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Related Experiment Video

Updated: Jun 26, 2026

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm
04:56

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm

Published on: August 1, 2025

Thoracic Endovascular Repair for Retrograde Type A Aortic Dissection: True Lumen Device Sizing.

Ryo Onishi1, Takeshi Okamoto1, Atsuki Shimada1

  • 1Division of Thoracic and Cardiovascular Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata City, Niigata, 951-8510, Japan.

Annals of Vascular Surgery
|June 24, 2026
PubMed
Summary

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Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...

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Optimal device sizing for thoracic endovascular aortic repair (TEVAR) in retrograde type A aortic dissection is crucial. True lumen morphology significantly impacts device selection, with the major axis being a better predictor in elliptical lumens.

Area of Science:

  • Cardiovascular Surgery
  • Interventional Cardiology
  • Medical Imaging

Background:

  • Retrograde type A aortic dissection presents challenges for thoracic endovascular aortic repair (TEVAR) due to compressed, elliptical proximal landing zone true lumens.
  • Accurate device sizing is critical for successful TEVAR outcomes.

Purpose of the Study:

  • To evaluate clinical outcomes of TEVAR in retrograde type A aortic dissection.
  • To investigate the influence of true lumen morphology on device selection.

Main Methods:

  • Retrospective analysis of 34 patients undergoing TEVAR for retrograde type A aortic dissection (October 2012 - December 2022).
  • Exclusion of patients with major cardiac or neurological complications.
  • Preoperative CT assessment of proximal landing zone true lumen morphology and its relationship to device sizing.

Related Experiment Videos

Last Updated: Jun 26, 2026

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm
04:56

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm

Published on: August 1, 2025

Main Results:

  • Mean patient age was 62.7 years; 61.8% underwent emergency TEVAR.
  • Low complication rates: one spinal cord infarction, no cerebral infarctions.
  • 88% showed ascending aortic false lumen disappearance during follow-up.
  • Elliptical true lumens were common; major axis diameter correlated better with device size than area-derived diameter.

Conclusions:

  • TEVAR is a feasible treatment for selected retrograde type A aortic dissection patients with acceptable outcomes.
  • Precise preoperative anatomical assessment, particularly true lumen morphology, is vital for optimal device selection and complication prevention.