[The role of color doppler sonography in the diagnosis of atherosclerotic changes in arteries of the lower extremities].

In this study doppler ultrasound methods were evaluated from the point diagnostical values, and were compared with the standard X-ray methods (angiography). One of the basic question was, whether noninvasive doppler ultrasonic methods could replace the invasive contrast angiography i. e. in what relations and volume. The investigations were done by CW Doppler and angiodynography, and the results obtained, were compared with the ones of angiography that was taken as the referent method. The 264 segments of blood vessels of lower extremities arterial three were analyzed, and then ranged into the advance defined categories, on the basis of the degree of obstruction. The evaluation of the data obtained was statistically accomplished by the means of "decision matrix" test, and results were displayed by positive predictive values. Positive predictive value for the CW Doppler was 94.07 (in groups varied from 93.10-100) and for angiodynography was 97.35 (in groups varied from 93.15 to 100). From the data obtained, it could be concluded that Doppler's methods are very accurate in a way of diagnostical interpretation (96.03%). The advantages of the Doppler's methods against the conventional standard radiological researches reflect in the following facts: they enable dynamic indicators in real time, they are noninvasive, very exact, and the possibility of verification of stenosis is enabling us to apply the adequate diagnosic (angiography) and therapeutic methods in time.