Does the Oral-Anal Transit Test Correlate with Colonic Manometry Findings in Children with Refractory Constipation?

OTT and CM are both valuable studies that assess different aspects of colonic function. OTT can be used as a screening test to rule out colonic inertia. However, the most proximal extent of remaining markers does not predict the anatomical extent of the manometric abnormality, particularly in isolated sigmoid dysfunction.