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Fig. 2 | Journal of NeuroEngineering and Rehabilitation

Fig. 2

From: The distribution of acquired peripheral nerve injuries associated with severe COVID-19 implicate a mechanism of entrapment neuropathy: a multicenter case series and clinical feasibility study of a wearable, wireless pressure sensor

Fig. 2

Soft, skin-interfaced sensor for wireless measurements of pressure for COVID19 patients in ICU. A Functional block diagram of the system that is powered through a battery, illustrating a Bluetooth Low Energy (BLE) system-on-a-chip (SoC), which connects to a Wheatstone bridge (WB) and an instrumentation amplifier (Amp) that convert and amplify the signal of the pressure sensor. The analog-to-digital converter (ADC)-sampled data passes through the central processing unit (CPU), which then transmits to BLE radio, displaying real-time data on the graphical user interface (smartphone). B Photograph of the sensor, depicting its thin and flexible form factor. C Photograph of a subject’s elbow, wearing the Tegaderm-secured sensor at the medial epicondyle. G Illustration of an intubated subject with the left arm up, in a reverse Trendelenburg position with chest paddings. E Representative pressure data of the self-proning subject at both left and right arms. Colored regions indicate self-adjustments. F Pressure measured in demonstrated normal prone position on both arms (measured at 10 Hz for 200, 300 s, respectively, data with individual sensor; error bar: SD). D Photograph of a self-proning subject (i.e. patient rolls themselves over on belly), placing his arms with the sensors upward. Red-dashed rectangle shows the unloading of the arm. H Representative pressure data of an intubated subject in the demonstrated normal prone position and the adjusted/optimized position. I Pressure measured in demonstrated normal prone position and adjusted, optimized prone position (measured at 10 Hz for 60, 900 s, respectively, data with the same sensor; error bar: SD)

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