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Box 1 Nephrological assessment at each consultation

From: Management of patients with posterior urethral valves “from the fetus to adolescence”: French national diagnostic and care protocol (NDCP)

Weight

Size

Blood pressure

Blood test: chemistry and bicarbonates, BUN and creatinine (± serum cystatin C) with estimation of GFR by simplified or composite Schwartz formula (before 15 years)

Phosphocalcium balance

Proteinuria, microalbuminuria and creatininuria on one voiding once a year after toilet training