Objectives: To investigate correlation between rectal wall thickness (RWT) and anorectal pressures, in obstructed defecation syndrome (ODS) patients caused by internal rectal prolapse.
Methods: ODS patients and healthy volunteers (HVs) underwent 3D endorectal ultrasound (3D-EUS) and high-resolution anorectal manometry (HRAM); RWT, total rectal wall volume (TRWV), pushing endorectal pressure (PEP), recto-anal gradient were determined RESULTS: We enrolled 35 ODS patients and 25 HVs. Patients showed markedly decreased TRWV, PEP, and recto-anal gradient. Linear correlation was found between markedly reduced TRWV and markedly hypotonic PEP.
Conclusions: HRAM and 3D-EUS could be performed in ODS assessment, to better understand rectal function.