When you need a CT scan to check for a blood clot in …
[Pages:1]When you need a CT scan to check for a blood clot in your lungs
When you came into the emergency department (ED), you had symptoms that prompted your doctor to check for a pulmonary embolism. That's a blood clot in your lungs. If you have one, you need help right away.
If you have a blood clot in your lungs, you may have:
? C hest pain that gets worse when you take deep breaths
? S hortness of breath ? S wollen legs
You may also cough up blood.
You are more likely to have a blood clot in your lungs if you: ? A re over age 50 ? U se birth control that contains
hormones
You are also more likely to have a blood clot if you have: ? A fast heartbeat ? B een injured or had surgery in the last four weeks ? H ad blood clots before ? S igns of heart strain (Your doctor can check for this with
a simple, painless test called an EKG.)
The danger
! of too many
CT scans
When they're needed, CT scans are very helpful. And the risk from a single scan is very small.
But CT scans expose you to a strong dose of radiation. In some cases, it's the same as having about 200 chest X-rays. Your body can often repair the damage CT scans cause to your tissue--but not always. And when it doesn't, the damage could lead to cancer. The more times you're exposed, the greater your risk of cancer.
If you have most of these signs and risk factors, you may have a blood clot in your lungs. In that case, it may be wise to have a CT scan.
If you have just some of these signs and risk factors, or your doctor thinks you are unlikely to have a blood clot, the doctor may order a D-dimer. This blood test looks for signs that your body is trying to dissolve a blood clot.
You may need a CT scan if the D-dimer shows that you may have a blood clot. You may also need one if your doctor is concerned about any of your test results. But it may not be the first test you should have.
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