Wireless Microrobotic Oxygen Sensing for Retinal Hypoxia Monitoring

Abstract

Abstract. This paper presents a luminescence oxygen sensor for retinalhypoxia monitoring. The sensor coats a wirelessly controlled magnetic microrobot that will operate in the human eye. The coating embodies Pt(II) octaethylporphine (PtOEP) dyes as the luminescence material and polystyrene as a supporting matrix. It is deposited on the microrobot as a thin film and this film is experimentally evaluated using a custom optical setup. Due to the intrinsic nature of luminescence lifetimes, oxygen concentration was determined using a frequency-domain lifetime measurement approach.

MRI-based communication for untethered intelligent medical microrobots

“…Ergeneman et al [38] introduced a microrobotic luminescence oxygen sensor for wireless monitoring of retinal hypoxia. A custom setup for wireless excitation and readout includes a UV LED and a short pass filter for excitation, and a Si photodetector (PD) with a long pass filter for the readout.…”