Final answer:
The nurse manager should intervene when a nurse uses a client's telephone number as one form of identification when administering medications. This does not follow the standard practice of using two unique identifiers. Maintaining proper patient identification is crucial for patient safety.
Step-by-step explanation:
In the scenario where a nurse manager is observing the care provided by a nurse in orientation, the action that indicates the nurse manager should intervene is: C. The nurse uses the client's telephone number as one form of identification when administering medications to a client. Patient identification should be done using two unique identifiers, typically the patient's name and a unique identification number assigned by the healthcare institution, not a telephone number. It is critical in the healthcare setting to correctly identify the patient before any procedure or medication administration, to prevent mistakes and ensure patient safety. Using a telephone number is not a standard practice and thus warrants intervention by the nurse manager.
In contrast, the use of clean gloves when discontinuing an intravenous infusion and the emptying of a colostomy pouch when one-third full are appropriate actions. However, when assisting with a procedure like thoracentesis, maintaining sterile technique is imperative, and the top flap of a sterile tray should be opened away from the body, not toward, to prevent contamination of the sterile field. If a nurse were to open the top flap toward the body, the nurse manager would need to intervene in that instance as well.