Stepwise Therapy of Nocturnal Enuresis
An 8-year-old boy has wet the bed nearly every night since infancy and has never been dry for 6 consecutive months. He has no daytime wetting, no urgency, no history of urinary infection, and passes a strong stream. Urinalysis shows specific gravity 1.022 and no glucose, protein, nitrites or leukocyte esterase. He has never had structured advice about fluids or toileting. What is the most appropriate initial action?
- A.Structured behavioral and motivational therapyCorrect
- B.Enuresis alarm training every night
- C.Oral desmopressin taken at bedtime
- D.Renal and bladder ultrasound examination
Explanation
Treatment of monosymptomatic nocturnal enuresis follows a defined ladder, and the first rung in a child who has never received structured advice is behavioral and motivational therapy. This includes explaining the physiology to child and parents, ensuring adequate daytime fluid intake with restriction in the 2 hours before bed, avoiding caffeine, ensuring regular voiding including a bedtime void, treating constipation, waking the child to void before the parents retire, and using a reward chart tied to agreed behaviors rather than to dry nights. Removing blame and punishment is a therapeutic act in itself. If a structured trial of these measures fails, the alarm is the next step and offers the highest sustained cure rate because it conditions arousal to bladder filling, though it requires motivation and several weeks of consistent use. Oral desmopressin is the alternative when an alarm is unacceptable or when rapid, short-term dryness is needed, but relapse on stopping is common and hyponatremia is a real risk if fluid intake after the dose is not limited. Imaging is not indicated because the history is monosymptomatic and primary, growth and blood pressure are normal, and the urinalysis is unremarkable including a normal specific gravity that argues against a concentrating defect. Anticholinergics are added only when overactive bladder features are present, and tricyclic antidepressants are last-line because of cardiac toxicity in overdose.
Why each option
- A.
- Correct. Structured fluid, toileting, and reward-based advice is the first step for a child who has never had systematic conservative management.
- B.
- The alarm is the most effective second-line option but is offered after a structured trial of conservative measures has failed.
- C.
- Desmopressin gives rapid but often temporary benefit and is used when the alarm fails or is impractical, not as the first action.
- D.
- Imaging is unnecessary in primary monosymptomatic enuresis with normal growth, blood pressure, and urinalysis.
Reference: NICE Clinical Guideline CG111, Bedwetting in Under 19s, 2010
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