A new system of blood dilution which uses a self-filling, disposable micro-pipette and a prefilled, disposable plastic dilution container has been described. By this means a single .013 ml. sample of blood is all that is required to do a WBC, RBC, Hb and platelet count.

Comparison of the system (Unopette-B-D) with standard pipette counts proved to have a high index of correlation as far as hemoglobin, erythrocyte counts and leukocyte counts were concerned.

Platelet counts tended to show less agreement, the test system giving consistently lower results. The reasons for this were discussed.

The advantages of the new system were discussed.

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© 1963 by American Society of Hematology, Inc.
1963
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