A new method called photoacoustic flowoxigraphy shows the oxygen levels of specific red blood cells in real time. Engineers at Washington University in St. Louis used the tool to measure red blood cell function, including speed, hemoglobin concentration and oxygen saturation, according to a study in the Proceedings of the National Academy of Sciences. The lead developer sees the potential for using the tool to monitor changes in blood function due to illness and certain drugs. A short video demonstrates how the technique shows the passage of cells through a branched vessel.
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