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Titolo:
Time-related alterations in shape, position, and structure of self-expanding, modular aortic stent-grafts: A 4-year single-center follow-up
Autore:
Umscheid, T; Stelter, WJ;
Indirizzi:
Stadt Kliniken, Dept Surg, D-65929 Frankfurt, Germany Stadt Kliniken Frankfurt Germany D-65929 urg, D-65929 Frankfurt, Germany
Titolo Testata:
JOURNAL OF ENDOVASCULAR SURGERY
fascicolo: 1, volume: 6, anno: 1999,
pagine: 17 - 32
SICI:
1074-6218(199902)6:1<17:TAISPA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENDOVASCULAR REPAIR; 3-YEAR EXPERIENCE; ANEURYSMS; ENDOGRAFTS; PROSTHESES; PERFUSION; SYSTEM;
Keywords:
abdominal aortic aneurysms; endoleak; endovascular grafts; Stentor; Vanguard; migration; tortuosity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Umscheid, T Stadt Kliniken, Dept Surg, Gotenstr 6-8, D-65929 Frankfurt, Germany Stadt Kliniken Gotenstr 6-8 Frankfurt Germany D-65929 Germany
Citazione:
T. Umscheid e W.J. Stelter, "Time-related alterations in shape, position, and structure of self-expanding, modular aortic stent-grafts: A 4-year single-center follow-up", J ENDOVAS S, 6(1), 1999, pp. 17-32

Abstract

Purpose: To report the nature and ramifications of structural and positional changes over time in tube and modular bifurcated aortic stent-grafts. Methods: Two hundred ninety-one patients received endovascular aortic grafts (primarily Stentor/Vanguard) between August 1994 and August 1998. Follow-up surveillance (clinical and laboratory examination, biplanar noncontrastradiography, and contrast-enhanced computed tomography) has been maintained on all patients for 4 years. Changes in the configuration and position ofendografts have been noted and their sequelae charted. Results: Three types of endograft shape changes have been documented: mild- slight distortions visible on plain radiographs (n = 90, 31.0%), significant - angulations reaching 60 degrees to 90 degrees (n = 65, 22.3%), and severe - angulations greater than or equal to 90 degrees (n = 10, 3.4%). Changes in position never gave rise to late migration at the proximal attachment site, whereas at the distal ends, the en dog raft easily retracted from the iliac arteries (n = 8). Structural alterations (rupture of the stent frame, sutures, or fabric, and total graft disintegration) were more common in the original Stenter model. Shape, position, and structural alterations were mutually dependent and led to secondary endoleaks (n = 26) and graft limb thrombosis (n = 37). Late surgical conversion was necessary in 3 (1.0%) patients. Conclusions: Tortuosity of the native vessels is a source of complication in long-term follow-up just as it is during implantation. Given the late appearance of complications in this patient cohort, it would seem th at the durability of an endograft cannot be evaluated with < 3 years of follow-up.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 19:11:59