It was found that both modified and simple sedimentation technique represents the insignificance (modified simple sedimentation techniqueใช้เวลา 60.18±42.20 นาที น้อยกว่าวิธี simple sedimentation ซึ่งใช้เวลา 154.27±45.33 นาที อย่างมีนัยสำคัญทางสถิติ (P < 0.001)) in cellular morphology and cell counts. Nevertheless this study is limited to perform only in pleural, ascetic and synovial fluids, other sites of body fluids should be studied further to compare the results. In conclusion, modified simple sedimentation technique was excellent to decrease turnaround time and cost of smear preparation. It is suggested that further study should be conducted to investigate the results in smear preparation from other sites of body fluids.