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A new technique is described which utilizes ultrasound to diminish fetal exposure to x ray during intrauterine transfusion. In replacing x ray imagery, ultrasound better localizes the exact position of the intrauterine contents, including the vital fetal intraabdominal structures. Using an A mode needle aspiration transducer, it is possible to guide the tip of the transfusing needle into the center of the fetal intraperitoneal cavity.
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Hobbins et al. (1976) studied this question.
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