Anandghan Waghmare
Publications

GlucoScreen

IMWUT 2023A readerless glucose test strip read by any smartphone touchscreen.

Early detection of prediabetes can forestall or reverse more serious illness, but current screening requires visits to a healthcare facility or a dedicated glucometer, both of which are costly or inaccessible for many populations.

GlucoScreen is a readerless glucose test strip that enables affordable, single-use, at-home glucose testing, using the phone's capacitive touchscreen to read and display results. By adding minimal, low-cost, battery-free electronics to commercially available test strips, it works with any smartphone and removes the need for a separate reader.

In an in vitro evaluation across five phones, GlucoScreen's mean absolute error was 4.52 mg/dl (Accu-Chek strips) and 3.7 mg/dl (True Metrix strips), compared to 4.98 and 5.44 mg/dl for the corresponding glucometers. In a clinical study with 75 patients, GlucoScreen's error was 10.47 mg/dl versus 9.88 mg/dl for the Accu-Chek glucometer, comparable to commercial devices.

GlucoScreen: a disposable glucose test strip that attaches to any smartphone, so no separate glucose meter is needed.
GlucoScreen: a disposable glucose test strip that attaches to any smartphone, so no separate glucose meter is needed.
How it works: a standard glucose test strip plus a tiny battery-free circuit. The circuit taps the phone's touchscreen in a pattern that encodes the glucose level, and an app decodes it.
How it works: a standard glucose test strip plus a tiny battery-free circuit. The circuit taps the phone's touchscreen in a pattern that encodes the glucose level, and an app decodes it.
Using it: stick the strip to the phone screen, add a drop of blood, and the result appears in the app.
Using it: stick the strip to the phone screen, add a drop of blood, and the result appears in the app.