Diagnostic Accuracy of Endovaginal Scan in Detection of Retained Products of Conception after Incomplete Abortion

Abstract

Background : To determine diagnostic accuracy of
Endo-vaginal Scan (EVS) in detection of retained
products of conception (RPOC) in patients with
incomplete abortion.
Methods: In this prospective study 200 pregnant
females, with gestational age <20 weeks and with
persistent vaginal bleeding, diagnosed clinically
with retained products of conception, were
included. Endo-vaginal ultrasound scan pelvis was
done in real time in axial and saggital planes.
Imaging of the examination was directed towards
evaluation of the uterus and any intrauterine
contents. Endometrial thickness of >12mm on EVS
was considered positive for diagnosis of RPOC
which was later on confirmed with
histopathology(HP) . Comparisons was then made
between EVS and HP findings.
Results: Mean age of selected patients was 30.8
years age ± 3.9 and mean gestational age 17.2 weeks
± 1.8 SD . Patients positive on EVS were 63.0% and
patients positive on HP were 72.5%. Sensitivity,
specificity, PPV, NPV and accuracy were found to be
71.7%, 60.0%, 82.5%, 44.6% and 68.5% respectively.
Conclusion: Endovaginal ultrasonography allows
detection of RPOC with reasonable accuracy.