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Models, Devices, Properties, and Verification of Artificial Pancreas Systems

  • Taisa Kushner
  • B. Wayne Bequette
  • Faye Cameron
  • Gregory Forlenza
  • David Maahs
  • Sriram SankaranarayananEmail author
Chapter
Part of the Computational Biology book series (COBO, volume 30)

Abstract

In this chapter, we present the interplay between models of human physiology, closed-loop medical devices, correctness specifications, and verification algorithms in the context of the artificial pancreas. The artificial pancreas refers to a series of increasingly sophisticated closed-loop medical devices that automate the delivery of insulin to people with type 1 diabetes. On the one hand, they hold the promise of easing the everyday burden of managing type 1 diabetes. On the other hand, they expose the patient to potentially deadly consequences of incorrect insulin delivery that could lead to coma or even death in the short term, or damage to critical organs such as the eyes, kidneys, and the heart in the longer term. Verifying the correctness of these devices involves a careful modeling of human physiology, the medical device, and the surrounding disturbances at the right level of abstraction. We first provide a brief overview of insulin–glucose regulation and the spectrum of associated mathematical models. At one end are physiological models that try to capture the transport, metabolism, uptake, and interactions of insulin and glucose. On the end are data-driven models which include time series models and neural networks. The first part of the chapter examines some of these models in detail in order to provide a basis for verifying medical devices. Next, we present some of the devices which are commonly used in blood glucose control, followed by a specification of key correctness properties and performance measures. Finally, we examine the application of some of the state-of-the-art approaches to verification and falsification of these properties to the models and devices considered. We conclude with a brief presentation on future directions for next generation artificial pancreas and the challenges involved in reasoning about them.

Notes

Acknowledgements

The authors gratefully acknowledge detailed comments from the anonymous reviewers. This work was supported in part by the US National Science Foundation (NSF) under grant numbers 1446900, 1446751, and 1646556. All opinions expressed are those of the authors and not necessarily of the NSF.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Taisa Kushner
    • 1
  • B. Wayne Bequette
    • 2
  • Faye Cameron
    • 2
  • Gregory Forlenza
    • 3
  • David Maahs
    • 4
  • Sriram Sankaranarayanan
    • 1
    Email author
  1. 1.University of ColoradoBoulderUSA
  2. 2.Rensselaer Polytechnic InstituteTroyUSA
  3. 3.Barbara Davis Center for DiabetesUniversity of Colorado Anschutz Medical CampusDenverUSA
  4. 4.Stanford University Medical CenterStanfordUSA

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