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.
Abstract

Related Concept Videos

Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
Imaging Studies I: Kidney, Ureter, and Bladder Studies01:28

Imaging Studies I: Kidney, Ureter, and Bladder Studies

Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...