In Patients With Suspected Pulmonary Embolism, CT Angiography may be Unnecessary

by Kathy Jones on  June 15, 2010 at 8:33 PM General Health News
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Based on the results of risk assessment analysis, a new study suggests that computed tomography (CT) angiography might be unnecessary in many patients suspected of having pulmonary embolism (PE).

PE risk assessment could help reduce radiation exposure and costs associated with CT angiography. The results of the study appear in the online edition and August print issue of the journal Radiology.

"Our study suggests that the frequency of ordering CT angiograms can be markedly reduced with resultant cost-savings and decreased radiation exposure," said lead author Mark D. Mamlouk, M.D., radiology resident at the University of California, Irvine in Orange, Calif.

Pulmonary embolism occurs when a blood clot, usually from the leg, travels through the bloodstream and gets lodged in a pulmonary artery. The condition can be fatal, so prompt diagnosis is critical.

CT angiography's high sensitivity and specificity has made it the preferred modality for diagnosing PE. However, the increasing use of the examination has fueled concerns over procedure costs and radiation exposure to patients, along with risks associated with the use of contrast agents.

For the study, the researchers assessed the possibility of using risk factors associated with thromboembolism, or blood clot formation, to reduce the number of CT angiograms for PE. They reviewed the electronic medical records of 2,003 patients who underwent CT angiography for possible PE between July 2004 and February 2006. Among the risk factors assessed were age, history of immobilization and cancer. Other risk factors included excess estrogen state, a history of venous thromboembolism, gender and disorders that cause blood to clot more easily than normal.

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If you have a question about health related issues, you can now post it in our Ask An Expert section on our community website Medwonders.com and get answers from our panel of experts.

maggie99(Guest)

06/08/2011

How exactly does contrast for a pulmonary scan work? I believe to have had angor animi for 2 months after a pulmonary CAT scan in 1999. I had symptoms of pulmonary hypertension when I presented to the E.R. in Chicago that night and I am having a difficult time getting answers from my health care professionals. I had no history nor symptoms of "clots" at the time the CAT scan was ordered. I suspect foul play in the whole incident. Any information/articles about pulmonary CAT scans would be helpful.




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