Patent ID: 7765014

Claim:
A method for delivering an instrument to a target location within a patient's vasculature, the method comprising: introducing a distal end of an elongate rail into the vasculature; advancing the distal end of the rail to a location beyond the target location; securing the distal end of the rail at the location beyond target location by threading a helical anchor of the rail into adjacent tissue; introducing an elongate tubular member over the secured rail by backloading a proximal end of the secured rail into a first lumen of the elongate tubular member, via a first outlet of the first lumen, the first lumen extending between a proximal end and a distal end of the tubular member, and the first outlet being at the distal end of the tubular member; advancing the elongate tubular member over the secured rail until a second outlet of a second lumen of the elongate tubular member is adjacent to the target location, the second lumen extending between the proximal end and the distal end of the tubular member, and the second outlet being in proximity to the distal end of the tubular member; and delivering the instrument through the second lumen and out the second outlet to the target location.