Summary
The effects of obstructive uropathy on renal function are the consequence of a variety of factors with complex interactions. Obstruction of the urinary tract decreases glomerular filtration rate (GFR) and renal plasma flow, and modifies tubular function. The decrease in GFR and plasma flow is mediated, in part, by the vasoconstrictors angiotensin II and thromboxane A2.
A significant infiltration of leukocytes occurs in the kidney following obstruction; furthermore, by abolishing this infiltrate the renal function of the post-obstructed kidney is significantly improved. This indicates that leukocytes have an important role in modulating renal hemodynamics after release of obstruction, whose pathophysiology must now be considered to include an immunological component. Further work is required to define the mechanisms whereby macrophages can influence renal function and to define how the kidney can recruit these cells in such large numbers following obstruction.
Abnormalities in renal tubule function are common in urinary tract obstruction. The major alterations appear to be located in distal segments of the nephron. There is decreased ability to concentrate the urine, the reabsorption of sodium and water is altered, and the secretion of hydrogen and potassium is impaired.
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References
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© 1991 Springer Japan
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Klahr, S. (1991). Pathophysiology of Obstructive Nephropathy. In: Hatano, M. (eds) Nephrology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-35158-1_5
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DOI: https://doi.org/10.1007/978-3-662-35158-1_5
Publisher Name: Springer, Berlin, Heidelberg
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