Fatigue-life assessment and validation techniques for metallic vascular implants

James, Brad; Sire, Robert A.

doi:10.1016/j.biomaterials.2009.10.028

Cited by 31 publications

(9 citation statements)

References 17 publications

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“…In fact, although the linear elastic fracture mechanics theory has proved its capability to reflect the main trends of crack propagation or the advanced part of damage, when dealing with small cracks (microcracks), fracture mechanics tools are inadequate. For stents, this inadequacy was confirmed by (James and Sire, 2010).…”

Section: Introductionsupporting

confidence: 50%

Fatigue life assessment of cardiovascular balloon-expandable stents: A two-scale plasticity–damage model approach

Santos¹,

Auricchio

Conti

2012

Journal of the Mechanical Behavior of Biomedical Materials

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Section: Introductionsupporting

confidence: 50%

Fatigue life assessment of cardiovascular balloon-expandable stents: A two-scale plasticity–damage model approach

Santos¹,

Auricchio

Conti

2012

Journal of the Mechanical Behavior of Biomedical Materials

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“…Metal fatigue and material deterioration are known complications of stent-grafting, 18 and it has been hypothesized that custom-modified stent-grafts in the arch may be particularly vulnerable due to the asymmetric force distribution. 19,20 This study demonstrates that these PMEGs continue to perform well at least in the midterm; no cases of stent fracture have been detected in follow-up.…”

Section: Discussionmentioning

confidence: 56%

Midterm Follow-up of Fenestrated and Scalloped Physician-Modified Endovascular Grafts for Zone 2 TEVAR

Chassin-Trubert

Mandelli²,

Ozdemir

et al. 2019

J Endovasc Ther

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Purpose: To investigate the midterm outcomes of scalloped or fenestrated physician-modified endovascular grafts (PMEGs) for zone 2 thoracic endovascular aortic repairs (TEVAR). Materials and Methods: Between November 2013 and May 2019, 54 consecutive patients (mean age 63 years; 41 men) were treated with thoracic PMEGs modified with 7 scallops or 47 fenestrations for the left subclavian artery (LSA). Indications for aortic repair were acute complicated type B aortic dissection (17, 31%), degenerative aneurysm (13, 24%), acute traumatic rupture of the aortic isthmus (9, 16%), post chronic dissection aneurysmal evolution (8, 15%), penetrating aortic ulcer (3, 6%), intramural hematoma (2, 4%), and floating thrombus (2, 4%). Results: Technical success was 94%; 3 (6%) LSAs were unintentionally covered. An intraoperative type Ia endoleak was treated during the index procedure. One (2%) patient suffered spinal cord ischemia, with irreversible bilateral paraplegia. Three (6%) patients experience postoperative minor strokes with full neurological recovery. Four (7%) patients died in the perioperative period; 2 (2%) were due to aneurysm rupture. Mean follow-up was 26±16 months; 15 (28%) patients had at least 3 years of follow-up. Two (4%) type II endoleaks were identified and successfully treated (4% reintervention rate); no other endoleaks were identified. All the LSAs remained clinically and radiologically patent. There were no conversions to open repair, ruptures, retrograde dissection, stent fracture, migrations, or other aortic complications. Conclusion: Scalloped or single-fenestrated PMEGs for the LSA appear to be durable and safe in the midterm. Combined with low periprocedural morbidity and mortality, these results suggest that this approach can be considered as an off-label alternative to extend proximal seal to zone 2 for TEVAR. Further studies with a larger number of patients and long-term outcomes are needed to fully validate this approach.

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“…Intravascular stent grafts are engineered to withstand pulsatile flow stress and to maintain structural integrity while subject to the extrinsic forces of the vessel wall. 16,17 What effect noncustom designs will have on device integrity is unknown. However, we can hypothesize that such configurations may lead to asymmetric force distribution, potentially contributing to fractures and stent failure.…”

Section: Discussionmentioning

confidence: 99%

Outcomes for supra-aortic branch vessel stenting in the treatment of thoracic aortic disease

O’Callaghan

Mastracci

Greenberg

et al. 2014

Journal of Vascular Surgery

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Fatigue-life assessment and validation techniques for metallic vascular implants

Cited by 31 publications

References 17 publications

Fatigue life assessment of cardiovascular balloon-expandable stents: A two-scale plasticity–damage model approach

Fatigue life assessment of cardiovascular balloon-expandable stents: A two-scale plasticity–damage model approach

Midterm Follow-up of Fenestrated and Scalloped Physician-Modified Endovascular Grafts for Zone 2 TEVAR

Outcomes for supra-aortic branch vessel stenting in the treatment of thoracic aortic disease

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