Engelman M S, Moskowitz S E, Borman J B
J Thorac Cardiovasc Surg. 1980 Mar;79(3):402-12.
Computer simulation was used to compare flow characteristics through Starr-Edwards and Björk-Shiley valves in the mitral and aortic positions. Pressure and velocity determinations were mathematically computed with the use of a model based on the recognition that blood is a non-Newtonian fluid. The results were displayed in two-dimensional graphic form. In both the mitral and aortic positions the Björk-Shiley prosthesis showed a more favorable laminar flow pattern, producing fewer eddies and smaller pressure and velocity gradients through the occluder. Computer simulation is a valuable adjunct in the comparative testing of the hemodynamic properties of artificial heart valves and offers several advantages over physical simulators.
采用计算机模拟来比较斯塔尔-爱德华兹瓣膜和比约克-希利瓣膜在二尖瓣和主动脉位置的血流特性。基于血液为非牛顿流体这一认识，利用一个模型通过数学计算得出压力和速度的测定结果。结果以二维图形形式呈现。在二尖瓣和主动脉位置，比约克-希利人工瓣膜均呈现出更有利的层流模式，通过封堵器产生的涡流更少，压力和速度梯度更小。计算机模拟在人工心脏瓣膜血液动力学特性的比较测试中是一种有价值的辅助手段，与物理模拟器相比具有若干优势。
