ا.م.د. رحاب صبحي رمضان
  • Evaluation Time Reduction in Erythrocyte Sedimentation Rate Test Both Conversion and Capillary Tube Methods
  • Early reading of the ESR (Erythrocyte Sedimentation Rate) are described to predict the one – hour results. Calculating the 60 – minutes ESR
    by linear regression and extrapolation from 15, 30, and 45 minutes results using microprocessor for 500 samples was taken randomly to
    ensure a wide range of results. The correlation increased as the time is nearer to 60 minutes. The mean r – value was 0.937 ± 0.006.
    Regarding the ESR level of 30-90 mm group, results showed the highest agreement between the observed and calculated values and the least
    was for ≤ 30 mm samples, mean r – value 0.590 ± 0.075. The augury of two hours ESR from the one hour reading, the highest ESR has the
    lowest correlation, in contrary to the lowest reading group. Results obtained using micro ESR at time intervals of 5 minutes showed that the
    best r – value was at 30 minutes with p – value ≤ 0.05, showed a good relationship between Westergren and micro ESR and the former
    method can be substituted by micro ESR to limit and required blood for this test.
    In conclusion: saving time in finding out the expected one hour ESR from 30 minutes or more reading is practically accepted. We
    recommend to spot a cut point at 30 minutes sedimentation to indicate high ESR as well as the two hours ESR reading for high ESR diseases,
    and the Westergren method can be substitution by Micro method to reduce time and blood required.