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Pancreatic metallic stents that expand by themselves after deployment, applying a constant radial pressure to the pancreatic duct walls. These devices consist either of compressed metallic stents that open by themselves as soon as they are released or of shape-memory stents manufactured from an alloy combining nickel and titanium (i.e., nitinol) that expands in response to body temperature. Some stents include radiopaque markers for accurate stent positioning. Self-expandable pancreatic stents are typically deployed using endoscopic procedures; they are mostly used to treat stenosis of the main pancreatic duct caused by malignant tumors.
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