ESR equation K value

The K value of the ESR equation is used to correct the effect of hematocrit on ESR. The larger the K value, the stronger the erythrocyte aggregation and the presence of blood stasis in the body. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: After taking the blood sample, send it to the test in time. Normal value 13 to 93 (53 ± 20). ESR = K [-(1-H+1nH)]. In the formula, ESR erythrocyte sedimentation rate, H hematocrit, and 1n natural logarithm. Let R = - (1-H + 1nH). Clinical significance (1) The K value is normal and the erythrocyte sedimentation rate is decreased. (2) The ESR is accelerated and the K value is increased to confirm that the ESR is accelerated. (3) The ESR is normal and the K value is increased to confirm that the ESR is accelerated. (4) The ESR is normal and the K value is normal. The ESR is normal. (5) The K value increases the erythrocyte aggregation. Precautions The main reasons for determining the speed of erythrocyte sedimentation are erythrocyte aggregation and plasma viscosity. When the hematocrit is elevated, the erythrocyte sedimentation rate decreases, the plasma viscosity decreases; the temperature decreases, and the erythrocyte sedimentation rate decreases; the red blood cell surface charge decreases, the red blood cell aggregation increases, and the erythrocyte sedimentation rate increases. Inspection process Intravenous blood collection, does not pollute the skin disinfectant, blood collection is completed within 30s, and mixed with 1.6ml of blood and 0.4ml of anticoagulant (4:1 error should not exceed ± 5%). Determination within 2h, such as storage at 4 ° C should be measured within 6h. Any blood clot found in the specimen cannot be used for erythrocyte sedimentation. Use the immersion tube to draw the mixed whole blood to the scale “0”, and erect the tube on the blood sediment rack (the tilt angle is less than 1°). It is accurate after being placed at room temperature (18～25°C) for 60 minutes without direct sunlight. Check the settlement length. Not suitable for the crowd A patient with hemophilia and severe clotting factor deficiency. Adverse reactions and risks Risk of infection: If you use an unclean needle, you may be at risk of infection.