| http://www.w3.org/ns/prov#value | - Briefly, and in general terms, the present invention provides for an ostial placement catheter assembly and a method for placing a therapeutic device with the catheter assembly, permitting improved accuracy and decreased variability in positioning of a therapeutic device such as a graft or stent at an ostium of a bifurcation of a body lumen, by providing a mechanical stop, allowing the graft or st
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