Exclusion of lumbar arteries by aortic endovascular grafts: can angiography demonstrate sealing characteristics?

Détails

ID Serval
serval:BIB_74D5480F77CD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Exclusion of lumbar arteries by aortic endovascular grafts: can angiography demonstrate sealing characteristics?
Périodique
The Thoracic and cardiovascular surgeon
Auteur(s)
Marty B., von Segesser L.K., Ruchat P., Fischer S.
ISSN
0171-6425
Statut éditorial
Publié
Date de publication
1998
Peer-reviewed
Oui
Volume
46
Numéro
4
Pages
237-41
Langue
anglais
Notes
Publication types: Journal Article - Publication Status: ppublish
Résumé
BACKGROUND: This study evaluates sealing characteristics of two designs of endovascular grafts by angiographic demonstration of exclusion of porcine lumbar arteries. METHODS: 6 endovascular grafts (3 self-expandable with integrated polyurethane wall versus 3 nitinol structures covered with polyester fabric) were implanted in 6 porcine aortae. Perfusion of lumbar arteries was assessed by angiography after implantation and by angiography and dissection at graft explantation after 4 +/- 2 months. Tissue healing was evaluated by light and scanning electron microscopy. RESULTS: Immediate exclusion of the lumbar arteries was achieved in 14/31 vessels (12 by polyurethane grafts and 2 by polyester grafts, p < 0.001). Follow-up angiography and dissection at explantation revealed perfusion of 30/31 lumbar arteries with a collateral network in most cases. Another reason for reperfusion of initially excluded branches was distention of the polyurethane grafts with resulting shortening allowing reperfusion of 8 of the 31 originally covered branches. Histological examination revealed a complete neointimal lining and a tight contact between endovascular grafts and aorta. CONCLUSIONS: The immediate angiographic demonstration of exclusion of lumbar arteries predicts sealing characteristics of endovascular grafts. Later angiographic reappearance is due to development of a collateral network and possible shortening of self-expandable devices.
Mots-clé
Animals, Aortic Aneurysm, Abdominal, Aortography, Blood Vessel Prosthesis, Lumbar Vertebrae, Polyethylene Terephthalates, Polyurethanes, Prosthesis Design, Swine, Swine, Miniature
Pubmed
Web of science
Création de la notice
28/01/2008 10:39
Dernière modification de la notice
03/03/2018 18:22
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