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      Estudio experimental in vitro de la técnica del stent paralelo en la reparación endovascular de los aneurismas complejos de la aorta abdominal Translated title: Experimental in vitro study of parallel stent technique in endovascular repair of complex abdominal aortic aneurysms

      research-article
      Angiología
      Arán Ediciones S.L.
      Parallel stenting, Chimney, chEVAR, Sandwich, Oversizing, Stent paralelo, Chimenea, chEVAR, Sándwich, Sobredimensión

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          Abstract

          Resumen El objetivo de este estudio ha sido evaluar mediante modelos in vitro, dos configuraciones distintas de stent paralelo: en 2 y 3 chimeneas viscerales (chEVAR) y en configuración tipo sándwich para preservar la arteria hipogástrica y analizar cuál es la mejor combinación de materiales, el grado óptimo de sobredimensión y la mejor técnica de medición de esta última. Respecto a la configuración en 2-3 chimeneas, los resultados mostraron una mejor adaptación general de los componentes a sobredimensiones crecientes con una menor tasa de compresión en las combinaciones de alta fuerza radial aunque a expensas de un significativo peor sellado. Respecto a la configuración en sándwich, los resultados mostraron también una reducción de las zonas de mal sellado a mayor sobredimensión aunque a expensas de una mayor compresión y de un mayor replegado, sin diferencias significativas con los distintos dispositivos utilizados. Respecto a la medición de la sobredimensión, se obtuvo una correlación prácticamente perfecta entre la sobredimensión de áreas (clásicamente descrita) con la de perímetros y de diámetros. En conclusión, los resultados de este estudio in vitro pueden ser de utilidad en la planificación de procedimientos reales de EVAR con stent paralelo ante la ausencia de evidencia actual que soporte unas recomendaciones específicas.

          Translated abstract

          Abstract The aim of this study was evaluate using in vitro models, two different configurations of parallel stenting: 2 and 3 visceral chimneys (chEVAR) and in a sandwich configuration to preserve the hypogastric artery, analysing which is the best combination of materials, the optimal oversizing and the best measurement method. Regarding 2-3 chimney configuration, our results showed a better adaptation of the devices with increasing oversizing with a lower compression rate in high radial force combinations, although with a significantly worse sealing. Regarding sandwich configuration, our results also showed gutter area reduction when increasing oversizing although higher compression rate and inflodin, without significant differences between the devices used. Regarding oversizing measuring methods, a practically perfect correlation was obtained between area oversizing (classically described) and perimeter and diameter oversizing. In conclusion, the results of this in vitro study may be useful in planning real EVAR procedures with parallel stenting in the absence of current evidence to support specific recommendations.

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          Most cited references17

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          The PROTAGORAS study to evaluate the performance of the Endurant stent graft for patients with pararenal pathologic processes treated by the chimney/snorkel endovascular technique.

          The chimney/snorkel endovascular aortic repair (ch-EVAR) is gaining ever-greater acceptance in the treatment of pararenal pathologic processes. However, the published experience includes mainly short-term clinical results with combinations of several abdominal devices and types of chimney grafts. The aim of this study was the midterm evaluation of the Endurant stent graft (Medtronic, Santa Rosa, Calif) as a standard abdominal device for ch-EVAR.
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            The sandwich technique to treat complex aortoiliac or isolated iliac aneurysms: results of midterm follow-up.

            To ascertain midterm outcomes of the sandwich technique (ST) for internal iliac artery endorevascularization (ER). All consecutive patients with complex aortoiliac aneurysms, isolated common iliac artery aneurysms, and abdominal aortic aneurysms with bilateral short, nondiseased common iliac artery undergoing elective endovascular aneurysm repair (EVAR) with the ST at our center, between October 2008 and March 2011, were invited to participate in the present study. Patients were considered eligible for this procedure only when their aneurysm features did not fulfill the requirements for standard EVAR. Follow-up assessments were carried out at 1 month and every 6 months thereafter and included computed tomographic angiography or duplex ultrasound. The study was approved by the Institutional Review Board, and all patients gave written informed consent. A cohort of 40 patients (95% male; mean age, 72.2 years) was followed over a mean follow-up period of 12 ± 4.4 months (range: 6-30 months); 48 internal iliac artery (IIA) ER with ST were undertaken. Internal iliac artery aneurysm (IIAA) ER technical success rate was 100%. Primary patency rate was 93.8% on account of three IIA ER occlusions, occurring early in the study. Early and late related mortality rate was 0% and late unrelated mortality rate was 2.5%. Iliac aneurysm sac evolution demonstrated a significant (at least 5 mm) decrease in diameter in 16 (34.8%) common iliac artery aneurysms, no change in 29 (63%) common iliac artery aneurysms, and an increase in one patient (2.2%). Statistical significance was reached only for comparisons between baseline and 30 months (P = .039). Late buttock claudication rate was 0% after IIA ER with ST and 14.3% after IIA coil embolization. The ST expands the limits of EVAR for complex aortoiliac aneurysms or IIAA in a safe, easy to perform, and cost-effective manner. Copyright © 2013 Society for Vascular Surgery. Published by Mosby, Inc. All rights reserved.
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              Technical aspects, current indications, and results of chimney grafts for juxtarenal aortic aneurysms.

              Juxtarenal aortic aneurysms (JAA) can be successfully treated by fenestrated/branched endografts (FBE), but with significant cost and a long manufacturing process. "Chimney" grafts (CG) have been advocated as a cheaper and immediately available alternative. Because scant data are available, the aim of this study was to report our early experience with CG to treat JAA.
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                Author and article information

                Journal
                angiologia
                Angiología
                Angiología
                Arán Ediciones S.L. (Madrid, Madrid, Spain )
                0003-3170
                1695-2987
                October 2021
                : 73
                : 5
                : 228-238
                Affiliations
                [1] Barcelona orgnameUniversidad de Barcelona orgdiv1Hospital Clínic de Barcelona Spain
                Article
                S0003-31702021000500003 S0003-3170(21)07300500003
                10.20960/angiologia.00269
                ca3b58e1-c1e4-4800-a173-e9e38cd5cea4

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 11 January 2021
                : 13 July 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 17, Pages: 11
                Product

                SciELO Spain

                Categories
                Artículo Especial

                Sobredimensión,Sándwich,chEVAR,Chimenea,Stent paralelo,Oversizing,Sandwich,Chimney,Parallel stenting

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