What type of anticoagulant does a Lavender Top (LT) contain?

Question

BlackTom AI · Accepted Answer

The question asks: What type of anticoagulant does a Lavender Top (LT) contain?

Option context: In this item, no alternative answer choices are shown. The provided correct answer is EDTA.

Explanation of the concept: Lavender-top blood collection tubes are widely used in hematology for whole blood and certain hematologic tests. The key characteristic of LT tubes is the presence of an anticoagulant that preserves blood cell morphology by chelating calcium.

Why EDTA fits: EDTA (ethylenediaminetetraacetic acid) acts as an anticoagulant by binding calcium ions, which are necessary for clotting. By removing calcium, EDTA prevents the blood from clotting, preserving cellular components for accurate hematology analysis such as complete blood counts (CBC). This mechanism is well-established and differentiates EDTA from other common anticoagulants like heparin or citrate.

Considerations about missing options: Since the answer_options field is empty, there are no alternative choices to evaluate here. If other options were present, we would compare them against the known purpose of LT tubes and discuss why EDTA is the appropriate anticoagulant for typical tests associated with Lavender Tops.

Summarizing the core idea: Lavender-top tubes are designed to preserve cellular elements for hematology, and the anticoagulant that achieves this is EDTA due to its calcium-chelating action, which prevents coagulation and maintains cell integrity for accurate analysis.

VT122 Clinical Pathology QUIZ on 1/27

What type of anticoagulant does a Lavender Top (LT) contain?

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