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Updated: Jun 22, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Published on: October 12, 2017

Fetal lower urinary tract obstruction.

Serena Wu¹, Mark Paul Johnson

¹General Surgery, The Center for Fetal Diagnosis and Treatment, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA.

Clinics in Perinatology

|June 30, 2009

Summary

This summary is machine-generated.

Prenatal diagnosis and intervention for lower urinary tract obstruction can prevent irreversible kidney damage. While shunting improves survival, managing long-term complications remains crucial for fetal health.

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Continuous Telemetric In Utero Tracheal Pressure Measurements in Fetal Lambs

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Continuous Telemetric In Utero Tracheal Pressure Measurements in Fetal Lambs

Continuous Telemetric In Utero Tracheal Pressure Measurements in Fetal Lambs

Published on: December 22, 2023

Area of Science:

Perinatology and Fetal Medicine
Pediatric Urology
Developmental Nephrology

Background:

Lower urinary tract obstruction (LUTO) is a significant cause of congenital renal disease.
Early experimental models demonstrated that relieving in utero obstruction prevents renal fibrocystic dysplasia.
Understanding the relationship between obstruction and renal damage is critical for fetal intervention.

Purpose of the Study:

To provide a comprehensive overview of prenatal diagnosis and management of LUTO.
To review the evolution of antenatal interventions for LUTO.
To discuss strategies for selecting candidates for in utero therapy.

Main Methods:

Review of early experimental models linking urinary tract obstruction to renal fibrocystic dysplasia.
Analysis of fetal urine electrolyte and protein concentrations in human cases.
Development of an algorithm for selecting candidates for antenatal therapy based on prognostic values.

Main Results:

Confirmation of the link between urinary tract obstruction and irreversible renal injury.
Establishment of prognostic threshold values using fetal urine analysis.
Development of criteria for selecting fetuses eligible for antenatal intervention.

Conclusions:

Antenatal intervention for LUTO can prevent severe renal damage.
Fetal urine analysis provides crucial prognostic information for guiding therapy.
Despite improved survival with shunting, long-term morbidities necessitate ongoing management strategies.