A Reliable Method For Continuous Glucose Monitoring

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  • This design can help in monitoring the glucose level by a disposable glucose monitoring patch
  • The sensor used in the design satisfies Class-II regulatory limits for Medical Use

Diabetes sufferers must continuously monitor their glucose levels to help them decide when to take the medications. In the present time, handheld blood glucose monitoring devices are used for the measurement of blood glucose levels. These devices require a blood sample to test and provide glucose levels.

The glucose monitoring paradigm
The glucose monitoring paradigm

This reference design is based on the development of a patch-based glucose level monitoring device which eliminates the process of taking blood samples. The designed device is a patch which can be connected to the arms or stomach of the user.

The design uses an electrochemical AFE for body fluid analysis

The design consists of a low power microcontroller which is interfaced with a glucose and temperature sensor. The AFE converts the analogue data recieved through the sensors into a digital signal. This signal is sent to the microcontroller which processes the signal through different algorithms and produces an accurate value of glucose levels.

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The processed data is further sent to a smartphone or a wearable device using Bluetooth as the mode of communication. The device is compliant under BLE devices and thus works on low power consumption. It can work on an onboard coin cell which yields to a compact design and a long working life.

Features real-time monitoring of onboard Battery

The design features a low current consumption module. The circuit can operate in a volage of up to Five Volts. The company claims that the designed circuit consumes 1 milliampere during working modes.

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It has an inbuilt sensor detection mode. This helps the controller IC to work in a low-power mode until a sensor is detected. The design features a compact size of 8.6 mm x 8.66 mm. It helps in easy integration of the design with existing health monitoring modules.

The design also features an open-circuit measurement mode which helps in preventing input and output short circuits. Additionally, it features an on-board voltage and temperature sensor for the battery.

The design has been released and developed by Maxim Integrated. The design includes all the necessary documents for open-source prototyping of the circuit. All the technical documents can be downloaded here.

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