After a client undergoes a paracentesis, a nursing assessment that warrants immediate intervention is any sign of complications or adverse effects. Some potential complications of a paracentesis include infection, bleeding, or fluid leakage. The nurse should closely monitor the client for any signs of these complications, such as fever, increased pain or tenderness at the puncture site, or swelling. If the client experiences any of these symptoms or any other adverse effects, the nurse should report them to the healthcare provider and take appropriate action as directed. It is important for the nurse to closely monitor the client and intervene promptly in the event of any complications to ensure the client's safety and well-being.