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Updated: Jul 17, 2025

Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing
Published on: August 14, 2019
Assessment of lower urinary tract function in pediatrics using ultrasonography
Jun Ajiki1,2, Yasuyuki Naitoh3, Motohiro Kanazawa4
1Kyoto-Chubu Medical Center, Yagicho-Yagiueno 25, Nantan City, Kyoto, 629-0197, Japan. jun1120@koto.kpu-m.ac.jp.
Ultrasound is a safe, non-invasive tool for diagnosing pediatric lower urinary tract dysfunction (LUTD). Early detection using ultrasound, including post-voided residual urine (PVR) measurements, is crucial for preventing kidney damage.
Area of Science:
- Pediatric Urology
- Medical Imaging
Background:
- Ultrasound imaging is a non-invasive, radiation-free modality ideal for repeated examinations.
- It is the gold standard for diagnosing and managing pediatric urinary tract disorders, including lower urinary tract dysfunction (LUTD).
Purpose of the Study:
- To highlight the utility of ultrasound in pediatric urology for diagnosing LUTD.
- To emphasize key ultrasound parameters for bedside examinations and address challenges in measuring post-voided residual urine (PVR) in infants.
Main Methods:
- Bedside ultrasound examination focusing on PVR, bladder wall thickening, renal morphology, and rectal diameter.
- Recommended methods for PVR measurement in infants include a 4-hour voiding observation or an alarm system.
Main Results:
- Ultrasound effectively screens for underlying diseases and guides treatment strategies for LUTD.
- Specific focus on PVR, bladder wall, renal morphology, and rectal diameter is recommended.
Conclusions:
- Early diagnosis of LUTD via ultrasound is vital to prevent complications.
- Untreated LUTD can lead to renal deterioration, urinary leakage, and febrile urinary tract infections.
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