Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis
Reexamination Certificate
1998-08-25
2001-01-30
Isabella, David J. (Department: 3738)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
C606S151000, C606S153000, C606S213000
Reexamination Certificate
active
06180848
ABSTRACT:
The present invention relates to a prosthesis obturating device used to obturate a hernial canal.
In conventional techniques, hernial canal repair is generally carried out by suturing. However, that method of repair is not entirely satisfactory: given that the suture line is subject to a large amount of tension, there is a risk of tearing, which could then lead to recurrence of the hernia. Further, even in the absence of tearing, any tension is synonimous of post-operating pain for the patient.
In order to mitigate that disadvantage, tension-free hernia repair techniques have been proposed.
In particular, a known technique is to position a sheet of synthetic prosthesis material, of tulle mesh or analogous type, at the superficial orifice of the hernial canal, to reinforce or replace the weakened tissue. For example, in open surgical repair of an inguinal hernia, a piece may be used which is positioned on the inguinal ring, on the side remote from the peritoneum, this band being slit to allow the spermatic cord to pass, and the two tails of the band are then wound around the spermatic cord. The barrier thus created makes it possible for the inguinal canal floor to regenerate.
Such a barrier-forming patch may also be positioned by non-invasive surgery. A device using a trocar to deploy prosthesis sheets inside the abdominal cavity, on the peritoneum, is described in EP 0 544 485, for example.
Another tension-free repair technique, which may be used in combination with the above-mentioned consists in obturating the hernial orifice with a prosthesis or obturating device.
Usually a surgeon makes an obturating device by rolling a patch cut out from prosthesis material in order to obtain a cylinder of appropriate dimensions.
Other shapes of prosthesis obturating devices are also used, such as rectangular obturators, conical obturators or collared obturators enabling them to be positioned relative to the hernial orifice. The following may be consulted in that respect:
“Prosthesis and Abdominal Wall Hernias”, Robert Bendavid, RG Landes Company, Austin, pages 375-379, 380-382, 383-388, 389-398, 408-410, 411-412, 413-414, 446-449, and also U.S. Pat. No. 5,116,357 and U.S. Pat. No. 5,356,432.
Other known prostheses are constituted by cylindrical obturators terminating at one end with prosthesis sheets for suturing by the surgeon to the non-weakened muscles on either side of the hernial orifice to complement the obturation provided by the obturator. In that respect reference may advantageously be made to U.S. Pat. No. 5,219,077 and U.S. Pat. No. 5,249,682, for example.
The object of the invention is to propose a prosthesis obturating device which is simple in structure and simple to manipulate and which is also very efficient.
The invention therefore provides a prosthesis obturating device to obturate a hernial canal comprising a part made of sheet(s) material for extending through the hernial canal and being characterized in that this first part is extended, at its end that is to be adjacent to the hernial cavity (abdominal cavity), inside this hernial cavity, by a second part, also made of sheet material and for covering the internal orifice of the hernial canal.
Given this structure, the first part which is inserted in the hernial canal to obturate it, is reinforced by a barrier-forming part which, because it is positioned on the inside of the hernial cavity and not on the outside, presents very good resistance to the abdominal pressure inside the hernial cavity.
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Arnaud Axel
Flament Jean Bernard
Ethicon Inc.
Isabella David J.
Koh Choon P.
LandOfFree
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