| Duplex and color Doppler sonography of complications after percutaneous interventional vascular procedures. | |
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MedLine Citation:
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PMID: 8190950 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Duplex and color Doppler sonography have proved to be excellent noninvasive modalities for evaluating complications of percutaneous interventional vascular procedures. Complications including hematoma, pseudoaneurysm, arteriovenous fistula, thrombosis, stenosis, and vessel occlusion are routinely diagnosed with Doppler sonography. Hematomas exhibit variable echogenicity and internal complexity but never demonstrate internal blood flow. A pseudoaneurysm is a contained extravasation of blood that, unlike a hematoma, maintains a patent vascular connection with the injured vessel. Puncture-related arteriovenous fistulas are false vascular channels between an adjacent artery and vein that demonstrate low-resistance arterial signal, high-velocity venous outflow, and variable flow patterns within themselves. Narrowing in a stent demonstrates high-velocity turbulent flow with conventional Doppler and color aliasing with color Doppler techniques. Thrombus can be seen directly as a mural-based or luminal defect; however, it is often alterations in color flow dynamics, waveform characteristics, and flow velocities that permit conclusive diagnosis. Early experience in evaluation of stent stenosis in patients with transjugular intrahepatic portosystemic shunts suggests that low-velocity shunt flow indicates stenosis, likely related to the presence of low-resistance collateral pathways. Familiarity with both the interventional procedures and their possible complications facilitates prompt diagnosis and treatment. |
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Authors:
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M C Foshager; D E Finlay; D G Longley; J G Letourneau |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Radiographics : a review publication of the Radiological Society of North America, Inc Volume: 14 ISSN: 0271-5333 ISO Abbreviation: Radiographics Publication Date: 1994 Mar |
Date Detail:
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Created Date: 1994-06-23 Completed Date: 1994-06-23 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8302501 Medline TA: Radiographics Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 239-53 Citation Subset: IM |
Affiliation:
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Department of Radiology, University of Minnesota Hospital, Minneapolis 55455. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aneurysm
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ultrasonography Angioplasty, Balloon / adverse effects Arteriovenous Fistula / ultrasonography Hematoma / ultrasonography Humans Portasystemic Shunt, Surgical / adverse effects Punctures / adverse effects Stents / adverse effects Thrombosis / ultrasonography Vascular Diseases / etiology*, ultrasonography* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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