[Expansion, deformation and bursting characteristics of frequently used balloon dilatation catheters. In vivo studies on canine vessels (2)].
In an experimental angioplasty study in dogs, we evaluated the characteristics of dilatation and deformation, as well as the pressure requirements, bursting points, and types of bursting of four different balloon dilatation catheters. The balloons, which were selected 0%, 30%, and 80-100% larger than the arterial lumen, measured 4, 6, and 8 mm in diameter and were inflated with an automated pump which simultaneously recorded balloon pressure and volume. Changes to the vessel wall were assessed radiographically and by histology. In vivo, balloon dilatation catheters demonstrated a markedly different behaviour than in vitro. Significantly higher pressures were tolerated due to the support of the arterial sleeve. Non-compliant oversized balloons caused more damage to the arterial wall than compliant ones. Oversized balloons attained their required diameters only with high inflation pressures of 10 to 12 atm or after rupture of the artery.
D000800:Angioplasty, Balloon / Q000295:instrumentation*; D000818:Animals; D004285:Dogs
Dehnungs-, Verformungs- und Berstungscharakteristika häufig verwendeter Ballondilatationskatheter. In-vivo-Untersuchungen an Hundegefässen (Teil 2).