Electron-beam sterilization of biological materials
First Claim
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1. A method for sterilizing a collagen-containing biological tissue comprising the steps of:
- crosslinking said biological tissue to form a crosslinked biological tissue;
maintaining said crosslinked biological tissue in a hydrated state; and
irradiating said crosslinked, collagen-containing biological tissue with a beam of accelerated electrons, wherein said biological tissue exposed to accelerated electrons is suitable for surgical implantation and said irradiated biological tissue is not significantly degraded following said irradiation of said crosslinked biological tissue.
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Abstract
A method for sterilizing collagen containing tissue includes crosslinking the tissue to form a crosslinked biological tissue. The tissue is maintained in a hydrated state. The crosslinked, collagen-containing tissue is sterilized by irradiating the tissue with a beam of accelerated electrons. The biological tissue exposed to accelerated electrons is suitable for surgical implantation. The irradiated biological tissue is not significantly degraded following irradiation. The irradiation can be performed on tissue that has been packed in a container in a hydrated state.
95 Citations
20 Claims
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1. A method for sterilizing a collagen-containing biological tissue comprising the steps of:
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crosslinking said biological tissue to form a crosslinked biological tissue; maintaining said crosslinked biological tissue in a hydrated state; and irradiating said crosslinked, collagen-containing biological tissue with a beam of accelerated electrons, wherein said biological tissue exposed to accelerated electrons is suitable for surgical implantation and said irradiated biological tissue is not significantly degraded following said irradiation of said crosslinked biological tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for preparing a biological tissue for implantation comprising:
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packaging a crosslinked, biological tissue in a container in a hydrated state; and terminally sterilizing the packaged biological tissue by exposing the packaged biological tissue to a beam of accelerated electrons, wherein the biological tissue exposed to accelerated electrons is suitable for surgical implantation and the irradiated biological tissue is not significantly degraded following said irradiation of said crosslinked biological tissue. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for sterilizing a biological tissue prior to implantation comprising:
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exposing a biological tissue to at least one crosslinking agent to produce a crosslinked biological tissue; adding an anticalcification agent in a buffer to the crosslinked biological tissue; rinsing the biological tissue treated according to the previous two steps, to form a rinsed biological tissue; packaging the rinsed biological tissue in a container in a hydrated state; and irradiating the package and the biological tissue with a beam of accelerated electrons, wherein the irradiated biological tissue is not significantly degraded following said irradiation of said crosslinked biological tissue. - View Dependent Claims (19, 20)
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Specification