A collection of sterile, invasive devices intended to enable introduction of a central venous catheter (CVC) into an occluded vein (e.g., subclavian) by creating a puncture site from the inside of the vein under fluoroscopic guidance. It typically includes: an introducer sheath, for initial vascular access via a secondary vein (e.g., femoral); a semi-rigid, noncoring, endovascular guide sheath assembly with a distal side-hole, intended to navigate into, and be stabilized by, the vascular occlusion; a percutaneous needle-wire, intended to puncture the vein/tissue to exit at the skin surface; and a sheath for introduction of a CVC; the catheter is not included. This is a single-use device.