Devices, systems, and methods for pyloric obstruction and/or duodenal exclusion

An implantable device has an expandable element (e.g., a balloon) that can apply a radially outward anti-migration force to hold the implantable device in place. The implantable device occlusion device may be an occlusion device configured to be inserted through a body passage. The implantable device may include a first component and a second component that is expandable within a lumen of the first component to apply an anti-migration force to the first component. The first component may be an expandable stent coated to resist tissue ingrowth, and the second component may be an expandable balloon configured to apply an anti-migration force to the expandable stent. 一种可植入装置具有可扩张元件(例如球囊)，其可施加径向向外的防迁移力以将可植入装置保持到位。可植入装置阻塞装置可以是构造为通过身体通道而插入的阻塞装置。可植入装置可以包括第一部件和第二部件，第二部件可在第一部件的腔内扩张以对第一部件施加防迁移力。第一部件可以是被涂覆以抵抗组织向内生长的可扩张支架，第二部件可以是构造为对可扩张支架施加防迁移力的可扩张球囊。