Paeds Vivas · nephrology-urology-fluids-and-electrolytes
Nocturnal enuresis — branching viva
Branching viva from the definition and classification of paediatric nocturnal enuresis, through the three-systems pathophysiology, the alarm and desmopressin first-line therapy with exact doses and the fluid-restriction safety rule, the partial responder and combination therapy, and the red flags of non-monosymptomatic and organic disease.
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Study tools
Target exams
RACP General PaediatricsRACP DCEMRCPCH ClinicalRCPSC Pediatrics
Prompt
You are the paediatric registrar in a general clinic. The consultant asks you to talk through four children: a 7-year-old with monosymptomatic bedwetting and a positive family history, a 9-year-old who needs dryness for an upcoming school camp, a 6-year-old whose bedwetting comes with daytime urgency and holding, and an 8-year-old with new polyuria, polydipsia and weight loss.
Station opening
Examiner: "Define nocturnal enuresis and classify it for me." [1]
Strong candidate (must-hit)
- Defines nocturnal enuresis as intermittent involuntary voiding during sleep in a child aged five years or older, per the International Children's Continence Society, and splits it first into monosymptomatic (no daytime lower urinary tract symptoms) versus non-monosymptomatic (daytime symptoms present), then into primary (never dry for six months) versus secondary (relapse after at least six months of dryness); explains that the daytime history is the first branch because it decides whether the child flows to alarm or desmopressin or to daytime evaluation first. [1]
Weak candidate
- "It is when a child wets the bed; I would just call it bedwetting and treat it." [1]
References6ShowHide
- [1]Nevéus T; Fonseca E; Franco I; et al Management and treatment of nocturnal enuresis-an updated standardization document from the International Children's Continence Society. J Pediatr Urol, 2020.PMID 32278657
- [3]Kuwertz-Bröking E; von Gontard A Clinical management of nocturnal enuresis. Pediatr Nephrol, 2018.PMID 28828529
- [4]Hahn D; Stewart F; Raman G Desmopressin for nocturnal enuresis in children. Cochrane Database Syst Rev, 2025.PMID 40728007
- [5]Glazener CM; Evans JH; Peto RE Alarm interventions for nocturnal enuresis in children. Cochrane Database Syst Rev, 2005.PMID 15846643
- [7]Caldwell PH; Sureshkumar P; Wong WC Tricyclic and related drugs for nocturnal enuresis in children. Cochrane Database Syst Rev, 2016.PMID 26789925
- [11]Chen X; Zeng F; Tian N; et al Efficacy and safety of first-line therapies and first-line-based combination therapies for monosymptomatic nocturnal enuresis in children: a network meta-analysis. Pediatr Nephrol, 2026.PMID 41902910