reason:
Administering ondansetron is not recommendable. Ondansetron is an antiemetic used to control nausea and vomiting, typically given to manage chemotherapy-induced nausea. It's not directly related to flushing the port.

reason:
Obtain blood samples for RBCs, WBCs, and platelets: Obtaining blood samples is important for monitoring the patient's blood cell counts, but it's not related to flushing the port. Blood samples are usually drawn from peripheral veins, not the port.

reason:
Flushing the mediport with saline and a heparin solution is appropriate. When the infusion is complete through an implanted medication port, it's important to maintain the patency of the port to prevent clot formation and ensure proper functioning for subsequent infusions. Flushing the port with saline and a heparin solution is a standard practice to prevent blood from clotting inside the port and the catheter.

reason:
Initiating an infusion of normal saline might be done for hydration or as part of the patient's treatment plan, but it's not specifically related to flushing the port after completing the chemotherapy infusion. Flushing the port helps prevent clot formation within the port and catheter.