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Obstetric Iatrogenic Arterial Injuries of the Uterus: Diagnosis with US and Treatment with Transcatheter Arterial Embolization¹

¹ From the Department of Diagnostic Radiology, Dongkang General Hospital, 123-3 Taehwa-dong, Ulsan 681-320, Korea. Presented as an education exhibit at the 2000 RSNA scientific assembly. Received April 19, 2001; revision requested May 31 and received July 20; accepted July 23. Address correspondence to J.H.K. (e-mail: KJH2603@chollian.net).

Uterine curettage or surgical trauma can cause uterine vascular abnormalities, including pseudoaneurysms, acquired arteriovenous malformations (AVMs), arteriovenous fistulas, and rupture of vessels. Recognition of these abnormalities as the cause of hemorrhage is important, since these abnormalities can be treated safely and effectively with transcatheter arterial embolization but may be worsened by uterine curettage, precipitating massive uterine bleeding. Ultrasonography (US) is the most commonly performed initial imaging examination for evaluation of abnormal uterine bleeding. Color and duplex Doppler US allows convincing detection and diagnosis of these vascular abnormalities and helps differentiate vascular abnormalities that require embolization from nonvascular abnormalities. In cases of pseudoaneurysms, color and duplex Doppler US shows a blood-filled cystic structure with swirling arterial flow. In cases of AVMs, color Doppler US shows an intense vascular tangle, whereas duplex Doppler US shows low-resistance, high-velocity arterial flow. Cases of an AVM combined with a pseudoaneurysm demonstrate the findings of both AVMs and pseudoaneurysms. Transcatheter arterial embolization after angiography is the therapy of choice for these vascular abnormalities, with the advantage of retained reproductive capacity. Routine use of color and duplex Doppler US during examination of abnormal uterine bleeding is recommended to identify and characterize the vascular abnormality.

© RSNA, 2002

Index Terms: Aneurysm, uterine, 969.458, 969.732 • Arteries, therapeutic embolization, 969.1264 • Arteries, uterine, 969.412, 969.458 • Arteriovenous malformations, uterine, 969.494

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