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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