Three-dimensional MR angiography of a nitinol-based abdominal aortic stent graft: assessment of heating and imaging characteristics

The stent-graft is a device constructed from a stent and vascular graft and is inserted by means of an interventional procedure under imaging guidance. In 1986, Balko et al.1 reported the first stentgraft experiment, in which a Z stent covered with polyurethane was inserted into an animal aorta. In the early 1990s, Parodi et al.2 reported clinical introduction of the stent-graft for abdominal aortic aneurysm. In comparison to the abdominal aortic stent-graft, the thoracic stent-graft has several disadvantages, including difficulties associated with the aortic arch curvature and the relatively large caliber of the stent-graft, and the risk of central nervous system or spinal complication. However, the thoracic stentgraft is advantageous because of minimal procedural invasiveness in comparison to surgical graft replacement. In 1994, Dake et al.3 reported transluminal placement of an endovascular stent-graft for thoracic aortic aneurysm, and Kato et al.4 reported use of a stent-graft for aortic dissection and suggested that the stent-graft could be considered an alternative to surgical treatment.

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Treatment of a Failed Bifurcated Abdominal Aortic Stent Graft with Thrombolysis and Wallstent Placement

Journal of Vascular and Interventional Radiology ◽

10.1016/s1051-0443(97)70662-6 ◽

1997 ◽

Vol 8 (5) ◽

pp. 795-798 ◽

Cited By ~ 15

Author(s):

Nikhil B. Amesur ◽

Albert B. Zajko ◽

Michel S. Makaroun

Keyword(s):

Stent Graft ◽

Aortic Stent Graft ◽

Abdominal Aortic

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Abdominal Aortic Stent Graft Mechanics: Sizing Them Up

Volume 1B: Extremity; Fluid Mechanics; Gait; Growth, Remodeling, and Repair; Heart Valves; Injury Biomechanics; Mechanotransduction and Sub-Cellular Biophysics; MultiScale Biotransport; Muscle, Tendon and Ligament; Musculoskeletal Devices; Multiscale Mechanics; Thermal Medicine; Ocular Biomechanics; Pediatric Hemodynamics; Pericellular Phenomena; Tissue Mechanics; Biotransport Design and Devices; Spine; Stent Device Hemodynamics; Vascular Solid Mechanics; Student Paper and Design Competitions ◽

10.1115/sbc2013-14523 ◽

2013 ◽

Author(s):

S. De Bock ◽

F. Iannaccone ◽

M. De Beule ◽

F. Vermassen ◽

P. Segers ◽

...

Keyword(s):

Stent Graft ◽

Structural Integrity ◽

Endovascular Aneurysm Repair ◽

Preventive Treatment ◽

Metallic Stent ◽

Aortic Stent Graft ◽

Abdominal Aortic ◽

Downward Displacement ◽

Aneurysm Repair

An abdominal aortic aneurysm (AAA) of the aorta is a local widening of the aorta in a region between the renal arteries and the aortic bifurcation. The disease impacts the structural integrity of the AAA wall, weakening the tissue and predisposing it to rupture. Preventive treatment of the disease is often performed minimally invasive with endovascular repair by stent graft deployment, as an alternative to open surgical repair. During endovascular aneurysm repair, a metallic stent, covered with a polymer membrane is first crimped and mounted onto the delivery system and inserted through the iliac artery. It is advanced to the AAA region, and expanded to cover the weakened, ballooning aorta. The technique has excellent clinical outcome, yet it is still associated with long term problems such as migration, a downward displacement of the device, and endoleakage, with blood reentering and pressurizing the aneurismal sack.

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Heparin-Induced Thrombocytopenia With Abdominal Aortic Stent-Graft Acute Thrombosis

Annals of Vascular Surgery ◽

10.1016/j.avsg.2012.07.027 ◽

2013 ◽

Vol 27 (6) ◽

pp. 801.e5-801.e7 ◽

Cited By ~ 3

Author(s):

Ludovic Canaud ◽

Kheira Hireche ◽

Charles Marty-Ané ◽

Pierre Alric

Keyword(s):

Stent Graft ◽

Heparin Induced Thrombocytopenia ◽

Acute Thrombosis ◽

Aortic Stent Graft ◽

Abdominal Aortic

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Migration versus Apparent Migration: Importance of Errors Due to Positioning Variation in Plain Radiographic Follow-up of Aortic Stent-Grafts

Journal of Endovascular Therapy ◽

10.1177/152660280301000509 ◽

2003 ◽

Vol 10 (5) ◽

pp. 902-910 ◽

Cited By ~ 11

Author(s):

Richard Hodgson ◽

Richard G. McWilliams ◽

Alistair Simpson ◽

Derek A. Gould ◽

John A. Brennan ◽

...

Keyword(s):

Stent Graft ◽

Abdominal Aortic Aneurysm Repair ◽

Geometric Distortion ◽

Aortic Stent Graft ◽

Abdominal Aortic ◽

Clinically Significant ◽

Aneurysm Repair ◽

Graft Migration ◽

Aortic Aneurysm Repair

Purpose: To demonstrate the influence of radiographic positioning on the assessment of stent-graft migration using plain radiographs following endovascular abdominal aortic aneurysm repair. Methods: Equations were derived to correct for artifactual stent-graft migration introduced by geometric distortion due to variations in positioning between radiographs acquired at different times. A phantom system was used to validate the equations. Results: Errors in stent position increase with (1) the distance of the aortic stent-graft from the midline and (2) differences in radiographic centering points in the craniocaudal direction; other variables have little effect. For typical stent positions, errors are small if the centering changes by <8 cm. Consistent radiographic positioning to within 4 cm on successive imaging studies limits errors to 1.5 mm. Even if artifactual migration is large, the true migration can be reliably calculated to within 2 mm. Conclusions: Artifactual migration due to variation in radiographic centering is not usually clinically significant if care is taken to center radiographs consistently. Radiographs in which artifactual migration may be important are readily identified, and mathematical correction is straightforward.

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