[The informativeness of ultrasonic scanning methods in obliterating diseases of the arteries of the lower extremities]. / Ob informativnosti metodov ul'trazvukovogo skanirovaniia pri obliteriruiushchikh zabolevaniiakh arterii nizhnikh konechnostei.

The authors studied the diagnostic possibilities of ultrasonic angiography and doppler sonography as compared to digital subtraction angiography. A total of 506 arterial segments was examined in 116 males suffering from various degree of atherosclerosis obliterans of the lower limb vessels. The coincidence of and disparity in the diagnosis were analysed on the aortoiliac and femoropopliteal levels according to three criteria: normal vessel, stenosis, occlusion. The diagnostic efficacy was appraised with the use of the Kapp index (K), the percentage of absolute coincidence of the diagnoses, sensitivity, and specificity. The precision of doppler sonography was found to be comparable with that of digital subtraction angiography. On the aortoiliac level K-0.68 +/- 0.06, on the femoropopliteal level K = 0.78 +/- 0.05. The diagnostic possibilities of ultrasonic angio-scanning were significantly lower. Thus, on the aortoiliac level K = 0.28 +/- 0.07, on the femoropopliteal level K = 0.4 +/- 0.05. Doppler sonography is therefore a reliable noninvasive method in the diagnosis of obliterating diseases of arteries of the lower limbs.

[The potentialities of Doppler sonography in evaluating the distal vascular channel in chronic obliterating diseases of the arteries of the lower extremities]. / Vozmozhnosti doplerovskoi sonografii v otsenke distal'nogo sosudistogorusla pri khronicheskikh obliteriruiushchikh zabolevaniiakh arterii nizhnikh konechnostei.

The work deals with the techniques of examination of the leg arteries in patients with atherosclerosis obliterans of the lower limb vessels by the method of doppler sonography (DS) and dopplerography. The authors examined 111 arterial segments in 43 patients. The results of these methods were compared with the findings of radiocontrast angiography. The absolute percentage of the coincidence of diagnosis (AP), sensitivity (Se), and specificity (Sp) of these methods were calculated according to two criteria--"normal" vessel and "occlusion". In DS, AP was 93 +/- 2%, Se-95 +/- 4%, Sp-93 +/- 2%, the respective values in dopplerography were 81 +/- 3%, 84 +/- +/- 11%, and 79 +/- 4%. The difference between these methods according to AP and Sp was statistically significant (p less than 0.001). The authors believe that the higher percentage of coincidences of diagnosis in DS is linked with the possibility of purposeful study of the blood flow in the vessel, being guided by its image.