Which action indicates that a parent understands how to care for an infant with a colostomy?

Applying paste to the back of the wafer of an infant's colostomy appliance shows an understanding of proper stoma care. This action is important because the paste serves to create a better seal between the appliance and the skin, helping to prevent leaks. This is crucial for maintaining skin integrity around the stoma and ensuring that the appliance adheres properly. Proper use of barrier products like paste can enhance the wear time of the appliance, which is vital for the comfort and hygiene of the infant.

In addition, it's pertinent to consider the context of the other options regarding colostomy care. Changing the appliance every day might not be necessary unless there is a specific reason, such as leakage or skin irritation. Regular monitoring of the stoma and surrounding skin is essential, and changing the appliance should be done based on the condition rather than a set time schedule. Furthermore, using regular tape is not advised as it may not adhere properly and can damage the skin. Lastly, neglecting to wash the skin around the stoma can lead to skin irritation, infections, and complications, underscoring the importance of thorough hygiene in colostomy care.