Physiological Controller for Rotary Blood Pumps

描述(由申请人提供)： 随着慢性机械辅助治疗心脏衰竭的前景正在迅速成为现实，患者确实正在回家恢复正常的生活方式，这项技术对生活质量的限制变得越来越明显。为了解决这些局限性，研究人员正在开发下一代脑室辅助设备。基于涡轮泵技术，这些新设备提供了更小的尺寸，更高的效率(因此更小的电池)，高可靠性，与它们的脉冲式前身相比，更具成本效益。尽管这些新型涡轮泵具有所有优点，但它们也带来了额外的挑战。可以说，最紧迫的是需要更多的“情报”。这些相对无知的设备高度依赖反馈控制来提供正常的生理反应。本文提出的第二阶段工作的目标是设计一种可以集成到这些涡轮动力泵系统中的稳健控制器，用于临床使用。该计划的主要最终产品将是一种经过验证的算法，以固件的形式嵌入现有的旋转泵控制器中--能够在各种血流动力学要求和干扰下保持患者的最佳灌流，同时避免有害条件，如脑室抽吸。

DESCRIPTION (provided by applicant): As the prospects of chronic mechanical assistance for the failing human heart are fast becoming a reality, and patients are indeed returning home to regain a normal lifestyle, the limitations of this technology upon quality of life are becoming more apparent. To address many of these limitations, investigators are developing next-generation ventricular assist devices. Based on turbopump technology, these new devices offer smaller size, greater efficiency (hence smaller batteries), high reliability, and are more cost effective as compared to their pulsatile predecessors. For all the virtues of these new turbopumps, they bring additional challenges. Arguably the most urgent is the need for added "intelligence." These relatively ignorant devices are highly dependent on feedback-control to provide normal physiological response. The goal of the Phase- II effort proposed herein is to design a robust controller that may be incorporated into these turbodynamic pump systems for clinical use. The primary end product of this program would be a validated algorithm, in the form of firmware that will be embedded into existing rotary pump controller -- capable of maintaining optimal perfusion of the patient under a variety of hemodynamic demands and disturbances, while avoiding deleterious conditions such as ventricular suction.