| |
|
Click on the first letter in the test name:
|
Factor XII assay partial-thromboplastin-time-ptt
Definition
Factor XII assay is a blood test to measure the activity of factor XII -- one of the substances involved in blood clotting.
Alternative Names
Hageman factor assay
Why the Factor XII assay is Performed
Your doctor may order this test if you had abnormal results on the partial thromboplastin time (PTT) blood-clotting test.
How the Factor XII assay 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. An elastic band is placed around the upper arm to apply pressure and cause the vein to swell 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.
In infants or young children, 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. A bandage may be applied to the puncture site if there is any bleeding.
How to Prepare for the Factor XII assay
There is no special preparation needed for adults.
How the Factor XII assay Will Feel
When the needle is inserted to draw blood, you may feel moderate pain, or only a prick or stinging sensation. Afterward, there may be some throbbing.
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.
Risks
- Excessive bleeding
- Fainting or feeling light-headed
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)
- Multiple punctures to locate veins
Considerations
Factor XII deficiency is not normally associated with symptoms of too much bleeding. In addition, factor XII does not appear to be necessary for the formation of clots during the normal process of stopping bleeding.
Normal Results
A normal value is 50-200% of the laboratory control or reference value.
What Abnormal Results Mean
Decreased factor XII activity may indicate:
- Congenital deficiency of factor XII
- Liver disease
Email to a Friend
Typical mistypes for Factor XII assay
dactor xii assay, cactor xii assay, vactor xii assay, gactor xii assay, tactor xii assay, ractor xii assay, fzctor xii assay, fsctor xii assay, fwctor xii assay, fqctor xii assay, faxtor xii assay, favtor xii assay, faftor xii assay, fadtor xii assay, facror xii assay, facfor xii assay, facgor xii assay, facyor xii assay, fac6or xii assay, fac5or xii assay, factir xii assay, factkr xii assay, factlr xii assay, factpr xii assay, fact0r xii assay, fact9r xii assay, factoe xii assay, factod xii assay, factof xii assay, factot xii assay, facto5 xii assay, facto4 xii assay, factor zii assay, factor cii assay, factor dii assay, factor sii assay, factor xui assay, factor xji assay, factor xki assay, factor xoi assay, factor x9i assay, factor x8i assay, factor xiu assay, factor xij assay, factor xik assay, factor xio assay, factor xi9 assay, factor xi8 assay, factor xii zssay, factor xii sssay, factor xii wssay, factor xii qssay, factor xii aasay, factor xii azsay, factor xii axsay, factor xii adsay, factor xii aesay, factor xii awsay, factor xii asaay, factor xii aszay, factor xii asxay, factor xii asday, factor xii aseay, factor xii asway, factor xii asszy, factor xii asssy, factor xii asswy, factor xii assqy, factor xii assat, factor xii assag, factor xii assah, factor xii assau, factor xii assa7, factor xii assa6, actor xii assay, fctor xii assay, fator xii assay, facor xii assay, factr xii assay, facto xii assay, factorxii assay, factor ii assay, factor xi assay, factor xi assay, factor xiiassay, factor xii ssay, factor xii asay, factor xii asay, factor xii assy, factor xii assa, afctor xii assay, fcator xii assay, fatcor xii assay, facotr xii assay, factro xii assay, facto rxii assay, factorx ii assay, factor ixi assay, factor xi iassay, factor xiia ssay, factor xii sasay, factor xii asasy, factor xii assya, ffactor xii assay, faactor xii assay, facctor xii assay, facttor xii assay, factoor xii assay, factorr xii assay, factor xii assay, factor xxii assay, factor xiii assay, factor xiii assay, factor xii assay, factor xii aassay, factor xii asssay, factor xii asssay, factor xii assaay, factor xii assayy, etc.
|
|
|
|
|
|
