SUPERABSORBENT, FREEZE DRIED HYDROGELS FOR MEDICAL APPLICATIONS
First Claim
1. A method for making superabsorbent hydrogel, comprising:
- forming a mixture by combining precursor components to initiate crosslinking of the precursor components;
freezing the mixture before crosslinking is complete; and
freeze drying the mixture to form the hydrogel.
2 Assignments
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Accused Products
Abstract
Methods are provided for making freeze dried hydrogel and structures therefrom that may be introduced into a patient'"'"'s body for medical applications. Precursor components are combined to initiate crosslinking. The combined precursor components are placed in a chilled tray, and allowed to crosslink to a desired level of complete crosslinking before and/or after being placed onto the tray. The partially crosslinked hydrogel is frozen and freeze dried. After freeze drying, the hydrogel is conditioned to substantially complete crosslinking, and formed into one or more structures, e.g., plugs, hemostatic, or other medical devices. For example, the hydrogel may be cut, machined, rolled, folded, compressed, and/or cored into that may be loaded into delivery devices that may be introduced into a body to implant or otherwise deliver the structures into the body, e.g., to seal a puncture or other passage through tissue.
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Citations
45 Claims
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1. A method for making superabsorbent hydrogel, comprising:
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forming a mixture by combining precursor components to initiate crosslinking of the precursor components; freezing the mixture before crosslinking is complete; and freeze drying the mixture to form the hydrogel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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16. A method for making hydrogel, comprising:
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combining precursor components to initiate crosslinking of the precursor components to form a hydrogel; placing the hydrogel onto a tray or container chilled below the freezing point of the combined precursor components; freezing the hydrogel before crosslinking is complete; freeze drying the frozen hydrogel; and conditioning the freeze dried hydrogel to substantially complete crosslinking of the precursor components. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification