New portable blood analyzer could improve anemia detection w
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With the support from the Department of Education, GAANN Fellowship, and the National Science Foundation, Mechanical engineering researchers at the University of Washington developed a device smaller than a toaster that can detect the level of hemoglobin in whole blood samples using optical absorbance.The current design is a prototype that could be integrated with other microfluidic devices to analyze whole blood samples in parallel to diagnose anemia and other underlying factors that could contribute to the disease.

The mechanism of the analyzer is based on the optical properties of blood like absorption and scattering, to measure hemoglobin concentration. Anemic blood transmits more light compared to normal blood, so the severity of anemia can be measured as a ratio of transmitted to original light intensity. The researchers diluted blood samples with a buffer solution to simulate anemia and the analyzer was effective at predicting cases of moderate to severe anemia, defined as less than 10 grams per deciliter of hemoglobin in a sample without producing any false negative results...

http://www.washington.edu/news/2017/10/04/new-portable-blood-analyzer-could-improve-anemia-detection-worldwide/
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