Which statement best describes when to use a primary anastomosis in colon surgery?

Which statement best describes when to use a primary anastomosis in colon surgery?

• A. Only in young patients
• B. Only in the sigmoid colon
• C. When there is good tissue quality, adequate blood supply, and no gross contamination
• D. Only with diverticulitis

Answer: (C)

A primary anastomosis is most safely performed when the bowel ends are healthy, well perfused, and the operative field is free of gross contamination. Tissue quality matters because a friable, edematous, or necrotic segment won’t hold sutures well and is prone to leaks. Adequate blood supply ensures robust healing at the anastomosis, while a clean field minimizes infection risk that can compromise connection healing. If any of these conditions are missing—tissue is nonviable or perfusion is poor, or there is gross fecal contamination—the risk of anastomotic failure is high, and a staged approach or diversion may be preferred. Age, location in the colon, or a history of diverticulitis do not by themselves determine the decision; they are not universal prerequisites or contraindications. The statement that best describes when to use a primary anastomosis centers on tissue viability, perfusion, and cleanliness of the field.

A primary anastomosis is most safely performed when the bowel ends are healthy, well perfused, and the operative field is free of gross contamination. Tissue quality matters because a friable, edematous, or necrotic segment won’t hold sutures well and is prone to leaks. Adequate blood supply ensures robust healing at the anastomosis, while a clean field minimizes infection risk that can compromise connection healing. If any of these conditions are missing—tissue is nonviable or perfusion is poor, or there is gross fecal contamination—the risk of anastomotic failure is high, and a staged approach or diversion may be preferred. Age, location in the colon, or a history of diverticulitis do not by themselves determine the decision; they are not universal prerequisites or contraindications. The statement that best describes when to use a primary anastomosis centers on tissue viability, perfusion, and cleanliness of the field.