the distal end of lumen 52 such that distal opening 42 of lumen 50 is proximal of distal opening 44 of lumen 52 this particular embodiment advantageously minimizes the profile of sheath 40 methods of using the embolic filter system of the present invention will now be described in the context of an interventional therapeutic procedure such as angioplasty atherectomy thrombectomy stent placement or interventional diagnostic procedure to treat and or diagnose a lesion within a body lumen fig3 a 3f illustrate the rapid exchange of embolic filters using an embodiment of the present invention in practicing the subject invention a generic guide wire not shown is manipulated into position in vessel v using well known percutaneous techniques once the generic guide wire is positioned a multiple lumen delivery and retrieval sheath such as the multiple lumen delivery and retrieval sheath 40 of fig2 a may be tracked over the generic guide wire to guide the delivery and retrieval sheath within the vasculature e g lumen 50 may be used to track over the generic guide wire once delivery and retrieval sheath 40 is maneuvered into a position within vessel v distal lesion 4 the generic guide wire may be removed from the vasculature in certain embodiments positioning of the delivery and retrieval sheath 40 may be based on the position of.