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The medical term diuresis ( ancient Greek διά diá , German 'through' and ancient Greek οὐρέω uréō , German ' to urinate' ) describes the excretion of urine through the kidneys . In humans, this is around one to one and a half liters per day.

The diuresis is influenced by medical measures:

  • The diuresis can be increased by the administration of water tablets, so-called diuretics . This approach is in various kidney and heart - circulatory diseases useful to the circulatory stress by a relatively excessive blood to reduce volume, z. B. in heart failure .
  • In the context of intensive medical detoxification measures, forced diuresis is carried out with the aim of removing toxic and water-soluble substances from the organism through strong urine production.
  • The hormone adiuretin (ADH), which is produced in the hypothalamus and stored in the posterior lobe of the pituitary gland , is responsible for the reabsorption of water in the middle part of the tubules in the kidneys and thus inhibits diuresis.

Physical variables affecting the body can also influence diuresis, so activity increases when exposed to cold or pressure (for example in water) or at low air pressure (for example above approx. 3000 m altitude). The cold diuresis is triggered by a decreased production of ADH.

A distinction is also made between water diuresis ( aquaresis ) and osmotic diuresis ( filtration diuresis ).

The German Nutrition Society (DGE) has published that although coffee has a short-term diuretic effect, it does not permanently dehydrate because the body counteracts it accordingly. Black tea also has no dehydrating effect. This habituation effect also occurs with some diuretics when given as long-term therapy.

The opposite of diuresis is antidiuresis through increased tubular reabsorption of the primary urine as a result of the action of the antidiuretic hormone (ADH).

See also

Web links

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

Individual evidence

  1. Lothar Ullrich (editor): Thiemes intensive care and anesthesia with DVD . Georg Thieme Verlag 2005, ISBN 9783131309105 , p. 553.
  2. Joachim Frey : Changes in the amount of urine. In: Ludwig Heilmeyer (ed.): Textbook of internal medicine. Springer-Verlag, Berlin / Göttingen / Heidelberg 1955; 2nd edition, ibid. 1961, pp. 905-910, here: p. 908.
  3. Coffee is better than its reputation: New results relieve the popular pick-me-up. On: Wissenschaft.de from April 5, 2005.
  4. Study: Coffee does not remove water from the body. ( Memento from January 27, 2007 in the Internet Archive )