A client is scheduled for a spiral computed tomography (CT) scan with contrast to evaluate for pulmonary embolism. Which information in the client's history requires follow-up by the nurse?

Choice A reason: Metformin is contraindicated with iodinated contrast due to the risk of lactic acidosis, a rare but serious complication. The nurse needs to follow up and likely hold the metformin before and after the CT scan to reduce this risk.Choice B reason: A metal hip prosthesis may interfere with imaging, but this information is not as critical as the potential risk posed by metformin. The radiology team should be informed, but it does not require immediate follow-up in the same way as medication contraindications.Choice C reason: A CT scan performed six months earlier does not contraindicate a repeat scan, although it may be relevant to the clinical history. The main concern is to ensure there are no contraindications to the contrast agent.Choice D reason: The client's sobriety report does not affect the administration of a CT scan with contrast. This information is not directly relevant to the immediate safety and effectiveness of the imaging procedure.