Transverse Rectal Diameter: Predictor of Severity in Children With Chronic Functional Constipation

Area of Science:

• Pediatric Gastroenterology
• Medical Imaging
• Clinical Diagnostics

Background:

• Chronic functional constipation (CFC) is a common pediatric condition.
• Accurate assessment of severity and treatment response is crucial for effective management.
• Transverse rectal diameter (TRD) is being investigated as a potential diagnostic marker.

Purpose of the Study:

• To evaluate transverse rectal diameter (TRD) as a predictor of clinical severity in children with chronic functional constipation (CFC).
• To assess TRD's utility in monitoring response to conventional treatment for pediatric CFC.
• To explore the correlation between TRD and other ultrasound parameters with clinical outcomes.

Main Methods:

• A longitudinal prospective study involving 105 children (aged 4-17) diagnosed with CFC.
• Utilized Constipation Scoring System (CSS) and pelvic ultrasound (measuring TRD, wall thickness [WT], detrusor thickness [DT]).
• Follow-up assessments at 2, 4, and 6 months; high-resolution anorectal manometry (HR-ARM) for non-responders.

Main Results:

• Children with megarectum (TRD ≥ 3 cm) exhibited higher CSS scores and longer constipation duration.
• TRD positively correlated with age and CSS scores.
• Significant reductions in TRD and WT were observed post-treatment, with persistent dilation suggesting potential dyssynergia.

Conclusions:

• Pelvic ultrasound measurement of TRD is a reliable, noninvasive marker for assessing pediatric CFC severity and treatment response.
• Persistent rectal dilation may indicate underlying defecatory dyssynergia, guiding further diagnostic evaluation.
• Integrating TRD into routine practice can enhance personalized, outpatient care for pediatric constipation.