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Ct and mri preparation
This document provides preparation instructions for CT, MRI, and contrast administration. It outlines screening requirements like medical history, allergies, medications, and creatinine tests. For CT and MRI, it instructs patients to remove metallic objects and drink water. CT patients may need premedication for contrast allergies. MRI screening identifies absolute contraindications like pacemakers. Gadolinium administration requires creatinine testing in high risk patients due to risks of nephrogenic systemic fibrosis. Pregnant women should only have MRI if absolutely necessary due to risks of intravenous gadolinium.
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Ct and mri preparation
- 1. CT AND MRIPREPARATION NUR FADZLINA ZABRI 08201310006
- 2. Important information forall imaging examinations • Complete history • Allergies to Contrast • Diabetic Patients • Creatinine Blood Test: completed no later than 60 days prior • Medications (prescribed and over the counter) • Previous medical records and images
- 3. CT Scan Preparation Generalinstruction –Complete history –Drink plenty of water (pre, post test) –Removal of all unnecessary metallic objects, including jewellery and drug delivery patches. –Premedication to be taken (allergy cases)
- 4. Screening prior toiodinated contrast administration –Previous reactions to iodinated contrast media –Creatinine test –History of diabetes or renal disease –For women of child-bearing age, currently or possibly pregnant or currently breast- feeding
- 6. MRI Preparation General instruction –Completehistory –Removal of all unnecessary metallic objects, including jewellery and drug delivery patches. –Acoustic noise protection i.e. ear plugs and pads or head phones
- 7. Patient screening priorto MRI 1. Absolute contraindication pacemakers, aneurysm clip, pregnancy, pain stimulator implants, insulin pumps, other implantable drug infusion pumps, and cochlear implants. An exception is a newer type of pacemaker approved by the Food and Drug Administration (FDA) that is specifically engineered so that patients can safely undergo MRI.
- 8. 2. Creatinine TestingPrior to Gadolinium Administration – In patient with following risk factors Age over 60 History of kidney disease, including tumor and transplant Family history or kidney failure or disease Diabetes treated with insulin or other prescribed medications Hypertension requiring medication Multiple myeloma Solid organ transplant History of severe liver disease
- 9. Gadolinium in Patientswith Impaired Renal Function –Nephrogenic systemic fibrosis (NSF), a serious, painful, debilitating, and sometimes fatal scleroderma-like disorder, is associated with the administration of intravenous gadolinium.
- 10. MRI in pregnantlady – ONLY if the procedure cannot be reasonably postponed until after the pregnancy. – Intravenous gadolinium is contraindicated in pregnancy - hence clinician should discussed with patient thoroughly – MUST obtain written consent.
- 11. During the scan –Patient should avoid coughing, wriggling or producing other large motion during the scans – Patient with claustrophobia/children may require sedation (diazepam,midazolam)
- 12. References • William Herring,Learning radiology and Recognizing the Basics by Elsevier • https://medschool.vanderbilt.edu/radiology/ medical-professionals/prepare#collapse-520 • https://medschool.vanderbilt.edu/radiology/ medical-professionals/prepare
Editor's Notes
- #4 Methylprednisolone, prednisolone, or hydrocortisone should be tken 7 hours prior to administration of contrast
- #5 Metformin shud be discontinued 48 hours prior to the test
- #7 All patients and other individuals in the room during the actual scan receive acoustic noise protection. When possible, two forms of noise protection are utilized, i.e. ear plugs and pads or head phones
- #10 NSF produces fibrosis resembling scleroderma of the skin,eyes, joints, and internal organs. Caution must be exercised when administering gadolinium to patients who have moderate renal disease (particularly with estimated glomerular filtration
- #11 MRI should probably not be performed electively in earlyterm pregnancy due to the unknown risk to the fetus. ■ The use of gadolinium contrast agents is not recommendedin pregnant patients, because gadolinium crosses the placenta, is subsequently excreted by the fetal kidneys, and has unknown effects on the fetus.