Textile prostheses having particular knit configuration including two-needle overlap stitch
AssigneeVascutek Limited
InventorMichael Litton
Life of this patent
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Abstract
The present invention relates to a fabric for the construction of knitted tubular grafts for use in cardiovascular surgery and to methods of manufacturing these grafts. The fabric of the present invention is constructed so that grafts formed from it will have an increased hoop modulus due to the fabric having a underlap of greater than two needle spaces in the bar nearer to the technical face of the fabric.
Claims20
A tubular knitted fabric for a surgical graft, the fabric being defined by a technical face and a technical back, wherein, during knitting of the fabric, the route of yarn sheets in the fabric is determined by bars, and wherein the fabric contains a two-needle overlap chain and is knitted using a stitch which has an underlap of greater than two needle spaces in the bar nearer to the technical face.
A process for the production of a fabric, the process comprising the steps of:
- knitting a fabric in tubular form, said fabric defined by a technical face and a technical back;
- determining the route of yarn sheets in the fabric using bars;
- and
- using a stitch comprising a two-needle overlap chain and having an underlap of greater than two needle spaces in the bar nearer to the technical face.
A tubular surgical graft knitted from a fabric defined by a technical face and a technical back, wherein, during knitting of the fabric, the route of yarn sheets in the fabric is determined by bars, and wherein the fabric contains a two-needle overlap chain and is knitted using a stitch which has an underlap of greater than two needle spaces in the bar nearer to the technical face.
Dependencies are inferred from the claim text.