Expandable medical device with ductile hinges
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United States of America Patent
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Issued Date -
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app pub date -
Jul 11, 2001
filing date -
Oct 29, 1998
priority date (Note) -
Abandoned
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Abstract
An expandable tissue supporting device of the present invention employs ductile hinges at selected points in the expandable device. When expansion forces are applied to the device as a whole, the ductile hinges concentrate expansion stresses and strains in small well defined areas. The expandable tissue supporting device includes a plurality of elongated-beams arranged in a cylindrical device and connected together by a plurality of ductile hinges. Although many ductile hinge configurations are possible, the ductile hinges preferably have a substantially constant hinge cross sectional area which is smaller than a beam cross sectional area such that as the device is expanded from a first diameter to a second diameter, the ductile hinges experience plastic deformation while the beams are not plastically deformed. The expandable tissue supporting device can be provided with segments which may be expanded in a specified sequence and/or framed hole features for accommodating bifurcations.
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