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. Author manuscript; available in PMC: 2021 Oct 15.
Published in final edited form as: Biosens Bioelectron. 2021 Jan 23;178:113007. doi: 10.1016/j.bios.2021.113007

Figure 6. Wireless battery-free oximetry sensors.

Figure 6.

A) Photographic image of oximeter device with key electrical component labeled. B) Image of device during operation while applied to the fingernail and earlobe. C) Plot of red and infrared (IR) signal from both wireless, battery-free and commercially available devices during user motion. D) Image of wireless localized oximeter device during operation. Inset shows exploded view make up of injectable probe. E) Image of oximetry probe implanted in tissue region of the femoral artery. F) Plot of rStO2 readout in tissue region while anesthetized rat is exposed to FiO2 concentrations. of 100% (red) and 8% (purple).