blood flow test

Hemorheological examination includes more than 10 indicators such as whole blood specific viscosity, whole blood reduction viscosity, plasma viscosity, red blood cell electrophoresis time, platelet electrophoresis time, fibrinogen determination, erythrocyte sedimentation rate and red blood cell deformability. It mainly reflects changes in blood flow, stagnation and blood viscosity due to changes in blood components. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Included items: platelet electrophoresis time measurement, plasma viscosity (PV), fibrinogen determination, whole blood reduction viscosity, whole blood specific viscosity, red blood cell rheological properties detection, erythrocyte electrophoresis time, erythrocyte sedimentation rate, erythrocyte sedimentation rate (ESR) Tip: Avoid exercise and quit smoking. Do not eat too greasy, high-protein foods the day before, and avoid heavy drinking. Normal value No abnormalities were negative for each test. Clinical significance Abnormal result If the hematocrit is increased, it means that the blood is thick and sticky. In addition to cerebrovascular disease, it is also seen in polycythemia. If the hematocrit is reduced, it means that the blood is thinner and the viscosity of whole blood is also decreased, which means that the body has blood loss or anemia. Increased viscosity of whole blood suggests increased hematocrit or plasma viscosity, increased red blood cell aggregation, poor red blood cell deformability or elasticity, and hardened blood vessel wall. Its increase is common in the following diseases, such as cerebrovascular disease, polycythemia, coronary heart disease, diabetes, hypertension, chronic bronchitis, vasculitis, pulmonary heart disease, connective tissue disease activity, chain hemoglobin, leukemia and the like. The reduction of viscosity of whole blood is increased, except for cerebrovascular disease, which is mainly seen in macroglobulinemia and leukemia. Other meanings are the same as whole blood viscosity. Prolonged electrophoresis time is common in cerebrovascular disease, coronary heart disease, arteriosclerosis, bone marrow disease, lupus erythematosus, hyperlipidemia and the like. ESR is related to plasma specific gravity, viscosity, and aggregation between red blood cells. The K value of the erythrocyte sedimentation rate is greatly dependent on the hematocrit of the erythrocyte sedimentation rate. The blood sulcus is high, the erythrocyte sedimentation rate is normal, and the blood squash is low. Therefore, through the formula calculation, the K value of blood sedimentation which excludes the influence of blood cell pressure is obtained. Fibrinogen concentration increases plasma viscosity and is proportional. When blood coagulates, fibrinogen polymerizes into fibrin polymers, which have a "bridge" between fibrin. Play an important role in arterial thrombosis. People who need to be examined: middle-aged and elderly people, with limb pain, swelling, superficial venous engorgement and cords that can be touched along the vein. Normal or sub-healthy people such as those with high work pressure, psychological imbalance, overnutrition or malnutrition, irregular living, and healthy people over 30 years old. Positive results may be diseases: thrombosis, blood thickening, elderly watershed cerebral infarction, necrotizing vasculitis, thromboangiitis obliterans, cerebral infarction in watershed area, arteriosclerosis, thrombophlebitis Pre-inspection contraindications: The patient is required to be in a quiet state, and the diet is in a daily state. Avoid exercise and quit smoking. Do not eat too greasy, high-protein foods the day before, and 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. Allow the suspension of various drugs to avoid the effects of the test results before sampling. 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. After taking blood, please stand slowly and be careful to fall (if you have a history of fainting, please inform the staff before blood collection). After taking blood, please press the needle eye until it does not bleed. Inspection process 5 ml of fasting venous blood in the morning, anticoagulated with heparin or EDTA salt, measured within 4 hours. 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 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.