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Titolo:
Polyethylene terephthalate and polyurethane coatings for endovascular stents: Preliminary results in canine experimental arteriovenous fistulas
Autore:
Schellhammer, F; Walter, M; Berlis, A; Bloss, HG; Wellens, E; Schumacher, M;
Indirizzi:
Univ Cologne, Dept Radiol, D-50931 Cologne, Germany Univ Cologne CologneGermany D-50931 pt Radiol, D-50931 Cologne, Germany Univ Freiburg, Dept Neuroradiol, D-7800 Freiburg, Germany Univ Freiburg Freiburg Germany D-7800 roradiol, D-7800 Freiburg, Germany Univ Freiburg, Dept Neurosurg, D-7800 Freiburg, Germany Univ Freiburg Freiburg Germany D-7800 eurosurg, D-7800 Freiburg, Germany Univ Freiburg, Dept Pathol, D-7800 Freiburg, Germany Univ Freiburg Freiburg Germany D-7800 t Pathol, D-7800 Freiburg, Germany Univ Bonn, Dept Radiol, D-5300 Bonn, Germany Univ Bonn Bonn Germany D-5300 iv Bonn, Dept Radiol, D-5300 Bonn, Germany
Titolo Testata:
RADIOLOGY
fascicolo: 1, volume: 211, anno: 1999,
pagine: 169 - 175
SICI:
0033-8419(199904)211:1<169:PTAPCF>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
PORCINE CORONARY-ARTERIES; CAROTID ANEURYSMS; AORTIC-ANEURYSMS; METALLIC STENTS; ILIAC ARTERY; GRAFTS; DACRON; BIOCOMPATIBILITY; IMPLANTATION; PLACEMENT;
Keywords:
animals; arteriovenous malformations; carotid arteries, interventional procedure; fistula, arteriovenous; stents and prostheses;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Schellhammer, F Univ Cologne, Dept Radiol, Joseph Stelzmann Str 9, D-50931Cologne, Germany Univ Cologne Joseph Stelzmann Str 9 Cologne Germany D-50931
Citazione:
F. Schellhammer et al., "Polyethylene terephthalate and polyurethane coatings for endovascular stents: Preliminary results in canine experimental arteriovenous fistulas", RADIOLOGY, 211(1), 1999, pp. 169-175

Abstract

PURPOSE: To evaluate polyethylene terephthalate and polyurethane as coatings of vascular endoprostheses in the treatment of experimental arteriovenous fistulas (AVFs). MATERIALS AND METHODS: Nineteen bilateral carotid artery-to-external jugular vein AVFs were created in 10 adult dogs. Fourteen polyethylene terephthalate-coated and five polyurethane-coated self-expandable nitinol stents were placed with a transfemoral approach. Angiography was performed immediately after placement, after 1 and 3 weeks, and at months 3, 6, 9, and 12. All grafts were examined histopathologically. RESULTS: The AVF was successfully occluded with all but one of the polyethylene terephthalate-coated stents. Craft patency was seen with 12 polyethylene terephthalate-coated stents, while acute vessel occlusion was evident with two polyethylene terephthalate-coated stents following percutaneous transluminal angioplasty immediately after implantation. In the group with polyurethane-coated stents, three graft dislocations and two delayed vessel occlusions were observed. In both groups, histologic examination disclosed a mild foreign body reaction with a few macrophages. No inflammatory reactions were seen. An unorganized fibrin layer was found adjacent to the polyurethane coating. CONCLUSION: Polyethylene terephthalate-coated nitinol stents showed good biocompatibility and a high rate of occlusion of experimental AVFs. The mechanical properties of the polyethylene terephthalate coating were similar tothose of the nitinol stents, which facilitated handling. Polyurethane-coated stents showed frequent dislocation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/01/21 alle ore 03:22:41