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Wearable NIRS Device Reveals How Seals Prepare to Dive

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Scientists at the University of St. Andrews have created a wearable, noninvasive device based on near-infrared spectroscopy (NIRS) that can be used to investigate blood volume and oxygenation patterns in freely diving marine mammals, such as seals. When mammals are submerged in water, they show a suite of cardiovascular responses such as reduced heart rate and constriction of peripheral blood vessels. The researchers hypothesized that NIRS could provide high-resolution, relative measures of oxygenated and deoxygenated hemoglobin within specific tissues, which then could be used to...Read full article

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