A nurse on a medical-surgical unit is caring for a client transferred from another department. The nurse should verify that the client has given informed consent prior to which of the following procedures?

The correct answer is C: Receiving moderate sedation. Informed consent is required for procedures where the client's understanding of the risks, benefits, and alternatives is crucial. Moderate sedation involves a level of consciousness where the client may not fully comprehend the procedure or its implications, making informed consent essential to ensure the client's autonomy and safety. Removal of staples, providing a sputum specimen, and collecting a blood specimen for ABGs are routine procedures that typically do not require explicit informed consent as the risks and benefits are well-known and minimal.