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Alternative Names Return to topPulmonary arteriography
Definition Return to top
A pulmonary angiography is is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the lungs.
How the Test is Performed Return to top
This test is done in a hospital. You will be asked to lie on an x-ray table. Electrocardiogram (ECG) leads are taped to your arms and legs to monitor the electrical impulses of the heart.
Before the test starts, you will be given a mild sedative to help you relax.
An area of your body, usually the arm or groin, is cleaned and numbed with a local numbing medicine (anesthetic). The radiologist makes a small surgical cut in an artery in the area that has been cleaned, and inserts a thin hollow tube called a catheter. The catheter is placed through the artery and carefully moved up into and through the heart chambers and into the pulmonary artery, which leads to the lungs.
The doctor can see live x-ray images of the area on a TV-like monitor, and uses them as a guide.
Once the catheter is in place, dye (contrast material) is injected into catheter. X-ray images are taken to see how the dye moves through the lung arteries. The dye helps highlight any blockages in blood flow.
The catheter is occasionally flushed with saline solution containing a drug called heparin to help keep blood in the tube from clotting.
Your pulse, blood pressure, and breathing are monitored during the procedure.
After the x-rays are taken, the needle and catheter are withdrawn.
Pressure is immediately applied to the puncture site for 10-15 minutes to stop the bleeding. After that time the area is checked and a tight bandage is applied. The leg should be kept straight for 12 hours after the procedure.
How to Prepare for the Test Return to top
You should not eat or drink anything for 4 - 8 hours before the test.
You will be asked to wear a hospital gown and sign a consent form for the procedure. Jewelry should be removed from the area being imaged.
Tell your health care provider:
How the Test Will Feel Return to top
The x-ray table is hard and cold, but you may ask for a blanket or pillow. You may feel a brief sting when the numbing medicine is given and a brief, sharp, stick as the catheter is inserted.
You may feel some pressure as the catheter moves up into the lungs. The contrast dye can cause a feeling of warmth and flushing. This is normal and usually goes away in a few seconds.
You may have some tenderness and bruising at the site of the injection after the test.
Why the Test is Performed Return to top
The test is used to detect blood clots and other blockages in the blood flow in the lung (pulmonary embolism).
Normal Results Return to top
The x-ray will show normal structures for the age of the patient.
What Abnormal Results Mean Return to top
Abnormal results may be due to:
Risks Return to top
Occasionally abnormal cardiac rhythm can develop during the procedure. The doctors will monitor your heart and can treat any abnormal rhythms that develop.
Other risks include:
There is low radiation exposure. X-rays are monitored and regulated to provide the minimum amount of radiation exposure needed to produce the image. Most experts feel that the risk is low compared with the benefits.
Pregnant women and children are more sensitive to the risks of x-rays.
References Return to top
Rubens MB, Dalal P. Pulmonary Circulation and Pulmonary Thromboembolism. 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 26.Update Date: 1/23/2009 Updated by: Benjamin Taragin M.D. Department of Radiology Montefiore Medical Center, Bronx, N.Y. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.