Patent ID: 7713552

Claim:
A radiopaque, implantable biomaterial device, comprising: a bioabsorbable collagenous biomaterial including a plurality of collagenous strips that are bonded to one another to form a layered structure, wherein said collagenous strips comprise tunica submucosa tissue from a warm-blooded vertebrate tissue source and said collagenous biomaterial is effective to promote remodeling of tissue of a patient at a site at which said collagenous biomaterial is implanted, and wherein said strips are bonded to one another by using sutures, staples, or biocompatible adhesives or by dehydrating overlapping strips, said layered structure including a first collagenous strip having a surface opposing a surface of a second collagenous strip; and a radiopaque marker positioned and completely contained between said opposing surfaces of said first collagenous strip and said second collagenous strip.