Objective To investigate the reference values of 18 parameters of venous blood cells among healthy adults in Tianjin area.

Methods The values of 18 parameters of venous blood from 1180 healthy adults in Tianjin area were measured by Sysmex KX-21 hematology analyzer and the results were analyzed.

Results The statistical analysis of the test reveals that significant differences exist in most parameters of venous blood cells according to the gender and age of people. Except the parameters of mean corpuscular volume, lymphocytes percentage, mean platelet volume, platelet distribution width, there were significant differences in the remaining parameters between the males group and the females group. Except the parameters of white blood count, platelet count, mean corpuscular hemoglobin, neutrophil percentage, absolute neutrophil count, mean platelet volume, platelet distribution width, there were significant differences in the remaining parameters between the old male group and the adult male group. Except the parameters of white blood count, mean corpuscular volume, mean corpuscular hemoglobin, there was no significant difference in the remaining parameters between the old female group and the adult female group.

Conclusions There are some differences between the findings and the reference range provided by the National Guide to Clinical laboratory Procedure. Therefore, it is necessary for laboratory to establish the reference values of venous blood cells according to concrete conditions.