A system for providing lumen support and dilation includes a balloon catheter having an inner balloon (119) and an outer balloon (118) bonded to a shaft (116), with the outer balloon subsuming the inner balloon and defining an intermediate space therebetween. The outer balloon has holes formed in an outer wall, with the inner balloon being free from holes. The shaft includes a delivery lumen in communication with the intermediate space. Daughter balloons (150) are deliverable into the intermediate space through the delivery lumen and into engagement with holes formed in the outer balloon, where the daughter balloons are inflated and retained by the holes of the outer balloon. The catheter may include one or more preloaded wires (140) extending through the delivery lumen and into the intermediate space and through the holes, such that the daughter balloons are deliverable over the wires into the corresponding hole.
