Smooth muscle sphincteroplasty in colostomy

Area of Science:

• Colorectal surgery
• Surgical innovation
• Gastrointestinal function

Background:

• Abdominoperineal extirpation for rectal cancer often necessitates colostomy.
• Controlling colostomy function and improving patient quality of life remain significant challenges.
• Schmidt's concept of smooth muscle sphincteroplasty offers a potential solution for enhanced colostomy management.

Purpose of the Study:

• To evaluate the efficacy of a modified smooth muscle sphincteroplasty combined with colon irrigations.
• To analyze the impact on patients with lower quadrant colostomy after abdominoperineal extirpation.
• To assess functional and anatomical outcomes of the modified procedure.

Main Methods:

• A modified smooth muscle wrap using a 4-cm colon segment graft was applied to 72 patients.
• Intraluminal pressure, manometry, electromyography, and histomorphology were used to assess the graft.
• Colostomy function was evaluated by recording spontaneous and directed defecations, compared to 20 controls.

Main Results:

• Patients with modified sphincteroplasty showed significantly increased basal intraluminal pressure (29.7 mmHg, up to 43 mmHg post-dilatation, P < 0.001).
• Weekly spontaneous stools were 3 to 5 times less frequent compared to controls (P < 0.001).
• The procedure demonstrated operative-technical feasibility for increasing precolostomy segment pressure.

Conclusions:

• Modified smooth muscle sphincteroplasty enhances intraluminal pressure in the precolostomy segment.
• Combining this technique with colonic irrigations improves control over evacuatory rhythm.
• This approach significantly benefits colostomy patients by reducing spontaneous stools and improving quality of life.