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US 4,509,504 AGranted
Occlusion of body channels
AssigneeAB Medline
InventorJan-Olof Brundin
Life of this patent
Estimating the term…
Abstract
A method for obstructing channels, ducts and other hollow spaces in human and animal bodies is disclosed comprising inserting a device having a portion thereof adapted to swell at least 20% in size when in contact with the fluid of the human or animal body, the device being in a shape matching and cooperating with the channel to be obstructed.
Claims12
A method of occluding a body reproduction duct of an animal comprising the steps of
- (1) inserting a water-swellable contraceptive hydrogel article into said body reproduction duct;
- (2) bringing said hydrogel into contact with animal tissue fluid;
- (3) allowing said hydrogel to swell to an extent of at least 40% up to 300% of its original size and thereby
- (4) contacting and impinging upon the body duct in which said device is inserted,
- said device being substantially completely inert to said body fluid and the body tissue with which it is in contact, having a cross-sectional configuration corresponding to that of said reproduction duct and an indicator removal thread secured thereto.
2 more elements
A method for at least temporarily occluding a reproductive oviduct or spermatic duct of an animal for contraceptive purposes, said method comprising the steps of:
- (a) forming a body of water-swellable polymeric hydrogel to the extent of at least 20% in volume by absorbing water, said hydrogel being substantially inert to body fluid and the tissue of said reproductive duct;
- (b) shaping said hydrogel body into a cross-section which in the dry state is no larger than about the size of the cross-section of the reproductive duct;
- (c) inserting the shaped hydrogel body in the dry state into the reproductive duct at a predetermined distance from the opening of the duct;
- and
- (d) allowing the thus inserted shaped hydrogel body to remain in position, absorb water from the body fluid thereabout and anchoring itself by pressure against the surrounding walls of the duct.
2 more elements
Dependencies are inferred from the claim text.