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Implant passageway
| Details |
Inventors: Svenson, Jan A.; Axelsson, Robert;
Assignee:
Primary Examiner: Wilson; John J.
Assistant Examiner: LaViola; Frank A.
Attorney, Agent or Firm: Merchant & Gould Smith, Edell, Welter & Schmidt
Implant passageway for connection of body cavities, vessels or other organs to a device, container, pump or the like externally of the body, forming a tunnel and/or canal network inwardly of a smooth end portion for fixation and integration of the implant in the surrounding tissue. |
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DETAILED DESCRIPTION In the illustrated embodiment, the element 10 is tubular and can comprise e.
g.
an implanted conduit for peritoneal dialysis (abdominal dialysis).
The conduit can be rigid or flexible.
It forms a number of tunnel and/or canal networks 11, which are separated from the passage 12 through the element by a solid wall 13 and from the exterior surface of the element by an ingrowth zone 14, the openings of which are indicated at 15 and form circular apertures.
The connective tissue, which is indicated at 16, grows into the tunnel and/or canal network 11, matures and attains a structural organization resulting in the epithelium 17 being prevented from growing down along the surface of the element and infiltrating the layer of connective tissue next to the element to enclose eventually the element 10, which leads to rejection of the element.
The tissue ingrowth into the tunnel and/or canal network 11 should be such that the connective tissue inside the tunnel and/or canal network 11 becomes complete and attains full maturity, i.
e.
the tunnel and/or canal network 11 should be sufficiently large to allow the connective tissue cells as well as the blood-vessels necessary for the maintenance of the connective tissue to grow thereinto, thus creating conditions for the generation of connective tissue fibres and matrix by the connective tissue cells and for the maturation of the components of the connective tissue and normal renewal thereof, requiring that no part of the tunnel and/or canal network 11 should have a diameter less than 30 .
mu.
m.
According to the invention, the surfaces of the element 10, which are exposed to the surrounding tissue, consist of a biocompatible material, titanium being an excellent material of this kind.
The element 10 as a whole can consist of titanium, but preferably the element 10 is coated on said surfaces, i.
e.
the exterior surface of the element inside the tunnel and/or canal network il, with titanium by a thin layer thereof being deposited on a substrate by vacuum evaporation
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