Abstract
Bilirubin is a biomarker for liver inflammation used to assess liver functions. Its concentration in the blood has been measured using a range of techniques both in clinical and point-of-care settings. Existing point-of-care devices utilize a spectral approach, namely dual-wavelength absorption measurement, to assess the blood bilirubin concentration. This work examines a novel temporal approach based on the photodegradation of bilirubin in the blood sample. It demonstrates that combining photodegradation characteristics with dual-wavelength measurement produces a more accurate technique for measuring blood bilirubin concentration. Tracking the evolution of absorbed light as a function of time represents a low-cost and simple way of improving the accuracy of point-of-care devices for bilirubin measurements.Clinical Relevance - This work demonstrates a facile and cheap bilirubin monitoring approach that may allow bilirubin monitoring applications in homes after a patient is discharged from a hospital, which may decrease the burden on patients, families, and clinicians.
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