Re-usable electrochemical glucose sensors integrated into a smartphone platform
Amay J Bandodkar1, Somayeh Imani2, Rogelio Nuñez-Flores1
1Department of Nanoengineering, University of California, San Diego, La Jolla, CA, USA.
Biosensors & Bioelectronics
|October 27, 2017
Summary
A novel smartphone-based glucose meter uses disposable enzyme pellets for reusable sensing. This innovative system overcomes common issues with reusable sensors, offering stable and reproducible glucose measurements for point-of-care applications.
Area of Science:
- Biomedical Engineering
- Sensor Technology
- Analytical Chemistry
Background:
- Reusable glucose sensors often suffer from enzyme degradation, leaching, and hysteresis.
- Existing point-of-care glucose monitoring devices face challenges in durability and ease of use.
Purpose of the Study:
- To develop a smartphone-integrated, reusable glucose meter utilizing a novel pellet-based sensing mechanism.
- To overcome limitations of traditional reusable sensors and enhance point-of-care diagnostics.
Main Methods:
- Designed a custom smartphone case integrating a permanent bare sensor strip and instrumentation circuits.
- Developed a stylus for dispensing enzyme-carbon composite pellets onto the sensor.
- Created an Android application for data acquisition, wireless transmission, and glucose concentration display.
Main Results:
- The pellet-based system demonstrated stability for up to 8 months at ambient conditions.
- Reproducible sensor signals were achieved, overcoming enzyme degradation and leaching issues.
- The system successfully provided a clear display of measured glucose concentration via the smartphone application.
Conclusions:
- The pellet-based sensing system represents a significant advancement for reusable, smartphone-compatible point-of-care glucose monitoring.
- This approach effectively addresses common challenges associated with reusable sensors.
- The system's versatility allows for adaptation to detect various analytes across diverse applications.
