Wearable Electrochemical Glucose Sensors in Diabetes Management: A Comprehensive Review

With the rising diabetic population, the demand for glucose sensing devices has also been on an increasing trend. Accordingly, the field of glucose biosensors for diabetes management has witnessed tremendous scientific and technological advancements since the introduction of the first enzymatic glucose biosensor in the 1960s. Among these, electrochemical biosensors hold considerable potential for tracking dynamic glucose profiles in real time. The recent evolution of wearable devices has opened opportunities to use alternative body fluids in a pain-free, noninvasive or minimally invasive manner. This review aims to present a comprehensive report about the status and promise of wearable electrochemical sensors for on-body glucose monitoring. We start by highlighting the importance of diabetes management and how sensors can contribute toward its effective monitoring. We then discuss the electrochemical glucose sensing mechanisms, evolution of such glucose sensors over time, different versions of wearable glucose biosensors targeting various biofluids, and multiplexed wearable sensors toward optimal diabetes management. Finally, we focus on the commercial aspects of wearable glucose biosensors, starting with existing continuous glucose monitors, followed by other emerging sensing technologies, and concluding with highlighting the key prospects toward personalized diabetes management in connection to an autonomous closed-loop artificial pancreas.