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) CT scan that was performed six months earlier: A previous CT scan performed six months earlier does not necessarily require follow-up by the nurse. However, it would be important to review the results of the previous CT scan to compare findings and assess for any changes over time. B) Takes metformin hydrochloride for type 2 diabetes mellitus: This is the correct answer. Metformin is excreted by the kidneys, and contrast media used in CT scans can potentially cause kidney damage, particularly in clients with pre-existing renal impairment. Therefore, clients taking metformin may be at increased risk of developing lactic acidosis if renal function is compromised. It is essential for the nurse to follow up on this information and coordinate with the healthcare provider to determine whether metformin should be temporarily discontinued before the CT scan and when it can be safely resumed. C) Report of client’s sobriety for the last five years: The client’s sobriety status for the last five years is not directly relevant to the CT scan with contrast for evaluating pulmonary embolism. While substance use history is important for overall health assessment, it does not specifically require follow-up related to the CT scan. D) Metal hip prosthesis was placed twenty years ago: The presence of a metal hip prosthesis placed twenty years ago may be relevant for certain imaging studies, such as magnetic resonance imaging (MRI) or metal artifact reduction sequence (MARS) MRI, but it is not directly related to the CT scan with contrast for pulmonary embolism evaluation. Therefore, it does not require immediate follow-up by the nurse in this context.