Potential causes of the preoperative increase in the rectosigmoid cyclic motor pattern: A high-resolution manometry...

Area of Science:

• Gastroenterology
• Colorectal Surgery
• Physiology

Background:

• Cyclic motor patterns (CMPs) are the predominant motor activity in the distal colon.
• Understanding colonic motor patterns is crucial for managing gastrointestinal function, especially around surgical procedures.

Purpose of the Study:

• To quantify distal colonic motor activity trends before elective colonic surgery.
• To assess the impact of a preoperative carbohydrate load on colonic motor patterns.
• To compare these changes with the colonic meal response in healthy individuals.

Main Methods:

• High-resolution (HR) colonic manometry with 36 sensors was employed.
• 10 adult patients undergoing elective colonic surgery and 9 healthy volunteers participated.
• CMPs were defined as propagating contractions at 2-4 cycles per minute (cpm).

Main Results:

• CMPs significantly increased as surgery approached (p=0.001).
• A preoperative carbohydrate drink enhanced CMP occurrence (p=0.04) and propagation distance (p=0.04).
• The effect of the drink mimicked a colonic meal response despite lower caloric content.

Conclusions:

• Distal colonic CMPs increase preoperatively and are further stimulated by carbohydrate intake.
• Preoperative anxiety may contribute to the observed increase in colonic motor activity.