ENDOLUMENAL PROSTHESIS AND METHOD OF USE IN BIFURCATION REGIONS OF BODY LUMENS

摘要

An endolumenal medical device assembly is provided for use in a bifurcation region of a body lumen. An expandable prosthesis, preferably an endolumenal supp ort device such as a stent, is included in the assembly and is adjustable from a rad ially collapsed condition to a radially expanded condition. The expandable prosthesis further includes a prosthesis passageway and a side port through which the prosthesis pa ssageway communicates externally of the prosthesis. A dilator or an access device is enga ged within the prosthesis passageway and also through the side port while the expand able prosthesis is in the radially collapsed condition. By coupling a guidewire to an access device engaged within the side port and positioning the guidewire therein, the e xpandable prosthesis may be positioned in the bifurcation region such that its distal end portion is in a first branch lumen extending from the bifurcation, its proximal end portion is in a common proximal lumen of the bifurcation region, and the side port is aligned wi th an entrance zone to a second branch lumen extending from the bifurcation. When the expandable prosthesis is positioned at the bifurcation region in this orientatio n, the access device maintains percutaneous translumenal access to the second branch lumen thr ough the prosthesis passageway and the side port while the expandable prosthesis is a djusted from the radially collapsed condition to the radially expanded condition. In add ition, a dilator when engaged within the side port is adapted to expand the bore formed b y the side port from an initial inner diameter to a larger expanded inner diameter. A second, lateral expandable prosthesis can also be coupled to the first expandable prosth esis at a location adjacent to the side port such that the dilator or access device extend ing through the side port is engaged within a lateral prosthesis lumen extending through the lateral expandable prosthesis.