Related Experiment Video
Updated: May 11, 2026

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis
Published on: July 18, 2017
Late renal sequelae in intravenously treated complicated urinary tract infection
Christine Ferreiro1, Amy Piepsz, Cécile Nogarède
1Department of Pediatrics, Hospital Saint- Pierre, Université Libre de Bruxelles, Brussels, Belgium.
Insights
Complicated urinary tract infections (UTIs) in children treated with 7-day intravenous antibiotics showed infrequent late renal sequelae on technetium-99m dimercaptosuccinic acid (DMSA) scans. Further research is needed to confirm treatment efficacy.
Area of Science:
- Pediatric Nephrology
- Infectious Diseases
- Diagnostic Imaging
Background:
- Treatment for complicated pediatric urinary tract infections (UTIs) remains debated.
- Intravenous antimicrobial therapy is initiated, with duration guided by technetium-99m dimercaptosuccinic acid (DMSA) scintigraphy results.
Purpose of the Study:
- To retrospectively evaluate the frequency and significance of late renal sequelae.
- Assessed outcomes in children with abnormal acute DMSA findings treated intravenously for 7 days.
Main Methods:
- Retrospective review of medical charts for pediatric patients (2005-2008).
- Inclusion criteria: positive urine culture and evidence of complicated UTI.
- Analysis of early and late DMSA scintigraphy results.
Main Results:
- 144 patients (59%) had abnormal early DMSA; 98 (41%) had normal scans.
- Median IV treatment duration was 7 days for those with DMSA lesions, 5 days for others.
- Late renal sequelae occurred in 6% (4/65) of patients with abnormal early DMSA who had follow-up scans.
Conclusions:
- Late renal sequelae following complicated UTI treated with 7-day IV antibiotics were infrequent.
- The study suggests a low rate of sequelae, but the optimal treatment mode and duration require further investigation.
Background:
The treatment of complicated urinary tract infection in children is still a matter of debate. In our hospital, antimicrobial treatment is initiated intravenously, and the duration of this treatment is adapted according to the results of a Tc-99m dimercaptosuccinic acid (DMSA) scintigraphy.
Aim:
This study was conducted to evaluate retrospectively the frequency and the importance of late renal sequelae when treating intravenously for 7 days those patients with an abnormal acute DMSA.
Methods:
A review was conducted of the medical charts of all patients consecutively admitted between 2005 and 2008 with positive urine culture and clinical and biological evidence of complicated urinary tract infection (UTI).
Results:
There were 144 patients (59 %) with abnormal early DMSA scintigraphy and 98 (41 %) with normal scintigraphy. The median duration of intravenous treatment was 7.0 days in the children with DMSA lesions and 5.0 days in those without lesions. Obvious renal sequelae were observed on late DMSA scintigraphy in 4 (6 %) out of the 65 patients with an abnormal early DMSA who came back for control scintigraphy.
Conclusion:
Sequelae of acute DMSA lesions observed during complicated UTI treated 7 days intravenously were infrequent. Whether the mode and duration of antimicrobial treatment might explain the low rate of sequelae remains to be demonstrated.
Related Concept Videos
Urinary Tract Infection II: Pathophysiology
Kidney Transplant II: Surgical Procedure
Acute Kidney Injury II: Pathophysiology
Urinary Tract Infection I: Introduction
Acute Pyelonephritis I: Introduction
Acute Pyelonephritis II: Diagnostic Studies and Management

