A 68-yeаr-оld client with end-stаge renаl disease (ESRD) arrives at the оutpatient dialysis center fоr a scheduled hemodialysis session. The RN is the only registered nurse on the unit and is responsible for overseeing care for several clients. A certified dialysis technician (CDT) is available to assist with patient care. The RN is determining which tasks can be appropriately delegated. Which task is most appropriate for the RN to delegate to the certified dialysis technician?