权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Real-Time Monitoring Device for Vascular Signals

血管信号实时监测装置

基本信息

批准号：
9241893
负责人：
Steve Majerus
金额：
--
依托单位：
LOUIS STOKES CLEVELAND VA MEDICAL CENTER
依托单位国家：
美国
项目类别：
财政年份：
2016
资助国家：
美国
起止时间：
2016-03-01 至 2018-02-28
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9241893
关键词：
Address Algorithms Angiography Angioplasty Arteries Arteriovenous fistula Auscultation Award Basic Science Blood Blood Vessels Blood flow Bypass Caring Characteristics Chronic Clinic Clinical Clinical Research Collection Contralateral Custom Data Development Dialysis patients Dialysis procedure Economics Electronics Equipment Exposure to Failure Feasibility Studies Fistula Floor Foundations Frequencies Funding Future Goals Gold Health Health Technology Hemodialysis Home environment Hospitals Human Human Resources Human Volunteers Institutional Review Boards Interventional radiology Kidney Failure Lead Location Longevity Maintenance Measurement Measures Methods Miniaturization Modality Modeling Monitor Morbidity - disease rate Needles Noise Operative Surgical Procedures Outcome Patients Performance Peripheral Phase Physicians Principal Component Analysis Process Protocols documentation Publications Publishing Quality of Care Recruitment Activity Reproducibility Research Research Personnel Risk Sampling Sensory Side Signal Transduction Skin Temperature Stenosis Stethoscopes Surveillance Program Techniques Technology Testing Thermometers Thrombosis Time Training United States National Institutes of Health Vascular Patency Veins Veterans Visit Wireless Technology Work arm base career checkup examination clinical application clinical candidate clinical practice clinical translation cost design digital equipment training experimental study graft healing inclusion criteria innovation innovative technologies interest man mathematical analysis monitoring device mortality non-invasive monitor novel novel strategies patient population programs prospective prototype public health relevance repaired research clinical testing response restenosis screening sensor sound standard of care success tool translational impact transmission process trend

项目摘要

DESCRIPTION (provided by applicant): Long-term dialysis success and cost is dependent on maintaining a patient's vascular access, a surgically- created artery-vein bypass region that can permit high blood flow. During dialysis, blood is drawn from a needle in the arterial side of the access, filtered by a hemodialysis unit, and then returned to the patient through a second downstream needle. The vascular access is also known as the "Achilles Heel" of hemodialysis, as maintaining the high flow characteristics (access patency) is critical to achieving efficient dialysis treatment. Vascular accesses are subjected to monitoring and surveillance to identify internal narrowing (stenosis) which can lead to access blockage (thrombosis). The goal of access monitoring is to pre- emptively treat stenosis with a routine surgical procedure before thrombosis occurs. Current access monitoring relies on skilled operators and specialized equipment and cannot be effectively applied to all patients due to economic realities within the hemodialysis standard-of-care. We propose clinical experiments to demonstrate and evaluate new approaches for non-invasive screening of hemodialysis vascular access patency. We are interested in studying the feasibility of autonomously gathering vascular signals using digital stethoscopes and skin temperature measurements to provide a continuous and real-time measure of arteriovenous graft patency. We will pursue this research to answer hypotheses regarding the reproducibility and feasibility of this non-invasive monitoring method, and to demonstrate innovative technology to enable clinical application. A second objective of this work is to train Steve Majerus to be an independent researcher capable of investigating future directions for vascular health technology. Our research plan will be conducted through two objectives. Objective 1 will conduct a clinical study at the Cleveland VA Midtown Hemodialysis Center in which digital stethoscopes and infrared (IR) thermometers will be used to gather non-invasive signals near patient's vascular accesses. These signals have been shown to be accurate indicators of access patency; we seek to understand the signal characteristics and variability across patients and within patients on chronic dialysis. Objective 2 will determine the feasibility of non-invasively measuring vascular sounds and skin temperatures using wireless electronics. This is an important experiment to understand the reproducibility and variability of this approach. To make an impact within the realities of over-loaded dialysis clinics, the measurement method must be convenient to use and accurate when used by a non-physician. The limitations of the proposed wireless approach will be assessed to determine prototype feasibility and future directions. This study aims to pursue hypothesis-driven research while producing innovative platform technologies in the fields of vascular signal analysis and wireless, wearable sensor design. A comprehensive analysis of phonoangiograms and skin temperature measurements relative to vascular access stenosis level and location has not yet been published. Published examples of wireless screening tools have relied on traditional auscultation via a skilled operator. We seek to demonstrate the feasibility of state-of-the-art electronics and sensor integration technology that is suitable for clinical deployment. This technology would be an excellent candidate for clinical translation as it could enable simple screening of vascular access patency within the economic constraints of freestanding dialysis clinics.

描述（由申请人提供）：长期透析的成功和成本取决于维持患者的血管通路，这是一个手术创建的动脉-静脉旁路区域，可以允许高血流量。在透析期间，血液从通路的动脉侧的针抽取，由血液透析单元过滤，然后通过第二下游针返回到患者。血管通路也被称为血液透析的“阿喀琉斯之踵”，因为保持高流量特性（通路通畅性）对于实现有效的透析治疗至关重要。对血管通路进行监测和监视，以识别可能导致通路堵塞（血栓形成）的内部狭窄（狭窄）。入路监测的目的是在血栓形成发生前通过常规外科手术预先治疗狭窄。目前的通路监测依赖于熟练的操作员和专业设备，并且由于血液透析标准护理中的经济现实，不能有效地应用于所有患者。我们提出临床实验来证明和评估新的方法，无创筛选血液透析血管通路通畅。我们有兴趣研究使用数字听诊器和皮肤温度测量自动收集血管信号的可行性，以提供动静脉移植物通畅性的连续和实时测量。我们将继续这项研究，以回答有关这种非侵入性监测方法的可重复性和可行性的假设，并展示创新技术，使临床应用。这项工作的第二个目标是培训史蒂夫Majerus成为一个独立的研究人员能够调查未来的方向血管健康技术。我们的研究计划将通过两个目标进行。目标1将在Cleveland VA Midtown血液透析中心进行一项临床研究，其中将使用数字听诊器和红外（IR）温度计收集患者血管通路附近的无创信号。这些信号已被证明是通路通畅性的准确指标;我们试图了解患者之间和慢性透析患者内部的信号特征和变异性。目标2将确定使用无线电子设备无创测量血管声音和皮肤温度的可行性。这是一个重要的实验，以了解这种方法的可重复性和可变性。为了在超负荷透析诊所的现实中产生影响，测量方法必须方便使用，并且在由非医生使用时准确。将评估拟议的无线方法的局限性，以确定原型的可行性和未来的发展方向。本研究旨在进行假设驱动的研究，同时在血管信号分析和无线可穿戴传感器设计领域产生创新平台技术。尚未发表关于血管通路狭窄水平和位置的声血管造影和皮肤温度测量的综合分析。无线筛查工具的公开示例依赖于通过熟练操作员进行的传统听诊。我们试图证明适合临床部署的最先进的电子和传感器集成技术的可行性。该技术将是临床转化的一个很好的候选者，因为它可以在独立透析诊所的经济限制范围内实现血管通路通畅性的简单筛选。