Multi-layer tissue patches
First Claim
1. A multi-layer amnion tissue patch, comprising:
- a first fetal sac amnion tissue layer having an epithelial layer, a basement membrane, a compact layer, and a fibroblast layer from which a spongy layer has been removed, the fibroblast layer including a loose network of reticulum; and
a second fetal sac amnion tissue layer having an epithelial layer, a basement membrane, a compact layer, and a fibroblast layer from which a spongy layer has been removed, the fibroblast layer including a loose network of reticulum,wherein the epithelial layers of the first and second tissue layers define first and second opposing outer surfaces of the patch, respectively, andwherein a compressed, coupled fibroblast region is disposed between the first and second opposing outer surfaces of the patch, the compressed, coupled fibroblast region comprising fibers of the first fibroblast layer entangled with fibers of the second fibroblast layer.
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Abstract
Embodiments of the present invention encompass anti-adhesion wound dressings including patches made from amnion tissue obtained from human birth tissue. Exemplary amnion patches can be fabricated by folding a section of amnion over on itself with the epithelial layer on the outside of the folded patch and the fibroblast layer on the inside of the folded patch. Optionally, individual amnion tissue pieces can be sandwiched together to provide a multi-layer patch. Sufficient pressure is applied to the layered amnion to cause adherence between opposing faces of the fibroblast layers. The pressed fibroblast layers provide mechanical strength to hold the amnion patch together with the epithelial layers on the outsides of the amnion patch.
146 Citations
15 Claims
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1. A multi-layer amnion tissue patch, comprising:
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a first fetal sac amnion tissue layer having an epithelial layer, a basement membrane, a compact layer, and a fibroblast layer from which a spongy layer has been removed, the fibroblast layer including a loose network of reticulum; and a second fetal sac amnion tissue layer having an epithelial layer, a basement membrane, a compact layer, and a fibroblast layer from which a spongy layer has been removed, the fibroblast layer including a loose network of reticulum, wherein the epithelial layers of the first and second tissue layers define first and second opposing outer surfaces of the patch, respectively, and wherein a compressed, coupled fibroblast region is disposed between the first and second opposing outer surfaces of the patch, the compressed, coupled fibroblast region comprising fibers of the first fibroblast layer entangled with fibers of the second fibroblast layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification