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[Fetal genitourinary abnormalities associated with oligohydramnios]

K Shimada1, S Hosokawa, K Sakaue

  • 1Division of Urology, Osaka Medical Center and Research Institute for Maternal and Child Health.

Nihon Hinyokika Gakkai Zasshi. the Japanese Journal of Urology
|June 1, 1994
PubMed
Summary

Severe oligohydramnios in fetuses, often linked to urinary tract issues, can have fatal outcomes. However, some infants with specific urological conditions can survive with timely intervention, though long-term kidney function monitoring is crucial.

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Area of Science:

  • Perinatology
  • Pediatric Urology
  • Neonatology

Background:

  • Oligohydramnios, particularly when starting in the second trimester, is associated with severe renal dysfunction and historically poor fetal outcomes.
  • Amniotic fluid volume is critical for fetal development, especially pulmonary maturation.

Purpose of the Study:

  • To analyze urological disorders, gestational age at presentation, and outcomes in fetuses with severe oligohydramnios.
  • To investigate the clinical course and prognosis of surviving infants.

Main Methods:

  • Retrospective analysis of 45 fetuses diagnosed with severe oligohydramnios.
  • Review of clinical data and autopsy findings.
  • Detailed examination of 7 surviving patients' clinical courses and outcomes.

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Main Results:

  • Common diagnoses included renal hypodysplasia, urethral atresia, and posterior urethral valve.
  • Severe oligohydramnios was detected around 30 weeks gestation, but as early as 16 weeks in some cases.
  • Surviving patients (n=7) had conditions like posterior urethral valve and hydrometrocolpos, with oligohydramnios presenting in the third trimester. Pulmonary hypoplasia was not evident in survivors.

Conclusions:

  • While severe oligohydramnios often indicates poor renal function and fatal outcomes, specific urological interventions can lead to survival.
  • Survivors require prompt postnatal urological management and ongoing monitoring for renal function, as some develop end-stage renal failure or elevated creatinine levels.