Final answer:
To draw a reticulocyte count, use a hematocrit tube to separate the formed elements of the blood and count the reticulocytes in the buffy coat.
Step-by-step explanation:
In order to draw a reticulocyte count, you would need to use a hematocrit tube. A reticulocyte count is a measurement of the number of immature red blood cells in the blood, and it is used to assess bone marrow function and evaluate certain types of anemia. The tube allows for the separation of the formed elements of the blood and the plasma, and the reticulocytes can be counted in the layer above the erythrocytes known as the buffy coat.