A New Appendicostomy Technique to Prevent Stomal Stenosis

Area of Science:

• Surgical innovation
• Gastroenterology
• Urology

Background:

• Stomal stenosis is a common complication after Malone antegrade continence enema (MACE) and Mitrofanoff appendicostomy, occurring in 12-45% of patients.
• The standard technique involves excising the distal appendix, potentially compromising blood supply and leading to stenosis.

Purpose of the Study:

• To evaluate a novel appendicostomy technique that preserves the appendiceal tip and vasculature.
• To determine if this new technique decreases the incidence of stomal stenosis compared to the standard method.

Main Methods:

• Retrospective evaluation of 123 patients who underwent appendicostomy for MACE or urinary diversion with at least 1 year of follow-up.
• Comparison of stomal stenosis rates between the standard technique (distal appendix excision) and the new technique (distal tip and vessel preservation).
• Cox proportional hazards analysis to identify associated covariates.

Main Results:

• The standard technique had a stenosis incidence of 13% (12/93 patients) over a median follow-up of 9.4 years, with 75% of cases occurring within 1 year.
• No stomal stenosis was observed in 30 patients who underwent the new technique, with a median follow-up of 3.3 years.
• The surgical technique (standard vs. new) was significantly associated with the occurrence of stenosis (p=0.04).

Conclusions:

• Preserving the distal appendiceal vasculature and tip, and utilizing a more proximal lumen opening, can lessen stomal stenosis.
• The novel appendicostomy technique shows promise in reducing complication rates for MACE and Mitrofanoff procedures.