General InstructionsLittle preparation is needed for a CT scan. Patients, who do not have congestive heart failure or are not on dialysis, are asked to drink 64 ounces of water before the exam, especially if the exam is performed with oral or intravenous contrast. If possible, they should start drinking 12 hours before their scheduled appointment time. Show If patient is receiving IV or contrast, they should not eat or drink 4 hours prior to exam. Patients will be asked to remove jewelry and other metallic objects that might interfere with the scan. We ask patients to leave jewelry at home when possible. Patients who are breastfeeding should be given an opportunity to make an informed decision about whether to continue breastfeeding after receiving intravascularly administered iodinated contrast media or to temporarily abstain. A very small percentage of iodinated contrast medium can be excreted into the breast milk and absorbed by the infant’s gut. We believe that the available data suggests that is safe for the mother and infant to continue breastfeeding after receiving such an agent. The patient can choose to temporarily abstain from breastfeeding for 24 hours with the active expression and discarding of breast milk from both breast during that period. If so, the patient may wish to use a breast pump to obtain milk beforehand to use during the 24 hour period following the administration of contrast media. Please inform the patient of this option when the exam is scheduled. Patient Screening Prior to Administration of Iodinated ContrastPrior to the administration of iodinated contrast, patients are screened for the following:
Premedication Instructions for Patients with Contrast AllergiesPrednisone 50mg po at 13 hours, 7 hours and 1 hour prior to planned administration of intravenous contrast plus diphenhydramine 50mg po, iv or im at 1 hour prior to planned administration of intravenous contrast Or Methylprednisolone 32mg po at 12 hours and 2 hours prior to planned administration of contrast plus diphenhydramine 50 mg po, iv or im at 1 hour prior to the planned administration of contrast Or Hydrocortisone 200mg iv at 5 hours and 1 hour prior to planned administration of intravenous contrast if patient is unable to take po medications plus diphenhydramine 50 mg po, iv or im at 1 hour prior to the planned administration of contrast Creatinine Testing Prior to Contrast AdministrationRoutine creatinine testing prior to contrast administration is not necessary in all patients. The test should be obtained within 30 days of contrast administration for patients with renal disease, HIV+, diabetic, hypertensive, over 60 years or on chemotherapy. Contrast Administration in Patients with Elevated CreatinineEstimated glomerular filtration rate is a better predicator of renal dysfunction than creatinine alone. The decision to proceed with contrast administration in patients with an estimated GFR < 30 ml/min/1.732 is a matter of clinical judgment, based on the individual circumstances of the patient and following consultation between the radiologist and requesting physician. Strategies to prevent nephropathy in patients with renal impairment include hydration, reduction of contrast dose, and discontinuation of nephrotoxic drugs. A critical diagnostic study should not be delayed because of excessive concern regarding possible contrast nephropathy. Contrast Administration in Patients with Renal FailurePatients on dialysis can receive IV contrast, and early post-procedural dialysis is not routinely required. However, the fact that a patient is on dialysis should not be regarded as automatically allowing the administration IV contrast. The administration of contrast may jeopardize the return of renal function in patients who are receiving dialysis for acute renal failure and may further worsen renal function in patients who still make some urine but receive dialysis intermittently. The volume of IV contrast should also be considered in patients on dialysis who are at risk for volume overload. Contrast Administration in Pregnant PatientsThe 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. You may provide your patients with the following education documents:Cardiac Calcium Scoring Only Scan They may also visit VanderbiltHealth.com/radiology. What is the process of an XX-ray beams pass through your body, and they are absorbed in different amounts depending on the density of the material they pass through. Dense materials, such as bone and metal, show up as white on X-rays. The air in your lungs shows up as black. Fat and muscle appear as shades of gray.
How do you prepare a patient for an XIn most cases, there's not much you need to do to prepare for your imaging exam. You may want to wear loose, comfortable clothing without any zippers, snaps, or metal grommets. It's a good idea to leave jewelry or other metal objects at home, as you will likely be asked to remove them.
What are the infection control requirements for preparing a radiography operatory?Radiography Operatory Preparation
The first step in preparation of the operatory is to determine the surfaces to be covered or disinfected with a high-level surface disinfectant. In general, surfaces that cannot be easily cleaned and disinfected should be protected by a barrier-most commonly plastic or foil barriers.
What should be done after removing each exposed film or PSP from the patient's mouth?If a PSP system is being used, after the exposure has been completed, remove the sensor from the patient's mouth, discard the barrier, and place the sensor in the scanner.
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Process of informing the patient about a procedure, for example, the procedure for taking x-rays
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