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We review two generations of smart bandages and sensors developed in our group. These devices are capable of monitoring and treating chronic wounds through O2, pH and strain measurement and on-demand drug delivery. First we seek to close the gap between patient and caregivers through continuous monitoring of wound healing status with oxygenation measurements coupled with wireless data acquisition...
We demonstrate a thread-based pH sensor integrated with a custom CMOS readout IC as a smart bandage for chronic wound monitoring. pH sensing threads are fabricated using a low-cost, room-temperature dip-and-dry coating process to coat cotton threads with carbon ink and polyaniline (PANI) nanofibers. Bluetooth wireless connectivity and smart phone readout enable real-time monitoring. Threads exhibit...
Current methods in treating chronic wounds have had limited success in large part due to the open loop nature of the treatment. In turn, we have created a localized smart wound dressing platform that will allow for real time data acquisition of oxygen concentration at the wound site. This will serve as the first leg of a feedback loop for a fully optimized treatment mechanism tailored to the individual...
This paper illustrates an architectural design of a novel variable input-feature correlated asynchronous sampling and time-encoded digitization approach for source compression and direct feature extraction from physiological signals. The complete architecture represents an analog-to-information (A2I) converter, designed for ultra-low-power mixed-signal very-large-scale integrated implementation. The...
An asynchronous electrocardiogram (ECG) acquisition system is presented for wearable ambulatory monitoring. The proposed system consists of a low noise front-end amplifier (AFE) with tunable bandwidth, an asynchronous analog-to-digital converter (ADC), and digital signal processing (DSP). Data compression is achieved by the inherent signal dependent sampling rate of the asynchronous architecture....
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