MDCT.net's
Guide to Technology and Protocols
MDCT Technology | Technical Considerations | Preparing Patients for Contrast-Enhanced Exams | CM Safety
CM Safety
Patients with immediate-type hypersensitivity to contrast
Note : If necessary, select an alternative mode of testing (MRI or US)
Preparation of Hypersensitive Patients
- Always use nonionic low-osmolar contrast media
- Premedicate patients with known allergies to contrast or known risk factors for reactions
- Glucocorticoids ([methyl]prednisolone, hydrocortisone, dexamethasone) 12 to 2 hours before the examination; oral or IV
- H2-antihistamine (cimetidine or ranitidine in saline) 2 hours before the examination; IV: slow injection or infusion.
- H1-antihistamine (diphenhydramine or clemastine) just prior to examination or during examination; IV
|
