ATS推出新型机械心脏瓣膜

 
 
一项研究显示，使用新型机械心脏瓣膜导致的溶血和血栓形成的几率。

使用新型计算机化液体动力学模型，来自Ghent大学的科学家研究报道在两个几何模型中，三维血流通过新型Open Piovt心脏瓣膜的情况，这种新技术能够帮助更好地了解机械心脏瓣膜的血液动力学功能。这项研究证实：先前发表的资料，那些资料显示与ATS医疗公司的Open Pivot瓣膜相关的血液动力学和小叶运动依赖放置瓣膜位置的解剖形状。这项研究资料发表在2005年5月《心脏瓣膜疾病期刊》。

在一个模拟天然人体解剖的扩大几何模型中，这项研究的作者发现分叉血流与ATS Open Pivot心脏瓣膜的相互作用，降低了小叶的跨血管压力梯度和剪切压力，以及潜在的对血小板和血细胞的损伤。这些结果提示：已经报道的Open Pivot瓣膜常见的溶血和血栓形成事件，或许与血流流经Open Pivot瓣膜直接相关。

与其他机械心脏瓣膜不同，ATS Open-Pivot心脏瓣膜面积不包含空腔或者凹陷处，那通常会迟滞血流。相反Open-Pivot铰链稍稍突出血流之中，提供持续被动冲洗，这被认为能够轻轻搅动脆弱的血细胞。

ATS医疗公司制造销售侧重于心脏外科产品与服务， 在超过60多个国家中销售他们公司的产品。
 
Novel Mechanical Heart Valve
 
A study has shown that use of a novel mechanical heart valve results in low rates of hemolysis and thromboembolic events.

Using a new computational fluid dynamics model, scientists from the University of Ghent (Belgium) researched and reported on three-dimensional (3D) flow through this new open pivot heart valve in two geometric models, a new technique that improves the understanding of the hemodynamic function of mechanical heart valves. The study confirmed previously published data showing that valve hemodynamics and leaflet motions associated with the Open Pivot heart valve of ATS Medical, Inc. (Minneapolis, MN, USA) are dependent on the shape of the anatomy in which the valve is placed. The study was published in the May 2005 issue of The Journal of Heart Valve Disease.

In an expanding geometry model that simulates native human anatomy, the study’s authors found that diverging blood flow interacts with the opening mechanism of the ATS Open Pivot heart valve to reduce transvascular pressure gradients, shear stress on the leaflets, and the potential for damage to platelets and blood cells. These results suggest that the low rates of hemolysis and thromboembolic events commonly reported for the Open Pivot valve may be directly related to the flow patterns through the open pivot design.

Unlike all other mechanical heart valves, the pivot areas of the ATS Open-Pivot heart valve do not contain cavities or recesses that could allow for areas of stagnant flow. Instead, the open pivot hinge protrudes gently into the blood flow, providing continuous passive washing which is thought to be gentler on fragile blood cells.

ATS Medical manufactures and markets products and services focused on cardiac surgery and sells its products in more than 60 countries.