| 摘要 |
Surgical instrument for the treatment of stenotic and occlusive coronary artery disease whereby the lumen of the coronary artery is longitudinally incised sub-epicardially through an area of narrowing or obstruction immediately whereafter dilation of the arterial lumen at the site of the stenotic blockage and arterial incision is effected by expansion under pressure of a balloon (16) passed to the site through the artery. The coronary artery cutting and dilating instrument (10) has a flexible probe (13) at the distal end for guidance through the coronary artery, following, in succession, by one or more radially extending knife blades (15) for making the coronary incision and an inflatable balloon (16) for dilating the stenotic artery zone immediately after the incision. A flexible inflating and control tube (13) extends from the balloon (16) to the proximal end, whereat a surgical syringe (20) is connectable to effect hydraulic inflation of the balloon (16). The proximal tubular extension (12) of the instrument is either short for use in exposed heart surgery on the beating heart by passage through the coronary artery beneath a purse-string incision made in the epicardium overlying the affected artery within a few centimeters from the blockage, or comparatively long for application through a catheter (23) introduced via a peripheral artery. |
