No-touch versus conventional vein in coronary artery bypass grafting: three year follow-up of multicentre randomised PATENCY trial
Objective To assess the three year outcomes of the no-touch vein harvesting technique in coronary artery bypass grafting surgery compared with the conventional approach. Design Three year extended follow-up of the randomised PATENCY (graft patency between the no-touch vein harvesting technique and conventional approach in coronary artery bypass graft surgery) trial. Setting Seven cardiac surgery centres in China; enrolment between April 2017 and June 2019. Participants 2655 participants aged 18 and older undergoing isolated coronary artery bypass grafting surgery. Interventions Patients were randomly assigned 1:1 to the no-touch vein harvesting technique group or the conventional approach group during surgery and followed up. Main outcome measures Vein graft occlusion (based on computed tomography angiography) at three years. Results Mean age of participants was 61 years (standard deviation ±8 years) and 22% were women. 99.4% (2621) attended the three year follow-up visit, while 86.5%
