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Continuous glucose monitoring and closed-loop systems
1Diabetes Modelling Group, Department of Paediatrics, University of Cambridge, Cambridge, UK. r.hororka@uk.avecho.com
Diabetic Medicine : a Journal of the British Diabetic Association
|January 18, 2006
Summary
Continuous glucose monitoring has advanced, but limitations in sensor accuracy and reliability hinder the development of commercial closed-loop systems for diabetes management. Regulatory hurdles also present challenges.
Area of Science:
- Biomedical Engineering
- Medical Devices
- Diabetes Technology
Background:
- Continuous glucose sensors have seen significant advancements over the last two decades.
- This progress has spurred the development of closed-loop systems integrating glucose monitoring, control algorithms, and insulin pumps.
Purpose of the Study:
- To review electromechanical closed-loop approaches for diabetes management.
- To assess existing prototypes and glucose sensors used in these systems.
Main Methods:
- A literature review was conducted from 1960 to 2004.
- The review focused on electromechanical closed-loop systems and associated glucose sensors.
Main Results:
- Two primary approaches were identified: extracorporeal (subcutaneous-in, subcutaneous-out) and implantable (intravenous-in, intraperitoneal-out).
- Both approaches demonstrated feasibility in laboratory settings with proportional-integral-derivative and model predictive controllers, but home-use performance remains unproven.
Conclusions:
- The primary limitation for commercial viability is the glucose monitor's reliability and accuracy.
- Regulatory issues are a secondary limiting factor.
- Closed-loop systems are anticipated for initial use by healthcare professionals in controlled environments like intensive care units.
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