Cell Phones Blood Glucose New Ideas: Reusable Blood Glucose Sensor
Nowadays, smartphones integrate many devices with more and more powerful features, including GPS, barometric sensing, depth perception, and more However, glucose meters are still a stand-alone device for people with diabetes; Many scientists try to integrate the blood glucose meter into our daily use of smart phones to meet the user's daily activities, the need for blood glucose monitoring.
Scientists from the University of California, San Diego (UCSD) have developed a smart phone case and application that helps people in need record and track their blood sugar levels at home or on the road.
Integrating blood glucose measurement functions into your smartphone is naturally of great benefit. First of all, of course, you do not need to have an extra blood glucose meter when you go out. Patrick Mercier, a professor of electronics and computer science at UCSD, said, "The upside is that your phone can automatically store, process, and send blood glucose data to healthcare workers or cloud services."
Called GPhone, the device is a new proof-of-concept portable glucose sensing system developed by Mercier, professor of nano-engineering Joseph Wang and colleagues at the University of California, San Diego Engineering College. Wang and Mercier are the director and deputy director of the wearable sensor center at the University of California, San Diego. Their team published the study at Biosensors and Bioelectronics.
GPhone has two main parts. One of them is a thin 3D printed casing for smartphones, with a permanent, reusable sensor in one corner. The second part is a small, one-time use, and attached to the sensor by magnetic beads. The balls are housed in a 3D printed stylus attached to the side of the smartphone case.
At the time of testing, the user first removes the stylus and places a ball on the sensor, which activates the sensor. Then, the user will drop the blood sample on it. The sensor measures blood glucose levels and wirelessly transmits the data via Bluetooth to a custom designed Android application that displays the numbers on the smartphone screen. The test takes about 20 seconds. The discarded ball is then discarded and the sensor deactivated before the next test. The stylus holds enough balls for 30 tests before needing to refill.
A printed circuit board enables the entire system to run on the battery of the smartphone.
These pellets contain a glucose oxidase that reacts with glucose. The electrical signals generated by this reaction can be measured with the sensor's electrodes. The stronger the signal, the higher the glucose concentration. The team tested the system in different solutions of known glucose concentration. In many tests, the results given by the system are accurate.
One of the key innovations in design is the reusable sensor. In glucose sensors previously developed by the team, enzymes are permanently placed on the electrodes. The problem is that the enzyme is depleted after several uses. The sensor will no longer be valid and must be completely replaced. The enzyme placed in a separate ball is a good solution to this problem.
"The system is versatile and can be easily adapted for testing other substances for medical, environmental and defense applications." At the same time, the system stores large amounts of data so users can track them over a long period of time Blood glucose readings.
The team envisioned one day integrating glucose sensing directly into a smartphone instead of a shell. This work is currently in the proof of concept stage. Next steps the team will take include testing the actual blood sample and minimizing the sample size. They also plan to include a feature in their app to send a reminder to remind users to check their blood sugar.
We look forward to, as scientists continue to work hard, glucose testing capabilities will be integrated into smart phones as soon as possible, for the majority of patients with diabetes more convenient life.
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