Intra-operative Doppler Flow Measurement do not Predict 'At-risk' Status of Infrainguinal Bypass Grafts

Despite normal intra-operative Doppler flow measurements, 35% of vein grafts were regarded as being at risk at the 1 week post-operative duplex surveillance scan. No single value may be universally applicable for identifying at risk grafts intraoperatively. Indeed, graft failure appears to be a multifactorial process.