Abstract: Objective To explore the value of intraoperative ultrasound for patients with hepatic tumor resection.Methods Patients with liver tumors were enrolled from the hepatic surgery department of our hospital.Preoperative ultrasonography (POUS), CT, and intraoperative ultrasonography (IOUS) were performed on the patients respectively.According to the postoperative pathological biopsy, the detection rates of liver tumors in different diameter ranges were compared among the three groups, and the χ² test was performed to screen out the examination with the highest specificity for liver tumor.Results The detection rate of liver tumors by intraoperative ultrasound was 98.7%, significantly higher than the rates by preoperative ultrasound (80.2%) and preoperative CT examination (87.7%).At the same time, the sensitivity of intraoperative ultrasound examination for small lesions was higher than the other two, with significant differences (P<0.05).Conclusion Intraoperative ultrasonography can supplement preoperative information, improve the detection rate of tumors, reduce the recurrence rate of liver tumors, and improve the prognosis of patients with liver tumor resection.

Key words: Intraoperative ultrasound, Liver tumor, Detection rate