CPC A61F 2/958 (2013.01) [A61F 2/91 (2013.01); A61F 2/915 (2013.01); A61F 2002/30322 (2013.01); A61F 2002/821 (2013.01); A61F 2002/91525 (2013.01); A61F 2002/91533 (2013.01); A61F 2002/91558 (2013.01); A61F 2230/005 (2013.01); A61F 2230/0054 (2013.01); A61F 2230/0067 (2013.01); A61F 2250/0018 (2013.01); A61F 2250/0026 (2013.01); A61F 2250/0039 (2013.01); A61M 25/1002 (2013.01)] | 20 Claims |
1. An apparatus for locating an ostium of a body lumen, comprising:
an elongate member comprising a proximal end, a distal end sized for introduction into a body lumen; and
first and second expandable members on the distal end of the elongate member, the first and second expandable members being independently expandable from one another between a contracted condition and an enlarged condition;
the second expandable member comprising proximal and distal ends attached to the distal end of the elongate member, the second expandable member comprising an intermediate portion expandable from a contracted condition to an enlarged condition having a substantially uniform diameter;
the first expandable member comprising a proximal end attached on the elongate member distal end adjacent the second expandable member proximal end, a proximal portion, a distal portion extending over the intermediate portion of the second expandable member, and a distal end attached to the elongate member adjacent the second expandable member distal end, the first expandable member formed from material to a predetermined shape in which the proximal portion has a substantially spherical shape when expanded from a contracted condition to an enlarged condition that includes a tapered distal surface extending transversely outwardly and proximally from the distal portion and the distal portion has a substantially cylindrical shape, the intermediate portion of the second expandable member expandable to a predetermined size in the enlarged condition that is smaller than the proximal portion in its enlarged condition.
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