Paper-Based Test Monitors Metabolites

Paper-Based Test Monitors Metabolites
A paper-based test for monitoring metabolites in blood could offer a new point-of-care option for the diagnosis of various diseases.

Monitoring the levels of phenylalanine in the blood is important for managing a number of medical conditions, but the time it takes to receive results from the lab can hinder treatment. To make it easier to test a patient’s phenylalanine levels, the team from the Max Planck Institute and École Polytechnique created a paper-based test that changes color to indicate how much phenylalanine is in a blood sample. The color change ratio is read via a smartphone, with the results displayed in minutes instead of days.

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