Diverting ileostomy in colorectal surgery: when is it necessary?

Area of Science:

• Colorectal Surgery
• Surgical Oncology
• Gastroenterology

Background:

• The use of fecal diversion via loop ileostomy in rectal resection and anastomosis is debated.
• Conflicting evidence exists regarding the benefits versus morbidity of defunctioning stomas.

Purpose of the Study:

• To review surgical literature on the risks, benefits, and costs of diverting ileostomies in current colorectal practice.
• To evaluate the role of fecal diversion in patients undergoing rectal resection and anastomosis.

Main Methods:

• A 50-year review of retrospective and prospective articles.
• Analysis of anastomotic leak definitions, risk factors, and evaluation methods.
• Pooling evidence on fecal diversion, stomal complications, and ileostomy vs. colostomy.

Main Results:

• Fecal diversion significantly reduces anastomotic leak risk and reoperation necessity, without decreasing mortality.
• Diverting stomas have low technical risk but can cause significant morbidity and affect quality of life.
• High-risk patients (low anastomoses, difficult resections, malnutrition, male) benefit most from diversion.

Conclusions:

• Fecal diversion is a selective tool to protect against anastomotic leaks, especially in high-risk patients with low pelvic anastomoses.
• Selective use in high-risk cases is recommended to ameliorate anastomotic leak risk.
• Further research is needed for tools to identify patients at high risk for anastomotic failure.