Switched LPV Glucose Control in Type 1 Diabetes

Area of Science:

• Biomedical Engineering
• Control Systems
• Endocrinology

Background:

• Type 1 Diabetes Mellitus (T1DM) management requires precise blood glucose regulation.
• Existing control strategies face challenges with interpatient variability and unpredictable lifestyle factors like meals and exercise.

Purpose of the Study:

• To develop a practical and flexible control procedure for regulating blood glucose levels in T1DM patients.
• To design a system capable of switching between distinct controllers based on real-time glucose status and user preference.

Main Methods:

• A switched linear parameter-varying controller was designed with multiple switching regions for hypo-, hyper-, and euglycemia.
• The controller framework ensures stability and performance guarantees.
• The system was validated using the FDA-accepted UVA/Padova metabolic simulator's adult cohort.

Main Results:

• The closed-loop performance demonstrated comparable or improved results against previous control strategies.
• The control structure significantly reduced risks of hypoglycemia and hyperglycemia, particularly in scenarios involving unannounced meals.
• The model, tuned with a priori patient data, effectively addressed interpatient uncertainty.

Conclusions:

• The developed control strategy offers a practical solution for T1DM blood glucose management.
• The system's flexibility allows for the incorporation of unannounced meals and physical activity into the control design.
• This approach enhances patient safety and treatment efficacy by proactively managing glucose fluctuations.