Protuberant aneurysm bridging device deployment method

A method of treating a wide-necked aneurysm proximate a bifurcation in neurovasculature of a patient, the bifurcation having an inlet vessel providing blood flow to first and second outlet vessels, the method comprising:

• providing a bridging device for bridging the aneurysm, the bridging device comprising struts extending from an inlet anchoring portion thereof to an outlet anchoring portion thereof, the bridging device having a collapsed configuration and an expanded, deformed configuration in which the struts protrude outwardly from a center portion of the bridging device;
• positioning the outlet anchoring portion in the first outlet vessel;
• releasing the bridging device from the collapsed configuration into the inlet vessel to the expanded, deformed position in which the struts twist away from the collapsed configuration and protrude toward the aneurysm and the second outlet vessel;
• and
• positioning the inlet anchoring portion in the inlet vessel.

A method of treating an aneurysm in neurovasculature of a patient at a bifurcation of a parent artery into a first and second branch artery, the method comprising:

• advancing a first catheter to the bifurcation;
• advancing a bridging device from the first catheter to position a distal region of the bridging device across a neck of the aneurysm, the bridging device comprising a wire frame structure having a bridging region disposed between the distal region and a proximal region thereof, the bridging device being self-expandable from a small diameter configuration and a large diameter, deformed configuration;
• advancing the distal region from the first catheter to permit the distal region to expand into apposition with the first branch artery, thereby fixing the distal region within the first branch artery;
• adjusting the position of the bridging device, so that a proximal edge of the distal region is aligned with a junction of the aneurysm neck and the first branch artery;
• and
• advancing the bridging region from the first catheter to permit the bridging region to self-expand and twist relative to the distal region to assume the large diameter, deformed configuration spanning the aneurysm neck;
• and
• advancing the proximal region from the catheter to permit the proximal region to expand into apposition with the parent artery.