In myelography the contrast is?Asked by: Teresa Orn PhD
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This test is also called myelography. The contrast dye is injected into the spinal column before the procedure. The contrast dye appears on an X-ray screen allowing the radiologist to see the spinal cord, subarachnoid space, and other nearby structures more clearly than with standard X-rays of the spine.
What contrast is used for myelography?
A review of the contrast media used for myelography and radiculography is presented. Water-soluble, nonionic medium like metrizamide enables the examination of the entire CSF space. The relation of the diagnostic benefit to complications when using this contrast medium is favorable.
Where is the contrast medium injected for a myelogram?
The contrast material usually is injected into the lower lumbar spinal canal, because it is considered easier and safer. Occasionally, if it is deemed safer or more useful, the contrast material will be injected into the upper cervical spine.
What is the process of a myelogram?
A myelogram uses X-rays and a special dye called contrast material to visualize the spaces between the bones in your spinal column. A myelogram may be done to find a tumor, an infection, problems with the spine such as a budging disc, and arthritis.
What are the side effects of a myelogram?
- Numbness and tingling of the legs.
- Blood or other drainage from the injection site.
- Pain at or near the injection site.
- Nausea or vomiting.
- Inability to urinate.
- Stiff neck.
- Leg numbness.
What It’s Like to Get a Myelogram
Is a myelogram the same as a spinal tap?
A myelogram is performed first in a separate procedure. This is similar to a lumbar puncture, or spinal tap, where the fluid space around the spinal cord (within the spinal canal) is accessed with local anesthesia and contrast (usually 12cc non-ionic iodinated contrast) is administered.
How long should you rest after a myelogram?
What happens after a myelogram? You need to sit or lay down for several hours after the procedure to reduce your risk of developing a CSF (cerebral spinal fluid) leak. Most patients are asked to lie down for two hours after the procedure.
How painful is a CT myelogram?
Is a CT myelogram painful? Some patients report discomfort during the injection of the dye; others do not. The CT scan is not painful.
How long does it take to recover from a myelogram?
The recovery period is about 2 hours. Plan to be in the Department of Radiology for 4-6 hours. Arrange to have someone stay with you for 24 hours following the procedure.
What is the most common injection site for a myelogram?
Myelography involves radiographs and/or CT of the spine following opacification of the subarachnoid space by intrathecal injection of iodinated contrast, most commonly injected at the lumbar level.
What is the most common clinical indication for a myelogram?
As a result, one of the most common indications for CT myelography is to help evaluate the spinal canal and neural foramina in degenerative disease when the patient cannot undergo MRI because of an MRI-incompatible implanted device or when MR images would be nondiagnostic because of extensive artifact (1).
What should I do after myelogram?
- Stay in bed for 24 hours after your myelogram. Do not lie flat. ...
- Drink lots of fluids for 18 hours, at least 8 ounces every 2 hours while awake. ...
- If your headache, nausea, or vomiting persists after 48 hours of bed rest, call your doctor.
- In general, you can resume normal activities the next day.
Why is iodine used as a contrast agent?
Iodine has a particular advantage as a contrast agent because the k-shell binding energy (k-edge) is 33.2 keV, similar to the average energy of x-rays used in diagnostic radiography 1. When the incident x-ray energy is closer to the k-edge of the atom it encounters, photoelectric absorption is more likely to occur.
Is laminectomy the same as decompression?
Laminectomy is surgery that creates space by removing the lamina — the back part of a vertebra that covers your spinal canal. Also known as decompression surgery, laminectomy enlarges your spinal canal to relieve pressure on the spinal cord or nerves.
Can you see nerves on a CT scan?
Answer: Damaged nerves cannot be seen on a regular X-ray. They can be seen on CAT scan or MRI, and in fact, MRI is recommended for examining details of the spinal cord.
Why was my myelogram so painful?
Any back pain you already have may be made worse by the extra pressure of the injected fluid. The fluid is absorbed by the body over the few hours after the myelogram, and the extra pain decreases when this happens. Sometimes it can be hard to get the needle into the fluid sac and the myelogram cannot be done.
What is the difference between a CT scan and a myelogram?
A myelogram consists of injecting a radiographically opaque dye (dye that is picked up by x-ray) into the sac around the nerve roots, which in turn lights up the nerve roots. The CT scan follows and shows how the bone is affecting the nerve roots.
Does a CT myelogram show nerve damage?
What can you see from a myelogram? A myelogram is able to show your spinal cord, spinal nerves, nerve roots, and bones in the spine by injecting contrast into your spinal fluid. As a result, it will also reveal whether anything is pressing against your spinal cord or nerves.
Can I eat or drink before myelogram?
Preparation for the procedure
Do not eat or drink anything 6 hours prior to the exam. Medications may be taken with a small amount of water. Outpatients, please arrive 60 minutes before the scheduled exam time.
Can a myelogram cause paralysis?
There is a small risk of having an allergic reaction to the dye. You will be given medicine for a reaction. In rare cases, inflammation of the spinal cord, weakness, numbness, paralysis, or loss of control of your bowel or bladder may develop. Also in rare cases, the dye may cause blockage of the spinal canal.
Can I take a bath after a myelogram?
For the first 24 hours after your myelogram: Avoid bending over. Don't shower or put your body in water, such as in a bathtub, pool, or hot tub.
Do you get sedated during a myelogram?
A myelogram is an outpatient procedure that takes about an hour. You will be asked to remove clothing and jewelry that may interfere with the test. You will lie down on a padded table and will receive sedation (medication to make you drowsy and relaxed).
What are the symptoms of arachnoiditis?
- Tingling, numbness or weakness in the legs.
- Sensations that may feel like insects crawling on the skin or water trickling down the leg.
- Severe shooting pain that can be similar to an electric shock sensation.
- Muscle cramps, spasms and uncontrollable twitching.
Can you urinate before CT scan?
Your doctor may instruct you to not eat or drink anything several hours beforehand. In order to distend your urinary bladder, you may be asked to drink water prior to the exam and not to urinate until your scan is complete. Leave jewelry at home and wear loose, comfortable clothing. You may be asked to wear a gown.