| Author/Editor | Kmetec, Andrej | |
| Title | Ultrazvok v klinični diagnostiki obstrukcije sečil | |
| Type | monografija | |
| Place | Ljubljana | |
| Publisher | Medicinska fakulteta | |
| Publication year | 1999 | |
| Volume | str. 72 | |
| Language | slo | |
| Abstract | Objectives. Urinary tract obstruction is a serious disturbance impairing the patient's renal function. The aim of the study was to determine whether Doppler sonography with measurement of resistive index (RI) values can replace or supplement standard, yet more invasive procedures in the diagnosis of obstructive and nonobstructive urinary tract dilatation. Methods. A total of 105 patients with obstruction and dilatation of the urinary tract, and 10 control subjects were studied prospectively using Doppler sonography and calculations of RI values. The patients were divided into four groups as follows: group 1- patients with acute renal colic pain and unilateral obstruction confirmed by urography; group 2 - patients with chronic obstruction and dilatation of more than one year's duration confirmed by radionuclide studies, group 3 - patients with sonographically confirmed mild dilatation of the transplanted kidney collecting system, and group 4 - patients with recurrent urinary tract infections and vesicoureteral reflux confirmed by echo-enhanced micturition ultrasound and radionuclide voiding cystography. In the control group, urinary tract dilatation was ruled out by ultrasound. Results. The mean RI of intrarenal arteries (renal, segmental, arcuate) of acutely obstructed and healthy kidneys was 0.713 (+-0.056) and 0.597 (+-0.56), respectively, the difference between the two being statistically significant. With the difference between RI values of 0.10 at mean RI value, the sensitivity was 87.1 % and specifcity 90%. In patients with chronic dilatation of the renal collecting system, the RI values do not exceed the discriminatory value of 0.70, the difference between the dilated and normal kidneys being statistically significant. For the optimal difference of 0.05, the sensitivity was 61.5% and the specificity 90%. (Abstract truncated at 2000 characters.) | |
| Descriptors | URINARY RETENTION KIDNEY TRANSPLANTATION VESICO-URETERAL REFLUX RENAL ARTERY URINARY TRACT INFECTIONS ULTRASONOGRAPHY, DOPPLER BLOOD FLOW VELOCITY SENSITIVITY AND SPECIFICITY |