A catheter system and method 10 for placing a medical device or medicine proximate an ostium. The catheter system 10 has a guide catheter 14 and a sheath 22 with an internal lumen 24 surrounds the guide catheter 14. One or more connecting components 34 extend axially form an actuating mechanism 38. An ostial locating member 42 extends from the far end 22 of the catheter 14. The ostial locating member 42 has flexible, radially extending struts 44 lie in an ostial plane 48 when they are advanced against the ostium after the expandable distal legs 70 have been expanded radially outward beyond the distal end 18 of the guiding catheter 14.
