capillary fragility test

Other names include capillary fragility test and beam arm test. The test applied pressure to the capillaries and observed the comprehensive hemostasis of the blood vessel wall, vascular endothelial cells, and platelets. The normal blood vessel wall has a certain tolerance to blood pressure. If the blood vessel fragility is increased or the endometrium is damaged, and the platelet volume or quality is abnormal, most bleeding points can occur under normal pressure, but this phenomenon does not occur in normal people. Basic Information Specialist Category: Cardiovascular Examination Category: Other Examinations Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: Male: 0-5 women: 0-10 Above normal: negative: Normal when negative. Positive: Capillary defects such as hereditary hemorrhagic telangiectasia, scurvy, allergic purpura, senile purpura, etc. when positive. Tips: Please relax when checking. Normal value 6.7kPa, 15min (minutes) M (male) 0-5 new bleeding points F (female) 0-10 new bleeding points. Clinical significance Abnormal result 1 capillary defects such as hereditary hemorrhagic telangiectasia, scurvy, allergic purpura, senile purpura, etc., this test is more valuable. 2 Platelet-deficient diseases Primary thrombocytopenic purpura (ITP), thrombocytopenia, von Willebrand disease (VWD), and platelet disease. 3 Other occasionally seen in severe coagulation abnormalities; diseases caused by capillary damage. Such as liver disease, uremia, thrombotic thrombocytopenic purpura. Need to check the crowd 1. Thrombocytopenia caused by various causes. 2. Hereditary telangiectasia. 3. Platelet dysfunction diseases such as vascular hemophilia. 4. Allergic purpura, scurvy, senile purpura. 5. Acute infection and poisoning and other factors on the capillary wall damage sepsis, uremia. 6. Severe coagulation disorders. 7. The fibrinolytic system is hyperactive. 8. Liver lesions, diabetes, hypertension, etc. Positive results may be diseases: allergic purpura in the elderly, allergic purpura nephritis in children, hemorrhagic disease in children, allergic purpura, vitamin C deficiency in children, primary thrombocytopenia in children, renal anemia in children, allergic purpura in small intestine, Acquired platelet dysfunction, nasal bleeding precautions Taboo before inspection: 1. Check the upper arm for bleeding, hematoma and ulcers. 2. Items preparation sphygmomanometer, marker pen, ruler. 3. Choose a well-lit and appropriate location. Inspection requirements: This test is slightly sensitive to the detection of defects in the capillary wall than to check for defects in the platelets. Many patients with abnormal blood vessels or platelets and bleeding symptoms can be false negative in this test, and many asymptomatic people can be positive. Inspection process Operation process 1. Draw a circle with a diameter of 5 cm at 4 cm below the elbow socket of the forearm. Observe the bleeding point in the circle carefully. If there is a bleeding point, mark it with a marker. 2. Attach the sphygmomanometer cuff to the upper arm of the side, first measure the blood pressure, then maintain the blood pressure between systolic and diastolic pressure for 8 minutes, then release the pressure. 3. After releasing the pressure for 5 minutes, calculate the number of new bleeding points in the circle. 4. Judgment of results: 0~5 males and 0-10 females. If the bleeding points are >10 positive, 10~50 are "+", >50 are "++", forearm extension and Those with bleeding on the back of the hand are "+++", and those with bleeding points or purple spots on the forearm flexion, extension, and arm are "++++". Not suitable for the crowd 1. Hemophilia A and hemophilia B. 2. There is no need to do this test when there are obvious signs of purpura. 3. This test is not required when there are obvious signs of skin bleeding. 4. The patient's vital signs are unstable and in an endangered state. It is not advisable to do this test. Adverse reactions and risks An infection may occur.