A sterile flexible tube intended to be used for the percutaneous transluminal passage and placement of guidewires and/or diagnostic/interventional devices (e.g., pacing leads, balloon dilatation catheter, stent and delivery system, or embolization device) within the vascular system. The guide catheter may be rigid or flexible, non-steerable or steerable, and the distal section of the tube can have a variety of preformed shapes (e.g., straight, multi-purpose, hockey stick, renal double curve); it typically has radiopaque markers so that it can be fluoroscopically tracked. It may include disposable introduction devices (e.g., needle, guidewire, dilator). This is a single-use device.