THE INFLUENCE OF BLOOD VOLUME AND STORAGE DURATION ON THE ERYTHROCYTE SEDIMENTATION RATE (ESR) VALUE USING THE WESTERGREN METHOD

Erythrocyte Sedimentation Rate (ESR) Blood volume Storage duration Westergren method

Authors

15 November 2025

Downloads

Background: Hematological examination is conducted to determine the condition of blood and its components, which are used to establish a diagnosis, support a diagnosis, make a differential diagnosis, monitor disease progression, assess the severity of an illness, and determine the initial prognosis of a disease. Phlebotomy procedures in the pre-analytical stage are not always successful and sometimes encounter failure. Inappropriate anticoagulant administration can lead to erroneous hematological examination results, including Erythrocyte Sedimentation Rate (ESR) examination results. Purpose: This research aims to examine the influence of blood volume and storage duration on the Erythrocyte Sedimentation Rate (ESR) value using the Westergren method. Method: The Westergren method utilizes 5 venous blood samples with a ratio of blood volume to 3.8% anticoagulant at 4 : 1, 3 : 1, and 2 : 1, with sample storage durations of 0 and 3 hours at room temperature. Result: The average ESR values with a ratio of 4 : 1, at 0 hours, were 5.20 mm/hour and at 3 hours were 3.60 mm/hour. The average ESR values with a ratio of 3 : 1, at 0 hours, were 6.20 mm/hour and at 3 hours were 4.40 mm/hour. The average ESR values with a ratio of 2 : 1, at 0 hours, were 7.60 mm/hour and at 3 hours were 5.60 mm/hour. Conclusion: There is a significant influence of blood volume (p-value < 0.05) and storage duration (p-value = 0.05) on the Erythrocyte Sedimentation Rate (ESR) value using the Westergren method.