Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis
Patent
1993-07-07
1995-06-20
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
623 12, 604174, 606155, 606153, A61F 202
Patent
active
054257611
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to an implant with a through passage and is intended to be applied as a passage through the skin or a membrane of the human body, the implant comprising a tubular body provided with a radially protruding circular perforated flange.
Implants of this type are disclosed e.g. in DE-A-26 45 990, U.S. Pat. Nos. 4,217,664, 3,663,965, EP-A1-0 367 357 and WO 87/06122. In all those cases, the flange is intended to be disposed under the skin. According to for example EP-A1-0 367 357 and WO 87/06122 the flange is disposed in the connective tissue under the skin in order to permit the growth of connective tissue through the perforation of the flange for anchoring of the implant. For the purpose of preventing downward epithelial growth around the implant and thus preventing the rejection of the implant the tubular body is arranged, according to WO 87/06122, with grooves which are delimited between perforated flanges in order to permit the growth of connective tissue into these grooves and thus preventing the downward growth of the epithelial layer along the tubular body.
The object of the invention is to bring about an implant of the above mentioned type, which combines great bearing capacity, i.e. large bearing surface of the flange, with good stability, i.e. good retention of the flange due to growth of the surrounding connective tissue into said flange, the downward epithelial growth at the same time being prevented by the growth of connective tissue into the flange. The implant according to the invention is adapted to be used as a passage through the skin in order to be accessible from the outside to the interior of the organism through the passage in the tubular body, but it may also advantageously be used as a passage in a membrane, for example the peritoneum, the intestinal wall or other membranes of body cavities in the organism.
In order to further explain the invention reference is made to the accompanying drawing, in which
FIG. 1 is a side view and a sectional view which shows the use of the implant according to the invention partly as a passage through the skin and partly as a passage through e.g. an intestinal mucous membrane in order to achieve a connection from the outside to the interior of the intestine,
FIG. 2 is a plan view of the flange on the implant,
FIG. 3 is an axial sectional view of a practical embodiment according to the invention arranged as a passage through the skin, the left half of the figure showing the implant with bone support and the right half showing the implant with soft-tissue support, and
FIG. 4 is a plan view of the implant in FIG. 3.
The implant should be made of a biocompatible material, for example titanium or a suitable plastic. It comprises, according to FIGS. 1 and 2, a body 10 having a through channel 11. One end the body forms a circular or disc-shaped flange 12 whereas the other end forms an enlarged ball-shaped or bulbous portion 13 which can be more or less spherical but also may be mushroom-shaped. This portion connects to the flange at a circular neck 14 with a concavely rounded surface.
The flange is perforated and the perforation consists of slots 15 which extend concentrically in the circumferential direction of the flange and which overlap each other or are arranged one upon the other as shown in FIG. 2. As few bridges 12' as possible should be arranged between the slots in every ring of slots; at least three bridges should be provided, however, for strength reasons.
In FIG. 1 two identical implants are connected with each other by a catheter 16, one implant forming a passage in the skin 17 while the other implant forms a passage in for example an intestinal wall 18 with an intestinal mucous membrane 18', the implant with the catheter in between forming a permanent connection from the outside to the interior of the intestine for sampling the contents of the intestine or for supplying medicine or the like to the intestine. That implant which forms the passage through the skin has its flange 12 located in the connective tissue under th
REFERENCES:
patent: 3461869 (1969-08-01), Hargest
patent: 3663965 (1972-05-01), Lee, Jr. et al.
patent: 3818511 (1974-06-01), Goldberg et al.
patent: 4217664 (1980-08-01), Faso
patent: 4534761 (1985-08-01), Raible
patent: 4623348 (1986-11-01), Feit
patent: 4704126 (1987-11-01), Baswell et al.
patent: 4781176 (1988-11-01), Ravo
patent: 4781694 (1988-11-01), Branemark et al.
patent: 4854316 (1989-08-01), Davis
patent: 4886502 (1989-12-01), Poirier et al.
patent: 4897081 (1990-01-01), Poirier et al.
patent: 4946444 (1990-08-01), Heimke et al.
patent: 4976735 (1990-12-01), Griffith et al.
patent: 5084024 (1992-01-01), Skinner
patent: 5147374 (1992-09-01), Fernandez
patent: 5234408 (1993-08-01), Griffith
patent: 5242415 (1993-09-01), Kantrowitz et al.
Mason, Jr. Joseph C.
Smith Ronald E.
Willse David H.
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