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A crossover study comparing delayed radiohippurate images with furosemide renograms
Diagnostic Imaging
|January 1, 1983
Summary
Diuretic renography and delayed imaging for urinary tract obstruction showed agreement in most patients. Diuretic renography offered a faster examination time but had higher false positive and negative rates.
Area of Science:
- Nuclear medicine
- Urology
- Radiology
Background:
- Urinary tract obstruction diagnosis often requires imaging.
- Radionuclide renography is a key diagnostic tool.
Purpose of the Study:
- To compare the diagnostic accuracy of diuretic renography versus nondiuretic delayed imaging for urinary tract obstruction.
- To evaluate the time efficiency of diuretic renography.
Main Methods:
- Prospective study of 109 kidneys in 56 adult patients.
- 131I-hippurate renography with a 2-hour delayed image.
- Diuretic renography using furosemide and 131I-hippurate over 30 minutes.
Main Results:
- High agreement between delayed imaging and diuretic renography (85.7%) for obstruction presence/absence.
- Diuretic renography showed 6 false positives and 4 false-negatives.
- Nondiuretic delayed imaging had 1 false positive and no false-negatives.
- Diuretic renography reduced examination time from 2 hours to 30 minutes.
Conclusions:
- Diuretic renography is a faster alternative to delayed imaging for evaluating urinary tract obstruction.
- Nondiuretic delayed imaging demonstrated higher accuracy in this study.
- Further investigation may be needed to optimize diuretic renography protocols.