Abstract:

Objective To explore the diagnostic eff ect of gastrointestinal ultrasound contrast agents in the ultra-sound diagnosis of middle and lower common bile duct lesions. Method A retrospective analysis was conducted on the clinical data of 80 patients with suspected middle and lower common bile duct lesions admitted to Jilin Chemi-cal Industry Hospital from January 2021 to January 2024. All patients received simple ultrasound diagnosis and gas-trointestinal ultrasound assisted ultrasound diagnosis. The clinical comprehensive examination results and patholog-ical diagnosis results were used as the gold standard to compare the diagnostic results of diff erent methods. Result Among the 80 suspected patients with lesions in the middle and lower segments of the common bile duct, based on clinical comprehensive examination results and pathological diagnosis as the gold standard, there were 67 cases of lesions in the middle and lower segments of the common bile duct, including 40 cases of tumors in the middle and lower segments of the common bile duct, 19 cases of stones in the middle and lower segments of the common bile

duct, and 8 cases of tumors in the duodenal ampulla; 6 cases of intrahepatic bile duct stones; 3 cases of pancreatitis; 1 case of cholangiocarcinoma; Three cases of intrahepatic and extrahepatic bile duct dilation. Gastrointestinal ul-trasound contrast agents have a higher positive detection rate, sensitivity, accuracy, and disease diagnosis detection rate compared to simple ultrasound diagnosis, with signifi cant diff erences (P ＜ 0.05). Conclusion In the ultrasound diagnosis of middle and lower common bile duct lesions, the use of gastrointestinal ultrasound contrast agents can improve clinical diagnostic accuracy, clarify disease types, and provide accurate references for clinical practice.

Key words: Gastrointestinal ultrasound contrast agent, Ultrasonic diagnosis, Common bile duct, Middle and lower paragraphs, Diagnostic eff ect