To clarify the criteria for stenosis of the celiac artery during ultrasound duplex scanning

BACKGROUND: Criteria for stenosis of the celiac artery in duplex ultrasound diagnostics based on measurements of peak systolic velocity of blood flow are still a discussed topic for the diagnosis of blood flow disorders in the branches of the abdominal aorta. AIM: To clarify the calculation formulas for determining the degree of emergency stenosis based on the literature speed indicators, compare the results obtained with each other and with angiographic data. MATERIALS AND METHODS: When calculating the dependence of the degree of stenosis on the speed of blood flow, the theoretical prerequisites of the mechanics of incompressible fluids, one of which is whole blood, were used. The Mathcad 15.0 algebraic computing software package was used. Data correlation was evaluated using the corr functional using the Pearson correlation coefficient. The value of the correlation coefficient was interpreted using the Cheddock scale. The relationship between the results of ultrasound and angiographic data was also considered using the concepts of evidence-based medicine for diagnostic tests (sensitivity, specificity, predictive value and accuracy). RESULTS: Statistical indicators of the “discrepancy” of the data obtained from the above calculation formulas and clinical angiographic observations were: standard deviation SD 25.90%, maximum absolute deviation Δ 93.71% and reduced error δ 93.71%. The correlation of the average strength between the Doppler and the corresponding angiographic data was established (R = 0.467). The indicators of ultrasound tests generally correspond to angiographic data and are characterized on average by the following parameters: sensitivity Se = 100%, specificity Sp = 75.02, prognostic values PPV = 50.00%, NPV = 100% and overall accuracy P = 78.79%. CONCLUSIONS: It is concluded that the ultrasonographic duplex scanning data can be considered as satisfactorily determining the percentage of stenosis, which corresponds to the literature data on the ultimate sensitivity, specificity and prognostic value of detecting abdominal artery stenosis based on peak systolic velocity. At the same time, the given calculation formulas for the degree of stenosis, depending on the velocity parameters of blood flow, generally correctly reflect the degree of circulatory disorders in the abdominal trunk. Finally, the issue of the hemodynamic significance of disorders and the pathogenetic basis of the disease should be resolved on the basis of angiographic indicators.