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The factor XII assay is a blood test to measure the activity of factor XII -- one of the substances involved in blood clotting.
Alternative NamesHageman factor assay
How the test is performedBlood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The area is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm. 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, a sharp tool called a lancet may be used to puncture the skin and make it bleed. The blood collects into a small glass tube called a pipette, or onto a slide or test strip. A bandage may be placed over the area if there is any bleeding.
How to prepare for the testThere is no special preparation needed for adults.
How the test will feelWhen 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.
Why the test is performedYour doctor may order this test if you had abnormal results on the partial thromboplastin time (PTT) blood-clotting test.
Normal ValuesA normal value is 50 - 200% of the laboratory control or reference value.
Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What abnormal results meanDecreased factor XII activity may indicate:
- Inherited (congenital) deficiency of factor XII
- Liver disease
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.
Other risks associated with having blood drawn are slight but may include:
- Excessive bleeding
- Fainting or feeling light-headed
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)
People with factor XII deficiency usually do not have excess bleeding. Factor XII does not appear to be needed for clots to form during the normal process of stopping bleeding.
ReferencesKessler C. Hemorrhagic disorders: Coagulation factor deficiencies. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 180.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoThe factor XII assay is a blood test to measure the activity of factor XII -- one of the substances involved in blood clotting.
Alternative NamesHageman factor assay
How the test is performedA blood sample is needed. For information on how this is done, see: Venipuncture.
How to prepare for the testThere is no special preparation needed for adults.
How the test will feelWhen 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.
Why the test is performedYour doctor may order this test if you had abnormal results on the partial thromboplastin time (PTT) blood-clotting test, or if one of your blood relatives was diagnosed with factor XII deficiency.
Normal ValuesA normal value is 50 - 200% of the laboratory control or reference value.
Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.
What abnormal results meanDecreased factor XII activity may indicate:
- Inherited (congenital) deficiency of factor XII
- Liver disease
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.
Other risks associated with having blood drawn are slight but may include:
- Excessive bleeding
- Fainting or feeling light-headed
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)
People with factor XII deficiency usually do not have excess bleeding. Factor XII does not appear to be needed for clots to form during the normal process of stopping bleeding in your body. However, one of the tests used to measure blood clotting in a test tube does require factor XII.
ReferencesGailani D, Neff AT. Rare coagulation factor deficiencies. In: Hoffman R, Benz EJ Jr., Shattil SJ, et al, eds. Hoffman Hematology: Basic Principles and Practice. 5th ed. Philadelphia, Pa: Churchill Livingstone Elsevier; 2008:chap 127.
Kessler C. Hemorrhagic disorders: Coagulation factor deficiencies. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 180.
Reviewed ByReview Date: 02/28/2011
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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What is the highest common factor of cxx and cclii in roman numerals?
If the highest common factor of 120 and 252 is 12 10*12 = 120 21*12 = 252 Then it follows that the highest common factor of CXX and CCLII is XII X*XII = CXX XXI*XII = CCLII
What is the cpt code for clotting factor XII (Hageman factor) for excessive bleeding menopausal onset?
627.0
What are the 13 clotting factors?
factor I (fibrinogen), factor II (prothrombin), factor III (tissue thromboplastin), factor IV (calcium), factor V (proaccelerin), factor VI (no longer considered active in hemostasis), factor VII (factor-vii), factor VIII (antihemophilicfactor), factor IX (plasma thromboplastincomponent; Christmas factor), factor X (stuart-factor-stuart-prower-factor), factor XI (plasma thromboplastinantecedent), factor XII (factor-xii), factor XIII (fibrin stabilizing factor).
What initiates coagulation?
When the blood vessel is injured, so is the endothelium, so it releases the endothelium tissue factor (TF), which complexes with factor VII, activating it, which then activates factor X and IX and the rest of the cascade continues.Collagen is also exposed to a molecular, called high molecular weight kininogen (HMWK), prekallikrein and Hageman factor (factor XII), forming a complex. Prekallikrein is converted to Kallikrein and factor XII is activated to produced factor XIIa, which then activates factor XI and then factor X (the common factor between those two pathways), and the rest of the cascade continues, till the formation of the blood clot.
What does the roman numberal xii mean?
xii or XII = 12
What does XII mean in roman numeral?
In Roman numerals xii or XII are both equivalent to 12
What are the 12 factors of blood clot?
http://web.indstate.edu/thcme/mwking/blood-coagulation.html Factor I = Fibrinogen Factor II = Prothrombin Factor III = Tissue factor Factor IV = Calcium Factor V = Labile factor Factor VI - Does not exist as it was named initially but later on discovered not to play a part in blood coagulation. Factor VII = Stable factor Factor VIII = Antihemophilic factor A Factor IX = Antihemophilic factor B or Christmas factor (named after the first patient in whom the factor deficiency was documented) Factor X = Stuart Prower factor Factor XI = Antihemophilic factor C Factor XII = Hageman factor Factor XIII = Fibrin stabilising factor
What is XII-MM-XII?
XII-MM-XII is a Roman numeral representation of the date December 12, 12.
Who was the parents of Cleopatra?
Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.Cleopatra's father was Ptolemy XII. Her mother is unknown.
Who is Cleopatra the doughter of?
Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.Cleopatra was the daughter of Ptolemy XII, nicknamed Auletes.
What is 12 in Roman numerals?
12 = XII
Roman numeral for 12?
xii or XII = 12
