Why do I need a eu blood test prior to CT scan?

A EU blood test prior to a CT scan is often required to assess kidney function, particularly because some CT scans involve the use of contrast material that can affect renal function. This is especially important for patients with pre-existing kidney issues, as the contrast agent can potentially lead to complications such as contrast-induced nephropathy. The blood test helps ensure that the benefits of the scan outweigh any potential risks.