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In medicine, Esophageal Doppler or Oesophageal Doppler uses a small ultrasound probe inserted into the esophagus through the nose or mouth to measure blood velocity in the descending aorta. It is minimally invasive and is used to derive hemodynamic parameters such as stroke volume and cardiac output. A properly constructed and calibrated probe is approved for use on adults and children in many parts of the world.
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