Which of the following indicates an issue that requires immediate medical attention in ostomy patients?

A stoma that changes color to deep red or purple is a critical signal that indicates compromised blood flow or tissue viability. This color change can suggest that the stoma is becoming ischemic or that there is significant inflammation or necrosis occurring. Immediate medical attention is essential in such cases to assess the situation and implement necessary interventions to prevent further damage or potential loss of the stoma.

In contrast, increased output over time can sometimes be attributed to dietary changes or underlying conditions but may not necessarily indicate an urgent issue. The normal healing process often includes changes in stoma output and appearance as the site adjusts to its new physiology. A stoma with a healthy pink appearance is typically associated with good blood flow and should not raise alarms. Thus, the deep red or purple hue represents a serious condition requiring prompt assessment and treatment.