Final answer:
The LAVENDAR/PINK/PEARL/PURPLE tubes are typically used for hematology tests and blood typing with EDTA or heparin as anticoagulants, and they are sent to the Hematology department. Heparinized tubes are also used for plasma extraction and therapeutic drug monitoring.
Step-by-step explanation:
For blood samples placed into LAVENDAR/PINK/PEARL/PURPLE tubes, the tests typically run include complete blood counts (CBC), blood typing, and various hematology panels. The anticoagulants used in these tubes are either EDTA or sometimes heparin in the case of pearl or pink tubes designed for plasma determinations. The laboratory section these samples are most often sent to is the Hematology department. When blood samples are placed into heparinized tubes and centrifuged for plasma extraction, they are used for tests such as therapeutic drug monitoring (e.g., lamivudine or isoniazid levels) and prodrug extraction (e.g., for Cytarabine and its metabolites such as Ara-U).
Plasma pretreatment may involve procedures such as solid-phase extraction (SPE) using cation-exchange SPE cartridges or by using HLB cartridges. Additional plasma pretreatment steps could include protein precipitation with acetonitrile (ACN). In the determination of a patient's blood type, the visible agglutination seen in both wells with the addition of anti-A and anti-B antibodies indicates that the patient has AB positive blood type, which is a normal response for individuals with this blood type.