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We've curated a database of terms and conditions related to pediatric urology to help everyone learn more about the field.
Renal scans and the administration of a diuretic are used to diagnose urinary tract obstruction, beginning from 6 to 8 weeks of age.
- Assesses differential renal function (DRF) in each kidney.
- Measures the drainage time (washout) from the renal pelvis.
The state of hydration of the infant and the timing of the diuretic administration affect the accuracy of the diuretic renogram.
The preferred radioisotope is technetium-99m mercaptoacetyltriglycine (Tc-99m MAG3)
Washout time greater than 20 minutes indicates an impairment of urine outflow from the pelvis.
The difference in split function (DFR) of less than 40% in a single kidney and/or 10% decrease in DRF compared to the previous diuretic renograms indicate an obstructive pattern