ABSTRACT
All these factors may contribute to the initial failure rate of these bypass conduits, particularly when the outow tracts are limited.5 Although the most recent methods of preparing excised vein gras have been directed towards the prevention of these injuries,6 none is perfect. At present we believe that the closest approximation to an ideal conduit (i.e. one with normal, viable, physiologically functioning endothelium and a natural taper) is a vein that has been retained in situ and is minimally damaged during its preparation for bypass.
