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    Continuous and noninvasive microwave biosensor for lactate monitoring

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    Author
    Koehler, Katie
    Lee, T. Ann
    Langdon, D.
    Quach, C.
    Elmiladi, L.
    Kaylor, H.
    Dang, E.
    Street, S.
    Dulitz, C.
    Jones, R.
    Aaen, Peter H.
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    Date
    2023-04
    
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    URI
    https://hdl.handle.net/11124/178001; https://doi.org/10.25676/11124/178001
    Abstract
    This project proposes a microwave biosensor to noninvasively and continuously detect the concentration of lactate in athletes and healthcare patients. Lactate is a byproduct produced during aerobic and anaerobic metabolism when the body cannot produce sufficient oxygen to meet the body’s energy demands. In athletes, these levels are currently tracked by blood samples to determine the athlete’s fitness level. In healthcare patients, lactate production is measured to determine the oxygen supply to a patient’s tissues. By monitoring lactate levels, healthcare providers can provide appropriate treatment and improve patient outcomes, while athletes can adjust their training plans to improve performance and reduce the risk of injury. In the initial phase of our sensor development, we report on the initial design by testing the sensor’s sensitivity to detect salt concentration changes in deionized water in a well-controlled laboratory environment. The sensor consists of a microwave resonator and microfluidic chip assembly, and it allows us to detect small changes in the dielectric properties of the deionized water solution resulting from different salt concentration levels. The results of this study will be used to further refine the sensitivity of the sensor as we move towards developing the lactate sensor.
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