Dissertation/Thesis Abstract

Incorporating Real-Time Estimates of Physiological States in Artificial Pancreas Systems
by Sevil, Mert, Ph.D., Illinois Institute of Technology, 2020, 187; 27838041
Abstract (Summary)

Type-1 diabetes is a chronic disease that has a negative impact on the life of a person with diabetes causing other chronic diseases, reducing the quality of life, and the possibility of causing dangerous reductions in blood glucose levels that may lead to coma or death. More than 100 million U.S. adults are now living with diabetes or pre-diabetes. Diabetes is one of the most expensive public health problems in the U.S. at $327 billion in 2017. Thus, alternative solutions or novel proposals are crucial to more effective treatments and cure.

Artificial pancreas systems are one of the common treatment techniques of Type-1 Diabetes, which reduce the risk of diabetes-related complications and make diabetics' lives easier and make it convenient. Artificial pancreas systems aim to maintain blood glucose concentrations in a tighter target blood glucose range, which is a challenging problem.

Several factors affect blood glucose concentrations including intensity of exercise, type of exercise, acute psychological stress and the physical state of a person with diabetes. These factors are unknown disturbances for artificial pancreas control systems. In this project, a single non-invasive wrist-worn device is used to obtain different biosignals in-real time. Biosignals are utilized with the development energy expenditure estimation model, psychological stress detection and physical state classification models. Several machine learning methods are tested and validated until the best classification and estimation accuracy is achieved for each estimate. Obtained models are incorporated with the current artificial pancreas design to improve its glycemic control performance. The controller is aware of such measurable disturbances with the proposed method, which allows for providing accurate and timely control action. Additional estimates are utilized to improve blood glucose concentration prediction model accuracy. Clinical trials are used to test and validate the proposed work.

In summary, the presented work illustrates different machine learning techniques and algorithms that can enhance automated insulin delivery by a multivariable artificial pancreas system and enhance the quality of life of people with Type 1 diabetes.

Indexing (document details)
Advisor: Cinar, Ali
Commitee: Papavasiliou, Georgia, Tichauer, Kenneth, Edirisinghe, Indika
School: Illinois Institute of Technology
Department: Biomedical Engineering
School Location: United States -- Illinois
Source: DAI-B 82/1(E), Dissertation Abstracts International
Source Type: DISSERTATION
Subjects: Biomedical engineering, Physiology
Keywords: Artificial pancreas, Energy expenditure estimation, Physical state classification, Psychological and physiological state estimation, Psychological stress detection, Wearable device applications
Publication Number: 27838041
ISBN: 9798662397019
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