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Antithrombin IIIDefinition This is a blood test that measures the amount of antithrombin III (AT III), a protein that helps prevent and regulate blood clotting. How the test is performed Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The puncture site is cleaned with antiseptic, and an elastic band is placed around the upper arm to apply pressure and restrict blood flow through the vein. This causes veins below the band to fill with blood. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. During the procedure, the band is removed to restore circulation. Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding. For an infant or young child: The area is cleansed with antiseptic and punctured with a sharp needle or a lancet. The blood may be collected in a pipette (small glass tube), on a slide, onto a test strip, or into a small container. Cotton or a bandage may be applied to the puncture site if there is any continued bleeding. How to prepare for the test The health care provider may limit certain medications shortly before the test to assure an accurate sample. Usually this will include monitoring drugs that may affect the amount of antithrombin in the bloodstream. For infants and children: The preparation you can provide for this procedure depends on your child's age, previous experiences, and level of trust. For specific information regarding how you can prepare your child, see the following topics:
How the test will feel When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing. Why the test is performed This test is indicated when there are repeated episodes of blood clots or when individuals do not respond to anticoagulant medications. It can help to determine the cause of hypercoagulation (increased blood coagulation). Normal Values The normal range is 0.20-0.45 mg/ml (milligrams per milliliter). What abnormal results mean Lower-than-normal AT III may indicate an increased risk of clotting. Examples of disorders and/or conditions associated with increased blood clotting include:
What the risks are
Special considerations Birth control pills can cause a slight decrease in AT III levels. Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others. Page Content: A-Th3; AT III ; iii impossible mission; iii sidekick; iii praxis; iii man x; hank iii williams; iii mi; age empire iii; hank iii; iii warcraft; hedonism iii; iii; episode iii star war; i iii m; iii mobile sidekick t; iii napoleon; iii saw; iii lupin; iii xmen; iii richard; iii impossible kanye mission west; iii star war; iii napoleon wife; diablo iii; george iii king; cloner dvd iii; iii vx; iii pentium; civilization iii; 10x50mm 299.99 camo i ii iii leupold new olympic river vx vx vx wind; iii war world; 3a iii impossible mission; cheat iii warcraft; iii niarchos stavros; hypertech iii power programmer; free gps ii iii iv leupold mark model navigation now scope shipped ups vx vx; episode iii; baseball division iii; i ii iii lps new vx vx vx; hypertech iii programmer; fantasy final iii; calibur iii soul; iii malignant mesothelioma stage survival; age cheat empire iii; estate iii real; iii rocky; episode iii revenge sith star war; auto grand iii theft; iii impossible mission review; iii new sidekick; emperor iii innocent pope under; elder iii morrowind scroll; frozen iii throne warcraft; godfather iii; hedo iii; iii last man stand x; iii jurassic park; iii rocket triumph; hunter iii silent; iii impossible mission soundtrack; baseball division iii ncaa; cat hi high iii puma race top; cat hi high iii puma race racing shoes top; iii suntide; iii man spider; iii superman; bee dsp iii pop radar; iii man trailer x; age download empire full iii; iii innocent pope; iii man movie x; iii map warcraft; iii t; arena iii quake; iii mark; doom iii; 2gb compact extreme flash iii retail sandisk; century iii mall; fork iii; division iii ncaa; caesar iii; george iii; iii palm; grandia iii; iii kotor; edward iii; elder iii scroll; hero iii magic might; iii lebron zoom; ii iii leupold model vx vx; iii niarchos picture stavros; iii nike shox turbo; iii lebron; iii impossible mission trailer; episode iii star trailer war; cheat civilization iii; iii jordan; iii wais; gta iii; cd iii key warcraft; age cheat code empire iii; th3; plan th3; christ ion p s th3; th3 through wall |
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