Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Vocal cord
Patent
1985-11-18
1987-11-10
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Vocal cord
128 1R, 128346, 623 66, A61F 208, A61F 204
Patent
active
047055189
ABSTRACT:
An artificial sphincter apparatus and method, the artificial sphincter including a pair of parallel, coaxially mounted rings with at least one ring rotatable relative to the other. Optionally the rings are capable of being split open at their circumference and reclosed for mounting about a living tissue conduit for which surgical severing is not recommended. A plurality of circumferentially mounted tie members extend between the rings and are drawn laterally toward the center of the sphincter, narrowing a passageway therethrough, upon relative rotation between the rings. This action is capable of gently constricting a living tissue conduit within the passageway using a combination of rotational and circumferentially localized discrete radially compressive forces to control the flow of biological materials within the living tissue conduit. A cell impervious thin flexible tubular membrane envelopes the sphincter to isolate it from the immediate environment. The membrane has a central waist portion which fits within the openings in the rings and ends which fold outwardly around the sphincter for sealing together at the outer circumference thereof. In one embodiment of the invention such a membrane, when provided with compliant folds in the central waist portion thereof, replaces the plurality of tie members as a closure means for narrowing the passageway through the sphincter. Operation of the artificial sphincter after its implantation is effected by a number of disclosed remote and proximate actuation means.
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Baker Charles D.
Brimhall Owen D.
Galway Charles R.
Apley Richard J.
Cannon Alan W.
University of Utah Research Institute
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