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Where are hives most likely to appear after iv contrast injection?
Wiki User
∙ 13y ago
While hives can occur anywhere, the most common areas are the face and neck.
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∙ 13y ago
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Lumbar spine CT scan?
DefinitionA computed tomography (CT) scan of the lumbar spine is an imaging method that uses x-rays to create cross-sectional pictures of the lower back (lumbar spine).Alternative NamesCAT scan - lumbar spine; Computed axial tomography scan - lumbar spine; Computed tomography scan - lumbar spineHow the test is performedYou will be asked to lie on a narrow table that slides into the center of the CT scanner. You will lie on your back with your arms up over your head.Once you are inside the scanner, the machine's x-ray beam rotates around you. (Modern "spiral" scanners can perform the exam in one continuous motion.)Small detectors inside the scanner measure the amount of x-rays that make it through the lower back. A computer takes this information and uses it to create several individual images, called slices. These images can be stored, viewed on a monitor, or printed on film. Three-dimensional models of the lumbar spine can be created by stacking the individual slices together.You must be still during the exam, because movement causes blurred images. You may be told to hold your breath for short periods of time.The exam should take 15 - 30 minutes.How to prepare for the testCertain exams require a special dye, called contrast, to be delivered into the body before the test starts. Contrast can highlight specific areas inside the body, which creates a clearer image.Some people have allergies to IV contrast and may need to take medications before their test in order to safely receive this substance.Contrast can be given in several ways.It may be delivered through a vein (IV) in your hand or forearm.It may be given as an injection into the space surrounding the spinal cord.If contrast is used, you may also be asked not to eat or drink anything for 4-6 hours before the test.If you weigh more than 300 pounds, have your doctor contact the scanner operator before the exam. CT scanners have a weight limit. Too much weight can cause damage to the scanner's working parts.Since x-rays have difficulty passing through metal, you will be asked to remove jewelry and wear a hospital gown during the study.How the test will feelSome people may have discomfort from lying on the hard table.Contrast given through an IV may cause a slight burning sensation, a metallic taste in the mouth, and a warm flushing of the body. These sensations are normal and usually go away within a few seconds.Why the test is performedCT rapidly creates detailed pictures of the lower back. The test may be used to evaluate:Birth defects of the spine in childrenThe lower spine after severe traumaOther spine problems when MRI cannot be usedLumbar CT scan can also be used during or after an x-ray of the spinal cord and spinal nerve roots (myelography) or an x-ray of the disk (discography).Normal ValuesResults are considered normal if the lumbar region is normal in appearance.What abnormal results meanAbnormal results may be due to:Birth defects of the spineBone problemsFractureLumbar disk herniationLumbar spinal stenosisSpondylolisthesisWhat the risks areCT scans and other x-rays are strictly monitored and controlled to make sure they use the least amount of radiation. CT scans do create low levels of ionizing radiation, which has the potential to cause cancer and other defects. However, the risk associated with any individual scan is small. The risk increases as numerous additional studies are performed.In some cases, a CT scan may still be done if the benefits greatly outweigh the risks. For example, it can be more risky not to have the exam.The most common type of contrast given into a vein contains iodine. If a person with an iodine allergy is given this type of contrast, nausea or vomiting, sneezing, itching, or hives may occur. Let your doctor know if you have ever had an allergic reaction to injected contrast dye.If you absolutely must be given such contrast, your doctor may choose to treat you with antihistamines (such as Benadryl) or steroids before the test.The kidneys help filter the iodine out of the body. Therefore, those with kidney disease or diabetes should receive plenty of fluids after the test, and be closely monitored for kidney problems. If you have diabetes or are on kidney dialysis, talk to your health care provider before the test about your risks.Before receving the contrast, tell your health care provider if you take the diabetes medication metformin (Glucophage) because you may need to take extra precautions.Rarely, the dye may cause a life-threatening allergic response called anaphylaxis. If you have any trouble breathing during the test, you should notify the scanner operator immediately. Scanners come with an intercom and speakers, so the operator can hear you at all times.Special considerationsThe lumbar CT scan is good for evaluating large herniated disks, but it can miss smaller ones. This test can be combined with a myelogram to get a better image of the nerve roots and pick up smaller injuries.ReferencesCurlee PM. Other disorders of the spine. In: Canale ST, Beaty JH. Campbell's Operative Orthopaedics. 11th ed. Philadelphia, Pa: Mosby Elsevier;2007:chap 21.Chou R, Qaseem A, Snow V, Casey D, Cross JT Jr., Shekelle P, et al. Diagnosis and treatment of low back pain: a joint clinical practice guideline from the American College of Physicians and the American Pain Society. Ann Intern Med. 2007;147:478-491.
Cranial CT scan?
DefinitionA cranial computed tomography (CT) scan is an imaging method that uses x-rays to create cross-sectional pictures of the head, including the skull, brain, eye sockets, and sinuses.See: Computed tomographyAlternative NamesBrain CT; Head CT; CT scan - skull; CT scan - head; CT scan - orbits; CT scan - sinusesHow the test is performedYou will be asked to lie on a narrow table that slides into the center of the CT scanner. Depending on the study being done, you may need to lie on your stomach, back, or side.A cranial CT scan produces images from your upper neck to the top of your head.You must be still during the exam, because movement causes blurred images. If you can't stay still, pillows or cushions may be placed around your head to hold it in place.Once inside the scanner, the machine's x-ray beam rotates around you. (Modern "spiral" scanners can perform the exam in one continuous motion.) You may be told to hold your breath for short periods of time.Small detectors inside the scanner measure the amount of x-rays that make it through the part of the body being studied. A computer takes this information and uses it to create several individual images, called slices. These images can be stored, viewed on a monitor, or printed on film. Three-dimensional models of your head can be created by stacking the individual slices together.Special dye, called contrast, may be used to help highlight blood vessels and look for a mass (tumor). If this is needed, the health care provider will inject the dye into a vein.Generally, complete scans take only a few minutes. The newest multidetector scanners can image your entire body, head to toe, in less than 30 seconds.How to prepare for the testUsually, no preparation is needed. However, if contrast is needed, you may be asked not to eat or drink anything for 4-6 hours before the test.Tell your health care provider if you are allergic to IV contrast.Since x-rays have difficulty passing through metal, you will be asked to remove jewelry and wear a hospital gown during the study.How the test will feelThe x-rays produced by the CT scan are painless. Some people may have discomfort from lying on the hard table.Contrast give through a vein may cause a slight burning sensation, a metallic taste in the mouth, and a warm flushing of the body. These sensations are normal and usually go away within a few seconds.Why the test is performedA cranial CT scan is recommended to help diagnose or monitor the following conditions:Abnormal development of the head or neckBleeding in the brainBrain infectionBrain tumorA cranial CT may also be done to:Determine the cause of a headacheDetermine the cause of vision problems, muscle weakness, numbness and tingling, hearing loss, speaking difficulties, or swallowing problemsDiagnose a new strokeEvaluate changes in thinking or behaviorEvaluate injury to the head and faceWhat abnormal results meanAbnormal results may be due to:Abnormal blood vessels (arteriovenous malformation)Abnormal sinus drainageAneurysmBleeding (for example, chronic subdural hematomaor intracranial hemorrhage)Bone infectionBrain abscessor infectionBrain damage due to injuryBrain tissue swelling or injuryBrain tumor or massCerebral atrophy (loss of brain tissue)Hydrocephalus(fluid collecting in the skull)Problems with the hearing nerveStroke or transient ischemic attack (TIA)What the risks areIodine is the usual contrast dye. Some patients are allergic to iodine and may experience a reaction that may include hives, itching, nausea, breathing difficulty, or other symptoms.As with any x-ray examination, radiation is potentially harmful. Consult your health care provider about the risks if multiple CT scans are needed over a period of time.Special considerationsA CT scan can decrease or eliminate the need for invasive procedures to diagnose problems in the skull. This is one of the safest means of studying the head and neck.Alternative tests that may be performed in place of Cranial CT scan include:MRI of the headPositron emission tomography (PET) scan of the headSkull x-rayReferencesShaw AS, Dixon AK. Multidetector computed tomography. In: Grainger RC, Allison D, Adam, Dixon AK, eds. Diagnostic Radiology: A Textbook of Medical Imaging. 5th ed. New York, NY: Churchill Livingstone; 2008:chap 4.Saunders D, Jager HR, Murray AD, Stevens JM. Skull and brain: methods of examination and anatomy. In: Grainger RC, Allison D, Adam, Dixon AK, eds. Diagnostic Radiology: A Textbook of Medical Imaging. 5th ed. New York, NY: Churchill Livingstone; 2008:chap 55.
Why is there air on earth but not in space?
The Sun is not "on fire" in the way that we think of as "fire" here on Earth, in the sense of wood or coal burning in an oxygen atmosphere. The Sun "burns" with a nuclear reaction, in which hydrogen nuclei fuse into helium nuclei, releasing energy. This reaction takes place at the core of the Sun, at temperatures of 15 million degrees. We can, for just an instant, recreate this process here on Earth; we call it a "hydrogen bomb".
Can contrast agents for computed tomography scans cause side effects?
Some patients may experience a salty taste, flushing of the face, warmth or slight nausea, or hives from an intravenous contrast injection. Technologists and radiologists have equipment and training to help patients
If you're taking suboxone and try to shoot up heroin can it cause hives around the injection site?
No, but the Buprenorphine will probly keep that heroin from feeling worth it. If your taking Suboxone and your still putting a needle in your arm you have more worries than hives around the injection site. . .I agree, but would also just like to add that heroin in general can often times cause hives around the injection site. I could never figure out if it was the type pf Heroin, where it was injected, did some leak out around the vein etc. I do know that opiates cause a general raise in hystamine levels which cause hives.
How do you treat hives after swimming in the pool?
You would treat it the same way as if it were regular hives. Most likely, you would use an epipen.
Can fleas give you a rash?
not necessarily a rash but if you are allergic to the bites they can bite you and cause hives....the hives are red and can appear in clusters. they itch very bad - benedryl otc will help stop the itch
How long after taking antibiotics will hives appear?
I started a round of antibiotics (a "Z" pack) and within 2 hours of taking the first dose, I noticed hives appearing in their usual spots (for me, the face).I ceased taking the meds, but the hives and other side effects stayed with me for more than 7 days.
Can hormone replacement patches cause hives?
Yes. Any patch on the skin can cause hives. Remember, it is the patch itself which is most likely to cause hives - although the medicine in the patch can precipitate this reaction in some individuals, as well.
What is in red licorice that causes hives?
most likely it is the red dye food coloring that is added to make it red
Why are you getting hives on your chest and throwing up?
It is most likely an allergic reaction, but you should definitely go to the hospital!
Can hives and itching be caused by the kidneys?
A lot of different things can cause hives, including this. Yes, this can cause hives. You should see a doctor if hives continue.
Is it Hive the Hive Hives or The Hives for the band they sing a song on the matrix album Ultrasonic Sound?
the hives
What causes hives on the bottom of your feet?
Hives is an allergic reaction. Stepping on something you are allergic to can give you hives.
Can staph cause hives?
Can staph cause , hives .
