INTRAVASCULAR DELIVERY SYSTEM AND METHOD FOR PERCUTANEOUS CORONARY INTERVENTION

摘要

The subject guide catheter extension/pre-dilatation system includes an outer delivery sheath, an inner member extending within the sheath, and a mechanism for engagement/disengagement of the inner member to/from the sheath. The inner member is configured with a tapered distal tip having a delivery micro-catheter and a predilatation balloon member attached to the tapered distal tip in proximity to the microcatheter. The outer delivery sheath and the inner member are modified for different engagement/disengagement mechanisms operation. During the cardiac procedure, a guidewire and a guide catheter are advanced to the vicinity of the treatment site, then the inner member and outer delivery sheath are advanced along the guidewire inside the guide catheter. Once at the treatment site, the balloon member is inflated, subsequently, the inner member is disengaged and retracted from the outer delivery sheath, and a stent is delivered to the treatment site inside the outer delivery sheath.