A stent includes a first coiled wire, which forms a first lumen defined by an inner surface. The stent further includes a second coiled wire with an outer surface. The second coiled wire forms a second lumen, is disposed within the first lumen of the first coiled wire, and is secured to the first coiled wire such that substantially the entire outer surface of the second coiled wire contacts substantially the entire inner surface of the first coiled wire. The first and second coiled wires are aligned with respect to each other. The stent further includes apertures passing through each of the first and second coiled wires and into the second lumen. The apertures are located within distal end portions, proximal end portions, and central portions of the first and second coiled wires.
