Vande Walle recommends managing a pediatric patient with enuresis using the data from the patient diary. The authors are from Ghent University Hospital, Aarhus University Hospital, Boston Children's Hospital and University Children's Hospital Kiel.
Patient selection: pediatric from 5 to 18 with enuresis
Parameters:
(1) expected bladder capacity for age in mL
(2) maximum voided volume in mL (MVV, as approximates bladder capacity)
(3) total nocturnal volume in mL (TNV)
Age of the Patient
Expected Bladder Capacity (EBC)
5 to 12 years
(30 * (age in years)) + 30
>= 12 years
390 mL
maximum voided volume to expected bladder capacity ratio =
= (maximum voided volume) / (EBC)
total nocturnal volume to expected bladder capacity ratio =
= (total urine volume) / (EBC)
Interpretation:
• A reduced bladder capacity is indicated by an MVV/EBC < 0.65.
• Polyuria is indicated by TNV/EBC > 1.3.
Bladder Capacity
Urine Output
Recommendation
reduced
normal
alarm
normal
normal
either alarm or desmopressin
normal
nocturnal polyuria
desmopressin
reduced
noctural polyuria
alarm and desmopressin
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