Adhering prosthetic knitting fabric, method for making same and reinforcement implant for treating parietal deficiencies
AssigneeSofradim Production
InventorsFrancois-Regis Ory, Michel Therin, Alfredo Meneghin
Life of this patent
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Abstract
A prosthetic knit for medical or surgical use which has a structure made of monofilament and/or multifilament yarn which is biocompatible and optionally partially bicabsorbable. According to the invention, this knit comprises a monofilament sheet forming, on one face of the knit, spiked naps which protrude perpendicularly with respect to said sheet, that is to say naps each having a substantially rectlinear body and, at the free end of this body, a head of greater width than that of this body.
Claims19
A prosthetic knit for medical or surgical use whose structure is made up of monofilament and/or multifilament yarn which is biocompatible, wherein said prosthetic knit comprises a monofilament sheet forming, on one face of said prosthetic knit, spiked naps which protrude perpendicularly from said sheet, said spiked naps each having a substantially rectilinear body and a free end having a head of greater width than that of said rectilinear body.
A method for production of a prosthetic knit said method comprising:
- (i) producing a looped knit on a warp knitting machine, with at least three sheets of yarns and the same number of guide bars, namely:
- a rear bar which is threaded, one guide full and one guide empty, with a monofilament forming spiked naps,
- an intermediate bar which is threaded, one guide full, three guides empty, forming a light ground texture which is openworked and stable in width,
- a front bar which is threaded, one guide full, one guide empty, these three bars working according to the following chart:
- Warp →
- Rear bar I
- Intermediate bar II
- Front bar III
- Raschel →
- Front bar I
- Intermediate bar II
- Rear bar III
- 7
- 3
- 1
- 7
- 2
- 0
- —
- —
- —
- 3
- 4
- 0
- 4
- 5
- 1
- —
- —
- —
- 0
- 1
- 0
- 0
- —
- —
- 4
- 2
- 3
- 3
- —
- 1
- 0
- —
- 4
- 5
- (ii) thermosetting the looped knit, and
- (iii) transforming the loops to spiked naps by pressing the knit flat as it crosses a cylinder maintained at a temperature which results in melting of the heads of the loops and formation of the spikes.
A method for production of a prosthetic knit, said method comprising:
- (i) producing a looped knit on a warp knitting machine with at least three sheets of yarns and the same number of guide bars, namely:
- a rear bar which is threaded, one guide full and one guide empty, with a monofilament forming spiked naps moving in accordance with one of the weaves indicated below, depending on the desired density of the spiked naps:
- 00/43/77/34/00;
- 00/43/77/77/34/00;
- 00/43/77/44/77/34/00/33/00;
- an intermediate bar threaded, one guide full, one guide empty, working in chain weave 10/01 or 01/10;
- a front bar threaded full, or in an arrangement with one yam or with two yarns of different materials, originating from one reel or from two reels, giving one or other of the following weaves:
- 32/01;
- 45/32/45/0 1/23/10.
A prosthetic implant for tissue reinforcement, comprising a grip element, including a grip face having spiked naps arranged and/or disposed to penetrate in a limited manner and fasten within a thickness of a textile structure of another element of said implant, when the grip face of said grip element is arranged against a non-grip face, without spiked naps, of said another element.
Dependencies are inferred from the claim text.