fluoroscopy. The procedure was performed under local anesthesia on conscious sedated patients. Under fluoroscopy, a second esophageal stent was released within the lumen of the first esophageal stent. The second stent was larger than the first, with both ends protruding 1-2 cm beyond the ends of the first stent. Four weeks later, both esophageal stents were removed by the SIS technique under fluoroscopy. All procedures were performed by the same interventional radiologist (with >10 years of experience). Results: A total of 25 patients were treated by the SIS removal technique. In 23 patients, the first esophageal stent was easily removed by the SIS technique; in the other 2 patients, stent fracture occurred, and some residual nitinol wire had to be removed endoscopically. No serious complications occurred in any patient. Conclusions: The SIS removal technique appears to be a safe and effective method for removal of embedded esophageal metallic stents.