Une puce pour détecter et prévenir de possibles accidents cardiaques

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2024-09-18

Picture MUST credit: Will Kirk/Johns Hopkins University A new blood test that diagnoses heart attacks in minutes rather than hours has been developed by researchers. And the potentially life-saving device could be adapted as a tool like sci-fi TV show Star Trek's medical tricorder for first responders and people at home. People suspected of having heart attacks typically are given a combination of tests to confirm the diagnosis. They usually start with electrocardiograms to measure the electrical activity of the heart, a procedure that takes about five minutes. That's followed by blood tests but lab work can take at least an hour and often has to be repeated. The new stand-alone blood test provides results in five to seven minutes. It's also more accurate and more affordable than current methods, the researchers say. Research scientist Peng Zheng at the USA's Johns Hopkins University in Baltimore, Maryland and bioengineer Ishan Barman developed the diagnostic tool through bio-photonics. This is a system that uses laser light to detect biomarkers, which are bodily responses to conditions including disease. The heart of the invention is a tiny chip with a groundbreaking nano-structured surface on which blood is tested. The chip's surface enhances electric and magnetic signals during spectroscopy analysis, making heart attack biomarkers visible in seconds, even in ultra-low concentrations. The tool is sensitive enough to flag heart attack biomarkers that might not be detected at all with current tests, or not detected until much later in an attack. Picture supplied by JLPPA

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