HYDRODYNAMIC THRUST BEARING FOR BLOOD PUMPS

血液泵流体动力推力轴承

• 批准号: 6845192
• 负责人: HOOSHANG HESHMAT
• 金额: $ 5万
• 依托单位: MOHAWK INNOVATIVE TECHNOLOGY, INC.
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2004-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6845192
• 关键词: auxiliary heart prosthesis; bioengineering /biomedical engineering; biomaterial development /preparation; biomaterial interface interaction; biomedical equipment development; circulatory assist; clinical biomedical equipment; hemodynamics; hemolysis; implant; magnetic field

DESCRIPTION (Unedited Applicant's Abstract): The ultimate objective of this program is to develop a hydrodynamic thrust bearing for use in a range of continuous flow implantable rotary blood pumps. Development and integration of the MiTi" hydrodynamic thrust bearing into rotary blood pumps such as the proposed MiTi" centrifugal blood pump will enhance overall reliability of this life support system and will result in a compact low power consumption continuous flow pump. Key elements of the proposed program include 1) a detailed integrated blood pump and hybrid bearing system design including permanent magnet radial bearings and the combined active magnetic and passive hydrodynamic thrust bearings; 2) component bearing testing to validate the design and freedom from hemolysis; 3) fabrication of up to three prototype pumps; 4) in-vitro testing of the pump; and 5) preliminary in-vivo studies. In-vitro testing will validate pump and bearing performance, verify that washing flows limit deposition, and verify the lack of hemolysis damage to the blood circulated through the pump. In-vivo testing is planned to demonstrate freedom from deposition related difficulties with the rotor dynamic pump. Key features of the blood pump include only one actively controlled magnetic bearing axis with an integral hydrodynamic thrust bearing for reliability and simplicity, replacement of conventional displacement sensors with self energizing velocity sensors; large clearances throughout the pump that minimize blood shear stresses and promote good forward washing flows. PROPOSED COMMERCIAL APPLICATION: NOT AVAILABLE

描述（未经编辑的申请人的摘要）：此的最终目标 程序是开发出用于在一系列范围内使用的流体动力推力轴承 连续流动植入旋转血泵。发展和整合 MITI“流体动力推力轴承置于旋转血泵，例如 拟议的MITI“离心血泵将提高此的总体可靠性 生命支持系统，将导致紧凑的低功耗 连续流动泵。拟议程序的关键要素包括1） 详细的综合血泵和混合轴承系统设计，包括 永久磁铁径向轴承以及主动磁性和被动的组合 流体动力推力轴承； 2）轴承测试以验证 设计和免于溶血的自由； 3）制造多达三个原型 泵； 4）泵的体外测试； 5）初步的体内研究。 体外测试将验证泵和轴承性能，验证 洗涤流量限制沉积，并验证缺乏溶血损害 血液通过泵循环。计划在体内测试以证明 与转子动态泵相关的困难免于沉积。钥匙 血泵的特征仅包括一个主动控制的磁性 具有整体流体动力推力轴承的轴承轴，可靠性和 简单，用自我替换常规位移传感器 能量速度传感器；在整个泵中最小的大量间隙 血剪应力并促进良好的前向洗涤流。 拟议的商业应用程序：不可用