CPT (Certified Phlebotomy Technician) Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

For a LIGHT GREEN tube, what test is typically run, which anticoagulant is used, and to which lab section is it sent?

Blood typing, potassium oxalate, blood bank

Cardiac, lithium heparin, chemistry

The choice of the light green tube is typically associated with the use of lithium heparin as the anticoagulant. This tube is used primarily for tests related to the chemistry section of the laboratory, particularly for cardiac-related assays such as troponin and other cardiac markers.

Lithium heparin prevents clotting, making it suitable for tests that require plasma. In the laboratory environment, samples collected in light green tubes can be sent directly to the chemistry lab, aligning with the types of tests performed on plasma. This information is crucial for understanding the correct application of various blood collection tubes in phlebotomy and laboratory processes.

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PK, sodium heparin, chemistry

CBC, EDTA, hematology

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