Mean corpuscular hemoglobin content (MCH)

The mean erythrocyte hemoglobin content (MCH) is the average amount of hemoglobin contained in each red blood cell, expressed in picograms (pg). MCH = Hb content / millions of red blood cells, clinically used for morphological classification of anemia. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: When you take blood, you should relax your mind, avoid the contraction of blood vessels caused by fear, and increase the difficulty of blood collection. Normal value Manual method: 27-31 pg (1.7-2.1 fmol). Blood cell analyzer method: 27-34pg. Newborn: 23-30 pg (1.5-2.0 fmol). Clinical significance Decrease: it is simple small cell anemia, small cell hypochromic anemia. Also seen in iron deficiency, chronic blood loss, oral inflammatory diarrhea, gastric acid deficiency, pregnancy, thalassemia, iron erythrocyte anemia, megaloblastic anemia. Elevation: often a large cell anemia. Found in pernicious anemia, folate deficiency, chronic hunger, reticulosis, hypothyroidism, aplastic anemia. Precautions 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. Guests with a history of fainting should 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 The examination process: blood is drawn, blood is taken for examination, and venous blood is generally taken, and blood is drawn by a doctor or a nurse. The amount of blood drawn is determined according to the difference of the test content and the number of items. The blood volume is usually 2-20 ml, and the maximum is not more than 50 ml, and then the doctor performs calculation and examination. Not suitable for the crowd Generally no taboos. Adverse reactions and risks Risk of infection: If you use an unclean needle, you may be at risk of infection.

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