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Case Reports in Medicine
Volume 2012, Article ID 242101, 7 pages
Case Report

Treatment of Endovascular Coil and Stent Migration Using the Merci Retriever: Report of Three Cases

1Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
2Department of Neurological Surgery, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA
3Division of Interventional Neuroradiology, Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA

Received 18 December 2011; Accepted 17 March 2012

Academic Editor: Mohamud Daya

Copyright © 2012 David K. Kung et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. Coil and stent migration is a potentially catastrophic complication in endovascular neurosurgery, which may lead to cerebral thromboembolism. Techniques for removing migrated coil and stent are not well established. Methods and Results. We present three cases in which coil or stent migration occurred during endovascular embolization of a cerebral aneurysm. The Merci Retrievers were used successfully in all cases to remove the displaced foreign bodies. Technical details are described. Conclusion. The Merci Retriever device can be utilized successfully for removal of migrated coils and stents in endovascular neurosurgery.