Abstract: Objective To investigate the comparison of vaginal and abdominal B ultrasound examination in the diagnosis of uterine scar pregnancy.Methods From July, 2012 to July, 2014 83 patients with uterine scar pregnancy were conducted with vaginal and abdominal B ultrasound examination. The misdiagnosis rate of two kinds of examination methods were compared to observe the ultrasonographic manifestations of patients with different types of uterine scar pregnancy. Results Off 77 cases diagnosed with vaginal B ultrasound, 6 cases were misdiagnosed, the diagnosis rate was 92.77%, among 66 cases diagnosed with abdominal B ultrasound, 17 cases were misdiagnosed, the diagnosis rate was 79.52. Comparied the two inspection diagnosis rate, the difference was statistically significant (P<0.05). 6 cases were misdiagnosed with vaginal B ultrasound, they were misdiagnosed as corpus luteum rupture in 4 cases and inflammatory mass hemorrhage in 2 cases. 17 cases were misdiagnosed with abdominal B ultrasound examination, of them, 9 cases were misdiagnosed as rudimentary uterine horn pregnancy, 3 cases as corpus luteum rupture hemorrhage, 5 cases as inflammatory mass. Conclusion Using transvaginal B ultrasound for uterine scar has higher rate of diagnosis with abdominal B ultrasound. Transvaginal B ultrasound combined with abdominal B ultrasound examination are performed to analyze the results of ultrasonic image, meanwhile the changes of HCG in the blood are taken into consideration to improve the diagnosis rate of uterine scar pregnancy and the detection rate.

Key words: vaginal B ultrasound, abdominal B ultrasound, uterine scar, pregnancy