The prospective study of serial transvaginal sonography for early diagnosis of ectopic pregnancy

Objective To study prospectively serial transvaginal sonography for early diagnosis of ectopic pregnancy through examining the patients with clinically suspected diagnosis of ectopic pregnancy. Methods Using HP Image Point Ultrasound System with probe frequency at 7.5 MHz, the patients underwent repeated examinations. The accuracy of diagnosis from a single exarmination was compared with that from multiple examinations according to the standards for diagnosis of ectopic pregnancy by transvaginal ultrasound and relating the findings from operations. Results Among all 155 cases undergoing multiple transvaginal ultrasound examinations, 80 cases were ectopic pregnancy (51.6%),75 cases were intrauterine pregnancy (48.4%).The accuracy of diagnosis of ectopic pregnancy was 82.5% at the first examination, 94.0% at the second time and 100% at the third was 1 3% Conclusions Transvaginal Ultrasound is superior to transabdominal sonography at the aspcct of early diagnosis in intrauterine and ectopic pregnancy. Serial transvaginal ultrasound demonstration can more greatly improve the accuracy of diagnosis of ectopic pregnancy than a single examination and can reduce the rate of false-positive.