A client with pain in their lumbar spine is scheduled to have a computed tomography (CT) scan. The nurse is going to check the patient's chart for which of the following?

A. Client's allergy to latex: Latex allergy is important to assess for certain procedures involving catheters or gloves, but CT scans do not typically involve latex exposure that would cause a reaction. It is not the primary concern before a CT scan. B. Client's claustrophobia: Claustrophobia may affect the client’s comfort during the scan, especially in an enclosed CT scanner. While relevant, it does not present a direct medical contraindication and can often be managed with sedation or reassurance. C. Client's allergy to shellfish: Shellfish allergy is relevant because many CT scans use iodinated contrast dye, which can trigger an allergic reaction in patients with a history of shellfish or iodine sensitivity. Checking for this allergy is crucial to prevent severe hypersensitivity reactions. D. Client's gluten allergy: Gluten allergy or celiac disease does not impact the safety or preparation for a CT scan, as no gluten-containing substances are involved in the procedure.