Clinical effect of low frequency ultrasound combined with high frequency ultrasound in the diagnosis of gallbladder polypoid lesions

Objective To explore the clinical effect of low frequency ultrasound combined with high frequency ultrasound in the diagnosis of polypoid lesions of gallbladder, and to provide reference for clinical diagnosis. Methods From January 2013 to January 2017, 87 patients with gallbladder polypoid lesions in Hankou Hospital were selected as the subjects, all the patients were checked by low frequency ultrasound and high frequency ultrasound, the results were compared with postoperative pathological findings.The diagnostic effect were compared between the low frequency ultrasound and low frequency ultrasound combined with high frequency ultrasound, and the consistency between the two inspection methods and postoperative pathological results was analyzed. Results The postoperative pathological report showed that among the 87 patients, 59 cases (67.82%) had gallbladder polyp, 6 cases (6.90%) had adenomyosis, 10 cases (11.49%)had gallbladder adenoma, 12 (13.79%) had small nodular gallbladder cancer, 65 (86.67%) had benign polypoid lesions, 73 (97.33%) had low frequency ultrasound combined with high frequency ultrasound.The accuracy of combined high-frequency ultrasound in the diagnosis of benign gallbladder polypoid lesions was significantly higher than that of low frequency ultrasound (χ2=5.797, P<0.05); the specificity and positive predictive value of combined low frequency ultrasound and high frequency ultrasound in the diagnosis of benign gallbladder polypoid lesions were significantly higher than those of low frequency ultrasound(90.00% and 41.18%, 97.33% and 86.67%). The difference was statistically significant (χ2=6.217, 5.797, P=0.013, 0.016). Conclusion Compared with low frequency ultrasound, low frequency ultrasound combined with high frequency ultrasound improves the differential diagnosis effect of gallbladder polypoid lesions, which is worthy of clinical attention. Key words: Polypoid lesions of gallbladder; Low frequency ultrasound; High frequency ultrasound