Anorectal dysfunction in patients with ulcerative colitis: impaired adaptation or enhanced perception?

Area of Science:

• Gastroenterology
• Colorectal Surgery
• Physiology

Background:

• Ulcerative colitis (UC) significantly impacts quality of life due to rectal disorders.
• These issues may stem from impaired rectal perception and compliance.
• Assessing anorectal function is crucial for managing mild-to-moderate UC.

Purpose of the Study:

• To evaluate anorectal function in patients with mild-to-moderate ulcerative colitis.
• To compare rectal and anal function between UC patients and healthy volunteers.

Main Methods:

• Prospective comparison of anal pressures and rectal responses to isobaric distension.
• 10 patients with mild-to-moderate UC were compared with 10 healthy volunteers (HVs).

Main Results:

• UC patients exhibited lower squeeze pressures in the lower anal canal compared to HVs.
• Rectal sensitivity remained similar between groups during distension.
• UC patients showed impaired rectoanal inhibitory reflex, reduced rectal tone, and decreased rectal compliance.

Conclusions:

• Mild-to-moderate UC is associated with rectal compliance and innervation disorders.
• Rectal sensitivity is not significantly altered in these patients.
• Findings suggest compromised rectal wall properties and intrinsic innervation, warranting further longitudinal study.