von Willebrand factor antigen assay

The von Willebrand factor antigen is measured for the presence or absence of von Willebrand factor antigen concentration, and von Willebrand disease (vWD) is a decrease or mass of a congenital von Willebrand factor (vWF). A bleeding disorder caused by an abnormality. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: Do not eat too greasy, high-protein foods the day before, and avoid heavy drinking. Normal value 1.Laurell immunospheroidal electrophoresis method 61.6% ~ 126.6%. 2. Monoclonal antibody ELISA method 77.9% ~ 137.1%. 3. ELISA method 0.46 ~ 1.58U / ml. Clinical significance Abnormal result Reduced antibody concentration, common in von Willebrand disease (vWD), is an important indicator for the diagnosis of von Willebrand disease (vWD). Increased antibody concentration, usually after strenuous exercise, excitatory adrenergic receptors, middle and late pregnancy, cerebral angiography, electroshock, insulin-induced hypoglycemia, injection of growth hormone, myocardial infarction, angina pectoris, cerebrovascular disease, small renal Ball disease, uremia, lung disease, liver disease, diabetes, pregnancy-induced hypertension syndrome, major surgery, etc. People who need to be examined have people with symptoms of hemophilia. High results may be diseases: Diabetes precautions Taboo before the test: Do not eat too greasy, high-protein foods the day before the test, to avoid heavy drinking. The alcohol content in the blood directly affects the test results. After 8 pm on the day before the medical examination, you should fast. Requirements for examination: When taking blood, you should relax your mind to avoid the contraction of blood vessels caused by fear and increase the difficulty of blood collection. Inspection process Vascular blood collection was used for testing. Before venous blood collection, carefully check that the needle is securely installed and that there is air and moisture in the syringe. The needle used should be sharp, smooth, ventilated, and the syringe should not leak. Firstly, the skin was disinfected from the inside to the outside and clockwise from the selected venipuncture with a 30g/L iodine swab. After the iodine was volatilized, the iodized trace was wiped out in the same way with a 75% ethanol swab. Fix the lower end of the venipuncture site with the thumb of the left hand, hold the syringe syringe with the thumb and middle finger of the right hand, and fix the needle lower seat with the index finger, so that the bevel of the needle and the scale of the syringe are upward, and the needle is inclined along the vein to make the needle and the skin obliquely penetrate the skin at an angle of 30°. Then, through the vein wall, enter the venous cavity forward at an angle of 5°. After seeing the blood return, the needle will be probed into the spot to avoid the needle slipping out when the blood is collected; but it is not possible to use a deep puncture to avoid hematoma, and immediately remove the cuff. Needle plug can only be pumped out, can not be pushed in, so as to avoid injecting air into the vein to form a gas plug, causing serious consequences. Remove the syringe needle and slowly inject the blood into the anticoagulation tube along the tube wall to prevent hemolysis and foam. Not suitable for the crowd No taboos. Adverse reactions and risks Discomfort: There may be pain, swelling, tenderness, and visible subcutaneous ecchymosis at the puncture site.