Implantable glucose sensors can measure real time blood glucose as compared to conventional techniques involving
drawing blood samples and in-vitro processing. An implantable sensor requires energy source for operation with wire inout
provision for power and sending signals. Implants capable of generation-transmission of sensory signals, with
minimal or no power requirement, can solve this problem. An implantable nanosensor design has been presented here,
which can passively detect glucose concentration in blood stream and transmit data to a wearable receiver-recorder
system or a watch. The glucose sensitive component is a redox pair of electrodes that generates voltage proportional to
glucose concentration. The bio-electrode, made of carbon nanotubes-enzyme nanocluster, has been investigated because
of the large surface area for taping electrical signals. This glucose sensor can charge a capacitor, which can be a part of a
LCR resonance/inductive coupling based radio frequency (RF) sensor telemetry. Such a system can measure change in
glucose concentration by the induced frequency shift in the LCR circuit. A simultaneous power transmission and signal
transmission can be achieved by employing two separate LCR oscillating loops, one for each operation. The
corresponding coupling LCR circuits can be housed in the wearable receiving watch unit. The data logged in this glucose
monitoring watch can be instrumental in managing blood glucose as trigger for an insulin dispensing payload worn on
person or implanted.
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