clotting time

Clotting time (CT) refers to the time when blood leaves the blood vessels and solidifies in vitro. It is different from the bleeding time, mainly to determine whether the various coagulation factors in the endogenous coagulation pathway are lacking, whether the function is normal, or whether there is an increase in anticoagulant substances. According to the source of the specimen, the clotting time is determined by capillary blood collection and venous blood collection. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Thrombotic diseases such as myocardial infarction, unstable angina, cerebrovascular disease and the like. Normal value: Glass tube method: 5-10min Plastic tube method: 10-19min Silicon tube method: 15-32min Above normal: Prolonged to be seen in hemophilia. negative: Positive: Tips: After 8 pm on the day before the medical examination, you should start fasting for 12 hours, so as not to affect the test results. Normal value a) Glass tube method for 5 to 10 minutes. b) Plastic tube method for 10 to 19 minutes. c) Silicon tube method for 15 to 32 min. Clinical significance Abnormal result Prolonged clotting time is seen in a) Congenital clotting factor deficiency such as various types of hemophilia. b) Acquired (acquired) clotting factor deficiency, such as severe liver disease, vitamin K deficiency and the like. c) Increased fibrinolytic activity such as secondary, primary fibrinolysis, and the like. d) Anticoagulant substances in the blood circulation such as anti-Factor VIII or Factor IX antibodies, and disseminated intravascular coagulation (DIC) early heparin treatment. Shortening of clotting time is seen in a) Hypercoagulable state, such as increased activity of procoagulant into human blood and clotting factors. b) thrombotic diseases such as myocardial infarction, unstable angina pectoris, cerebrovascular disease, diabetic vasculopathy, pulmonary infarction, deep vein thrombosis, pregnancy-induced hypertension syndrome and nephrotic syndrome. People who need to be examined are prone to bleeding, fever, and poor wound healing. There are family-derived congenital coagulation factors in the family. High results may be diseases: precautions for gastrointestinal bleeding in children Before inspection: 1, do not eat too greasy, high-protein food the day before the blood, to avoid heavy drinking. The alcohol content in the blood directly affects the test results. 2. After 8 pm on the day before the medical examination, you should start fasting for 12 hours to avoid affecting the test results. 3, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection. After inspection: 1. After blood is drawn, local compression is required at the pinhole for 3-5 minutes to stop bleeding. Note: Do not rub, so as not to cause subcutaneous hematoma. 2, the pressing time should be sufficient. There is a difference in clotting time for each person, and some people need a little longer to clotting. Therefore, when the surface of the skin appears to be bleeding, the compression is stopped immediately, and the blood may be infiltrated into the skin due to incomplete hemostasis. Therefore, the compression time is longer to completely stop bleeding. If there is a tendency to bleed, the compression time should be extended. 3, after the blood draw symptoms of fainting such as: dizziness, vertigo, fatigue, etc. should immediately lie down, drink a small amount of syrup, and then undergo a physical examination after the symptoms are relieved. 4. If there is localized congestion, use a warm towel after 24 hours to promote absorption. Inspection process Inspection method: draw blood. Not suitable for the crowd Have a coagulopathy such as hemophilia. Adverse reactions and risks Subcutaneous hemorrhage: subcutaneous hemorrhage due to less than 5 minutes of compression time or blood draw technique.