Palliative stent and insertion device therefor

摘要: The stent, which is self-expanding, in the form of a tube can be compressed for insertion into human or animal body to relieve blocking oesophagus other hollow viscera by tumours disorders. It formed as single double conical helix straight with cut slots allowing expand different diameters along its length, so holding itself place. A knitted used hold stent shape insertion. ratchet system may provided on one both surfaces collapsed that once extended it will not collapse again.