Evaluation of rectosigmoid ratio and doppler ultrasound findings in children with functional constipation: a preliminary study.

PURPOSE: This preliminary study investigated the effectiveness of conventional ultrasound (US) and Doppler US in evaluating rectosigmoid ratio (R/S) and blood flow dynamics in children with functional constipation (FC).

METHODS

A total of 62 children aged 5-18 years were enrolled, including 32 patients with FC and 30 healthy controls. Rectal and sigmoid diameters, R/S ratio, and mesenteric blood flow parameters (PSV, PI, and RI) were assessed using standardized US and Doppler US techniques before and after a three-month treatment regimen including behavioral therapy and osmotic laxatives.

RESULTS

The R/S ratio significantly improved after treatment in the FC group (p = 0.036), while no significant changes were observed in mesenteric blood flow velocities or resistive indices. Patients with R/S ≥ 1 had significantly lower celiac artery PSV values compared to those with R/S < 1 (p = 0.009).

CONCLUSIONS

While Doppler US did not yield substantial clinical benefits in assessing intestinal blood flow in FC, the non-invasive evaluation of the R/S ratio proved useful in monitoring treatment response. This preliminary study suggests that rectosigmoid measurements may aid in patient management and calls for further research with larger cohorts.