Patent ID: 8753329

Claim:
A guide catheter assembly comprising: an outer guide catheter including: a flexible elongate shaft having a proximal portion and a distal portion terminating in a distal tip, and a lumen extending through the proximal portion and the distal tip, the distal portion having a preformed shape and including first, second, third, and fourth arc segments and a terminal segment arranged such that the distal portion lies in a plan and is in the shape of a J-shape or an generally open arc, the distal portion having an overall length from approximately 4.2 inches to approximately 11.9 inches, wherein: the first arc segment has a first arc radius ranging from approximately 3 inches to approximately 4 inches; the second arc segment has a second arc radius ranging from approximately 1.2 inches to approximately 1.8 inches; the third arc segment has a third arc radius ranging from approximately 2.2 inches to approximately 3.7 inches; the fourth arc segment has a fourth arc radius ranging from approximately 1 inch to approximately 1.5 inches; and the terminal segment extends from the fourth arc segment and has a length of up to approximately 1.9 inches; and an inner catheter slidably and rotatably disposed in the lumen of the outer guide catheter, the inner catheter having a preformed distal end extendable distally beyond the distal tip of the outer guide catheter.