Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Arterial prosthesis – Made of synthetic material
Reexamination Certificate
2008-04-29
2008-04-29
Gherbi, Suzette (Department: 3738)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Arterial prosthesis
Made of synthetic material
C066S195000
Reexamination Certificate
active
07364587
ABSTRACT:
A method for providing dilation resistance to an implantable tubular graft includes the steps of (a) providing a graft having opposed open ends and a textile wall extending in a lengthwise direction therebetween defining a graft diameter, wherein the textile wall has radially extending yarns having a radial extent which inter-engage longitudinally extending yarns having a longitudinal extent to define a textile pattern and further wherein the radially extending yarns are obliquely oriented to the lengthwise direction of the graft, thereby defining a first acute angle from the lengthwise direction of the graft; (b) providing an elongate tubular mandrel having a diameter which differs from the graft diameter by a factor of at least 1.5; (c) positioning the graft over the mandrel to radially distend the graft, thereby reorienting the radially extending yarns to reduce the radial extent and to shift the radially extending yarns to a second acute angle from the lengthwise direction of the graft to define an reoriented textile pattern, wherein the second acute angle is greater than the first acute angle; and (d) heat setting the graft at a first temperature to set the inter-engaging yarns in the reoriented textile pattern to provide a graft with improved dilation resistance.
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Ippoliti et al.; Dacron knitted graft dilation assessment with helical CT scanning after aortoiliac surgery; Gornale Italiano Di Chirurgia Vascolare; vol. 7, No. 3; pp. 201-213.
Robinson et al. ; Graft dilation following abdominal aortic aneurysm resection and grafting ; The Australian and New Zealand Journal of Surgery, vol. No. 69, No. 12; Dec. 1999; pp. 849-851.
Dong Jerry Q.
Quinn William
Rakos Ronald
Sowinski Krzysztof
Spiridigloizzi John
Gherbi Suzette
Hoffmann & Baron , LLP
Sci-Med Life Systems, Inc.
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