Hematocrit (HCT)

Hematocrit (HCT), also known as hematocrit and hematocrit, refers to the proportion of red blood cells in a volume (L) of whole blood. How much is related to the number of red blood cells and their size. The clinical significance of hematocrit determination is basically the same as red blood cell count or hemoglobin measurement, and is often used as an indicator for diagnosis and classification of anemia. It can also be used for clinical examination of whether patients need rehydration and electrolyte supplementation. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Anemia patients are common in a variety of reasons. Normal value: Male: 0.40-0.50 Female: 0.37-0.48 Newborn: 0.48-0.68 Above normal: It is common for blood concentration caused by various reasons, such as large-area burns. negative: Positive: Tips: When collecting blood in the vein, when the acupuncture enters the blood vessel, the tourniquet should be removed immediately and blood should be taken to prevent the blood from accumulating and concentrating. Normal value Wen's method: Male: 0.40-0.50 L/L, ie 40%-50% volume. Female: 0.37-0.48 L/L, ie 37%-48% volume. Newborn: 0.48-0.68 L/L, ie 48%-68% volume. Clinical significance The clinical significance of hematocrit determination is basically the same as red blood cell count or hemoglobin measurement, and is often used as an indicator for diagnosis and classification of anemia. It can also be used for clinical examination of whether patients need rehydration and electrolyte supplementation. 1, hematocrit is elevated (1) Seen in normal people who are strenuous or emotional. (2) Blood concentration caused by various reasons, such as large area burns, major surgery, severe diarrhea, massive vomiting and other patients with dehydration or plasma loss. (3) seen in patients with secondary and true erythrocytosis, myocardial infarction patients. 2, hematocrit is reduced (1) Seen in normal pregnant women. (2) Seen in various anemia patients. However, due to the different types of anemia, the size of red blood cells is also different, so the decrease in hematocrit is not necessarily proportional to the decrease in the number of red blood cells. Therefore, it is necessary to combine the number of red blood cells, the amount of hemoglobin and the hematocrit to calculate the average value of red blood cells for reference value. Low results may be diseases: chronic disease anemia, small cell hypochromic anemia results may be high disease: neonatal polycythemia - high viscosity syndrome, iron deficiency anemia precautions Precautions before and after inspection: 1. When collecting blood by vein, when the acupuncture enters the blood vessel, the tourniquet should be removed immediately and blood should be taken again to prevent the blood from being deposited and concentrated. 2, the centrifuge tube and syringe must be dry to prevent hemolysis, patients with hemolytic anemia should pay attention to the results. 3, from the beginning of blood collection to the completion of the test, the whole process is best not to exceed 2h. 4, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection. Inspection process Subjects were venously collected and assayed in time for serum separation. 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.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.