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Unilateral post-obstructive diuresis in the neonate.

T B Boone¹, T D Allen

¹Division of Urology, University of Texas Southwestern Medical Center, Dallas.

The Journal of Urology

|February 1, 1992

Summary

Severe post-obstructive diuresis in neonates after unilateral ureteral obstruction is rare. This condition requires intravenous supplementation until oral intake increases, highlighting unique neonatal renal physiology.

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Area of Science:

Pediatric Nephrology
Neonatal Urology

Background:

Unilateral ureteral obstruction can impact neonatal renal function.
Post-obstructive diuresis is a known, though uncommon, complication.

Observation:

Three neonates presented with severe post-obstructive diuresis following relief of unilateral ureteral obstruction.
Two neonates had normal contralateral kidneys; one had a dysplastic contralateral kidney.
Initial urinary output surpassed oral intake, requiring up to 10 days of intravenous fluid supplementation.

Findings:

Neonatal renal physiology contributes to the occurrence of unilateral post-obstructive diuresis.
Stabilization of fluid balance was achieved through increased oral intake, not a reduction in diuresis.

Implications:

This case series underscores the potential for severe diuresis in neonates with unilateral ureteral obstruction.
Understanding unique neonatal renal physiology is crucial for managing post-obstructive diuresis.

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