Is rectal disimpact always necessary in children with chronic constipation? Evaluation with pelvic ultrasound

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Abstract
The aim of study was to evaluate if pelvic ultrasound can be useful in managing children with chronic idiopathic constipation. A total of 270 children with idiopathic chronic constipation were enrolled in the study. At baseline and at monthly checkups children were evaluated by clinical score and pelvic ultrasound (US). Patients have been divided in 2 groups, based on pelvic US results: group A with a rectal diameter >3 cm, group B with a rectal diameter <3 cm or rectum not visualized. Both groups were subsequently randomly divided in two subgroups (A1, A2, B1, B2) on the basis of the prescribed treatment (disimpaction for the first week and daily laxative or only daily laxative). After 1 month of therapy all clinical features improved in group A1 and at pelvic US, rectal size reduced and became not visualized; group A2 showed poor clinical response and transverse diameter of rectum did not modify significantly; B1 and B2 groups showed significant improvement only after 2–3 months. Rectal disimpaction is necessary only in presence of MR. Pelvic US is a useful to diagnose MR and to set up the most appropriate treatment protocol for different chronic constipation cases.

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