[The role of duplex scanning in determination of indications for shunting procedures in patients with Leriche syndrome].

Duplex scanning (DS) is the only available method for visualization of the internal aperture and arteries walls, to evaluate hemodynamic significance of stenosis. DS was used in 41 patients with aorto-femoral occlusions. The vessels diameter parallel with the specific features of the walls lesions and parameters of doppler frequency spectrum have been examined. In all patients the results of DS were compared with the results of paracentetic translumbal or i.v. digital angiography, equally with intraoperative evaluation. The classification of iliac arteries stenosis based on ultrasound examination has been proposed. In cases of stenosis less than 80% the results of DS appeared to be more accurate than results of angiography. In critical stenosis the results of DS coincided with the results of angiography. The use of DS in 11 patients without clinical and angiographical signs of stenosis made it possible to reveal the lesion and take the decision for bifurcation by-pass surgery. In 98% the results of DS coincided with the results of intraoperative evaluation. DS must be used in patients with Leriche syndrome.