Final answer:
The nurse should monitor stool characteristics to determine the effectiveness of pancreatic enzymes in a client with cystic fibrosis.
Step-by-step explanation:
The nurse should monitor stool characteristics to determine the effectiveness of the pancreatic enzymes in a client with cystic fibrosis (CF). The presence of elastase in the stool is an indicator of pancreas function. Elastase digests proteins, so if the pancreatic enzymes are effective, it should be present in the stool sample.