free heparin time

The free heparin time is also called toluidine blue correction test. In addition to the natural anticoagulant substances (antithrombin and protein C system), the human body can produce pathological anticoagulant substances such as heparin-like substances under pathological conditions. This test is mainly used to detect whether heparin and heparin-like substances are contained in the blood. Basic Information Specialist classification: growth and development check classification: endocrine examination Applicable gender: whether men and women apply fasting: fasting Tips: According to the nutritional status of the whole body, milk, eggs, fruits, soy milk, etc. are given in the meal. Normal value TT is prolonged, and the thrombin time after the addition of toluidine blue or protamine sulfate is restored to normal or shortened by 5 s or more, indicating an increase in heparan or heparin in the test sample. Clinical significance 1. Increased heparin is seen in the treatment of congenital heparin and heparin. 2. Increased heparin-like substances are found in liver diseases, malignant tumors, DIC, anaphylactic shock, and radiation therapy. Precautions Using nitrogen mustard, after X-ray or other irradiation, the patient can produce a heparin-like substance to cause bleeding. Inspection process The irradiation method is used for the detection. 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.