Circulating red blood cell mass

The reserve of red blood cells is small, only about 3% of the blood circulation, so the fluctuation in the blood is small, the emergency is poor, and bone marrow hematopoiesis needs to be replenished in time after blood loss. In pathological conditions, this balance can be destroyed for a variety of reasons, leading to disease. It is clinically possible to diagnose or differentially diagnose anemia by detecting multiple parameters of red blood cells. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Warm reminder: The blood cell count results vary greatly in the afternoon, more in the afternoon, more stable in the morning, in addition to emergency, it is generally appropriate to take blood in the morning. Normal value 51Cr labeled red blood cell method: 29.1 ~ 30.3ml / kg. Clinical significance (1) elevated: polycythemia vera. (2) Reduction: all types of anemia. Low results may be diseases: high aplastic anemia results may be diseases: secondary polycythemia, polycythemia The trace blood taken at the finger and other parts has many factors affecting the measurement results. Therefore, the China Medical Inspection Branch recommends that venous blood should be taken as much as possible. The blood cell count results changed a lot in the afternoon, more in the afternoon, and more stable in the morning. In addition to the emergency department, it is better to take blood in the morning. Inspection process Subjects were venously collected and assayed in time for serum separation. It was determined by the 51Cr-labeled red blood cell method. 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.