Neutrophil ratio (NEUT%)

The neutrophil ratio (NEUT%) refers to the percentage of neutrophils in the blood. Neutrophils play an important role in the blood's non-specific cellular immune system. They are in the body's defense against microbial pathogens, especially in the first line of purulent bacterial invasion. When inflammation occurs, they are chemotactic substances. Attracted to the site of inflammation. Because they obtain energy by glycolysis, they survive in the absence of oxygen in the case of swelling and poor blood flow, where they form cytotoxic membranes that destroy bacteria and nearby tissues. Since neutrophils contain a large amount of lysosomal enzymes, they can decompose bacteria and tissue fragments that are engulfed into cells, so that invading bacteria are surrounded and destroyed, preventing pathogenic microorganisms from spreading in the body. When the neutrophils themselves disintegrate, the release of each lysosomal enzyme can dissolve the surrounding tissue to form an abscess. Basic Information Specialist classification: Infectious disease examination and classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: Actively cooperate with the doctor during the examination. Normal value Reference Male: 50-70%; Female: 50-70%; Newborn: 50-70%. Clinical significance Causes of high incidence: acute suppurative bacterial infection, granulocyte leukemia, acute hemorrhage, severe tissue damage or blood cell destruction, sepsis, myocardial infarction, uremia, diabetic ketoacidosis and so on. Causes of low incidence: typhoid fever, paratyphoid fever, viral infection, malaria, agranulocytosis, chemical poisoning, X-ray and radiation exposure, anticancer drug therapy, autoimmune disease and hypersplenism. Low results may be diseases: agranulocytosis, acute agranulocytosis, high results of Colorado fever, possible diseases: hypersplenism, epidermococcus pneumonia, neutropenia precautions The classification of white blood cells is greatly changed by factors such as technical factors and cell distribution factors, so the dispersion of classification counts is large, and the proportion of neutrophils and lymphocytes, which account for a large proportion in the classification, is normally distributed, accounting for a small proportion. Such as eosinophils, basophils and monocytes are Powson distribution. Inspection process (1) Blood collection: 1 small droplet on one end of the slide glass, with a push piece to tilt around 35 ° ~ 45 ° to leave a proper amount of gaps, can separate the thin blood of the head, body and tail. The length of the blood film is not less than 2.5 cm, and the remaining space to the other end of the slide is about 1 cm. The blood film is dried and stained. (2) Wright's Giemsa composite staining method: flat blood sample on the staining rack, add 3 to 5 drops of staining solution, immediately cover the blood film, add about 5 to 10 drops of buffer after about 30s, gently shake the glass The tablets or lightly blow the mixture to mix the dye solution with the buffer solution. After 5 to 10 minutes, the dye solution is washed away with water and dried for microscopic examination. (3) Rapid method: place the rapid dyeing liquid A and liquid B in the appropriate size dyeing tank, immerse the blood film in the liquid for 30s, wash it, then immerse it in the liquid for 30s, wash it, and dry it for microscopic examination. (4) Microscopic examination: Select the junction of the meninges and tails, and the red blood cells have not overlapped with oil mirrors. The examination should have a certain direction from top to bottom and left and right, and take into account the edges of both sides of the long film of the blood film, otherwise it will affect various cells. Detection rate. Count 100 to 200 white blood cells, classify them according to their morphology, and find the percentage. 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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