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Is omitting post urinary-tract-infection renal ultrasound safe after normal antenatal ultrasound? An observational
Dan Miron1, Ahmed Daas, Waheeb Sakran
1Pediatric Department A, HaEmek Medical Center, Afula, Israel. miron_da@clalit.org.il
Insights
Renal ultrasonograms (RUS) after a first urinary tract infection (UTI) in children show high concordance with prenatal scans. Omitting post-UTI RUS may be considered for children with normal antenatal findings, as post-infection anomalies often have negligible impact.
Area of Science:
- Pediatric Nephrology
- Diagnostic Imaging
- Infectious Diseases
Background:
- Current guidelines recommend renal ultrasonograms (RUS) for young children following a first urinary tract infection (UTI).
- This practice aims to detect potential renal abnormalities.
- The necessity of post-UTI RUS when prenatal imaging is available requires evaluation.
Purpose of the Study:
- To evaluate the concordance between prenatal and post-urinary tract infection (UTI) renal ultrasonogram (RUS) findings in children under five.
- To determine if prenatal RUS can reliably predict post-infection RUS results.
- To assess the clinical significance of renal anomalies identified only after a UTI.
Main Methods:
- A prospective study included 250 children aged 5 years or younger hospitalized with their first simple UTI.
- Prenatal and post-UTI RUS data were collected for eligible participants.
- Concordance rates and predictive values were calculated.
Main Results:
- Complete concordance between prenatal and post-UTI RUS was observed in 96% of 209 children with available data.
- The predictive value of a normal antenatal RUS for a normal post-UTI RUS was 96%.
- Renal anomalies identified solely on post-UTI RUS had a negligible impact on management in eight children.
Conclusions:
- Prenatal RUS demonstrates high concordance with post-UTI RUS in children under five.
- Findings exclusively on post-UTI RUS typically do not alter patient management.
- Consideration can be given to omitting post-UTI RUS in children with normal antenatal RUS findings.
Background:
Guidelines recommend obtaining a renal ultrasonogram (RUS) for young children after a first urinary tract infection (UTI).
Objective:
The aim of the current study was to assess the concordance of prenatal and post-UTI RUS findings in children with a first simple UTI.
Methods:
This was a prospective study and included all children aged 5 years or younger who were hospitalised with a first simple UTI (determined as clinical response and normalisation of temperature within 48 h on initiation of antibacterial therapy with no complications). Data were collected from each child regarding the results of prenatal and post-UTI RUS.
Results:
Overall, 250 children were included in the study and the results of late-pregnancy and post-UTI RUS were available for 84% (n = 209). Complete concordance between the two RUS was demonstrated in 96% (n = 201). The predictive value of normal antenatal to normal post-UTI RUS was 96% (95% CI: 93% to 99%). These results include four children with mild transient pelvic dilatation. In eight children in whom renal anomalies were demonstrated only in post-UTI RUS, the influence of these anomalies on the children's management was negligible.
Conclusions:
Prenatal-RUS have been performed in most children <5 years old hospitalised with a first simple UTI. Concordance with post-infection tests is very high. Findings which appear only in post-infectious RUS usually have negligible effects on children's management. Thus, in such children with normal antenatal RUS omitting post-UTI RUS could be considered.
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