Interactive virtual inspection of modeled objects is provided. The devices can be used in vascular channels, urinary tracts, biliary ducts and the like, and filter emboli and other debris generated at a treatment site. The invention provides a composition that is ductile or flexible at the elevated temperatures experienced during a fire and retains integrity so as to stay in place throughout the fire enabling it to continue to function as a thermal barrier. The device punctures the apex of the heart and travels through the ventricle. For this purpose, a channel opening will be opened by displacement of a control element arranged in the connection channel.