Publication:

Comparison of saline instillation sonography with trans vaginal sonography in abnormal uterine bleeding: a prospective study

Background Abnormal vaginal bleeding may be caused by an extensive spectrum of disorders, both gynecologic and non-gynecologic. Diagnostic accuracy of abnormal uterine bleeding is important for the management.  Trans vaginal sonography (TVS) is one of the commonest investigation used for the diagnosis, but the diagnosis is not always accurate for all clinical conditions. Saline instillation sonography (SIS) has been shown to improve the diagnosis. Authors aimed to compare the TVS and SIS diagnosis with the final histopathological diagnosis.

Methods Seventy-five patients with the complained of abnormal uterine bleeding attending outpatient department of a tertiary care institute were enrolled for the study. Trans vaginal sonography (TVS) and saline instillation sonography (SIS) was done on outpatient basis. The diagnosis was compared with final histopathological diagnosis, in term of diagnostic accuracy, sensitivity, specificity, positive predictive value and negative predictive value.

Results Seventy-five patients who were enrolled for the study. Sixty-four patients underwent surgery and final histopathological diagnosis was established. Four patients SIS was not possible, data was analysed for sixty patients.

Conclusions In SIS abnormal uterus diagnosis confidence was significantly improved (p value 0.001) when compared to TVS. The diagnosis of submucous myoma significantly improved (p=0.015) by SIS when compared to TVS. There was no significant difference between TVS and SIS diagnosis of Myoma remote from the endometrium (p=0.522), Adenomyosis (p=1), Focal endometrial abnormality (p=0.654) and Diffuse endometrial abnormality (p=1). The SIS sensitivity, specificity, PPV and NPV were either improved or same, when compare to TVS for all the diagnosis except for the diagnosis of focal endometrial abnormality.