EAGER: Analysis of Thermoelectric On-Site Cooling Devices for Therapeutic Applications

EAGER：用于治疗应用的热电现场冷却装置分析

• 批准号: 1250659
• 负责人: Kenneth Diller
• 金额: $ 19.87万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1250659&HistoricalAwards=false
• 关键词: EAGER; Analysis; Thermoelectric; Site; Cooling

CBET - 1250659PI: DillerThis project is motivated by the need to substantially improve the quality and safety of our ability to administer cooling therapy, with the potential to save thousands of lives and eliminate thousands of device-induced injuries annually. The opportunity to conduct this research has been created by two major technical breakthroughs. On the one hand, the PI?s laboratory has discovered how to apply physiological principles to on demand create large heat flows between the body core and the skin surface for therapeutic purposes, and also how to break the chain of deep ischemia associated with tissue cooling therapy that can lead to ischemic-induced injury. On the other hand, there have recently been significant advances in developing new thermoelectric materials that enable devices to operate with much higher efficiencies than in the past. As a consequence, for the first time it is possible to apply thermoelectric modules directly to the surface of a treatment site, doing away with the traditional connections to an external refrigerator and circulating water lines to provide cooling therapy. At the temperatures requisite for medical cooling, thermoelectric materials can produce a figure of merit ZT of about 1.0 that is sufficient to generate adequate heat flow rates. Coverage of complex three-dimensional anatomic sites will be achieved with a matrix of small thermoelectric modules affixed to a flexible, thermally conductive substrate. Each module will have a thermal sensor to provide feedback signals that can be used to modulate the cooling effect in both time and space for specifically designed therapeutic protocols. An engineering challenge will be to provide the connectivity and control to operate all elements of the module matrix in concert. Subjects will be instrumented to monitor surface and core temperatures along with important physiological properties including skin blood flow at the heat transfer site. Performance of the thermoelectric device will be assessed in terms of compatibility with adaptation to medical applications and the ability to control physiological temperatures and blood flow. This project will apply thermoelectric modules to fabricate and test refrigeration systems that can be used directly on an area of the body surface for therapeutic cooling. The capability can be used to treat medical conditions such as a stroke, heart attack, or concussion that can cause a life threatening lack of oxygen to the brain and to treat soft tissue injuries. This type of device will be safer and easier to use than any currently available alternatives, and it is designed for small size, light weight, and low power consumption to allow it to be used by first responders in ambulances so that treatments can be started early when time is of the essence. Successful completion of this project would enable more effective cooling therapies to be designed and executed than have ever before been possible and could save thousands of lives annually.

CBET -1250659 PI：Diller该项目的动机是需要大幅提高我们实施冷却治疗的质量和安全性，每年有可能挽救数千人的生命并消除数千起器械引起的伤害。开展这项研究的机会是由两项重大技术突破创造的。一方面，PI？他的实验室已经发现了如何应用生理学原理，根据需要在身体核心和皮肤表面之间产生大量的热流，以达到治疗目的，以及如何打破与组织冷却治疗相关的深度缺血链，这种深度缺血链可能导致缺血诱导的损伤。另一方面，最近在开发新的热电材料方面取得了重大进展，使设备能够以比过去高得多的效率运行。因此，第一次有可能将热电模块直接应用于治疗部位的表面，消除了与外部制冷器和循环水管线的传统连接，以提供冷却治疗。在医疗冷却所需的温度下，热电材料可以产生约1.0的品质因数ZT，其足以产生足够的热流率。覆盖复杂的三维解剖部位将实现一个矩阵的小热电模块固定到一个灵活的，导热基板。每个模块将具有热传感器，以提供反馈信号，该反馈信号可用于在时间和空间上调节冷却效果，以用于专门设计的治疗方案。一个工程挑战将是提供连接和控制，以协调一致地操作模块矩阵的所有元素。将为受试者配备仪器，以监测表面和核心温度沿着重要的生理特性，包括传热部位的皮肤血流。热电装置的性能将在适应医疗应用的兼容性以及控制生理温度和血流的能力方面进行评估。该项目将应用热电模块来制造和测试制冷系统，这些制冷系统可以直接用于身体表面的某个区域进行治疗冷却。这种能力可用于治疗中风、心脏病发作或脑震荡等可能导致危及生命的大脑缺氧的疾病，以及治疗软组织损伤。这种类型的设备将比任何现有的替代品更安全，更容易使用，并且它的设计尺寸小，重量轻，功耗低，允许救护车上的急救人员使用，以便在时间紧迫时尽早开始治疗。该项目的成功完成将使设计和执行比以往任何时候都更有效的冷却疗法成为可能，每年可以挽救数千人的生命。