Anorectal manometry in active and quiescent ulcerative colitis

Area of Science:

• Gastroenterology
• Colorectal Research
• Bowel Function Studies

Background:

• Ulcerative colitis (UC) is a chronic inflammatory bowel disease affecting the colon and rectum.
• Anorectal dysfunction can significantly impact the quality of life for UC patients.

Purpose of the Study:

• To assess and compare anorectal function in patients with active UC, quiescent UC, and healthy controls.
• To investigate the relationship between rectal sensitivity, compliance, and disease activity in UC.

Main Methods:

• Anorectal manometry and balloon distention tests were performed on 11 active UC patients, 7 quiescent UC patients, and 18 healthy controls.
• Measurements included anal pressures, rectal sensation, critical volumes, and rectal compliance.

Main Results:

• No significant differences in anal resting or squeeze pressures, or balloon defecation ability were found between groups.
• Patients with active UC required significantly lower rectal distention volumes for sensation, critical volume, and contractility compared to controls and quiescent UC patients.
• Rectal compliance was significantly reduced in both active and quiescent UC groups.

Conclusions:

• Increased rectal sensitivity and contractility in active UC are likely due to mucosal inflammation and ulceration.
• Chronic rectal wall changes, including fibrosis and reduced compliance, may result from repeated inflammation in quiescent UC.
• Hypersensitive, hyperactive, and poorly compliant rectums may contribute to defecation frequency, urgency, and fecal incontinence in UC.