A study using dynamic scintigraphy with lasix (diuretic) on 59 patients with kidney issues such as hydronephrosis and kidney stones found that it helped identify urine retention and abnormalities in urine excretion. Surgical findings later confirmed that a lack of an excretory segment on the initial scintigram accurately detected urinary tract stenosis regardless of whether it appeared after lasix. Ureteropelvic stenosis could also be seen when the excretory segment was present initially but excretion time was prolonged, with time cutting in half after lasix.

1. Med Radiol (Mosk). 1991;36(9):41-6.
[Dynamic scintigraphy of the kidneys using lasix].
[Article in Russian]
Iudin LA, Reznichenko AA, Uskov IA, Gol'dman VE, Ivanova IuV, Naryshkina VM, Budkevich
IuB.
Abstract
Dynamic scintigraphy with lasix (urosemide) in 59 patients with hydronephrosis, nephrolithiasis, chronic
pyelonephritis, ureterohydronephrosis on an initial scintigram has shown retention of 99mTc-DTPA in the
urinary tracts: an increase or absence of the excretory segment on the activity-time curve up to the
appearance of an obstructive type of a curve. Verified operative findings in 19 patients with
hydronephrosis and nephrolithiasis have shown a high sensitivity and accuracy of the detection of
stenosis of the urinary tracts in the absence of the excretory segment on an initial scintigram irrespective
of the fact whether it appears or not on a scintigram after lasix administration. Stenosis of the
ureteropelvic segment can be observed in the presence of the excretory segment on an initial scintigram
with a prolonged half-period of RP excretion; its 2-fold decrease is noted on a scintigram after lasix
administration.
PMID:
1943585
[PubMed - indexed for MEDLINE]