Optimizing postnatal management based on prenatal UTD grading: a 5-year follow-up study of fetal hydronephrosis in a large Chinese cohort
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View abstract on PubMed
Summary
This summary is machine-generated.Most fetal hydronephrosis (FH) cases resolve spontaneously. The Urinary Tract Dilation (UTD) classification system effectively identifies high-risk infants, guiding management and reducing unnecessary interventions for low-risk cases.
Area Of Science
- Pediatric Nephrology
- Prenatal Diagnosis
- Medical Imaging
Background
- Fetal hydronephrosis (FH) is a common prenatal finding requiring careful postnatal evaluation.
- Predicting the natural history and identifying prognostic factors for FH is crucial for optimizing management.
- The Urinary Tract Dilation (UTD) classification system aims to standardize risk stratification for FH.
Purpose Of The Study
- To investigate the long-term natural history of fetal hydronephrosis in a Chinese population.
- To identify key prognostic factors influencing FH outcomes.
- To optimize postnatal management strategies using the UTD classification system.
Main Methods
- A hybrid retrospective-prospective cohort study of 49,097 pregnant women, with 2,263 fetuses diagnosed with FH, followed for 5 years.
- Analysis of prenatal ultrasound parameters including anteroposterior renal pelvic diameter (APD) and A/R ratio.
- Stratification of cases into UTD A1 (low-risk) and UTD A2-3 (high-risk) groups for comparative analysis.
Main Results
- The incidence of FH was 4.61%, with 97.39% resolving spontaneously by 5 years.
- Only 0.75% of cases required surgery, all within the UTD A2-3 group.
- Left renal APD and A/R ratio were independent predictors for surgery; UTD A2-3 group showed significantly higher risks of postnatal complications.
Conclusions
- The majority of fetal hydronephrosis cases resolve spontaneously, necessitating conservative management for low-risk infants.
- The UTD classification system effectively stratifies postnatal risk, guiding clinical decisions.
- APD and A/R ratio are critical imaging predictors for surgical intervention in FH.
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