A noninvasive technique, skeletal magnetic resonance imaging (MRI) produces clear and sensitive images of bone and soft tissue. The scan provides superior contrast of body tissues and allows imaging of multiple planes, including direct sagittal and coronal views in regions that can’t be easily visualized with X-rays or computed tomography scans. MRI eliminates any risks associated with exposure to X-ray beams and causes no known harm to cells. Show There are two types of MRI. Closed MRI uses scanning equipment that resembles a tunnel like chamber. While open MRI uses more sophisticated equipment. During open MRI, the patient can comfortably see the surroundings from all views while the scan is in progress. This is ideal for patients who are claustrophobic or anxious, children, elderly, and the very obese. A magnetic resonance cholangiopancreatography (MRCP) is a special type of MRI scan. An MRI uses magnetic waves and computers to take images of the inside of the body. MRCP takes images of the hepatobiliary and pancreatic systems, which includes the: Reasons for TestThis test is done to look look:
Possible ComplicationsProblems are rare, but all procedures have some risk. The doctor will go over some problems that could happen. For example, MRCP can be harmful in someone who has metal inside the body, such as:
A contrast dye may be used to take clearer pictures. In some people, the contrast can cause allergic reactions or kidney problems. What to ExpectPrior to TestYour care team may meet with you to talk about:
AnesthesiaThe doctor may give a sedative. You will feel relaxed. Description of TestA contrast material may be injected into the hand or arm. You will lie very still on a sliding table. Monitors may be used to track your pulse, heart rate, and breathing. The table will slide into a narrow, enclosed tube. The technician will leave the room. You will be given directions through an intercom. You can reply through the intercom. Images will be taken of the organs and ducts in the belly. When the exam is done, you will slide out of the machine. Any IV needles used will be removed. Some people may have an MRCP and an MRI scan of the rest of the abdomen done at the same time. After the TestYou will be asked to wait while the images are checked. More images may be needed. How Long Will It Take?The exam may take 15 to 45 minutes. The length of time will depend on whether an MRI scan is also needed. Will It Hurt?The exam does not cause pain. The contrast dye injection may cause some discomfort. ResultsThe images will be studied. A report will be sent to your doctor. Your doctor will talk to you about the results and any further tests or treatment. Problems to Look Out ForCall the doctor if you have:
If you think you have an emergency, call for medical help right away. ResourcesNational Institute of Diabetes and Digestive and Kidney Diseases Radiology Info—Radiological Society of North America Canadian ResourcesCanadian Association of Radiologists Canadian Radiation Protection Association ReferencesCholedocholithiasis. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/choledocholithiasis. Accessed March 9, 2022. Magnetic resonance cholangiopancreatography (MRCP). Radiology Info—Radiological Society of North America website. Available at: https://www.radiologyinfo.org/en/info/mrcp. Accessed March 9, 2022. MRCP scan. Patient website. Available at: https://patient.info/treatment-medication/mrcp-scan. Accessed March 9, 2022. Non-invasive tests. The Pancreas Center—Columbia University Medical Center website. Available at: http://columbiasurgery.org/pancreas/non-invasive-tests. Accessed March 9, 2022. Which of the following actions by the nurse is appropriate when inserting a nasogastric tube?1)Place the client in high Fowler's position. 2)Measure the intended length to insert the NG tube. 3)Lubricate the tube tip with water-soluble lubricant. 4)Direct the tube upward and backward along the floor of the nose.
How much gastric residual is normal?A limit of 500 ml is not associated with adverse effects in gastrointestinal complications or in outcome variables. A value of 500 ml can be equally recommended as a normal limit for GRV.
What is gastric residual volume?Gastric residual volume is the amount of liquid drained from a stomach following administration of enteral feed; this liquid consists mainly of infused nutritional formula or water, and secreted GI juice.
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