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Related Experiment Video

Updated: Feb 1, 2026

Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture
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Nellix Endobag rupture associated with a fatal outcome.

Stuart R Walker1, Emma Sim2, Jens J Froelich3

  • 1Clinical School, University of Tasmania, Hobart, Tasmania, Australia; Department of Vascular and Endovascular Surgery, Royal Hobart Hospital, Hobart, Tasmania, Australia.

Journal of Vascular Surgery
|December 1, 2018
PubMed
Summary

A Nellix endovascular repair for abdominal aortic aneurysm led to a fatal polymer leak from an endobag. This case highlights potential complications of chimney graft techniques in complex aortic aneurysm treatment.

Keywords:
EVASEndoleakEndovascular aneurysm sealing

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Area of Science:

  • Vascular Surgery
  • Endovascular Interventions
  • Aortic Aneurysm Repair

Background:

  • Abdominal aortic aneurysms (AAAs) pose significant risks, necessitating effective treatment strategies.
  • Endovascular aneurysm repair (EVAR) is a common minimally invasive approach for AAA management.
  • Chimney graft techniques are utilized for complex AAA anatomies, including endoleaks.

Observation:

  • An 84-year-old male patient underwent endovascular treatment for an expanding AAA with a type IA endoleak.
  • A Nellix stent graft system with a chimney technique was employed for the repair.
  • A polymer leak from an endobag occurred during the endovascular procedure.

Findings:

  • The patient experienced postoperative hemodynamic instability following the endovascular repair.
  • Development of a swollen leg on the side of the leaking endobag was noted.
  • The complication resulted in a fatal outcome for the patient.

Implications:

  • This case underscores the critical risks associated with endobag integrity in Nellix EVAR.
  • Careful patient selection and meticulous technique are paramount when using chimney grafts for complex AAAs.
  • Further research into mitigating polymer leak complications in endovascular aortic repair is warranted.