Final answer:
Lavender-stopper tubes are most commonly used to collect Hematology tests. These tubes are used to collect blood samples for analysis in hematology, which is the study of blood and its disorders.
Step-by-step explanation:
Lavender-stopper tubes are most commonly used to collect Hematology tests. These tubes are used to collect blood samples for analysis in hematology, which is the study of blood and its disorders. The color-coded stoppers on the tubes indicate the type of additives present in the tube, and the lavender-stopper tubes contain the anticoagulant ethylenediaminetetraacetic acid (EDTA) to prevent blood from clotting. The blood collected in these tubes can be used for various tests to examine the cellular components of blood, such as red blood cells, white blood cells, and platelets, and to diagnose conditions like anemia, infections, and leukemia.