Patent ID: 7959660

Claim:
A catheter device, comprising: an elongate catheter shaft comprising a monolayer multifilar tubing having a proximal portion and a tapered distal portion, the tubing defining a first tubing lumen; a polymeric coating covering at least a portion of the tubing; an expandable balloon including an expandable balloon lumen; a wire guide lumen formed in a dual-lumen sleeve attached near the distal end of the distal portion and wherein the wire guide lumen is disposed wholly external of, with its entire adjacent length being parallel to the multifilar tubing; and an inner coating segment covering a length of the tubing and disposed between the tubing and the wire guide lumen, where the inner coating segment extends from a terminus at about halfway through said tapered distal portion to a terminus just distal of an opening defining a proximal end of the wire guide lumen; wherein at least a part of the distal tubing portion is more flexible than the proximal portion; wherein the multifilar tubing terminates within the balloon lumen such that the first tubing lumen is in fluid communication with the balloon lumen; and the wire guide lumen extends through the balloon lumen, providing a patent path to a distal end of the balloon.