Final answer:
Informed consent should be obtained prior to certain medical procedures, such as surgery and invasive diagnostic tests.
Step-by-step explanation:
Prior to certain procedures, it is essential for the nurse to verify that the client has given informed consent. Informed consent ensures that the patient understands the risks, benefits, and alternatives to the procedure, and voluntarily agrees to undergo it. Examples of procedures that require informed consent include surgery, invasive diagnostic tests, and research studies.