Method of repairing perforated submucosal tissue graft constructs
First Claim
1. In a method of preparing an improved unitary multilaminate tissue graft construct, said method comprising overlapping at least a portion of a strip of intestinal submucosa tissue with another strip of submucosa tissue, wherein the strips of submucosa tissue are delaminated from both the tunica muscularis and the luminal portion of the tunica mucosa of a warm blooded vertebrate;
- and comprising at least the overlapped portions of the strips of submucosa tissue under conditions allowing at least partial dehydration of the compressed submucosa tissue;
the improvement comprising the step of perforating the overlapped portions of submucosa tissue to form perforations to decrease fluid retention in the graft and enhance the adhesion of adjacent layers.
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Abstract
A perforated unitary multi-laminar tissue graft construct and method for preparing such construct is described. The method comprises overlapping strips of submucosa tissue with other strips of submucosal tissue, compressing at least the overlapped portions of said strips between two surfaces under conditions that allow or promote dehydration of the compressed submucosa sheets, and perforating the resulting unitary tissue graft construct. The perforated tissue graft compositions have enhanced mechanical and remodeling properties relative to non-perforated submucosal tissue grafts.
259 Citations
18 Claims
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1. In a method of preparing an improved unitary multilaminate tissue graft construct, said method comprising overlapping at least a portion of a strip of intestinal submucosa tissue with another strip of submucosa tissue, wherein the strips of submucosa tissue are delaminated from both the tunica muscularis and the luminal portion of the tunica mucosa of a warm blooded vertebrate;
- and comprising at least the overlapped portions of the strips of submucosa tissue under conditions allowing at least partial dehydration of the compressed submucosa tissue;
the improvement comprising the step of perforating the overlapped portions of submucosa tissue to form perforations to decrease fluid retention in the graft and enhance the adhesion of adjacent layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- and comprising at least the overlapped portions of the strips of submucosa tissue under conditions allowing at least partial dehydration of the compressed submucosa tissue;
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9. In a method of preparing an improved unitary multi-laminate tissue graft construct, said method comprising overlapping a portion of a strip of intestinal submucosa tissue with another strip of submucosa tissue, wherein each strip of submucosa tissue has first and second planar surfaces and each strip of submucosa tissue is delaminated from both the tunica muscularis and at least the luminal portion of the tunica mucosa of a warm blooded vertebrate, to form a graft construct having a planar surface with a surface area greater than the surface area of any one planar surface of the individual strips of submucosa tissue used to form said construct;
- and compressing the overlapped portions of the strips of submucosa tissue under conditions allowing at least partial dehydration of the compressed submucosa tissue to form perforations;
the improvement comprising perforating the submucosa tissue to decrease fluid retention in the graft and enhance the adhesion of adjacent layers. - View Dependent Claims (10, 11, 12)
- and compressing the overlapped portions of the strips of submucosa tissue under conditions allowing at least partial dehydration of the compressed submucosa tissue to form perforations;
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13. In a method of preparing an improved unitary multi-laminate tissue graft construct, said method comprising overlapping at least a portion of a strip of intestinal submucosa tissue with another strip of submucosa tissue, wherein the strips of submucosa tissue are delaminated from both the tunica muscularis and at least the luminal portion of the tunica mucosa of a warm blooded vertebrate;
- and compressing at least the overlapped portions of the strips of submucosa tissue under conditions allowing at least partial dehydration of the compressed submucosa tissue;
the improvement comprising perforating the overlapped portions of submucosa tissue wherein the perforated portion of the graft has at least 2 perforations per cm2 to decrease fluid retention in the graft and enhance the adhesion of adjacent layers. - View Dependent Claims (14, 15, 16, 17, 18)
- and compressing at least the overlapped portions of the strips of submucosa tissue under conditions allowing at least partial dehydration of the compressed submucosa tissue;
Specification