What should be monitored closely when performing a CT scan with contrast?

Monitoring kidney function is critical when performing a CT scan with contrast due to the potential risks associated with the contrast agent used during the procedure. Many contrast materials contain iodine, which can lead to contrast-induced nephropathy, especially in patients with pre-existing kidney issues or those who are dehydrated. Assessing kidney function through serum creatinine levels or glomerular filtration rate (GFR) before the scan helps to identify individuals at risk and ensure their safety during the procedure.

The other options, while relevant in different clinical contexts, do not directly relate to the immediate risks associated with the use of contrast in CT imaging. Blood glucose levels, for example, are important for diabetic patients but are not specifically monitored in relation to contrast administration. Bowel sounds, being a sign of gastrointestinal activity, and heart rate, which can indicate a patient’s cardiovascular status, also do not have the same direct connection to the effects of contrast agents as kidney function does. Hence, monitoring kidney function is essential to prevent complications and ensure patient safety during CT scans with contrast.