Which radiographic procedure would require nonionic contrast media instead of ionic contrast media?

Nonionic contrast media are preferred in certain procedures, such as a myelogram, due to their lower osmolality and reduced risk of adverse reactions compared to ionic contrast media. In a myelogram, which involves the injection of contrast material into the spinal canal, the use of nonionic contrast is beneficial. This type of contrast is less likely to cause discomfort or complications, making it particularly suitable for delicate procedures involving the central nervous system.

In a myelogram, the aim is to visualize the spinal cord and nerve roots clearly, and the use of nonionic contrast agents can provide better image quality and safety for the patient. This contrast media option minimizes the potential for allergic reactions, nephrotoxicity, and other side effects associated with ionic media, especially important in patients with preexisting kidney issues or other health considerations.

Other options, while they may also use contrast media, generally have different considerations or established protocols that often include ionic contrast agents. For example, CT scans and angiography typically rely on ionic contrast media, but they have been increasingly incorporating nonionic agents as safety profiles improve. Fluoroscopy can also utilize both types of contrast, depending on the specific study and patient situation.