| 摘要 |
An apparatus for in-situ cutting through one-way valves in a vein to convert the vein for use as an artery and a method therefor. The apparatus employs a cutting catheter and a pulling catheter. The pulling catheter is advanced through the vein in the normal direction of blood flow and is then connected to a cutting catheter and pulled back reversely through the one-way valves. The cutting catheter carries cutting blades which sever the valve cusps. The connection between the two catheters is effected by a filament which can be swiftly and readily connected to the pulling catheter. The cutting catheter employs a viewing scope which can be utilized to observe the valve cusps and align the cutting blades with the cusps to achieve effective cutting.
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