Scintigraphy and Doppler ultrasonography for the evaluation of obstructive urinary calculi

Scintigraphy and Doppler ultrasonography for the evaluation of obstructive urinary calculi

Author Gandolpho, Lilian Autor UNIFESP Google Scholar
Sevillano, Marta Maite Autor UNIFESP Google Scholar
Barbieri, A. Autor UNIFESP Google Scholar
Ajzen, Sergio Aron Autor UNIFESP Google Scholar
Schor, Nestor Autor UNIFESP Google Scholar
Ortiz, Valdemar Autor UNIFESP Google Scholar
Heilberg, Ita Pfeferman Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Forty-seven patients with unilateral obstructive calculi (12 males and 35 females) were submitted to 99mTc-diethylene triamine pentaacetic acid (DTPA) or 99mTc-dimercaptosuccinic acid (DMSA) scans for assessment of renal function. The scans revealed unilateral functional deficit in 68 and 66% of the patients, respectively. A calculus size of 1.1 to 2.0 cm was significantly associated with deficit detected by DTPA, but duration of obstruction and calculus localization were not. After relief of the obstruction, the mean percent renal function of the affected kidney was found to be significantly increased from 25 ± 12% to 29 ± 12% in DTPA and from 21 ± 15% to 24 ± 12% in DMSA. Initial Doppler ultrasonography performed in 35 patients detected an increased resistive index in 10 (29%). In the remaining patients with a normal resistive index, ureteral urinary jet was observed, indicating partial obstruction. The high frequency of renal function impairment detected by DTPA and of tubulointerstitial damage detected by DMSA as well as the slight amelioration of unilateral renal function after relief of obstruction suggest that scintigraphy assessment may help evaluate the unilateral percentage of renal function and monitor renal function recovery when it occurs. The presence of a urinary jet detected by Doppler ultrasonography further indicates the severity of obstruction and the recovery prognosis.
Keywords urinary tract obstruction
obstructive calculi
DTPA and DMSA scans
resistive index
Doppler ultrasonography
Language English
Date 2001-06-01
Published in Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 34, n. 6, p. 745-751, 2001.
ISSN 0100-879X (Sherpa/Romeo, impact factor)
Publisher Associação Brasileira de Divulgação Científica
Extent 745-751
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000169443400007
SciELO ID S0100-879X2001000600007 (statistics in SciELO)

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