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Classification according to ICD-10
R35 Polyuria
ICD-10 online (WHO version 2019)

The polyuria (from Greek πολυουρία poliuría , German , “a lot of urination” ) is the medical name for a pathologically increased urine excretion (increased diuresis ). In adults, this is the case with a urine volume of significantly more than 2 liters in 24 hours (normally 0.8 to 1.5 liters per day).



As a rule, in addition to the increased urine excretion (more than 2 l in 24 hours), there is also an urgent increase in thirst ( polydipsia ) to compensate for the loss of fluid. Often, however, a so-called desiccosis (dehydration) is found.


Differential diagnosis

In psychogenic polydipsia , patients drink too much because of a mental illness. Of course, the amount of urine is secondarily increased. In pollakiuria , the urination frequency is increased without changing the total amount of urine.

Older literature

  • Joachim Frey : Changes in urine volume. In: Ludwig Heilmeyer (ed.): Textbook of internal medicine. Springer-Verlag, Berlin a. a. 1955; 2nd edition, ibid. 1961, pp. 905-910, and pituitary-diencephalic poly- and oliguria : pp. 917-919.

Web links

Wiktionary: polyuria  - explanations of meanings, word origins, synonyms, translations