A nurse is reviewing a client's cardiac monitor. Which of the following findings should the nurse identify as an indication for synchronized cardioversion?

A. Stop the infusion: Acute hemolytic reactions can occur within minutes of starting a transfusion and are life-threatening. Symptoms such as chills, lower back pain, and nausea indicate a potential reaction, requiring immediate discontinuation of the transfusion to prevent further hemolysis and organ damage.

B. Collect a urine sample: A urine sample helps detect hemoglobinuria, a sign of red blood cell destruction, but it is not the priority. The infusion must be stopped first to prevent further complications before obtaining a urine sample for analysis.

C. Check the client's vital signs: Monitoring vital signs is essential, but the priority is stopping the transfusion to halt the reaction. Vital signs should be checked after discontinuing the infusion to assess the severity of the reaction and guide further interventions.

D. Administer oxygen to the client: Oxygen may be needed if respiratory distress occurs, but stopping the transfusion is the first step to prevent continued exposure to the incompatible blood product. Oxygen therapy should be implemented based on the client's condition after discontinuing the infusion.

A. Closing the inline clamp is necessary when the catheter is not in use to prevent air embolism, but it is not a required step before administering medication. The nurse should focus on flushing and checking for patency before medication administration.

B. Flushing the catheter with 10 mL of 0.9% sodium chloride before and after medication administration helps maintain patency, prevents occlusion, and ensures the catheter is functioning properly. This step is essential to avoid complications such as clot formation.

C. Applying a local anesthetic is not needed for routine medication administration through a nontunneled percutaneous central catheter. Anesthetic use is typically reserved for procedures like catheter insertion or painful dressing changes.

D. Donning sterile gloves is not required for medication administration through a central line. Clean gloves are sufficient, while sterile technique is reserved for dressing changes and catheter insertions.