Suction stent
The present invention relates to a stent for introduction into a hollow organ, in particular the gastrointestinal tract, of a human or animal patient, which brings about vacuum sealing of leaks, such as anastomosis insufficiencies, in the hollow organ.
1. Stent for introduction into a hollow organ or gastrointestinal tract of the human or animal body, comprising:
a radially expandable tubular hollow body ( 1 ) open in the longitudinal direction,
a porous shapeable material ( 3 ) radially sheathing the hollow body ( 1 ) at least in certain regions, and
a drainage means ( 4 ) introduced into the material ( 3 ) and which is configured to apply a subnormal pressure, or a vacuum,
wherein the lumen of the hollow body ( 1 ) is air- and water-tight with respect to the porous shapeable material ( 3 ), the hollow body ( 1 ) being sealed from the porous shapeable material ( 3 ), at least in certain regions, by an air- and water-tight film ( 2 ).
2. Stent according to claim 1 , wherein the film ( 2 ) is tubular.
3. Stent according to claim 1 , wherein the film ( 2 ) projects beyond the hollow body ( 1 ) at least at one end.
4. Stent according to claim 3 , wherein the film projects beyond the stent at both ends and the diameter of the film ( 2 ) increases in the regions projecting beyond the hollow body ( 1 ).
5. Stent according to claim 1 , wherein the drainage means ( 4 ) is introduced into the material ( 3 ) via a point of passage (P) in the film ( 2 ).
6. Stent according to claim 5 , wherein, at the point of passage (P), the film ( 2 ) is sealed from the drainage means ( 4 ) by an easily deformable, non-flowing sealant (S).
7. Stent according to claim 6 , wherein the sealant (S) comprises a material selected from the group consisting of a silicone, a hydrocolloid, a lyogel, and a hydrogel.
8. Stent according to claim 1 , wherein the diameter of the hollow body ( 1 ) increases in one or both end region(s).
9. Stent according to claim 8 , wherein the thickness (T) of the material ( 3 ) decreases in the end region(s) of the hollow body.
10. Stent according to claim 9 , wherein the thickness (T) of the material ( 3 ) decreases to the same extent as the diameter of the hollow body ( 1 ) increases in the end region(s).
11. Stent according to claim 1 , wherein the material ( 3 ) is a plastics material foam.
12. Stent according to claim 11 , wherein the plastics material foam is selected from the group consisting of polyurethanes and polyvinyl alcohols.
13. Stent according to claim 1 , wherein the film ( 2 ) contains a plastics material or consists thereof.
14. Stent according to claim 13 , wherein the plastics material is selected from the group consisting of polyurethanes, latex and silicone.
15. A stent according to claim 1 , wherein the film ( 2 ) projects beyond the hollow body ( 1 ) at both ends.