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ED endovaginal pelvic ultrasound in nonpregnant women with right lower quadrant pain.

INTRODUCTION: We hypothesized that emergency physician-performed endovaginal ultrasound (EVUS) would change diagnostic decision making in nonpregnant women with right lower quadrant (RLQ) pain.

METHODS: A prospective cohort of female patients was enrolled at an urban emergency department (ED). Inclusion criteria were RLQ pain, hemodynamic stability, and a strong suspicion for appendicitis or right adnexal pathology. Treating physicians were queried regarding pre- and post-ED EVUS probability of disease, differential diagnoses, consultation, and management. Positive findings included large cysts or multitissue densities, tubal dilation, uterine enlargement/mass, and extensive peritoneal fluid.

RESULTS: With a positive ED EVUS, mean physician probability increased for gynecologic (24%) and decreased for both surgical (14%) and medical (20%) disease. With a negative ED EVUS, mean physician probability increased for surgical disease (5.3%) and decreased for gynecologic disease (18.6%).

CONCLUSION: Emergency department EVUS changes physician diagnostic decision making in nonpregnant women with undifferentiated RLQ pain.

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