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Aneurysm III: Interprofessional Care01:26

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Related Experiment Video

Updated: Mar 30, 2026

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Imaging After Nellix Endovascular Aneurysm Sealing: A Consensus Document.

Andrew Holden1, Janis Savlovskis2, Andrew Winterbottom3

  • 1Department of Interventional Radiology, Auckland Hospital, Auckland, New Zealand andrewh@adhb.govt.nz.

Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists
|November 14, 2015
PubMed
Summary

Imaging after endovascular aneurysm sealing (EVAS) with the Nellix system shows unique changes over time. Understanding these normal and abnormal findings is crucial for monitoring abdominal aortic aneurysm repair outcomes.

Keywords:
aortic aneurysmcomplicationscomputed tomographyduplex ultrasoundendobagendoleakendovascular aneurysm sealingimaging

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Area of Science:

  • Vascular Surgery
  • Medical Imaging
  • Endovascular Interventions

Background:

  • Endovascular Aneurysm Sealing (EVAS) using the Nellix system offers a novel approach to abdominal aortic aneurysm (AAA) repair.
  • Postoperative imaging surveillance is essential for monitoring EVAS outcomes and detecting potential complications.

Purpose of the Study:

  • To describe the characteristic imaging findings following Nellix EVAS.
  • To provide a consensus on the interpretation of normal and abnormal imaging appearances.
  • To aid in the early detection of complications after Nellix EVAS.

Main Methods:

  • Consensus document based on collective experience from the Nellix EVAS Global Forward Registry and US IDE Trial.
  • Review of imaging findings across multiple modalities: CT, duplex ultrasound, MRI, and plain radiography.
  • Description of temporal changes in endobag appearance and identification of specific complication patterns.

Main Results:

  • Normal postoperative imaging demonstrates predictable changes, particularly CT findings related to contrast migration and air within endobags.
  • Type I endoleaks appear as flow between the endobag and aortic wall; Type II endoleaks are smaller, often near branch arteries.
  • Procedural aortic injury, though uncommon, is associated with endobag overfilling.

Conclusions:

  • Standardized imaging interpretation is vital for successful Nellix EVAS surveillance.
  • CT remains a primary surveillance tool, especially in the first year postprocedure.
  • Duplex ultrasound shows promise as a sensitive method for identifying normal findings and complications.