Use of transvaginal color Doppler ultrasound to diagnose vasa previa.

Vasa previa, though rare (1 in 3000 births), has a significantly high mortality rate. Diagnosis is usually difficult, especially during the antenatal period. However, the use of transvaginal color Doppler ultrasound has increased the recognition of this condition during the antenatal period. Transvaginal color Doppler ultrasound is a more accurate way to view the vulnerable vessels in the area of question. This diagnostic tool will assist in the management of the patient to prevent possible disaster. In this report, transvaginal color Doppler ultrasound helped to recognize and follow up a patient with vasa previa to ensure a successful outcome for both the mother and the fetus. As the antenatal diagnosis of the condition increases with the use of transvaginal color Doppler ultrasound, the high mortality rate should decrease. The importance of meticulous evaluation of the placenta during routine obstetric ultrasound scanning is emphasized.