<![CDATA[The Erythrocyte sedimentation rate is a routine blood test performed to monitor the course of the disease where high values are likely to be associated with the presence of inflammation. ICSH (International Council for Standardization in Hematology) recommends the Westergren method as a method for examining LED with several developments in terms of the anticoagulants and diluents used. Anticoagulants that can be used are Sodium Citrate 3,8% anticoagulant and EDTA (Ethylene Diamine Tetra-Acetid-Acid) anticoagulant. This study aims to determine the differences in the erythrocyte sedimentation rate of the westergren method using EDTA anticoagulants and sodium citrate 3.8%.This study uses primary data collection techniques with comparative research type. The research was conducted at the Health Analyst Laboratory of Poltekkes Kemenkes Surabaya, in January-April 2021. The sample of the study was 50 menstruating women who had met several criteria, who would be examined for LED values using the Westergren method using EDTA anticoagulants in purple vacuum tubes and sodium citrate 3,8 % on a black vacuum tube.The results showed that the mean of sedimentation rate with EDTA anticoagulant was 27.66 mm/hour and 22.04 mm/hour for sodium citrate 3,8% anticoagulant. The statistical test was carried out by using the paired sample t-test which showed the sig (p) value = 0.000 0.05, so it could be concluded that there was a difference between the EDTA anticoagulant LED and the sodium citrate anticoagulant LED. Thus the EDTA anticoagulant can still be used as an anticoagulant in examining the erythrocyte sedimentation rate]]>
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