Secondary ureterohydronephrosis did not statistically influence (using the Chi-square test) the frequency of fever in any of the studied groups.
Future studies on larger numbers of patients are needed to identify risk groups depending on the location of the calculi and secondary ureterohydronephrosis.
% 48 32.65% 99 67.35% Calculus size 0.6-0.8 cm 24 38.71% 38 61.29% 0.9-1.2 cm 20 29.41% 48 70.59% >1.2 cm 4 23.53% 13 76.47% Secondary ureterohydronephrosis First degree 29 35.80% 52 64.20% Second degree 17 35.42% 31 65.58% Third degree 2 11.11% 16 88.89% Calculus location Pelvic 17 23.61% 55 76.39% Iliac 8 61.54% 5 38.46% Lumbar 23 37.10% 39 62.90% Group 2 (without prophylaxis) Febrile Afebrile No.
However, the reports devoted to the morphological investigation of the ureters in ureterohydronephrosis are scant (Khem and Kormak, 1983; Ross, Romrell and Kaye, 2003).
The comparative investigations of the structure of different parts of the ureters with use of scanning electronic microscopy in children were not carries out in the obstructive ureterohydronephrosis. Causes that determine a dilated ureter compared to the rest of the urinary tract are still partly unknown.
The above-mentioned seems to be good reasons for performance of comparative investigations of various parts of ureters in the patients with obstructive ureterohydronephrosis with use of scanning electronic microscopy.
The samples for scanning electronic microscopy were taken from tissue of the proximal and distal parts of ureters in obstructive ureterohydronephrosis (totally 11 samples) during operative intervention, fixed in the 2.5% solution of glutaric aldehyde on the phosphate and cacodylate buffer, finished fixing with 1% solution of the osmium tetraoxide after dehydration in the alcohol-acetone, then dried with method of critical point in the apparatus HCP-2 and were pulverized with the gold in the apparatus IB-2.
We were performed comparative investigations with use of SEM on the walls of the ureters at the different levels in the obstructive form of ureterohydronephrosis.
In the obstructive ureterohydronephrosis SEM investigations in the area of obstruction revealed the connective tissue vegetations, presented mainly, by fiber component (Figure 1).
The morphological investigations of the distal and proximal parts of the ureters in the obstructive ureterohydronephrosis performed with use of scanning electronic microscopy allowed identification of the significant differences in the ultrastructure status of the appropriate part of the ureter and in these pathologies.