Optical biosensors are an exciting technology that combine specific biological elements, such as enzymes, antibodies or aptamers, with optical elements which together can use the interaction of light to measure the concentration of a species. These are already commonly used in healthcare, with sensors like pulse oximeters and heart rate monitors. However, one area of healthcare where they have yet to emerge is drug monitoring. Drug monitoring is a key area of medicine, where measurements of the drug inside the patient can be used to improve the doses and ultimately the outcome of the patient.
The full article is available here; https://doi.org/10.1016/j.bios.2021.113331