Abstract
Objectives: To investigate the intraluminal and extraluminal healing behaviour of a new metallic
silver coated, gelatine impregnated vascular graft. Design: Comparative animal experimental investigation with randomisation of the animals to
control and experimental groups. Material and Methods: 24 pigs were assigned to two control and two experimental groups. The prostheses
were interposed in the pigs' infrarenal aorta. For the evaluation, macroscopic, histological
and immunohistochemical criteria were applied. Results: The macroscopic evaluation after explantation of the prosthesis revealed similar
healing characteristics in the control and experimental groups. The microscopic determination
of neo-intimal thickness showed no significant differences between the groups; nor
did the immunohistochemical investigations show any significant difference between
the control group and the silver-coated prosthesis group. Conclusions: No disadvantage of the silver coating in terms of healing and graft patency was found.
A possible advantage in terms of the antibacterial effect of the silver coating must
be investigated in the clinical setting.
Zusammenfassung
Hintergrund: Untersuchung der intra- und extraluminalen Einheilung einer neuen metallisch Silber-beschichteten,
Gelatine-imprägnierten Gefäßprothese. Design: Vergleichende tierexperimentelle Untersuchung mit Randomisierung in Kontroll- und
Versuchsgruppen. Material und Methode: 24 Schweine wurden in 2 Kontroll- und 2 Versuchsgruppen randomisiert. Die Gefäßprothesen
wurden in die infrarenale Aorta interponiert. Zur Auswertung wurden makroskopische,
histologische und immunhistochemische Kriterien verwendet. Ergebnisse: Die makroskopische Beurteilung stellte nach Prothesenexplantation ein vergleichbares
Einheilungsverhalten von Kontroll- und Versuchsgruppen dar. Die mikroskopische Neointimadickenbestimmung
zeigte keine signifikanten Unterschiede zwischen den Gruppen. In den immunhistochemischen
Untersuchungen waren ebenfalls keine signifikanten Unterschiede zwischen der Kontrollgruppe
und den silberbeschichteten Gefäßprothesen nachweisbar. Schlussfolgerungen: Ein Nachteil durch die Silberbeschichtung in Bezug auf Einheilung und Offenheit konnte
nicht nachgewiesen werden. Ein möglicher Vorteil durch die antibakterielle Wirkung
der Silberbeschichtung muss in der klinischen Anwendung untersucht werden.
Key words
Metallic silver-coated vascular prostheses - polyester vascular prostheses - healing
characteristics
Schlüsselwörter
Silberbeschichtete Gefäßprothese - Polyestergefäßprothese - Einheilungsverhalten
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Torsten Ueberrueck
Friedrich-Schiller University · Department of Cardiothoracic and Vascular Surgery
Erlanger Allee 101
07747 Jena
Germany
Phone: 00 49/36 41/9 32 29 01
Fax: 00 49/36 41/9 32 29 02
Email: torsten.ueberrueck@med.uni-jena.de