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Diuretic radionuclide renography in upper urinary tract obstruction
The Australian and New Zealand Journal of Surgery
|June 1, 1982
Summary
Diuretic renography effectively identifies urinary tract obstruction in children. However, results may be less reliable with poor kidney function or complex conditions like duplex kidneys.
Area of Science:
- Pediatric Nephrology
- Diagnostic Imaging
- Urology
Background:
- Urinary tract dilatation requires accurate differentiation between obstruction and non-obstruction.
- Diuretic renography is a common imaging technique for evaluating the pediatric urinary tract.
Purpose of the Study:
- To assess the accuracy of diuretic renography in differentiating obstructive from non-obstructive dilatation in pediatric uretero-renal units (URU).
Main Methods:
- Diuretic renography utilizing radioiodine sodium hippurate and a frusemide stimulus.
- Data acquisition via gamma camera interfaced with a computer.
- Study included 67 uretero-renal units in 33 pediatric patients.
Main Results:
- The renogram correctly identified obstruction in 18 URU and non-obstruction in 49 URU.
- Five false positive and two false negative results were observed.
- False results were associated with impaired renal function, duplex kidneys, or severe reflux.
Conclusions:
- Diuretic renography is valuable for investigating equivocal upper urinary tract obstruction in children.
- The technique's reliability may be compromised in cases of inadequate renal function or complex anatomical variations.