Real-time ultrasound as an aid in intrauterine transfusion.

Real-time ultrasound was used as an aid in intrauterine transfusions for patients with Rh isoimmunization. It was preferred to fluoroscopy and x-ray control to identify the placental site and fetal abdomen and to direct the insertion and placement of the transfusion needle. The technique was used 22 times in 12 patients and resulted in increased efficiency and safety, including decreased radiation to the fetus.