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Updated: Mar 15, 2026

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm
Published on: August 1, 2025
[Thoracic Endovascular Aortic Repair Via Internal Iliac Artery Conduit]
Taro Hayashi1, Satoshi Tobe, Hironobu Sugiyama
1Department of Cardiovascular Surgery, Akashi Medical Center, Akashi, Japan.
Insights
Thoracic endovascular aortic repair (TEVAR) was challenging due to prior stent issues. A retrograde approach via the left internal iliac artery (IIA) provided a viable access route for this complex aortic aneurysm repair.
Area of Science:
- Vascular Surgery
- Endovascular Interventions
- Aortic Aneurysm Repair
Background:
- A 77-year-old male patient presented with a rapidly growing descending thoracic aortic aneurysm.
- The patient had a history of stent implantation in the right common iliac artery (CIA) and left external iliac artery (EIA).
Observation:
- Significant challenges were identified for standard endovascular access.
- These included severe calcification in the infrarenal aorta and left EIA, small stent lumens (right CIA: 5.3 mm, left EIA: 4.3 mm), and a short left CIA (13 mm).
Findings:
- Thoracic endovascular aortic repair (TEVAR) was successfully performed using a retrograde access approach.
- The access route utilized was the left internal iliac artery (IIA) with a tube graft conduit in a hybrid operating room.
Implications:
- The left internal iliac artery (IIA) serves as a valuable alternative access route for endovascular aortic repair.
- This approach can overcome limitations posed by previous interventions and complex iliac-artery anatomy.
Abstract:
A 77-year-old man with a history of stent implantation in the right common iliac artery(CIA) and the left external iliac artery(EIA) was admitted to our hospital for a rapid growth of an aneurysm( max 53 mm) at Th11 level of the descending aorta. Although thoracic endovascular aortic repair (TEVAR) was required, there were many problems about access rout. The infrarenal abdominal aorta and the left EIA were severely calcified, and the lumens of the right CIA stent(5.3 mm) and the left EIA stent( 4.3 mm) were small in size. Besides, the left CIA was short(13 mm). Therefore, TEVAR was performed by retrograde approach from the left internal iliac artery( IIA) with a tube graft conduit in the hybrid operation room. IIA is a useful option for an access rout in endovascular aortic repair.
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