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A disposable tear glucose biosensor-part 2: system integration and model validation.

Jeffrey T La Belle¹, Daniel K Bishop, Stephen R Vossler

¹Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5801 , USA. jeffrey.labelle@asu.edu

Journal of Diabetes Science and Technology

|March 24, 2010

Summary

This summary is machine-generated.

A novel tear glucose sensor prototype was developed and tested, showing a low detection limit and reproducibility for monitoring glucose levels non-invasively. Future studies will assess its safety and correlation with blood glucose in animal models.

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Area of Science:

Biomedical Engineering
Ophthalmology
Diabetes Technology

Background:

A previous concept for a tear glucose sensor system was introduced.
This study provides further data on prototype testing, focusing on an integrated fluidics component.

Purpose of the Study:

To assemble and test an integrated tear glucose sensor prototype.
To evaluate the prototype's performance, including its lower limit of detection and reproducibility.

Main Methods:

An integrated fluidics system was designed, cast, and tested.
Screen-printed sensors were combined with silicone rubber fluidics and absorbent foam.
A simulated eye surface was used to test prototype reproducibility and dynamic glucose detection range.

Main Results:

The prototype demonstrated a lower limit of detection of 43.4 microM.
A linear dynamic range from 0 to 1000 microM was achieved with R(2) of 99.56%.
The observed variance (15.8%) closely matched the predicted variation (14.9%).

Conclusions:

The integrated tear glucose prototype is suitable for measuring glucose concentration in tears.
The device shows satisfactory lower limit of detection and reproducibility within the physiological range.
Next steps include animal studies to evaluate eye irritation, usability, and blood glucose correlation.