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Table 1 Prognostic criteria using fetal urine [25]

From: Fetal Lower Urinary Tract Obstruction (LUTO): a practical review for providers

Urinary component

Favorable

Sodium (Na)

Less than 100 mEq per liter

Chloride (Cl)

Less than 90 mEq per liter

Osmolarity (Osm)

Less than 210 mEq per liter

Calcium (Ca)

Less than 2 mmol per liter

Beta-2 microglobulin

Less than 2 mg per liter