Contrast Administration in Patients Receiving Metformin

Metformin should be discontinued at the time of the procedure, withheld for 48 hours subsequent to the procedure, and reinstituted only after renal function has been re-evaluated and found to be normal.

Contrast Administration in Pregnant Patients

The iodine content of contrast media has the potential to cause hypothyroidism in the neonate. Pregnant women who receive an intravenous iodinated contrast agent are counseled that neonatal thyroid function should be checked in the first week of life. Informed consent is obtained prior to the administration of contrast in pregnant patients.