Implant with intrasaccular and intravascular portions and related technology

A system for treating an aneurysm at a treatment location within a patient's vasculature, the system comprising:

• a elongate shaft defining an axial lumen and comprising a proximal end portion and a distal end portion opposite the proximal end portion along a length of the shaft, wherein the shaft is configured to move the distal end portion intravascularly toward the treatment location;
• and
• an implant in a low-profile delivery state within the lumen, wherein the implant is configured to expand from the delivery state to a deployed state, and wherein the implant comprises:
• an elongate first body, wherein a length of the first body extends between a first end of the first body and an opposite second end of the first body, and
• wherein the first body comprises:
• a first wall portion proximate to the first end and extending along a first part of the length of the first body,
• a second wall portion proximate to the second end and extending along a second part of the length of the first body, and
• a third wall portion extending along a third part of the length of the first body between the first and second parts of the length of the first body, wherein the third wall portion is distal to the first and second wall portions along the length of the shaft, and
• a second body connected to the first body via the third wall portion, wherein the second body is distal to the first body along the length of the shaft,
• wherein a distance along the length of the shaft between the second body and the first end is at least 3 millimeters shorter than a distance along the length of the shaft between the second body and the second end to facilitate sequential deployment of the first and second wall portions at the treatment location.

A method for treating an aneurysm at a treatment location within a patient's vasculature at which a first blood vessel, a second blood vessel, and a third blood vessel converge, the method comprising:

• locating a bulbous body of an implant within the aneurysm;
• and
• locating an elongate body of the implant within the vasculature outside the aneurysm after locating the bulbous body, wherein locating the elongate body comprises:
• engaging a wall of the first blood vessel via a convex first outer surface of a first wall portion of the elongate body,
• engaging a wall of the second blood vessel via a convex second outer surface of a second wall portion of the elongate body,
• engaging a wall of the vasculature between the first and second blood vessels via a convex third outer surface of a third wall portion of the elongate body, the third wall portion comprising a width extending between a first side of the third wall portion and an opposite second side of the third wall portion, wherein the elongate body comprises a first side edge portion proximate to the first side and a second side edge portion proximate to the second side, and wherein the second side edge portion is spaced apart from the first side edge portion to define an opening, and
• locating the opening relative to the third blood vessel such that at least some blood flow between the treatment location and the third blood vessel is via the opening.