Fourier analysis of peripheral blood pressure and flow in intraoperative assessment of infrainguinal arterial reconstructions.

Aim: To assess infrainguinal arterial reconstructions by intraoperative flowmetry under the distal anastomosis using a fast Fourier transformation; calculate and compare the amplitude ratios of peripheral arterial blood pressure and volume flow before and after drug-induced vasodilation of occluded bypass grafts and bypass grafts that have been patent at least for 1 year. To find what magnitude of the change of these ratios indicate a long-term patency of the bypass grafting.

Patients And Methods: We compared the results of the intraoperative flowmetry tests of 97 patients with infrainguinal arterial reconstructions.