Isosthenuria

Classification according to ICD-10
N19	Unspecified renal insufficiency
ICD-10 online (WHO version 2019)

Isosthenuria (from Greek ίσος “equal” and σθένος “strength”, German also urinary rigidity ) denotes (since Franz Volhard ) in nephrology the loss of any ability to concentrate or dilute the kidneys in the context of chronic kidney failure and thus a rigid urine concentration . As a result, the original filtrate remains unchanged with a fixed density of 1.010 g / ml. This value corresponds to that of protein-free plasma . This value remains the same regardless of the amount of liquid supplied from the outside.

Irrespective of renal insufficiency, isosthenuria can also occur in the context of sickle cell anemia .

See also

• Hyposthenuria

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, here: pp. 909 f.

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