[Effect of hemodynamic conditions and prosthesis structure on endothelialization of clinical and experimental small lumen vascular prostheses].
Seeding of small-diameter vascular prostheses (ID less than or equal to 6 mm) with autologous microvascular cells (AMVC) results in a complete endothelial cell layer on the luminal surface. The purpose of this study was to examine the influence of the blood flow velocity (due to 4 or 6 mm ID) and the structure of inner graft surface (crimped, uncrimped) on the endothelialization. AMVC were harvested from omental adipose tissue (mean: 0.56 X 10(6) cells/g tissue) from 10 mongrel dogs (mean: 27.9 kg). During preclotting, the 4 mm uncrimped and the 6 mm crimped double velour Dacron prostheses (Meadox Medicals, Inc.) were seeded with 1.0 X 10(6) cells/cm2 graft surface. Grafts were implanted into the carotid arteries (N = 5 in each group). The animals received antiplatelet therapy. After five weeks, all seeded prostheses were patent. The thrombus free surface (TFS) of seeded prostheses was 99.9% (4 mm) and 90.5% (6 mm). Scanning electron microscopy revealed an athrombogenic layer of endothelial cells on a smooth surface. -It is concluded that in canine experiments endothelialization of 4 and 6 mm grafts after seeding with AMVC is not affected by blood flow velocity or graft structure.
Baitella-Eberle
G
G
Universitätsspital Zürich.
Lachat
M
M
Müller-Glauser
W
W
Neudecker
A
A
von Segesser
L K
LK
Turina
M
M
D000818:Animals; D001807:Blood Vessel Prosthesis; D004285:Dogs; D004730:Endothelium, Vascular / Q000473:pathology*; D006439:Hemodynamics / Q000502:physiology*; D008855:Microscopy, Electron, Scanning; D011093:Polyethylene Terephthalates; D011474:Prosthesis Design
D011093:Polyethylene Terephthalates
Einfluss der hämodynamischen Bedingungen und der Prothesenstruktur auf die Endothelialisierung von klinischen und experimentellen kleinlumigen Gefässprothesen.