Final answer:
To address the risk for infection in a patient undergoing peritoneal dialysis, maintaining aseptic technique when administering dialysate is the best nursing action.
Step-by-step explanation:
In order to best address the risk for infection in a patient undergoing peritoneal dialysis, the nurse should maintain aseptic technique when administering dialysate. Aseptic technique involves following strict protocols to maintain sterility and prevent contamination of the patient with microbes and infectious agents. By practicing aseptic technique, the nurse can minimize the risk of infection during peritoneal dialysis.