04723549 is referenced by 787 patents and cites 17 patents.

A catheter for dilating occluded or stenotic blood vessels includes a collapsible filter device disposed between a dilating balloon and the distal end of the catheter. The collapsible filter device comprises a plurality of resilient ribs secured to the catheter at or adjacent the distal end thereof and extending generally axially toward the dilating balloon. Inflation of a filter balloon extends the ribs outward against the vessel wall to stretch filter material secured to the ribs across the vessel to form a cup shaped trap for fragments of a stenosis loosened by the dilating balloon. Upon deflation of the filter balloon, the resilient ribs retract against the catheter to retain the trapped fragments during withdrawal of the catheter. In the preferred embodiment, the ends of the ribs projecting generally toward the dilating balloon are secured to a ring which slides along the catheter. In use, the filter is extended and then the dilating balloon is inflated. Blood flow established by deflation of the dilating balloon carries stenosis fragments into the filter.

Method and apparatus for dilating blood vessels
Application Number
Publication Number
Application Date
September 18, 1986
Publication Date
February 9, 1988
Robert S Katz
33 Dinsmore Ave., Apt. 104, Framingham, 01701
Mark L Nagurka
5370 Melvin St., Pittsburgh, 15217
Mark H Wholey
816 Woodland Ave., Pittsburgh, 15139
Arnold B Silverman
Richard V Westerhoff
A61M 25/00
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