INHERENTLY CONTROLLED MAGNETIC BEARING ROTARY BLOOD PUMP

固有控制磁力轴承旋转血泵

• 批准号: 6211193
• 负责人: HSIANG M CHEN
• 金额: $ 21.73万
• 依托单位: FOSTER-MILLER TECHNOLOGIES, INC.
• 依托单位国家: 美国
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6211193
• 关键词: auxiliary heart prosthesis; bioengineering /biomedical engineering; biomedical equipment development; circulatory assist; electrical conductance; magnetism

Three-dimensional magnetic field support of blood pump rotors has been pursued as a means to produce next-generation rotodynamic pumps. Early designs were not completely successful, most probably due to a lack of sufficient stiffness in the suspension. However, newer designs have achieved some significant successes, and efforts are being undertaken to reduce the size and power consumption of these pumps. The specific aim of this Phase I project is to demonstrate, in a blood pump configuration, the feasibility of a magnetic bearing concept that can be used to develop more robust, higher reliability rotary blood pumping systems. The project will explore the effectiveness of implementing a self-regulating magnetic suspension based on a tuned inductance-capacitance-resistive electromagnetic (LCR-EM) circuit. Control of the levitation is essentially inherent in the construction of the circuit, and by the geometry and dynamic characteristics of the pump in which it is installed. Phase I will involve the analysis, design, fabrication, and test of a prototype blood pump that incorporates the LCR-EM circuit. Planned test activities include bench-top tests, submerged tests in various fluids, shock and vibration assessments, and mock loop tests. PROPOSED COMMERCIAL APPLICATIONS: Heart disease remains the leading cause of death and disability within the United States. Of the 200,000 Americans who die each year due to heart- related problems, about 30,000 to 60,000 could probably be saved with heart transplants. However, the shortage of donor hearts precludes this, and has stimulated the development of many mechanical heart assist and replacement devices. Should mechanical assist pumps prove sufficiently safe and reliable, the potential use to improve the quality of life for cardiac- impaired patients dramatically expands the market.

血泵转子的三维磁场支持已被追捕，作为产生下一代旋转动力泵的一种手段。早期设计并不是完全成功的，很可能是由于悬架缺乏足够的刚度。但是，较新的设计取得了一些巨大的成功，并正在努力减少这些泵的尺寸和功耗。该阶段I项目的具体目的是在血液泵的配置中证明磁性轴承概念的可行性，该概念可用于开发更强大，更高的可靠性旋转血液抽水系统。该项目将探讨基于调整的电感抗性电磁电磁（LCR-EM）电路实施自我调节的磁悬浮液的有效性。悬浮的控制本质上是电路的构造，以及安装泵的几何形状和动态特征。第一阶段将涉及结合LCR-EM电路的原型血泵的分析，设计，制造和测试。计划的测试活动包括基准测试，各种流体中的淹没测试，冲击和振动评估以及模拟环测试。拟议的商业应用：心脏病仍然是美国死亡和残疾的主要原因。每年因与心脏相关的问题而死的200,000名美国人中，可能会通过心脏移植来保存约30,000至60,000。但是，捐助者心脏的短缺无法做到这一点，并刺激了许多机械心脏辅助设备和替换设备的发展。如果机械辅助泵被证明是足够安全和​​可靠的，则可以极大地扩大市场的潜在用于改善心脏受损患者生活质量的潜在用途。