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19–22 APRIL, 2017, BARCELONA, SPAIN
15:26–15:29
S17-9 (PP)
X-RAY STRUCTURAL MARKERS OF THE URETER
WITH DIFFERENT PERISTALTIC ACTIVITY IN CHILDREN
WITH CONGENITAL NONREFLUXING MEGAURETER
Liudmila DERYUGINA
Saratov State Medical University, Pediatric Surgical Department, Saratov, RUSSIAN FEDERATION
PURPOSE
One of the factors defining the severity of urodynamic disorders in CNMU is contractile activity of the
ureter.The aim of the study was to determine x-ray features of the ureters with varying contractile
function in CNMU in children.
MATERIAL AND METHODS
47 children with CNMU at the age М=7 months underwent x-ray examination. The frequency of
contractions of the ureter were registered by ultrasonic uretrrometry in 1 min before and after diu-
retic stimulation ( furosemide 0.5 mg/kg ). The results of ultrasonic ureterometry allowed to identify
a group of patients with low contractile function of the ureter (the average frequency 0-3,5per min)
and the group with normal contractile function (frequency of contractions 4-7,6 per min). To assess
x-ray features of the CNMU “ureteral index (UI)” is proposed. UI is determined by calculating the
relationship of the transverse dimension of the most advanced segment of the ureter to its length
from pyeloureteral to ureterovesical segment with consideration of the curves according x-ray.
RESULTS
UI was varied in the range 0.04-0,325 and correlated with the average frequency of contractions
of the ureter (n=47, r=of 0.7250, p<0,000003). Ureters with low contractility was distinguished by
pronounced extension and the minimum number of bends, accompanied by high values of UI
(Me=0,21; LQ=0,21; UQ=0,27). A significant predominance of length over width is different from the
ureters with normal contractile function, which was accompanied by a low UI (Me=0,12; LQ=0,1;
UQ=0,15). The differences between the groups at the “ureteric index” is statisical significant (
p=0,000001). Receiver Operating Characteristic statistic test(ROC) has allowed to establish that
the values of UI 0,19 more from 87.5% sensitivity and 92% specificity characteristic of the ureters
with a low contractility(AUC=0,985±0,016).
CONCLUSIONS
X-ray UI reflects the functional state of the ureter in children with CNMU that will base the choice of
tactics of treatment and prognosis.
15:29–15:40
Discussion