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Mesh tubes that spring open inside a gullet, bowel, bile duct or airway narrowed by cancer, to let food, stool, bile or air through again. Most are put in through an endoscope without an operation.
The FDA classes oesophageal (ESW), colonic (MQR) and duodenal (MUM) metal stents under 21 CFR 878.3610, biliary stents under 876.5010 (FGE) and expandable tracheal prostheses under 878.3720 (JCT, and NYT for polymeric). Current lines include Boston Scientific's WallFlex oesophageal (K261978, 10 July 2026), colonic and duodenal (K234046, 8 March 2024) and biliary RX stents (K240464, 30 August 2024), M.I.Tech's HANAROSTENT (K253327, 30 October 2025), Taewoong Medical's Niti-S oesophageal (K243619, 30 October 2025) and Niti-S duodenal and colonic Comfort stents (K250663, 31 March 2025), and Cook's Zilver 518 and 635 biliary stents (K182980, 16 November 2018). The glossary covers biliary stents and their problems, duodenal stenting and colorectal obstruction; the biliary stenting record covers the procedure.
A nitinol or stainless steel mesh, bare or covered with a membrane against tumour ingrowth, is constrained on a delivery system, positioned across the stricture under endoscopic or fluoroscopic guidance and released to expand radially.
Query for this technology: (TITLE:"Self-expanding metal stents for malignant obstruction" OR ABSTRACT:"Self-expanding metal stents for malignant obstruction" OR TITLE:"oesophagus, duodenum, colon, bile duct, airway" OR ABSTRACT:"oesophagus, duodenum, colon, bile duct, airway" OR TITLE:"SEMS" OR ABSTRACT:"SEMS" OR TITLE:"Self-expanding metal stent" OR ABSTRACT:"Self-expanding metal stent") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about Self-expanding metal stents for malignant obstruction (oesophagus, duodenum, colon, bile duct, airway), not a curated reading list.
Shares Single-operator cholangioscopy (SpyGlass DS), Oesophageal cancer and the tag devices-gaps-2026-11.
Shares Early integrated palliative care, Gastric & gastro-oesophageal junction cancer, Pancreatic ductal adenocarcinoma, Colorectal cancer and the tag devices-gaps-2026-11.
Shares Cook Medical, Colorectal cancer and the tag devices-gaps-2026-11.
Shares Boston Scientific, Colorectal cancer and the tag devices-gaps-2026-11.
Shares Gastric & gastro-oesophageal junction cancer, Pancreatic ductal adenocarcinoma, Colorectal cancer and the tag devices-gaps-2026-11.
Shares Early integrated palliative care, Non-small-cell lung cancer and the tag devices-gaps-2026-11.
Shares Early integrated palliative care and the tag devices-gaps-2026-11.
Shares Early integrated palliative care and the tag devices-gaps-2026-11.
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