A system for infusing fluid into a body of a subject includes an expandable medical device and a balloon catheter. The expandable medical device includes an expandable section that may be expanded and contracted and, when expanded, score a wall of a vessel or another open space within the body of the subject. The balloon catheter includes a balloon that expands when pressurized and can expand the expandable section. When pressure within the balloon is reduced, the expandable section can resiliently contract the balloon. The balloon may be shorter than the expandable section, enabling the balloon to be positioned at a plurality of locations along the length of the expandable section and to expand the expandable section to a plurality of different configurations. The system may be used to limit the flow of infused fluid beyond a target location within the body and/or to force fluid into the target location.
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