Patent ID: 7493156

Claim:
A guide catheter, comprising: an outer sheath comprising an open lumen, a pre-shaped distal end, a distal tip, a proximal end, and at least one longitudinally disposed pre-stress line extending from the proximal end to the distal tip of the outer sheath; an inner sheath comprising an open lumen, the inner sheath disposed within the open lumen of the outer sheath, the inner sheath axially rotatable and longitudinally translatable relative to the outer sheath, a distal end of the inner sheath conforming to a shape of the outer sheath when the inner sheath is retracted, and the distal end of the inner sheath assuming a pre-formed shape different from the shape of the outer sheath when the distal end of the inner sheath is extended beyond the distal end of the outer sheath; a steering tendon disposed along the outer sheath, a distal end of the steering tendon connected to the distal tip of the outer sheath; a guide handle connected to the proximal end of the outer sheath, the guide handle comprising at least one longitudinally disposed pre-stress line aligned with the at least one longitudinally disposed pre-stressed line of the outer sheath, and at least two elongated separation grips positioned at the proximal end of the guide handle aligned substantially parallel to the at least one longitudinally disposed pre-stress line of the guide handle, the guide catheter configured such that separation of the guide handle into at least two sections along the at least one longitudinally disposed pre-stress line of the guide handle initiates separation of the outer sheath along the at least one pre-stress line of the outer sheath; a steering mechanism comprising a lever pivotably disposed on the guide handle, the steering mechanism connected to a proximal end of the steering tendon and providing a pulling force on the steering tendon in response to pivoting of the lever to adjustably change a shape of the pre-shaped distal end of the outer sheath; at least one pressure sensing device connected to the distal end of the inner sheath; and at least one electrical conductor coupled to the at least one pressure sensing device, the at least one conductor disposed within the inner sheath.