Fenestrated Stent-Graft Repair:Which Stent Should Be Used to Secure Target Vessel Fenestrations?
| Autor: | Thien How, J R H Scurr, G.L. Gilling-Smith, Steven Lane, Richard G. McWilliams |
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| Rok vydání: | 2008 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Awards and Prizes Target vessel Prosthesis Design Blood Vessel Prosthesis Implantation Renal Artery Foreign-Body Migration Blood vessel prosthesis medicine.artery medicine Humans Radiology Nuclear Medicine and imaging Renal artery Aorta Reduction (orthopedic surgery) business.industry Stent % area reduction Stent deformation equipment and supplies Blood Vessel Prosthesis Prosthesis Failure Surgery Equipment Failure Analysis surgical procedures operative Stents Stress Mechanical Cardiology and Cardiovascular Medicine Maximum displacement business |
| Zdroj: | Journal of Endovascular Therapy. 15:344-348 |
| ISSN: | 1545-1550 1526-6028 |
| Popis: | PURPOSE To investigate in an in vitro model the ability of different covered and uncovered stents to resist displacement/migration of a fenestrated stent-graft. METHODS Three different types (2 covered, 1 bare) of commonly used 7-mm balloon-expandable stainless steel stents (Jostent, Advanta V12, and Palmaz Genesis) were investigated in a testing rig consisting of 2 overlapping tubes with 2 sets of 7-mm holes representing bilateral renal artery fenestrations and ostia. The rig was attached to a tensile tester via pneumatic clamps. The stents were deployed without flaring to 7 mm through the overlapping holes. The rig was moved apart at a constant rate of 12 mm/min up to a maximum displacement of 6 mm; force versus displacement values were recorded while stent deformation was observed. Tests were repeated at least 6 times for each stent type at room temperature. The median force required to cause a 25%, 50%, or 75% reduction in cross-sectional area of the bilateral "renal artery" stents was determined. RESULTS The median force (interquartile range) required to cause a 50% reduction in cross-sectional area of identical bilateral "renal artery" stents securing fenestrations was 25.1 N (8.1) for a covered Jostent, 9.3 N (0.9) for a covered Advanta V12 stent, and 7.5 N (0.7) for a bare Palmaz Genesis stent. The differences were statistically significant (p |
| Databáze: | OpenAIRE |
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