Lymphocyte count (LY)

Lymphocytes are a type of white blood cells. Produced by lymphoid organs, it is an important cellular component of the body's immune response function. White blood cell differential count refers to counting and calculating the percentage of different types of white blood cells. Reduce the incidence of immunodeficiency in cells, acute phase of certain infectious diseases, radiation sickness, application of adrenocortical hormone, anti-lymphocyte globulin therapy, lymphopenia, immunodeficiency disease, gamma globulin deficiency and so on. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: Do not eat too greasy, high-protein foods the day before the blood draw, avoid heavy drinking. Normal value Lymphocytes 0.2 to 0.4 (20% to 40%). Clinical significance Increased in viral infection, tuberculosis, whooping cough, infectious mononucleosis, infectious lymphocytosis, lymphocytic leukemia, lymphosarcoma. Reduce the incidence of immunodeficiency in cells, acute phase of certain infectious diseases, radiation sickness, application of adrenocortical hormone, anti-lymphocyte globulin therapy, lymphopenia, immunodeficiency disease, gamma globulin deficiency and so on. Low results may be diseases: high lymphopenia may result in diseases: lupus vulgaris, mediastinal non-Hodgkin's lymphoma, mediastinal non-Hodgkin's malignant lymphoma considerations First, the precautions before blood draw 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 physical examination, fasting should be done to avoid affecting the detection of indicators such as blood glucose in the second sky. 3, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection. If you have a history of fainting, please explain in advance and we will make special arrangements; Second, should pay attention after blood draw 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 (1) Take a small drop of blood on one end of the slide, and use a pusher to push the circumference around 35~45° to leave a proper amount of voids to distinguish 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 There are patients with clotting disorders such as hemophilia. Adverse reactions and risks Bleeding: After blood collection, use sterile cotton lump or other disinfecting hemostatic articles to tighten the needle to stop bleeding, especially for patients with coagulopathy should be given sufficient time to avoid bleeding.