Embolization device constructed from expansile polymer
First Claim
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1. A device for occlusion of a lumen in an animal comprising:
- a narrow, elongated, flexible expansile element comprising a hydrogel configured to expand upon contact with an aqueous liquid at a physiological pH, wherein the hydrogel comprises a reaction product of;
a monomer having a pH sensitive ionizable functional group and an ethylenically unsaturated moiety;
a polyether macromer selected from poly(ethylene glycol) di-acrylamide, poly(ethylene glycol) di-acrylate, poly(ethylene glycol) dimethacrylate, poly(ethylene glycol) dimethacrylamide, derivatives thereof, or combinations thereof; and
a polymerization initiator; and
wherein a cylindrical sample of the hydrogel having a diameter of about 0.02 inches and a length of about 1 inch has an unexpanded bending resistance of about 0.1 mg to about 50 mg; and
a flexible carrier member, composed of a non-hydrogel material, configured to assist the delivery of the expansile element through a body lumen for occlusion of the lumen by expansion of the expansile element.
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Abstract
Devices for the occlusion of body cavities, such as the embolization of vascular aneurysms and the like, and methods for making and using such devices. The devices may be comprised of novel expansile materials, novel infrastructure design, or both. The devices provided are very flexible and enable deployment with reduced or no damage to bodily tissues, conduits, cavities, etceteras.
69 Citations
18 Claims
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1. A device for occlusion of a lumen in an animal comprising:
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a narrow, elongated, flexible expansile element comprising a hydrogel configured to expand upon contact with an aqueous liquid at a physiological pH, wherein the hydrogel comprises a reaction product of; a monomer having a pH sensitive ionizable functional group and an ethylenically unsaturated moiety; a polyether macromer selected from poly(ethylene glycol) di-acrylamide, poly(ethylene glycol) di-acrylate, poly(ethylene glycol) dimethacrylate, poly(ethylene glycol) dimethacrylamide, derivatives thereof, or combinations thereof; and a polymerization initiator; and wherein a cylindrical sample of the hydrogel having a diameter of about 0.02 inches and a length of about 1 inch has an unexpanded bending resistance of about 0.1 mg to about 50 mg; and a flexible carrier member, composed of a non-hydrogel material, configured to assist the delivery of the expansile element through a body lumen for occlusion of the lumen by expansion of the expansile element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification