Final answer:
The nurse should expect a reduction in dyspnea following thoracentesis in a client with advanced lung cancer.
Step-by-step explanation:
The nurse should expect a reduction in dyspnea following thoracentesis in a client with advanced lung cancer. Dyspnea, or difficulty breathing, is a common manifestation of advanced cancer, particularly in cases of lung cancer. Thoracentesis involves the removal of fluid or air from the pleural space, which can help relieve pressure on the lungs and improve breathing.