PTFE Bypass to Below-knee Arteries: Distal Vein Collar or Not? A Prospective Randomised Multicentre Study

Flow chart for 353 patients with critical ischaemia randomised to vein collar or no vein collar at the distal anastomosis in two groups: FemPopBK (femoro-politeal bypass below-knee) and FemDist (femoro-distal bypass).

Primary patency for the FemPopBK (a) and FemDist (b) bypass groups. In the log-rank-test stratification was used for “external support” as explained in “Hypotheses, power calculation, statistics, and ethics”. The standard error of the KM-curves did not exceed 10% anywhere in the curves.

Secondary patency for the FemPopBK (a) and FemDist (b) bypass groups. In the log-rank-test stratification was used for “external support” as explained in “Hypotheses, power calculation, statistics, and ethics”. The standard error of the KM-curves did not exceed 10% anywhere in the curves.

Limb salvage for the FemPopBK (a) and FemDist (b) bypass groups. In the log-rank-test stratification was used for “external support” as mentioned in “Hypotheses, power calculation, statistics, and ethics”. The standard error of the KM-curves did not exceed 10% anywhere in the curves.

Survival for all patients in the FemPopBK and FemDist bypass groups together. The standard error did not exceed 10% anywhere in the curve.