Engraving of a medieval doctor examining urine

Engraving of a medieval doctor examining urine

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Credit: NATIONAL LIBRARY OF MEDICINE/SCIENCE PHOTO LIBRARY

Caption: Doctor. 16th century engraving of a doctor examining a glass vessel containing a sample of a patient's urine. In medieval medicine, uroscopy was an important diagnostic tool, urine having 29 attributes to be observed. From this the physician deduced the supposed levels of a patient's four 'humours' (bodily fluids): blood, yellow bile, black bile and phlegm. Illness was thought to be due to an imbalance in these fluids. It was thought that the imbalance could be redressed by changing the patient's diet, prescribing medicine, by bleeding the patient or by surgery. Image drawn by Lorenz Fries of Colmar, Germany, in 1519.

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Keywords: 16th century, 16th century doctor, black and white, black-and-white, diagnosis by uroscopy, doctor, four, healthcare, historical, historical image, history, humour, medical, medicine, medieval doctor, monochrome, monochrome image, people person persons, physician, treatment, urine, urine analysis, uroscopy

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