Final answer:
The nurse should notify the surgeon immediately when observing a large part of the bowel protruding through the abdomen during a dressing change for a client recovering from a hemicolectomy.
Step-by-step explanation:
The nurse should notify the surgeon immediately when observing a large part of the bowel protruding through the abdomen during a dressing change for a client recovering from a hemicolectomy. This is a serious complication called a bowel evisceration, which requires prompt medical attention. It is important to ensure the surgeon is aware of the situation to determine the appropriate course of action and prevent further complications.