Which statement describes a convexity precaution?

• A. Peristomal hernia
• B. MCJ separation
• C. Peristomal Crohn's ulcer
• D. Peristomal varices

Answer: (D)

The idea behind convexity precautions is to be careful with pressures around the stoma, since convex appliances push the skin and peristomal area outward to improve contact and prevent leaks. When peristomal varices are present, those dilated veins sit close to the skin and are very fragile. The added pressure from a convex barrier can irritate or rupture these veins, increasing the risk of bleeding and skin trauma. So recognizing varices around a stoma means you should avoid or minimize convexity and consider gentler options or protective measures, with close monitoring for signs of bleeding. Other peristomal issues like hernias or Crohn’s ulcers involve different mechanisms and aren’t specifically about precautions with convexity.