PLASMA PROTEIN REACTIONS IN SEPARATED FLOWS

认识和控制血表的首要问题 反应是无法与精确的，但有限的信息获得 从体外研究到心血管疾病 使用假体或人造器官。 这里提出的工作将联系 对血液蛋白质 在不移动中，高度稀释的等离子体溶液吸附、反应和解吸， 生物材料表面。 建议的工作涉及四个能力：（1） 在便利的实验室环境中建立“分离流”。 （在这样的流动中，在临床程序开始时，全血是 可能在接触生物材料表面之前被稀释， 流动被怀疑有利于血栓形成的开始）。 (2)成像 蛋白质沉积在表面上的模式结合分离的流动， 利用金属氧化物颗粒， 指定蛋白质。 (3)使用生物试验，在原位， 吸附蛋白质的反应性。 (4)分析几何 使用扫描设备和计算机工作站 用于图像分析。 从这项工作中得出的结论将得到以下方面的证实： 在同一分离流装置中与全血接触的表面。 使用的表面包括清洁的玻璃以及NHLBI参考 生物材料、聚二甲基硅氧烷和低密度聚乙烯。

The overriding problem of understanding and controlling blood-surface reactions is inability to relate precise but limited information obtained from in vitro studies to the process that takes place when a cardiovascular prosthesis or artificial organ is employed. Work proposed here would link to clinical conditions well-established descriptions of how blood proteins in unmoving, highly dilute plasma solutions adsorb, react and desorb at biomaterial surfaces. The proposed work involves four capabilities: (1) Establishing "separated flows" in a convenient laboratory environment. (Within such flows, at the start of clinical procedures, whole blood is likely to be diluted before it contacts biomaterial surfaces, and such flows are suspected of favoring the initiation of thrombosis.) (2) Imaging patterns of protein deposition on surfaces which bound separated flows, utilizing metal oxide particles that have been rendered specific to designated proteins. (3) Using biological tests, in situ, for determining the reactivity of the adsorbed proteins. (4) Analyzing the geometric aspects of these patterns using a scanning device and computer workstation for image analysis. Conclusions drawn from this work would be confirmed by contacting surfaces with whole blood in the same separated-flow apparatus. Surfaces to be used include cleaned glass as well as the NHLBI reference biomaterials, polydimethylsiloxane and low-density polyethylene.