Multi-layer tissue systems and methods
First Claim
1. A method of manufacturing a multi-layer amnion tissue patch, the method comprising:
- contacting 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, with 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;
placing the contacted first and second fetal sac amnion tissue layers in a pouch;
removing air from the pouch while keeping the contacted first and second fetal sac amnion tissue layers moist;
placing the pouch containing the contacted first and second fetal sac amnion tissue layers in a press mechanism; and
pressing the pouch with the press mechanism, so that the first amnion tissue layer and the second amnion tissue layer are pressed against each other so as to form the multi-layer amnion tissue patch, such that the epithelial layers of the first and second tissue layers define first and second opposing outer surfaces of the patch, respectively, and a compressed, coupled fibroblast region is disposed between the first and second opposing outer surfaces of the patch, the compressed, coupled fibroblast region having an interface of entangled fibers of the first and second fibroblast layers.
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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.
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Citations
13 Claims
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1. A method of manufacturing a multi-layer amnion tissue patch, the method comprising:
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contacting 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, with 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; placing the contacted first and second fetal sac amnion tissue layers in a pouch; removing air from the pouch while keeping the contacted first and second fetal sac amnion tissue layers moist; placing the pouch containing the contacted first and second fetal sac amnion tissue layers in a press mechanism; and pressing the pouch with the press mechanism, so that the first amnion tissue layer and the second amnion tissue layer are pressed against each other so as to form the multi-layer amnion tissue patch, such that the epithelial layers of the first and second tissue layers define first and second opposing outer surfaces of the patch, respectively, and a compressed, coupled fibroblast region is disposed between the first and second opposing outer surfaces of the patch, the compressed, coupled fibroblast region having an interface of entangled fibers of the first and second fibroblast layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification