mean red blood cell diameter

Price-Jones plots the measured results into a curve, the Price-Jones curve. However, there are many problems with this method. In addition to the rough method itself; the red blood cells have dried and shrunk due to the use of a dry blood film, so the measured diameter is 8% to 16% smaller than its true diameter. The diameter of cells in different parts of the same blood membrane is also different. Red blood cell morphological variation in anemia, it is more difficult to measure its diameter when it is not a perfect circle. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: not fasting Tips: After blood is drawn, if there is local congestion, use a warm towel after 24 hours to promote absorption. Normal value Normal humans have an average red blood cell diameter of 7.0 to 7.6 μm and an average of 7.33 μm. Clinical significance Abnormal results: (1) Increase the jaundice caused by large cell anemia, emphysema, obstructive jaundice, and liver damage. (2) Reduced in small cell hypochromic anemia, chronic hemolytic jaundice. People who need to be examined have chest tightness, increased air impatience, and symptoms of respiratory failure such as purpura, headache, lethargy, and delirium. Low results may be diseases: high emphysema results may be diseases: aplastic anemia, hemolytic jaundice precautions 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 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. Then the doctor checks the calculation. Not suitable for the crowd Have a coagulopathy such as hemophilia. Adverse reactions and risks Infection: Do not touch the dirt after blood collection. Do not wash your hands immediately to avoid infection.