Erythrocyte Sedimentation Rate Measurement Using as a Rapid Alternative to the Westergren Method

Introduction: Erythrocyte sedimentation rate (ESR) remains as one of the most reliable tests in clinical practices. Yet its use is time consuming and requires a large blood sample. The aim of this study was assessing a faster and re-liable method of ESR estimation. Methods: An ESR estimation method was described and performed on 108 patients using capillary tube (micro ESR) and capillary peripheral blood. Micro ESR results at different intervals were meas-ured and compared with Westergren ESR (conventional ESR) estimation by Pearson and Spearman’s coefficients. A regression equation was derived to predict conventional ESR values based on micro ESR results. The agreement of two measurements was demonstrated using the Bland-Altman plot. Results: Micro ESR results at 20 minutes showed the earliest close correlation with conventional ESR results at one hour (r = 0.987). The presented regression equa-tion was able to closely predict ESR values (r2 = 0.974) and the Bland-Altman plot showed an acceptable agreement between converted and conventional ESR measurements. Conclusion: Using capillary tube and capillary blood sam-ple (micro ESR) appears to be a faster, cheaper, more reliable, and precise tool for ESR measurement in the ED. The results have acceptable correlation with conventional ESR, especially at 20 minutes of measurement.