blood coagulation test

The hemagglutination test, also known as the Coombs test, is a method of detecting antibodies against incomplete red blood cells. It is divided into a direct Coombs test and an indirect Coombs test. The purpose of the direct test is to examine incomplete antibodies on the surface of red blood cells. The purpose of the indirect test is to examine the presence of free incomplete antibodies in the serum. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: Negative is generally normal. Positive: Common in neonatal hemolysis, autoimmune hemolysis, idiopathic autoimmune anemia and iatrogenic hemolytic disease. Tips: Forbidden to overeating, you should take blood on an empty stomach. Normal value The result was negative. Clinical significance Abnormal result It is commonly used for the detection of neonatal hemolysis, autoimmune hemolysis, idiopathic autoimmune anemia and iatrogenic hemolytic disease. This test is mostly used to detect maternal Rh (D) antibodies in order to detect and avoid the occurrence of neonatal hemolysis early. Blood group antibodies produced by blood transfusions that are incompatible with red blood cells can also be detected. People who need to be examined: Both newborns and pregnant women need to be tested, and patients with related hemolysis need to be tested for hemagglutination. Precautions Taboo before the test: taboo overeating, should be taken on an empty stomach. Requirements for inspection: The inspector is in a calm state. Before the blood collection, the blood collection site should not be tapped. It is necessary to smoothly “see the blood at a shot” to avoid mixing into the tissue fluid or hemolysis. Inspection process Direct Coombs test: The globulin-containing reagent is directly added to the cell suspension of the erythrocyte surface-bound antibody, and cell agglutination can be seen. The slide can be used for statutory determination, or the test tube method can be used for semi-quantitative analysis. Indirect Coombs test: used to detect incomplete antibodies in free serum. The test serum is combined with red blood cells having the corresponding antigenicity of the incomplete antibody to be tested. Visible red blood cell agglutination can occur with the addition of anti-globulin antibodies. Not suitable for the crowd 1. Patients who have taken contraceptives, thyroid hormones, steroid hormones, etc., may affect the results of the examination and prohibit patients who have recently taken the drug history. 2, special diseases: patients with hematopoietic function to reduce disease, such as leukemia, various anemia, myelodysplastic syndrome, etc., unless the examination is essential, try to draw less blood. Adverse reactions and risks 1, subcutaneous hemorrhage: due to pressing time less than 5 minutes or blood draw technology is not enough, etc. can cause subcutaneous bleeding. 2, discomfort: the puncture site may appear pain, swelling, tenderness, subcutaneous ecchymosis visible to the naked eye. 3, dizzy or fainting: in the blood draw, due to emotional overstress, fear, reflex caused by vagus nerve excitement, blood pressure decreased, etc. caused by insufficient blood supply to the brain caused by fainting or dizziness. 4. Risk of infection: If you use an unclean needle, you may be at risk of infection.

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