Evaluation of Wall Shear Stress and Turbulence Characteristics of the Superior Mesenteric Artery in Children with Acute Gastroenteritis by Ultrasound Vector Flow Imaging

Purpose: To assess the diagnostic value of ultrasound vector flow imaging in children with acute gastroenteritis. Materials and Methods: Pediatric patients diagnosed with acute gastroenteritis at our hospital were recruited. US examinations were carried out using a Recho R9S system. Ultrasound vector flow imaging was utilized to measure the wall shear stress (WSS) and turbulence (Tur) index in the superior mesenteric artery (SMA). A control group of healthy children was established for comparison. Receiver operating characteristic (ROC) curves were constructed to determine the critical values of WSS for predicting acute gastroenteritis. Results: The Tur values, mean WSS, and max WSS values in the disease group were significantly higher than those in the healthy group. ROC analysis indicated that the area under the curve (AUC) reached its maximum when the cutoff values for mean WSS and max WSS were 0.43 Pa and 2.41 Pa, respectively. Among these, the mean WSS exhibited the highest sensitivity and specificity, at 79.6% and 77.4%, respectively. Conclusion: Ultrasound vector flow imaging offers an objective, quantitative, noninvasive, and well-tolerated diagnostic indicator with high clinical value for children with acute gastroenteritis, thus justifying its wider application in clinical practice. Key Points: · V Flow was first applied to assess the SMA in children with AG.. · In the AG group, both the WSS and Tur intensity were increased.. · The mean WSS exhibited the highest sensitivity and specificity.. · V flow provides valuable guidance for the clinical diagnosis of diseases.. Citation Format: · Zheng R, Lu H, Li Y et al. Evaluation of Wall Shear Stress and Turbulence Characteristics of the Superior Mesenteric Artery in Children with Acute Gastroenteritis by Ultrasound Vector Flow Imaging. Rofo 2026; DOI 10.1055/a-2807-1797.