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?

A) Takes metformin hydrochloride for type 2 diabetes mellitus: Metformin can interact with the contrast dye used in CT scans, particularly in patients with impaired renal function. The contrast dye can affect kidney function, potentially leading to lactic acidosis in patients taking metformin. It is important to follow up on this history and possibly temporarily discontinue metformin and monitor kidney function before and after the procedure. B) Metal hip prosthesis was placed twenty years ago: A metal hip prosthesis does not typically affect the CT scan with contrast, though it may affect the imaging technique or quality. This history usually does not require follow-up related to the contrast use. C) Report of client's sobriety for the last five years: Sobriety does not directly impact the use of contrast dye in a CT scan. This information is relevant for overall health but not specifically for the use of contrast. D) CT scan that was performed six months earlier: The timing of a previous CT scan is not a contraindication for a new scan with contrast. Follow-up on the history of a prior scan may be relevant for comparison but does not specifically impact the use of contrast dye.