[Clinico-echographic parallels in patients with pyelonephritis and exacerbated chronic kidney failure].

24 patients with chronic renal failure due to chronic pyelonephritis were studied prospectively. In 18 of them (51%) the deterioration of the renal function was caused by obstruction, urinary infection, dehydration, etc. In 13 patients with chronic renal failure in exacerbation there were clinical data for activation of the pyelonephritis which was followed up dynamically.